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Proceedings Paper

Research on technology of digital knife-edge test
Author(s): Jun Zhang; Rong-zhu Zhang; Bang-wei Cai; Panlong Liu
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Paper Abstract

In order to measure the quantitative surface characteristics of large aperture optics conveniently, a digital knife-edge is formed based on the combination of traditional knife-edge, CCD image processing and computer aided calculation, which includes knife-edge positioning with image processing and introduces parameter PSD to describe frequency spectrum. Quantitative digital measurement of knife-edge is realized and surface characteristics of &nullset;150mm and &nullset;125mm spherical mirror is obtained with an accuracy up to 0.12λ(λ=532nm). In the meantime, the testing error, especially the tilt error is analyzed. Compared with testing results of interferometer, the digital knife-edge testing technology is verified available and the data useful for calculating geometric aberration and provides theoretical bases for surface modifying.

Paper Details

Date Published: 19 May 2006
PDF: 5 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61500M (19 May 2006); doi: 10.1117/12.678088
Show Author Affiliations
Jun Zhang, Sichuan Univ. (China)
Rong-zhu Zhang, Sichuan Univ. (China)
Bang-wei Cai, Sichuan Univ. (China)
Panlong Liu, Sichuan Univ. (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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