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Proceedings Paper

Automated mirror figuring using dynamic control of polishing forces
Author(s): Tapio K. Korhonen; Timo Lappalainen; Aimo K. Sillanpaa
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Paper 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.

Paper Details

Date Published: 1 February 1994
PDF: 7 pages
Proc. SPIE 1994, Advanced Optical Manufacturing and Testing IV, (1 February 1994); doi: 10.1117/12.167972
Show Author Affiliations
Tapio K. Korhonen, OPTEON Oy (Finland)
Timo Lappalainen, OPTEON Oy (Finland)
Aimo K. Sillanpaa, OPTEON Oy (Finland)


Published in SPIE Proceedings Vol. 1994:
Advanced Optical Manufacturing and Testing IV
Victor J. Doherty, Editor(s)

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