Optical measurements of a prototype adaptive-optic secondary mirror

David L. Modisett; Hubert M. Martin

doi:10.1117/12.217733

25 August 1995 Optical measurements of a prototype adaptive-optic secondary mirror

David L. Modisett, Hubert M. Martin

Proceedings Volume 2534, Adaptive Optical Systems and Applications; (1995) https://doi.org/10.1117/12.217733
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

A prototype adaptive-optic secondary mirror consisting of a centrally located single fixed voice coil actuator and surrounded by 20 fixed point supports has been characterized optically. A phase-shifting interferometer was used to determine the static influence function and calibrate the capacitive sensor of the prototype secondary. A distance measuring interferometer sampling a single point on the secondary surface at 32 kHz was used to obtain time series data of the dynamic response of the optic. The system impulse response and transfer function were measured directly and the mechanical modes of the structure identified. Measurement philosophy, hardware, and test results are discussed.

Citation Download Citation

David L. Modisett and Hubert M. Martin "Optical measurements of a prototype adaptive-optic secondary mirror", Proc. SPIE 2534, Adaptive Optical Systems and Applications, (25 August 1995); https://doi.org/10.1117/12.217733

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