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Prof. Dr. rer. nat. Peter Sperber

Hochschulleitung

Präsident

H 212

0991/3615-200

Sortierung:
Zeitschriftenartikel

  • Christian Vogt
  • S. Sinzinger
  • H. Adelsberger
  • Roland Maurer
  • Florian Schneider
  • R. Mandler
  • L. Kuepper
  • Rolf Rascher
  • Peter Sperber

An Experimental Study on a Flexible Grinding Tool

In: Advanced Materials Research vol. 325 pg. 91-96.

  • (2011)

DOI: 10.4028/www.scientific.net/AMR.325.91

  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Elektromobilität im ländlichen Raum: Chance für Regionalentwicklung, Tourismus und Alltagsmobilität

In: Kommunaler Tag Elektromobilität

Bundesministerium für Wirtschaft und Technologie Berlin

  • 06.04.2011 (2011)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

E-WALD Modellregion Elektromobilität Bayerischer Wald

In: 15. Projekttreffen „EvB“

Fürth

  • 2011 (2011)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

E-WALD Modellregion Elektromobilität Bayerischer Wald

IHK Oberpfalz Roding

  • 2011 (2011)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Elektromobilität im ländlichen Raum - Chancen für Regionalentwicklung, Tourismus und Alltagsmobilität

In: 19. C.A.R.M.E.N.-Symposium "Unendlich statt unwägbar- Erneuerbare Energien für die Zukunft"

Straubing

  • 12.06.2011 (2011)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Roland Maurer
  • Florian Schneider
  • Christian Vogt
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher

Physical marker based stitching process of circular and non-circular interferograms

  • (2011)

DOI: 10.1117/12.889491

  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Vortrag

  • Peter Sperber

E-WALD Modellregion Elektromobilität Bayerischer Wald

In: soleg Partnertreffen Photovoltaik

Teisnach

  • 2011 (2011)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Elektromobilität-Projekt E-WALD

In: Sitzung Umwelt- und Energieauschuss des Landkreises Straubing-Bogen

Straubing

  • 21.07.2011 (2011)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Christian Schopf
  • Rolf Rascher
  • Peter Sperber

Vor- und Nachteile der Ultraschalltechnologie beim Schleifen von optischen Flächen

In: Achtes Symposium - Zukunft Glas - von der Tradition zum High-Tech-Produkt

OTTI e.V., Zwiesel Zwiesel

  • 2010 (2010)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
Vortrag

  • Florian Schneider
  • Christian Vogt
  • Roland Maurer
  • Rolf Rascher
  • Peter Sperber

Effects of mechanical inaccuracies on the measurement result in metrology systems

In: SPIE Conference

Dalian, China

  • 2010 (2010)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
Beitrag (Sammelband oder Tagungsband)

  • Igor Makarenko
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
  • Thomas Stirner

ELID supported grinding of thin sapphire wafers

pg. 76550S ff..

  • (2010)
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Beitrag (Sammelband oder Tagungsband)

  • Markus Schinhärl
  • Florian Schneider
  • Rolf Rascher
  • Christian Vogt
  • Peter Sperber

Relationship between influence function accuracy and polishing quality in magnetorheological finishing

pg. 76550Y ff..

  • (2010)

DOI: 10.1117/12.865508

Abstract anzeigen

Magnetorheological finishing is a typical commercial application of a computer-controlled polishing process in the manufacturing of precision optical surfaces. Precise knowledge of the material removal characteristic of the polishing tool (influence function) is essential for controlling the material removal on the workpiece surface by the dwell time method. Results from the testing series with magnetorheological finishing have shown that a deviation of only 5% between the actual material removal characteristic of the polishing tool and that represented by the influence function caused a considerable reduction in the polishing quality. The paper discusses reasons for inaccuracies in the influence function and the effects on the polishing quality. The generic results of this research serve for the development of improved polishing strategies, and may be used in alternative applications of computer-controlled polishing processes that quantify the material removal characteristic by influence functions.
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber
  • T. Donaubauer
  • A. Zacherl

Einsatz der Elektrokinetischen Desintegration in Klärwerken und Biogasanlagen

In: IFAT Entsorga

München

  • 14.09.2010 (2010)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Christian Schopf
  • Peter Sperber
  • Rolf Rascher

Forschung für die Industrie im Technologiecampus Teisnach, Hochschule für Angewandte Wissenschaften – FH Deggendorf

In: Achtes Symposium - Zukunft Glas - von der Tradition zum High-Tech-Produkt

OTTI e.V., Zwiesel Zwiesel

  • 2010 (2010)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Christian Vogt
  • Markus Schinhärl
  • Florian Schneider
  • Peter Sperber
  • Rolf Rascher

Investigations on Grinding Tools for Silicon Carbide Based Advanced Materials

In: International Optical Design Conference 2010 (13-17 June 2010, Jackson Hole, WY, USA). null (Proceedings of SPIE. 2004-) pg. OWD2 ff..

Bellingham

  • (2010)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
Beitrag (Sammelband oder Tagungsband)

  • Markus Schinhärl
  • Christian Vogt
  • Florian Schneider
  • Peter Sperber
  • Rolf Rascher

Investigations on Magnetorheological Finishing of High-Quality Optical Surfaces with Varying Influence Function (Proceedings of Optical Fabrication and Testing 2010; Jackson Hole, WY, USA; June 13-17, 2010)

pg. OWD3 ff..

