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Proceedings Article

Computer-controlled figuring and testing

[+] Author Affiliations
Tapio K. Korhonen, Timo Lappalainen

Turku Univ. (Finland)

Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, 691 (July 1, 1990); doi:10.1117/12.19236
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From Conference Volume 1236

  • Advanced Technology Optical Telescopes IV
  • Lawrence D. Barr
  • Tucson, AZ | February 11, 1990


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.

© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Tapio K. Korhonen and Timo Lappalainen
"Computer-controlled figuring and testing", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, 691 (July 1, 1990); doi:10.1117/12.19236; http://dx.doi.org/10.1117/12.19236

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