Automated mirror figuring using dynamic control of polishing forces

Tapio K. Korhonen; Timo Lappalainen; Aimo K. Sillanpaa

doi:10.1117/12.167972

1 February 1994 Automated mirror figuring using dynamic control of polishing forces

Tapio K. Korhonen, Timo Lappalainen, Aimo K. Sillanpaa

Proceedings Volume 1994, Advanced Optical Manufacturing and Testing IV; (1994) https://doi.org/10.1117/12.167972
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Tapio K. Korhonen, Timo Lappalainen, and Aimo K. Sillanpaa "Automated mirror figuring using dynamic control of polishing forces", Proc. SPIE 1994, Advanced Optical Manufacturing and Testing IV, (1 February 1994); https://doi.org/10.1117/12.167972

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