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1 July 1990 Computer-controlled optical surfacing for off-axis aspheric mirrors
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jerrold Zimmerman "Computer-controlled optical surfacing for off-axis aspheric mirrors", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19182
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