Vibration and shock testing of a 50 mm aperture unimorph deformable mirror
- 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.
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| Author: | Sinje Leitz, Maximilian Gerhards, Sven Verpoort, Ulrich Wittrock, Maximilian Freudling, Andreas Grzesik, Markus Erhard, Pascal Hallibert |
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| URN: | urn:nbn:de:hbz:836-opus-137401 |
| URL: | https://icso2020.com/ |
| DOI: | https://doi.org/10.25974/fhms-13740 |
| DOI of original publication: | https://doi/org/https://doi.org/10.1117/12.2599796 |
| Parent Title (English): | Proceedings of the International Conference on Space Optics (ICSO) |
| Document Type: | Conference Proceeding |
| Language: | English |
| Date of Publication (online): | 2021/05/06 |
| Date of first Publication: | 2021/03/31 |
| Provider of the Publication Server: | FH Münster - University of Applied Sciences |
| Creating Corporation: | ESA/ESTEC, Noordwijk |
| Release Date: | 2021/05/06 |
| Tag: | active optics; adaptive optics; deformable mirror; space telescopes; vibration damping |
| Volume: | 11852 |
| First Page: | 118524N |
| Faculties: | Physikingenieurwesen (PHY) |
| Publication list: | Wittrock, Ulrich |
| Licence (German): |  Zweitveroeffentlichung |