Christian Schopf, M.B.A.

Operative Leitung

Operative Gesamtleitung Technologie Campus

ITC2 1.54

0991/3615-308


Lecture
  • Christian Schopf
10 Jahre Technologie Campus der THD: Wissenschaft und Innovation im ländlichen Raum
  • 2019
Lecture
  • Christian Schopf
10 Jahre Technologie Campus der THD: Wissenschaft und Innovation im ländlichen Raum
  • 2019
Lecture
  • Christian Schopf
  • Florian Schneider
  • Rolf Rascher
ArenA – Foi: Erprobung des ADAPT-Polierwerkzeugs Posterpräsentation
  • 2018
Contribution
  • Johannes Liebl
  • Christian Schopf
  • Rolf Rascher
DefGO
  • 2018

DOI: 10.1117/12.2318704

The manufacturing of optical lenses has various steps. Generally, the manufacturing can be split up into the following steps: the workpiece is pre-ground with a coarse tool; it is then fine-ground with a finer tool. As the final polishing is a demanding and time-consuming process that cannot manage large removal rations not can it equalise rough shape errors, the starting quality and surface quality needs to be as high as possible. According to the current state of technology, ground lenses must be measured with tactile measuring techniques in order to detect shape errors. This is timeconsuming and expensive, and only two dimensional profiles can be measured. DefGO’s project objective is to introduce deflectometry as a new, three dimensional lens measuring standard. A problem with the application of deflectometry is that the object to be measured has to reflect enough light, which is not the case for ground glass with rough surfaces. DefGO’s solution is to wet the lens with a fluid to create a closed reflecting surface.
Lecture
  • Christian Schopf
  • Florian Schneider
  • Rolf Rascher
ArenA – Foi: Erprobung des ADAPT-Polierwerkzeugs Posterpräsentation
  • 2018
Contribution
  • Johannes Liebl
  • Christian Schopf
  • Rolf Rascher
DefGO
  • 2018

DOI: 10.1117/12.2318704

The manufacturing of optical lenses has various steps. Generally, the manufacturing can be split up into the following steps: the workpiece is pre-ground with a coarse tool; it is then fine-ground with a finer tool. As the final polishing is a demanding and time-consuming process that cannot manage large removal rations not can it equalise rough shape errors, the starting quality and surface quality needs to be as high as possible. According to the current state of technology, ground lenses must be measured with tactile measuring techniques in order to detect shape errors. This is timeconsuming and expensive, and only two dimensional profiles can be measured. DefGO’s project objective is to introduce deflectometry as a new, three dimensional lens measuring standard. A problem with the application of deflectometry is that the object to be measured has to reflect enough light, which is not the case for ground glass with rough surfaces. DefGO’s solution is to wet the lens with a fluid to create a closed reflecting surface.
Lecture
  • Christian Schopf
Cheap and fast measuring roughness on big surfaces with an imprint method Posterpräsentation
  • 2017
Lecture
  • Christian Schopf
Cheap and fast measuring roughness on big surfaces with an imprint method Posterpräsentation
  • 2017
Contribution
  • Christian Schopf
  • Rolf Rascher
  • Johannes Liebl
Cheap and fast measuring roughness on big surfaces with an imprint method
  • 2017
Contribution
  • Christian Schopf
  • Rolf Rascher
  • Johannes Liebl
Cheap and fast measuring roughness on big surfaces with an imprint method
  • 2017
Lecture
  • Christian Schopf
  • Rolf Rascher
Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant
  • 2016
Contribution
  • Christian Schopf
  • Rolf Rascher
Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant
  • 2016

DOI: 10.1117/12.2257106

The process of ultrasonic machining is especially used for brittle hard materials as the additional ultrasonic vibration of the tool at high frequencies and low amplitudes acts like a hammer on the surface. With this technology it is possible to drill holes with lower forces, therefor the machining can be done faster and the worktime is much less than conventionally. A three-axis dynamometer was used to measure the forces, which act between the tool and the sample part. A focus is set on the sharpness of the tool. The results of a test series are based on the Sauer Ultrasonic Grinding Centre. On the same machine it is possible to drill holes in the conventional way. Additional to the ultasonic Input the type an concentration of coolant is important for the Drilling-force. In the test there were three different coolant and three different concentrations tested. The combination of ultrasonic vibration and the right coolant and concentration is the best way to reduce the Forces. Another positive effect is, that lower drilling-forces produce smaller chipping on the edge of the hole. The way to reduce the forces and chipping is the main issue of this paper.
Lecture
  • Christian Schopf
  • Rolf Rascher
Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant
  • 2016
Contribution
  • Christian Schopf
  • Rolf Rascher
Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant
  • 2016

