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Long-term stable active mount for reflective optics

: Reinlein, C.; Brady, A.; Damm, C.; Mohaupt, M.; Kamm, A.; Lange, N.; Goy, M.


Navarro, R. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II : 26 June-1 July 2016, Edinburgh, United Kingdom
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9912)
ISBN: 978-1-5106-0203-8
ISBN: 978-1-5106-0204-5
Paper 99121N
Conference "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation" <2, 2016, Edinburgh>
Conference Paper
Fraunhofer IOF ()

We report on the development of an active mount with an orthogonal actuator matrix offering a stable shape optimization for gratings or mirrors. We introduce the actuator distribution and calculate the accessible Zernike polynomials from their actuator influence function. Experimental tests show the capability of the device to compensate for aberrations of grating substrates as we report measurements of a 110x105 mm2 and 220x210 mm2 device With these devices, we evaluate the position depending aberrations, long-term stability shape results, and temperature-induced shape variations. Therewith we will discuss potential applications in space telescopes and Earth-based facilities where long-term stability is mandatory.