Optical measurements of a prototype adaptive-optic secondary mirror

Details Optical measurements of a prototype adaptive-optic secondary mirror Optical measurements of a prototype adaptive-optic secondary mirror

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2534..140m&link_type=abstract

Proc. SPIE Vol. 2534, p. 140-149, Adaptive Optical Systems and Applications, Robert K. Tyson; Robert Q. Fugate; Eds.

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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.

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