Washington, DC, USA

  • (2010)

DOI: 10.1364/OFT.2010.OWD3

  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Sturktur der Technologiecampi der Hochschule Deggendorf im Bayerischen Wald

In: Runder Tisch Wirtschaft

Regen

  • 12.05.2010 (2010)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Regionalisierung der Hochschule Deggendorf - Technologieregion Bayerischer Wald

IHK Gremium Schwaben

  • 24.04.2010 (2010)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Optoelectronic Distance Measurement (invited review lecture)

In: 1st International Workshop on Novel Developments and Applications in Sensor Technology

Coburg

  • September 2009 (2009)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Christian Vogt
  • R. Stamp
  • G. Smith
  • Rolf Rascher
  • Peter Sperber
  • Florian Schneider
  • Roland Maurer
  • Markus Schinhärl

Strategies for grinding optical free-forms using ball-shaped grinding wheels

In: SPIE Optifab

SPIE - The International Society for Optical Engineering Rochester, NY, USA

  • 11.05.2009 (2009)

Abstract anzeigen

The demand for non-spherical surfaces and free-forms is steadily growing. Aspherical lenses can reduce the number of necessary lenses in optical systems e.g. used for lithographic devices for production of microprocessors. Parabolic mirrors can be used to focus light beams highly efficiently because of low absorption rates without colour distortion. Combined optical devices with included mechanical functions for assembly reduce necessary production steps. The most common pre-machining method for small numbers of high-precision lenses and mirrors is grinding. Depending on the required shape there are different options for generating surfaces e. g. spheres, parabolic mirrors or combined forms. The most flexible ones are grinding with (i) workpiece and ball-shaped tool rotating and (ii) fixed workpiece with ball-shaped tool rotating. In this manuscript grinding strategies dealing with meander and spiral tool paths are investigated in order to define which strategy works best for machining off-axis parabolic mirrors.
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Markus Schinhärl
  • G. Smith
  • R. Stamp
  • Rolf Rascher
  • L. Smith
  • Elmar Pitschke
  • Peter Sperber
  • Andreas Geiss

Mathematical modelling of influence functions in computer-controlled polishing. Part II

In: Applied Mathematical Modelling vol. 32 pg. 2907-2924.

  • (2008)

Abstract anzeigen

Computer-controlled polishing (CCP) is commonly used to finish high-quality surfaces, such as optical lenses. Based on magnetorheological finishing (MRF), a mathematical model to calculate the polishing tool characteristic (influence function) was developed and verified experimentally. The second part of this paper describes the calculation of the distribution of material removal within the size of an influence function and is based on Preston’s fundamental polishing equation. The complete influence function model was implemented using MATLAB. The result is a user-friendly and easy-to-use software tool that enables fast computation of MRF influence functions without the current cumbersome determination procedure, and thus gives improved and more economical production of high-quality surfaces.
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • Markus Schinhärl
  • Rolf Rascher
  • Peter Sperber
  • J. Slabeycius
  • K. Fathima
  • Christian Vogt

Magnetorheological Finishing of silicon nitride moulds

  • (2008)
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
Beitrag (Sammelband oder Tagungsband)

  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber

Ultraschallunterstütztes Schleifen von Linsen

pg. 191-203.

  • (2008)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Rolf Rascher
  • Peter Sperber
  • L. Smith
  • R. Stamp
  • M. Smith

Simulation of a complex optical polishing process using a neural network

In: Robotics and Computer-Integrated Manufacturing vol. 24 pg. 32-37.

  • (2008)

DOI: 10.1016/j.rcim.2006.07.003

Abstract anzeigen

Most modern manufacturing processes change their set of parameters during machining in order to work at the optimum state. But in some cases, like computer-controlled polishing, it is not possible to change these parameters during the machining. Then usually a standard set of parameters is chosen which is not adjusted to the specific conditions. To gather the optimum set of parameters anyway simulation of the process prior to manufacturing is a possibility. This research illustrates the successful implementation of a neural network to accomplish such a simulation. The characteristic of this neural network is described along with the decision of the used inputs and outputs. Results are shown and the further usage of the neural network within an automation framework is discussed. The ability to simulate these advanced manufacturing processes is an important contribution to extend automation further and thus increase cost effectiveness.
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • TC Teisnach Optik
Beitrag (Sammelband oder Tagungsband)

  • Josef Kölbl
  • M. Fröschl
  • A. Seedsman
  • Peter Sperber

Near-Infrared Laser Range Finder, using kHz Repetition Rate

  • (2008)

DOI: 10.1117/12.800132

Abstract anzeigen

The paper deals with laser range finding (LRF) technology for tracking fast-moving objects with kHz laser repetition rates. The LRF is based on time-of-flight measurement, where a short emitting laser pulse is transmitted and its time-of-flight is accurately measured by the electronics with respect to the received impulse from a non-cooperative target. The emitted laser energy is in the near infrared wavelength region. The detector is based on a single-photon detection principle of a silicon Avalanche photodiode, operated in so-called Geiger mode. A solution was devised to utilise single photon detection even at strong daylight conditions. The LRF has been integrated in a robust and compact technology demonstrator, and has successfully ranged to rapidly-moving and accelerating small targets. A detailed mathematical model was developed to predict the ranging performance of the LRF for evolution of application-specific designs. The current technology allows ranging up to a maximum range of 1.5 km with ± 0.5 m accuracy against large stationary targets, as well as tracking of small targets of 75 mm diameter moving up to a range of 300 m with a speed resolution of ± 5 m/s. The LRF device uses a standard serial protocol for device communication and control, and operates at a temperature range from 0 °C - 55 °C.
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • K. Fathima
  • J. Slabeycius
  • L. Hajduchova
  • Rolf Rascher
  • Peter Sperber
  • Markus Schinhärl

Examination of surface and subsurface damages on silicon wafers using dimple polishing

  • (2008)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Markus Schinhärl
  • Christian Vogt
  • Andreas Geiss
  • R. Stamp
  • Peter Sperber
  • L. Smith
  • G. Smith
  • Rolf Rascher

Forces acting between polishing tool and workpiece surface in magnetorheological finishing

vol. 7060 pg. 706006 ff..

