Optical efficiency of MEMS deformable mirror for adaptive optics

Dongmei Cai; Jun Yao; Wenhan Jiang

doi:10.1117/12.810202

23 February 2009 Optical efficiency of MEMS deformable mirror for adaptive optics

Dongmei Cai, Jun Yao, Wenhan Jiang

Proceedings Volume 7209, MEMS Adaptive Optics III; 72090Q (2009) https://doi.org/10.1117/12.810202
Event: SPIE MOEMS-MEMS: Micro- and Nanofabrication, 2009, San Jose, California, United States

Abstract

MEMS deformable mirror (DM) has yet to be incorporated into a facility AO instrument especially for atmospheric compensation. Apart from these drawbacks such as limited stroke, reliability, its optical efficiency should also be concerted. The wavefront corrector in AO system should existing high optical efficiency especially atmospheric compensation under faint stars. However the MEMS DM fabricated by surface process must have etch holes in the surface of mirror. The diffraction results from etch holes decrease its optical efficiency. An MEMS deformable mirror is fabricated by commercial PolyMUMPs. There is array of etch holes to ensure that the sacrifice layer is released fully. The far field intensity distribution was simulated. The result has been analyzed and used to constructed a simple modal of the studied MEMS DM.

Citation Download Citation

Dongmei Cai, Jun Yao, and Wenhan Jiang "Optical efficiency of MEMS deformable mirror for adaptive optics", Proc. SPIE 7209, MEMS Adaptive Optics III, 72090Q (23 February 2009); https://doi.org/10.1117/12.810202

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