11 October 2015 Fabrication of metal mirror modules for snap-together VIS telescopes
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Proceedings Volume 9633, Optifab 2015; 963313 (2015) https://doi.org/10.1117/12.2195897
Event: SPIE Optifab, 2015, Rochester, New York, United States
Abstract
The assembly effort of an optical system naturally relies on the degrees of freedom and the maximum allowable tolerances each optical surface introduces into the overall budget. Snap-together approaches traditionally can be regarded as attractive solutions for IR systems having moderate tolerances, where the required precision is achieved by simultaneously machining optical surfaces and mounting interfaces in a single machine setup. Recent improvements in manufacturing and metrology enable a transfer of the assembly approach to shorter wavelength applications, where sub-aperture figuring techniques are used in combination with suitable amorphous polishing layers to achieve the increased requirements on figure and finish. A further decrease of the assembly effort is gained by machining several optical surfaces on common mechanical substrates and fixing the relative position with uncertainties as low as the machine precision. The article presents the fabrication of large electroless nickel coated aluminum mirror modules having two functional freeform surfaces and references for metrology and system integration. The modules are part of an all metal anamorphic imaging telescope operating in the visual spectral range. Presented methods open up a rapid and reliable assembly of metal mirror based VIS telescopes to be used in ground and space based astronomy or remote sensing applications.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Matthias Beier, Matthias Beier, Johannes Hartung, Johannes Hartung, Jan Kinast, Jan Kinast, Andreas Gebhardt, Andreas Gebhardt, Frank Burmeister, Frank Burmeister, Uwe D. Zeitner, Uwe D. Zeitner, Stefan Risse, Stefan Risse, Ramona Eberhardt, Ramona Eberhardt, Andreas Tünnermann, Andreas Tünnermann, } "Fabrication of metal mirror modules for snap-together VIS telescopes", Proc. SPIE 9633, Optifab 2015, 963313 (11 October 2015); doi: 10.1117/12.2195897; https://doi.org/10.1117/12.2195897
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