  • (2008)

DOI: 10.1117/12.794196

Abstract anzeigen

Magnetorheological finishing is a computer-controlled polishing technique that is used mainly in the field of high-quality optical lens production. The process is based on the use of a magnetorheological polishing fluid that is able, in a reversible manner, to change its viscosity from a liquid state to a solid state under the control of a magnetic field. This outstanding characteristic facilitates rapid control (in milliseconds) of the yield stress, and thus the pressure applied to the workpiece surface to be polished. A three-axis dynamometer was used to measure the forces acting between the magnetorheological fluid and the workpiece surface during determination of the material removal characteristic of the polishing tool (influence function). The results of a testing series using a QED Q22-X MRF polishing machine with a 50 mm wheel assembly show that the normal forces range from about 2 to 20 N. Knowledge of the forces is essential, especially when thin workpieces are to be polished and distortion becomes significant. This paper discusses, and gives examples of, the variation in the parameters experienced during a programme of experiments, and provides examples of the value of this work.
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
Vortrag

  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber

Ultraschallunterstütztes Schleifen von Linsen

In: Siebtes Symposium - Zukunft Glas - von der Tradition zum High-Tech-Produkt

OTTI e.V., Zwiesel Zwiesel

  • 04.-05.06.2008 (2008)
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Markus Schinhärl
  • R. Stamp
  • Elmar Pitschke
  • Rolf Rascher
  • L. Smith
  • G. Smith
  • Andreas Geiss
  • Peter Sperber

Advanced techniques for computer-controlled polishing

In: Current Developments in Lens Design and Optical Engineering IX vol. 7060

  • (2008)

DOI: 10.1117/12.808036

Abstract anzeigen

Computer-controlled polishing has introduced determinism into the finishing of high-quality surfaces, for example those used as optical interfaces. Computer-controlled polishing may overcome many of the disadvantages of traditional polishing techniques. The polishing procedure is computed in terms of the surface error-profile and the material removal characteristic of the polishing tool, the influence function. Determinism and predictability not only enable more economical manufacture but also facilitate considerably increased processing accuracy. However, there are several disadvantages that serve to limit the capabilities of computer-controlled polishing, many of these are considered to be issues associated with determination of the influence function. Magnetorheological finishing has been investigated and various new techniques and approaches that dramatically enhance the potential as well as the economics of computer-controlled polishing have been developed and verified experimentally. Recent developments and advancements in computer-controlled polishing are discussed. The generic results of this research may be used in a wide variety of alternative applications in which controlled material removal is employed to achieve a desired surface specification, ranging from surface treatment processes in technical disciplines, to manipulation of biological surface textures in medical technologies.
  • Elektrotechnik und Medientechnik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • J. Slabeycius
  • Rolf Rascher
  • Markus Schinhärl
  • Peter Sperber
  • K. Fathima

Material influence of silicon nitride at Magnetorheological Finishing (MRF)

  • (2008)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • TC Teisnach Optik
Zeitschriftenartikel

  • Markus Schinhärl
  • Rolf Rascher
  • R. Stamp
  • L. Smith
  • G. Smith
  • Peter Sperber
  • Elmar Pitschke

Utilisation of time-variant influence functions in the computer-controlled polishing

In: Precision Engineering vol. 32 pg. 47-54.

  • (2008)

DOI: 10.1016/j.precisioneng.2007.04.005

Abstract anzeigen

In the computer controlled polishing, a polishing tool moves in a well-defined manner across the workpiece surface in order to individually remove the surface error-profile. The commonly used technique to calculate the moving of the polishing tool is the dwell time method. Based on a constant (time-invariant) removal characteristic of the polishing tool (influence function) the amount of material to be removed is controlled via the dwell time. The longer the polishing tool is in contact with a particular area of the workpiece, the more material is removed at this position. Mathematical basics to calculate dwell time-profiles are shown, and a new approach considering time-variant influence functions for the computer controlled polishing is introduced. The results point out that time-variant influence functions may contribute to further decrease the process time, and thus to make a computer controlled polishing process more efficient. The reduction of the process time was observed to approximately 35% using a combination of the dwell time method with time-variant influence functions.
  • Elektrotechnik und Medientechnik
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Vortrag

  • Peter Sperber

Kontakte knüpfen, Bekanntheit steigern, Nutzen stiften: Beispielhafte Kooperationsmöglichkeiten zwischen Wissenschaft und Wirtschaft an der besten Fachhochschule Deutschlands!

