TY  - CONF
A1  - Leitz, Sinje
A1  - Gerhards, Maximilian
A1  - Verpoort, Sven
A1  - Wittrock, Ulrich
A1  - Freudling, Maximilian
A1  - Grzesik, Andreas
A1  - Erhard, Markus
A1  - Hallibert, Pascal
T1  - Vibration and shock testing of a 50 mm aperture unimorph deformable mirror
T2  - Proceedings of the International Conference on Space Optics (ICSO)
N2  - We present our latest results on a refined unimorph deformable mirror which was developed in the frame of the ESA GSTP activity ”Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains”. The identified baseline concept with the soft piezoceramic material PIC151 successfully sustained all vibration requirements (17.8 gRMS random and 20 g sine) and shock testing (300 g SRS). We cover the mirror design development which reduces the stress in the brittle piezo-ceramic by 90 % compared to the design from
a former GSTP activity. We briefly address the optical characterization of the deformable mirror, namely the achieved Zernike amplitudes as well as the unpowered surface deformation (1.7 µm) and active flattening (12.3 nmRMS). The mirror produces low-order Zernike modes with a stroke of several tens of micrometer over a correction aperture of 50 mm, which makes the mirror a versatile tool for space telescopes.
KW  - active optics
KW  - adaptive optics
KW  - deformable mirror
KW  - vibration damping
KW  - space telescopes
Y1  - 2021
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/13740
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:836-opus-137401
UR  - https://icso2020.com/
VL  - 11852
SP  - 118524N
ER  -