Active multimodal control of a floppy telescope structure

Details Active multimodal control of a floppy telescope structure Active multimodal control of a floppy telescope structure

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4825...74b&link_type=abstract

High-Resolution Wavefront Control: Methods, Devices, and Applications IV. Edited by Gonglewski, John D.; Vorontsov, Mikhail A.;

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Scientific paper

Telescope structures are typically required to attain a certain degree of mechanical rigidity in order to achieve the desired optical performance goals, yet there are many applications where weight is either at a premium or local conditions exist that pre-empt optimal mechanical stability requirements. What is needed is a system which can sense and compensate for the opto-mechanical instabilities and correct them in real-time, preferably without "stealing" light from the optical system. We propose using tiny MEMS-based inertial reference sensors to measure the structural dynamics, and, using an appropriate model and coordinate transformations, correct in real-time the tip/tilt, focus, and possibly higher order errors of the optical system aberrations using MEMS-based deformable mirrors and/or our own tip/tilt + piston mirrors.

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