In: Kongress für Personalmarketing - Mitarbeiter finden, führen und behalten

Bamberg

  • 2008 (2008)
  • Hochschulleitung und -einrichtungen
Vortrag

  • K. Fathima
  • Christian Schopf
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber

Precision finishing of aspherical optical components using ELID grinding

In: Siebtes Symposium - Zukunft Glas - von der Tradition zum High-Tech-Produkt

OTTI e.V., Zwiesel Zwiesel

  • 04.-05.06.2008 (2008)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
Vortrag

  • Markus Schinhärl
  • G. Smith
  • Andreas Geiss
  • L. Smith
  • Rolf Rascher
  • Peter Sperber
  • Elmar Pitschke
  • R. Stamp

Calculation of MRF influence functions

In: Optical Manufacturing and Testing VII, SPIE

San Diego, CA, USA

  • 2007 (2007)
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
Zeitschriftenartikel

  • Thomas Bartscher
  • Wolfgang Dorner
  • Peter Sperber
  • Reinhard Höpfl

Synergien nutzen, Entwicklungen gemeinsam gestalten

In: Die neue Hochschule (DNH) vol. 48 pg. 16-18.

  • (2007)
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • Institut für Existenzgründung
  • DIGITAL
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber
  • K. Fathima
  • J. Slabeycius

Subsurface damages detecting on standard optical glass by dimple method

pg. 13 ff..

  • (2007)
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Zeitschriftenartikel

  • Elmar Pitschke
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • M. Smith
  • L. Smith
  • Markus Schinhärl

Lens production enhancement by adoption of artificial influence functions and a knowledge-based system in a magnetorheological finishing process

In: Optical Manufacturing and Testing VII vol. 6671 pg. 66711J ff..

  • (2007)

DOI: 10.1117/12.761356

Abstract anzeigen

High quality optical lenses are usually finished by magnetorheological finishing (MRF). In this process an abrasive fluid, with the ability to stiffen in a magnetic field, is used as the polishing tool in a computer-controlled machine tool. Although the machine is automated it is necessary for a skilled operator to set the machine and make judgments with regard to its operation. An investigation has been under way to examine the detailed operation of the MRF process, and the information that is necessary to establish best practice. This has resulted in the incorporation of a knowledge based system (KBS) into the machine control regime, and a methodology for the creation of artificial polishing tool characteristics, the machine influence function. The incorporation of the these elements has been instrumental in the operation of an enhanced MRF machine. This has been subject to extensive test procedures, and it has been demonstrated that the production process may be enhanced significantly and consistently. Batch production time may be significantly reduced, a figure in excess of a 50% reduction was met consistently during prolonged operation. Furthermore the incorporation of the KBS is instrumental in increasing the automation of the MRF process, reducing the levels of manual input necessary to manage machine operation.
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
Zeitschriftenartikel

  • Markus Schinhärl
  • G. Smith
  • Andreas Geiss
  • L. Smith
  • Rolf Rascher
  • Peter Sperber
  • Elmar Pitschke
  • R. Stamp

Calculation of MRF influence functions

In: Optical Manufacturing and Testing VII vol. 6671 pg. 66710Y ff..

  • (2007)

Abstract anzeigen

Magnetorheological finishing (MRF) is a commonly used computer-controlled polishing (CCP) technique for high precision optical surfaces. The process is based on a magnetorheological abrasive fluid, which stiffens in a magnetic field and may be employed as a sub-aperture polishing tool. Dependent upon the surface error-profile of the workpiece and the polishing tool characteristic (influence function) an individual polishing procedure is calculated prior to processing. However, determination of the influence function remains a time consuming and laborious task. A user friendly and easy to use software tool has been developed, which enables rapid computation of MRF influence functions dependent on the MRF specific parameters, such as, magnetic field strength or fluid viscosity. The software supersedes the current cumbersome and time consuming determination procedure and thus results in considerably improved and more economical manufacture. In comparison with the conventional time period of typically 20 minutes to ascertain an influence function, it may now be calculated in a few seconds. An average quality improvement of 57% relating to the peak-valley (PV) value, and approximately 66% relating to the root-mean-square (RMS) of the surface error-profiles was observed during employment of the artificial computed influence functions for polishing.
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
Vortrag

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber
  • K. Fathima
  • J. Slabeycius

Subsurface damages detecting on standard optical glass by dimple method

In: The 12th International Conference on Problems of Material Engineering, Mechanics and Design

Jasna, Slowakei

  • 29.-31.08.2007 (2007)
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
Vortrag

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber
  • J. Slabeycius

Deposits and damages on high precision surfaces of advanced materials

In: 5th Youth Symposium on Experimental Solid Mechanics

Puchov, Slowakei

  • 10.-13.05.2006 (2006)
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber

Rauhigkeitsentwicklung bei der Bearbeitung von Komponenten für die Präzisionsoptik mit Diamantwerkzeugen

pg. 143-153.

  • (2006)
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
Beitrag (Sammelband oder Tagungsband)

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber
  • J. Slabeycius

Deposits and damages on high precision surfaces of advanced materials

  • (2006)
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Maschinenbau und Mechatronik
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Rolf Rascher
  • Peter Sperber
  • L. Smith
  • R. Stamp
  • M. Smith

Simulation of a complex optical polishing process using a neural network

In: Robotics and Computer-Integrated Manufacturing vol. 24 pg. 32-37.