DOI: 10.1117/12.2257106

The process of ultrasonic machining is especially used for brittle hard materials as the additional ultrasonic vibration of the tool at high frequencies and low amplitudes acts like a hammer on the surface. With this technology it is possible to drill holes with lower forces, therefor the machining can be done faster and the worktime is much less than conventionally. A three-axis dynamometer was used to measure the forces, which act between the tool and the sample part. A focus is set on the sharpness of the tool. The results of a test series are based on the Sauer Ultrasonic Grinding Centre. On the same machine it is possible to drill holes in the conventional way. Additional to the ultasonic Input the type an concentration of coolant is important for the Drilling-force. In the test there were three different coolant and three different concentrations tested. The combination of ultrasonic vibration and the right coolant and concentration is the best way to reduce the Forces. Another positive effect is, that lower drilling-forces produce smaller chipping on the edge of the hole. The way to reduce the forces and chipping is the main issue of this paper.
Lecture
  • Rolf Rascher
  • Christine Wünsche
  • Christian Schopf
Aspects in laser polishing of precision optical components
  • 2016
Lecture
  • Rolf Rascher
  • Christine Wünsche
  • Christian Schopf
Aspects in laser polishing of precision optical components
  • 2016
Lecture
  • Heiko Biskup
  • Christian Schopf
  • Rolf Rascher
Surface roughness testing below 0.5 nm Sq Measuring of Sub-Nanometer Surface Texture by White-Light Interferometry
  • 2015
Lecture
  • Heiko Biskup
  • Christian Schopf
  • Rolf Rascher
Surface roughness testing below 0.5 nm Sq Measuring of Sub-Nanometer Surface Texture by White-Light Interferometry
  • 2015
Lecture
  • Christian Schopf
Requirements for optical Freeforms
  • 2014
Lecture
  • Christian Schopf
Requirements for optical Freeforms
  • 2014
Lecture
  • Roland Maurer
  • Christian Schopf
Determination of a suitable parameter field for the active fluid jet polishing process
  • 2013
JournalArticle
  • Christian Schopf
  • Rolf Rascher
  • Christine Wünsche
Rauhigkeitsmessungen an großen und schwer zugänglichen Bauteilen
  • 2013
JournalArticle
  • Christian Schopf
  • Rolf Rascher
  • Christine Wünsche
Rauhigkeitsmessungen an großen und schwer zugänglichen Bauteilen
  • 2013
Lecture
  • Roland Maurer
  • Christian Schopf
Determination of a suitable parameter field for the active fluid jet polishing process
  • 2013
Lecture
  • Christian Schopf
  • Christine Wünsche
Projekt DuV Posterpräsentation
  • 2012
Lecture
  • R. Neubert
  • L. Grunwaldt
  • A. Hamdorf
  • Christian Schopf
Testing a 20 cm Diameter Open Reflector
  • 2012
Lecture
  • Christian Schopf
  • Christine Wünsche
Projekt 3P-Fertig Posterpräsentation
  • 2012
Lecture
  • R. Neubert
  • L. Grunwaldt
  • A. Hamdorf
  • Christian Schopf
Testing a 20 cm Diameter Open Reflector
  • 2012
Lecture
  • Christian Schopf
  • Christine Wünsche
Projekt 3P-Fertig Posterpräsentation
  • 2012
Lecture
  • Christian Schopf
  • Christine Wünsche
Projekt DuV Posterpräsentation
  • 2012
Lecture
  • R. Neubert
  • L. Grunwaldt
  • Christian Schopf
  • Engelbert Hofbauer
  • et al.
Single Open Reflector for MEO/GNSS type Satellite. A status report
  • 2011
Lecture
  • Christian Schopf
  • Christine Wünsche
Herstellung von Präszisionsoptiken mit Formabweichung kleiner L/50
  • 2011
Lecture
  • Christian Schopf
  • Christine Wünsche
Herstellung von Präszisionsoptiken mit Formabweichung kleiner L/50
  • 2011
Lecture
  • R. Neubert
  • L. Grunwaldt
  • Christian Schopf
