Automated mirror figuring using dynamic control of polishing forces

Details Automated mirror figuring using dynamic control of polishing forces Automated mirror figuring using dynamic control of polishing forces

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.1994..225k&link_type=abstract

Proc. SPIE Vol. 1994, p. 225-231, Advanced Optical Manufacturing and Testing IV, Victor J. Doherty; Ed.

Computer Science

1

Scientific paper

Computer-controlled methods have been applied for figuring two telescope mirrors of 1.25 m in diameter to a very high optical quality. Figuring and testing are performed in a closed loop scheme. The polishing tool comprises several non-rotating subtools in a linear array. The subtools are equipped with force actuators to regulate dynamically the polishing forces on the basis of the mirror metrology results. Fast and continuous convergence of the mirror surface accuracy has been achieved. A discussion is presented of the applicability of the developed methods for manufacturing very large mirrors.

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