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Proceedings Paper

Computer-controlled optical surfacing for off-axis aspheric mirrors
Author(s): Jerrold Zimmerman
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Paper Abstract

A computer-controlled optical surface (CCOS) process has been developed that is in routine use for fabricating off-axis and centered aspheric mirrors. The CCOS process effects surface removal by moving a relatively small tool over the mirror surface in a path covering the entire surface. The removal is computed by the convolution of the tool work function with the path of the tool over the mirror surface. The combination of CCOS with microgrinding (grinding with fine tool over the mirror surface. The combination of CCOS with microgrinding (grinding with fine diamond powders which produce a specular surface) allows interferometric testing at an early stage of the process. Surface figure accuracies better than 20 nm rms and finishes better than 10 A are currently achieved.

Paper Details

Date Published: 1 July 1990
PDF: 6 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19182
Show Author Affiliations
Jerrold Zimmerman, Litton Itek Optical Systems (United States)


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

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