  • Engelbert Hofbauer
  • et al.
Single Open Reflector for MEO/GNSS type Satellite. A status report
  • 2011
Lecture
  • Christian Schopf
  • Rolf Rascher
Ultraschalluntersütztes Bearbeiten optischer Materialien
  • 2010
Lecture
  • Christian Schopf
  • Rolf Rascher
Ultraschalluntersütztes Bearbeiten optischer Materialien
  • 2010
Contribution
  • Christian Schopf
  • Rolf Rascher
  • Peter Sperber
Vor- und Nachteile der Ultraschalltechnologie beim Schleifen von optischen Flächen
  • 2010
JournalArticle
  • S. Back
  • Thomas Stirner
  • Christian Schopf
Prozessstabilität beim Schleifen mit Ultraschall verbessern
  • 2010
Zur Prozessverbesserung bei der Ultraschallbearbeitung optischer Flächen wurden eine Versuchsplanung und eine statistische Analyse der Messdaten durchgeführt. Somit können Wechselwirkungen zwischen den Parametern vorhergesagt und die Stabilität des Prozesses verbessert werden.
JournalArticle
  • S. Back
  • Thomas Stirner
  • Christian Schopf
Prozessstabilität beim Schleifen mit Ultraschall verbessern
  • 2010
Zur Prozessverbesserung bei der Ultraschallbearbeitung optischer Flächen wurden eine Versuchsplanung und eine statistische Analyse der Messdaten durchgeführt. Somit können Wechselwirkungen zwischen den Parametern vorhergesagt und die Stabilität des Prozesses verbessert werden.
Contribution
  • Christian Schopf
  • Rolf Rascher
  • Peter Sperber
Vor- und Nachteile der Ultraschalltechnologie beim Schleifen von optischen Flächen
  • 2010
Lecture
  • Christian Schopf
  • Rolf Rascher
  • Peter Sperber
Vor- und Nachteile der Ultraschalltechnologie beim Schleifen von optischen Flächen
  • 2010
Lecture
  • Christian Schopf
  • Peter Sperber
  • Rolf Rascher
Forschung für die Industrie im Technologiecampus Teisnach, Hochschule für Angewandte Wissenschaften – FH Deggendorf
  • 2010
Lecture
  • Christian Schopf
  • Rolf Rascher
  • Peter Sperber
Vor- und Nachteile der Ultraschalltechnologie beim Schleifen von optischen Flächen
  • 2010
Lecture
  • Christian Schopf
  • Peter Sperber
  • Rolf Rascher
Forschung für die Industrie im Technologiecampus Teisnach, Hochschule für Angewandte Wissenschaften – FH Deggendorf
  • 2010
Contribution
  • Christian Schopf
  • Rolf Rascher
Ultrasonic assisted drilling of brittle hard materials
  • 2009
Contribution
  • Christian Schopf
  • Rolf Rascher
Ultrasonic assisted drilling of brittle hard materials
  • 2009
Lecture
  • K. Fathima
  • Christian Schopf
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Precision finishing of aspherical optical components using ELID grinding
  • 2008
Lecture
  • K. Fathima
  • Christian Schopf
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Precision finishing of aspherical optical components using ELID grinding
  • 2008
Contribution
  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Ultraschallunterstütztes Schleifen von Linsen
  • 2008
Contribution
  • K. Fathima
  • Christian Schopf
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Precision finishing of aspherical optical components using ELID grinding
  • 2008
Lecture
  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Ultraschallunterstütztes Schleifen von Linsen
  • 2008
Lecture
  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Ultraschallunterstütztes Schleifen von Linsen
  • 2008
Contribution
  • Christian Schopf
  • K. Fathima
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Ultraschallunterstütztes Schleifen von Linsen
  • 2008
Contribution
  • K. Fathima
  • Christian Schopf
  • Andreas Geiss
  • Markus Schinhärl
  • Christian Vogt
  • Rolf Rascher
  • Peter Sperber
Precision finishing of aspherical optical components using ELID grinding
  • 2008