  • (2006)

DOI: 10.1016/j.rcim.2006.07.003

Abstract anzeigen

Most modern manufacturing processes change their set of parameters during machining in order to work at the optimum state. But in some cases, like computer-controlled polishing, it is not possible to change these parameters during the machining. Then usually a standard set of parameters is chosen which is not adjusted to the specific conditions. To gather the optimum set of parameters anyway simulation of the process prior to manufacturing is a possibility. This research illustrates the successful implementation of a neural network to accomplish such a simulation. The characteristic of this neural network is described along with the decision of the used inputs and outputs. Results are shown and the further usage of the neural network within an automation framework is discussed. The ability to simulate these advanced manufacturing processes is an important contribution to extend automation further and thus increase cost effectiveness.
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Elektrotechnik und Medientechnik
  • Maschinenbau und Mechatronik
Vortrag

  • Rolf Rascher
  • Peter Sperber

Aktuelle Ergebnisse aus dem Labor Optical Engineering der FH Deggendorf zu den Arbeiten auf den Gebieten Ultraschallunterstütztes Schleifen und ELID-Schleifen

In: BayTech Optik Seminar

Deggendorf

  • 2006 (2006)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
Vortrag

  • Markus Schinhärl
  • Andreas Geiss
  • Rolf Rascher
  • Peter Sperber
  • R. Stamp
  • L. Smith
  • G. Smith
  • Elmar Pitschke

Coherences between influence function size, polishing quality and process time in the magnetorheological finishing

In: Current Developments in Lens Design and Optical Engineering VII

San Diego, CA, USA

  • 2006 (2006)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
  • Maschinenbau und Mechatronik
Zeitschriftenartikel

  • Markus Schinhärl
  • Andreas Geiss
  • Rolf Rascher
  • Peter Sperber
  • R. Stamp
  • L. Smith
  • G. Smith
  • Elmar Pitschke

Coherences between influence function size, polishing quality and process time in the magnetorheological finishing

In: Current Developments in Lens Design and Optical Engineering VII vol. 6288 pg. 62880Q ff..

  • (2006)

DOI: 10.1117/12.678720

Abstract anzeigen

Magnetorheological finishing (MRF) is a computer controlled polishing process (CCP), which is commonly used in the field of high quality optical lens production. The process uses the material removal characteristic of the polishing tool (influence function) and the surface error-profile to calculate individual, surface error-profile dependent polishing sequences. At the University of Applied Sciences Deggendorf a testing series with a magnetorheological finishing machine has been performed, and effects of the influence function size and its removal capacity on the polishing quality and the process time have been investigated. The result of the research shows that the influence function size has a major effect on the process time, whereas the polishing quality is nearly independent of the influence function size. During the testing series the process time was significantly reduced using an appropriate influence function size. The process time decreased about 9% relating to the original influence function.
  • Elektrotechnik und Medientechnik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • R. Brunswick
  • B. Cook
  • G. Pentland
  • Peter Sperber

Telescope design considerations and a unique approach to delay line construction for the proposed Antarctic interferometer at Dome C

  • (2006)
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • M. Smith
  • L. Smith

Correlation between influence- function quality and predictability of a computer-controlled polishing process

In: Optical Engineering vol. 45 pg. 063401 ff..

  • (2006)

DOI: 10.1117/1.2213630

Abstract anzeigen

A mathematical method has been developed to analyze influence functions that are used in a computer-controlled polishing process. The influence function itself is usually generated by some kind of calibration where the exact procedure is dependent on the process used. The method is able to determine asymmetries in an influence function. Application of this method yields a value that may be used to judge the quality of an influence function. That quality is also an indicator of the variance of the evolving surface error profile, since a close relationship between it and the polishing process exists. On the basis of an ideal, theoretical process, a model to handle and quantify the result of a real polishing process is described. Practical application of this model demonstrates the effect of influence-function quality on the polishing result. Based on this model, the predictability of the polishing result is evaluated. This initiative to judge influence functions by their quality is an important contribution to the development of computer-controlled polishing. Due to improved process reliability, the reject rate will decrease, and the result will be more economic manufacture.
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
Vortrag

  • Elmar Pitschke
  • Markus Schinhärl
  • Andreas Geiss
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • L. Smith
  • M. Smith

A new approach to predict computer-controlled polishing results

In: Optical Manufacturing and Testing VI

San Diego, CA, USA

  • 31.07.2005 (2005)

Abstract anzeigen

A novel approach to handle and quantify a computer controlled polishing process will be introduced. This approach will be compared to real data. This comparison indicates the correctness of this approach. Based on it a formula has been developed to predict the results of a computer controlled polishing process. The formula will be used to predict real polishing processes and the results will be compared to the real results. The limits when using this formula will be shown along with suggestions when the formula would be useful. This rough prediction of the computer controlled polishing results may be used to enhance the automation of a computer controlled polishing process. Also a way to improve the formula itself will be introduced. It is the opinion of the author that by further stabilizing of the whole computer controlled polishing process the whole system becomes more robust, the prediction more accurate and the whole system improves in reliability and the results become better.
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Vortrag

  • Elmar Pitschke
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher

Utilizing a TII aspherical measurement machine in a computer-controlled polishing process

In: Optical Measurement Systems for Industrial Inspection IV

München

  • 13.06.2005 (2005)
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Zeitschriftenartikel

  • Markus Schinhärl
  • Elmar Pitschke
  • Andreas Geiss
  • Rolf Rascher
  • Peter Sperber
  • R. Stamp
  • L. Smith
  • G. Smith

Comparison of different magnetorheological polishing fluids

In: Optical Fabrication, Testing, and Metrology II vol. 5965 pg. 659-670.

