Measurement of optical surfaces with knife edge method

Hongwei Jing; Bin Fan; Shibin Wu; Fan Wu; Tianquan Fan

doi:10.1117/12.783786

17 January 2008 Measurement of optical surfaces with knife edge method

Hongwei Jing, Bin Fan, Shibin Wu, Fan Wu, Tianquan Fan

Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 67235L (2008) https://doi.org/10.1117/12.783786
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

A method that upgrades the knife edge tester from a qualitative tester to a quantitative one was introduced in this paper. Moving the knife edge tester back and forth in the focus of the mirror, the variations at the center of curverture of annuluses of the mirror can be got. Using mathematic method, these variations of the center of curverture can be calculated as the deviations of real surface to perfect surface. An experiment has been done by using the method. The calculated deviations of the optical surface was compared with the results measured by Form Talysurf PGI 1240 from Taylor Hobson. Two-measurement results show resemblance.

Citation Download Citation

Hongwei Jing, Bin Fan, Shibin Wu, Fan Wu, and Tianquan Fan "Measurement of optical surfaces with knife edge method", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67235L (17 January 2008); https://doi.org/10.1117/12.783786

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