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Proceedings Paper

Computer-controlled figuring and testing
Author(s): Tapio K. Korhonen; Timo Lappalainen
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Paper Abstract

Technology developed for computer-controlled mirror manufacturing is described. The polishing tool is equipped with electromagnetic force actuators to regulate the local polishing forces according to the measured mirror errors. Optical testing with the interferometric modification of the Hartmann test and a CCD-camera as a detector allow accurate and fast measurement with high sampling frequency. Air turbulence and vibration effects are minimized in the workshop which is blasted into the bedrock and equipped with good thermal insulation.

Paper Details

Date Published: 1 July 1990
PDF: 4 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19236
Show Author Affiliations
Tapio K. Korhonen, Turku Univ. (Finland)
Timo Lappalainen, Turku Univ. (Finland)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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