Michael Wagner

Wissenschaftlicher Mitarbeiter

Wissenschaftlicher Mitarbeiter

T 118

09923/80108-440

09923/80108-421


Contribution
  • Michael Wagner
  • Gerald Fütterer
Computer-aided beam path generation and assessment for Stevick-Paul telescopes
  • 2020

DOI: 10.1117/12.2564852

At Deggendorf Institute of Technology a student project is currently under way to build a Stevick-Paul telescope for astrophotography. An important step in the overall development procedure of each telescope is the design of a beam-path and ensuring its suitability under optical and engineering aspects. The students performed this process in a sequential manner by using several different computer programs (e.g. MATLAB, Zemax, Creo Parametric). To accelerate the beam path design process, a Python program to automate the major part of the design process with minimum human supervision was created. The input data of the python program consists of ranges of the desired characteristics of the Stevick-Paul telescope, such as focal lengths, primary mirror diameters and tilts etc., mirror thickness and mount geometries, as well as the specific type of camera. After setting the input, the program creates 2D cross-sections of beam paths according to the formulas of D. Stevick and may introduce a flat fold mirror to reduce the overall system size as well as improve the accessibility of the focus plane. The subsequent assessment routine checks against the susceptibility for stray light and performs a complex analysis of the available installation space to ensure sufficient mechanical tolerances. In this way, collisions between mirrors, mounts and cameras are avoided and obstructions of the beam path are prevented. At any stage, the program can produce graphical representations of the beam paths. In this paper the computer-aided design of a telescope beam path with a focal length of 2400 mm is demonstrated. During development of the software, a subset of folded Stevick-Paul telescopes, in which certain components are parallel, was found. This subset may be useful to simplify the alignment procedure. In conclusion, further refinement of the software is necessary, although the program is already a useful aid for certain aspects when creating a beam path design.
Contribution
  • Michael Wagner
  • Gerald Fütterer
Computer-aided beam path generation and assessment for Stevick-Paul telescopes
  • 2020

DOI: 10.1117/12.2564852

At Deggendorf Institute of Technology a student project is currently under way to build a Stevick-Paul telescope for astrophotography. An important step in the overall development procedure of each telescope is the design of a beam-path and ensuring its suitability under optical and engineering aspects. The students performed this process in a sequential manner by using several different computer programs (e.g. MATLAB, Zemax, Creo Parametric). To accelerate the beam path design process, a Python program to automate the major part of the design process with minimum human supervision was created. The input data of the python program consists of ranges of the desired characteristics of the Stevick-Paul telescope, such as focal lengths, primary mirror diameters and tilts etc., mirror thickness and mount geometries, as well as the specific type of camera. After setting the input, the program creates 2D cross-sections of beam paths according to the formulas of D. Stevick and may introduce a flat fold mirror to reduce the overall system size as well as improve the accessibility of the focus plane. The subsequent assessment routine checks against the susceptibility for stray light and performs a complex analysis of the available installation space to ensure sufficient mechanical tolerances. In this way, collisions between mirrors, mounts and cameras are avoided and obstructions of the beam path are prevented. At any stage, the program can produce graphical representations of the beam paths. In this paper the computer-aided design of a telescope beam path with a focal length of 2400 mm is demonstrated. During development of the software, a subset of folded Stevick-Paul telescopes, in which certain components are parallel, was found. This subset may be useful to simplify the alignment procedure. In conclusion, further refinement of the software is necessary, although the program is already a useful aid for certain aspects when creating a beam path design.
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
Four-Tilted-Mirror Telescope: Alignment and Stability Aspects
  • 2019
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
Alignment and thermal drift aspects of a four-tilted-mirror student project telescope
  • 2019