  • (2005)

DOI: 10.1117/12.656430

Abstract anzeigen

Magnetorheological Finishing (MRF) is commonly used to finish high quality optical surfaces. The process is based on a magnetorheological fluid, which stiffens in a magnetic field and thus may be used as a polishing tool. The fluid removal characteristic depends on several parameters, for example the magnetic field strength or the relative velocity between workpiece and polishing tool. Another parameter is the fluid itself. Different compositions of polishing abrasives result in different removal characteristics. At the University of Applied Sciences Deggendorf, five different magnetorheological polishing fluids have been analysed. The results of the research are scanning electron microscope analyses as well as spectra analyses. The removal characteristic for each fluid has been determined for different glass materials. Finally, the fluid conditions during polishing have been analysed. For this purpose, the fluid flow rate, the fluid pressure and the fluid viscosity have been investigated.
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Elektrotechnik und Medientechnik
Vortrag

  • Andreas Geiss
  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber

Analysis of thermal sources in a magnetorheological finishing (MRF) process

In: Optical Manufacturing and Testing VI

San Diego, CA, USA

  • 31.07.2005 (2005)
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Elektrotechnik und Medientechnik
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher

Utilizing a TII aspherical measurement machine in a computer-controlled polishing process

In: Optical Measurement Systems for Industrial Inspection IV vol. 5856 pg. 987-993.

  • (2005)

DOI: 10.1117/12.612597

Abstract anzeigen

The demand on quality of optical surfaces is increasing from year to year. Computer controlled polishing is one way to fulfill these demands. The process depends on the error-profile of the optical surface. In this paper the usage of the TII measurement machine is discussed to manufacture optical surfaces.
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Andreas Geiss
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • L. Smith
  • M. Smith

A new approach to predict computer-controlled polishing results

In: Optical Manufacturing and Testing VI vol. 5869 pg. 94-102.

  • (2005)

DOI: 10.1117/12.616780

Abstract anzeigen

A novel approach to handle and quantify a computer controlled polishing process will be introduced. This approach will be compared to real data. This comparison indicates the correctness of this approach. Based on it a formula has been developed to predict the results of a computer controlled polishing process. The formula will be used to predict real polishing processes and the results will be compared to the real results. The limits when using this formula will be shown along with suggestions when the formula would be useful. This rough prediction of the computer controlled polishing results may be used to enhance the automation of a computer controlled polishing process. Also a way to improve the formula itself will be introduced. It is the opinion of the author that by further stabilizing of the whole computer controlled polishing process the whole system becomes more robust, the prediction more accurate and the whole system improves in reliability and the results become better.
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Elektrotechnik und Medientechnik
  • Maschinenbau und Mechatronik
  • TC Teisnach Optik
Vortrag

  • Elmar Pitschke
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • L. Smith
  • M. Smith
  • A. Hammer

Comparison of a new contact topographical measurement system for spherical and aspherical surfaces with interferometry

In: Current Developments in Lens Design and Optical Engineering V

Denver, CO, USA

  • 02.08.2004 (2004)
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Elektrotechnik und Medientechnik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Peter Sperber
  • S. Riepl

Two Color Satellite Laser Ranging: Evaluation of Atmospheric Refraction

In: Geodesia I Kartographia pg. 19.

  • (2004)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Elmar Pitschke
  • Markus Schinhärl
  • Rolf Rascher
  • Peter Sperber

Erzeugung hochpräziser Oberflächen auf optischen Bauelementen für die Präzisionsoptik mit magnetorheologischem Finishing (MRF)

In: Fünftes Symposium - Zukunft Glas - Von der Tradition zum High-Tech-Produkt

Zwiesel

  • 17.06.2004 (2004)
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Elektrotechnik und Medientechnik
  • TC Teisnach Optik
  • Hochschulleitung und -einrichtungen
  • Maschinenbau und Mechatronik
Zeitschriftenartikel

  • Markus Schinhärl
  • Elmar Pitschke
  • Rolf Rascher
  • Peter Sperber
  • R. Stamp
  • L. Smith
  • G. Smith

Temporal stability and performance of MR polishing fluid

In: Current Developments in Lens Design and Optical Engineering V vol. 5523 pg. 273-280.

  • (2004)

DOI: 10.1117/12.558897

Abstract anzeigen

The lifetime of standard magnetorheological (MR) polishing fluids, used for example in polishing machines for optical applications, is limited. Scanning electron microscope examinations as well as chemical analyses of the fluid had been undertaken in order to investigate reasons for limited lifetime. We found out that the removal rate decreases during the course of time. However, the usable fluid life is most limited by the point of time when the critical minimum amount of fluid, necessary to ensure circulation, is reached. The results in association with a new fluid conditioner show, that a standard MR polishing fluid may be used for longer periods than common periods of about 2 weeks.
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
Zeitschriftenartikel

  • Elmar Pitschke
  • Markus Schinhärl
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • L. Smith
  • M. Smith
  • A. Hammer

Comparison of a new contact topographical measurement system for spherical and aspherical surfaces with interferometry

In: Current Developments in Lens Design and Optical Engineering V vol. 5523 pg. 225-234.

  • (2004)

DOI: 10.1117/12.558899

Abstract anzeigen

Since end of 2003 the TII-3D - the new contact topography measuring device for measuring aspherical and spherical surfaces - is available on market. Due to its novel technology, the system is specified to measure a large range with λ/10 accuracy, therefore being a very flexible tool for pre- and post-measurements in high quality zonal polishing processes like MRF. At the University of Applied Sciences Deggendorf a testing series has been carries out to compare the results of the TII-3D with CGH-interferometric measurements on aspherical surfaces. An analysis of the measurement errors is shown and ranking of the different metrology systems for production processes of high quality aspherical lenses is given.
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
Zeitschriftenartikel

  • K. Hamal
  • I. Prochazka
  • G. Kirchner
  • U. Schreiber
  • R. Riepl
  • Peter Sperber
  • W. Gurtner
  • G. Appleby
  • P. Gibbis
  • Y. FuMin
  • R. Neubert
  • L. Grunwaldt

Satellite Laser Ranging Portable Calibration Standard Missions 1997-2002

In: Geophysical Research Abstracts vol. 5 pg. 14013.

  • (2003)

Abstract anzeigen

The recent requirement of the Satellite Laser Ranging SLR technique is to reach the accuracy of a millimeter. This requires keeping all the system biases on the sub millimeter level. The Portable Calibration Standard is a global reference for Satellite Laser Ranging systems biases identification and evaluation. It consists of the Pico Event Timer P-PET, meteorological station, epoch and frequency time base, set of reference retroreflectors and the control / data processing software package. The P-PET is compact, stable and easy to re-allocate within days. Its properties are appropriate for calibration standard purposes: the timing resolution is 1.2 psec, 2.5 psec per channel timing jitter, the temporal stability is less than 0.5 psec per hour and below 0.5 psec per Kelvin. The key feature of the timing system is its long term stability: no adjustments and settings are needed. Before we could start the global SLR network calibration, we had to succeed with the calibration missions at several SLR stations in Austria, Germany, Switzerland, United Kingdom, China and Chile. This enabled us to understand the feasibility of using the Pico Event Timer P-PET. Summarizing the results: the ranging precision to ground target is 1-3 millimeters, to satellites is 3-7 millimeters rms, the Calibration Standard demonstrated its capability to identify the SLR system range and time biases at the one-millimeter level. These results might serve as a background to the proposed 6th Framework programme EU Integrated Project EUROLAS CALNet.
  • Hochschulleitung und -einrichtungen
Vortrag

  • Elmar Pitschke
  • Peter Sperber
  • Rolf Rascher
  • R. Stamp
  • M. Smith
  • L. Smith
  • Markus Schinhärl

Lens production enhancement by adoption of artificial influence functions and a knowledge-based system in a magnetorheological finishing process

In: Optical Manufacturing and Testing VII

San Diego, CA, USA

  • 03.08.2003 (2003)
  • Hochschulleitung und -einrichtungen
  • TC Teisnach Optik
  • Maschinenbau und Mechatronik
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • Elektrotechnik und Medientechnik
Vortrag

  • Peter Sperber
  • T. Stautmeister
  • Andreas Baumgartner
  • Josef Kölbl
  • H. Tauscher
  • J. Kellner

High accuracy short range laser meter for system calibration and installation

In: 13th International Workshop on Laser Ranging

Washington, DC, USA

  • 2002 (2002)
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
Beitrag (Sammelband oder Tagungsband)

  • Rolf Rascher
  • Peter Sperber

IFHEM – Innovatives Fertigungskonzept für High Tech-Flächen durch Einsatz von MRF-Technologie

  • (2002)
  • Hochschulleitung und -einrichtungen
  • Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen
  • TC Teisnach Optik
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber
  • Andreas Baumgartner
  • Josef Kölbl
  • H. Tauscher
  • J. Kellner

Hochgenaues optisches Entfernungsmesssystem für industrielle Anwendungen

  • (2002)
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber
  • S. Riepl

Two Color Satellite Laser Ranging Technology: A Tool for the Evaluation of Atmospheric Refraction Models (Invited Paper)

In: International Conference Mathematical and Physical Methods in Ecology and Environmental Monitoring

Moskau, Russland

  • 2001 (2001)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Kompetenzzentrum Glas: Neue Glastechnologien und optische Kommunikationsanwendungen

In: Drittes Symposium Zukunft Glas-Von der Tradition zum High-Tech-Produkt

OTTI e.V., Zwiesel Zwiesel

  • 2000 (2000)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • H. Hase
  • W. Schlüter
  • A. Böer
  • R. Dassing
  • Peter Sperber
  • R. Kilger

TIGO - Transportable Integrated Geodetic Observatory, a Fundamental Station for Geodynamic Research

pg. 39.

Hönefoss, Norway

  • (1997)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • H. Hase
  • W. Schlüter
  • A. Böer
  • R. Dassing
  • Peter Sperber
  • R. Kilger

Status of the TIGO Project

  • (1996)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • H. Hase
  • A. Böer
  • W. Schlüter
  • R. Dassing
  • Peter Sperber
  • R. Kilger

TIGO - a Fundamental Geodetic Reference Station

pg. 114.

  • (1996)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber
  • W. Schlüter
  • A. Böer
  • R. Dassing
  • H. Hase
  • R. Kilger

TIGO-Project, Concept-Status-Plans

  • (1996)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • W. Schlüter
  • A. Böer
  • R. Dassing
  • H. Hase
  • R. Kilger
  • E. Reinhart
  • B. Richter
  • W. Riepl
  • U. Schreiber
  • H. Seeger
  • Peter Sperber

Die Fundamentalstation Wettzell

In: Beiträge zum J. J. Baeyer-Symposium. null (Reihe E) pg. 143.