DOI: 10.1117/12.2530076

The Deggendorf Institute of Technology (DIT) and its Faculty of Applied Natural Sciences and Industrial engineering transfer a broad spectrum of knowledge to the students. The clarification of the interrelations that exist between seemingly isolated fields of knowledge is a permanent process. In order to put this into practice, a telescope construction project was started. The base of the in-house student project is the Technology Campus in Teisnach, which bundles capacities for process development, production and measurement of high-precision optics, including telescope optics. A first optical design, which is based on a subset of the parameter space published in 1989 by M. Brunn1, 2 (later built by D. Stevick as f/12-system3 ), made use of a primary mirror M1 with a diameter of 400 mm. An f/8-system provide a Strehl ratio SR ≥ 0.8 over an entire field of view of 0.7° deg. Even if this seems to be sufficient, manufacturing tolerances, adjustment tolerances, thermal drift and positional changes considerably reduce the Strehl ratio. In order to obtain reliable values of acceptable tolerances, statistical Monte Carlo analyses had been carried out. As consequences, the tube design was changed and the design of new mirror mounts started. This was done to achieve the required stiffness. The new tube designs, one based on carbon-fiber-reinforced polymer (CFRP) and one based on FeNi36, had been tested by using FEM analysis. In addition, the practicability of deep learning based aberration detection was tested. Zernike polynomials obtained by analyzing the star images with a Convolutional Neuronal Network (CNN). The current state of the development is described.
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
4-Schiefspiegel-Teleskop: Justage und Stabilitätsaspekte
  • 2019
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
Four-Tilted-Mirror Telescope: Alignment and Stability Aspects
  • 2019
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
Alignment and thermal drift aspects of a four-tilted-mirror student project telescope
  • 2019

DOI: 10.1117/12.2530076

The Deggendorf Institute of Technology (DIT) and its Faculty of Applied Natural Sciences and Industrial engineering transfer a broad spectrum of knowledge to the students. The clarification of the interrelations that exist between seemingly isolated fields of knowledge is a permanent process. In order to put this into practice, a telescope construction project was started. The base of the in-house student project is the Technology Campus in Teisnach, which bundles capacities for process development, production and measurement of high-precision optics, including telescope optics. A first optical design, which is based on a subset of the parameter space published in 1989 by M. Brunn1, 2 (later built by D. Stevick as f/12-system3 ), made use of a primary mirror M1 with a diameter of 400 mm. An f/8-system provide a Strehl ratio SR ≥ 0.8 over an entire field of view of 0.7° deg. Even if this seems to be sufficient, manufacturing tolerances, adjustment tolerances, thermal drift and positional changes considerably reduce the Strehl ratio. In order to obtain reliable values of acceptable tolerances, statistical Monte Carlo analyses had been carried out. As consequences, the tube design was changed and the design of new mirror mounts started. This was done to achieve the required stiffness. The new tube designs, one based on carbon-fiber-reinforced polymer (CFRP) and one based on FeNi36, had been tested by using FEM analysis. In addition, the practicability of deep learning based aberration detection was tested. Zernike polynomials obtained by analyzing the star images with a Convolutional Neuronal Network (CNN). The current state of the development is described.
Contribution
  • Gerald Fütterer
  • Michael Wagner
  • Lucas Bauer
  • Simon Wittl
4-Schiefspiegel-Teleskop: Justage und Stabilitätsaspekte
  • 2019
Contribution
  • Amir Samiee
  • J. Sahu
  • Nicolas Tiefnig
  • Michael Wagner
  • A. Baumgartner
  • László Juhász
Model-Driven Engineering in Education
  • 2018
Lecture
  • Amir Samiee
  • J. Sahu
  • Nicolas Tiefnig
  • Michael Wagner
  • A. Baumgartner
  • László Juhász
Model-Driven Engineering in Education
  • 2018
Lecture
  • László Juhász
  • J. Sahu
  • Amir Samiee
  • Nicolas Tiefnig
  • Michael Wagner
Model-Driven Engineering in Education: Position Control of an Electronic Throttle Valve
  • 2018
Lecture
  • László Juhász
  • J. Sahu
  • Amir Samiee
  • Nicolas Tiefnig
  • Michael Wagner
Model-Driven Engineering in Education: Position Control of an Electronic Throttle Valve
  • 2018
Contribution
  • Amir Samiee
  • J. Sahu
  • Nicolas Tiefnig
  • Michael Wagner
  • A. Baumgartner
  • László Juhász
Model-Driven Engineering in Education
  • 2018
Lecture
  • Amir Samiee
  • J. Sahu
  • Nicolas Tiefnig
  • Michael Wagner
  • A. Baumgartner
  • László Juhász
Model-Driven Engineering in Education
  • 2018