Berlin-Köpenick

  • (1996)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Upgrade of the Receiving and Control System of MTLRS-1 and First Results of the Collocation in Wettzell

In: 6th General Assembly of Wegener

St. Petersburg, Russland

  • 20.-24.06.1994 (1994)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber

Upgrade of the Receiving and Control System of MTLRS-1 and First Results of the Collocation in Wettzell

In: Proceedings of the 6th General Assembly of Wegener. null (NAS5-31330) pg. 58.

  • (1994)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber
  • W. Schlüter
  • A. Böer
  • R. Dassing
  • H. Hase
  • R. Kilger

The Transportable Integrated Geodetic Observatory (TIGO)

pg. 183-197.

  • (1994)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • H. Braakman
  • van der Kra, M.
  • H. Visser
  • van der Zwa, B.
  • Peter Sperber

TIGO-SLR Opto-Mechanical Configuration

pg. 198-206.

  • (1994)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber
  • W. Schlüter
  • A. Böer
  • R. Dassing
  • H. Hase
  • R. Kilger

The Transportable Integrated Geodetic Observatory (TIGO)

In: 9th International Workshop on Laser Ranging Instrumentation

Canberra, Australien

  • 1994 (1994)
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • W. Schlüter
  • R. Dassing
  • Peter Sperber
  • H. Seeger
  • R. Kilger
  • U. Schreiber

Die Fundamentalstation Wettzell und ihr Beitrag zu geodätisch-geodynamischen Forschungsvorhaben

In: zfv - Zeitschrift für Geodäsie, Geoinformation und Landmanagement pg. 440.

  • (1993)
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • W. Schlüter
  • R. Dassing
  • Peter Sperber
  • R. Kilger
  • U. Schreiber

Die Fundamentalstation Wettzell in internationalen Meßprogrammen

In: avn - allgemeine vermessungs-nachrichten vol. 99 pg. 438-449.

  • (1992)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber
  • U. Hessels
  • R. Motz
  • W. Beek
  • J. Offierski
  • C. van Es

The new MTLRS Transmitting System

In: 8th International Workshop on Laser Ranging Instrumentation

Annapolis, MD, USA

  • 18.-22.05.1992 (1992)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • E. Vermaat
  • J. Offierski
  • K. Otten
  • W. Beek
  • C. van Es
  • Peter Sperber

Transputer Based Control System for MTLRS

pg. 12-40.

  • (1992)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber
  • U. Hessels
  • R. Motz
  • H.-M. Güther

The new MTLRS#1 Receiving System

In: 8th International Workshop on Laser Ranging Instrumentation

Annapolis, MD, USA

  • 18.-22.05.1992 (1992)
  • Hochschulleitung und -einrichtungen
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber
  • P. Wilson

Status report of the Modular Transportable Laser Ranging System MTLRS-1

pg. 89.

  • (1989)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Technical Aspects of the MTLRS-1 Upgrade

In: 7th International Workshop on Laser Ranging Instrumentation

Matera, Italien

  • 02.10.1989 (1989)
  • Hochschulleitung und -einrichtungen
Vortrag

  • Peter Sperber

Status report of the Modular Transportable Laser Ranging System MTLRS-1

In: 7th International Workshop on Laser Ranging Instrumentation

Matera, Italien

  • 02.10.1989 (1989)
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Peter Sperber
  • W. Spangler
  • B. Meier
  • A. Penzkofer

Experimental and theoretical investigation of tunable picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers

In: Optical and Quantum Electronics vol. 20 pg. 395-431.

  • (1988)

DOI: 10.1007/BF00632467

Abstract anzeigen

Picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers is studied experimentally and theoretically. Frequency-tunable pulses between 720 and 940 nm are generated with a picosecond ruby laser pump source. The amplification of spontaneous emission and of seeding pulses in the generator and amplifier cells is investigated. Stimulated emission cross-sections and excited-state absorption cross-sections are determined by computer simulations. The coherence properties of the generated radiation are analysed. Resonance Raman contributions are resolved.
  • Elektrotechnik und Medientechnik
  • Hochschulleitung und -einrichtungen
Zeitschriftenartikel

  • Peter Sperber
  • A. Penzkofer

Pulse-shape determination of intracavity compressed picosecond pulses by two – photon fluorescence analysis

In: Optical and Quantum Electronics vol. 18 pg. 145.

  • (1986)

  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
Zeitschriftenartikel

  • Peter Sperber
  • A. Penzkofer

S0-S1 two-photon absorption dynamics of rhodamine dyes

In: Optical and Quantum Electronics vol. 18 pg. 381-401.

  • (1986)

Abstract anzeigen

The intensity-dependent transmission of picosecond ruby laser pulses of different duration through methanolic and ethanolic solutions of rhodamine B and rhodamine 6G is analysed. The transmission is affected by S0-S n two-photon absorption, by stimulated emission at the pump-laser frequency, by amplified spontaneous emission and by excited-state absorption. Various parameters involving the two-photon absorption dynamics are determined by comparing experiments with numerical simulations.
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik
Beitrag (Sammelband oder Tagungsband)

  • Peter Sperber
  • M. Weidner
  • A. Penzkofer

S0-Sn Two-Photon Absorption Dynamics of Rhodamine Dyes

In: Ultrafast Phenomena V. Proceedings of the fifth OSA topical meeting (Springer Series in Chemical Physics) pg. 469.

Berlin; New York

  • (1986)
  • Hochschulleitung und -einrichtungen
  • Elektrotechnik und Medientechnik