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Proceedings Paper

Test of an off-axis asphere by subaperture stitching interferometry
Author(s): Xiao-kun Wang; Li-gong Zheng; Bin-zhi Zhang; Rui-Gang Li; Di Fan; Wei-jie Deng; Xu Wang; Feng Zhang; Zhong-yu Zhang; Xue-jun Zhang
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Paper Abstract

A new method combined subaperture stitching with interferometry(SSI) is introduced. It can test large and off-axis aspheric surfaces without the aid of other null optics. In this paper the basic principle and theory of the technique are analyzed. The synthetical optimization stitching model and effective stitching algorithm are established based on homogeneous coordinates transformation and simultaneous least-squares method. The software of SSI is devised and the prototype for testing of large aspheres by SSI is designed and developed. An off-axis asphere with the aperture of 376mm×188mm is tested by this method. For comparison and validation, the asphere is also tested by null compensation.The synthesized surface profile is consistent to that ofthe entire surface from null test; and the difference of PV and RMS error between them is 0.047 λ and 0.006 λ, respectively. So it provides another quantitative measurement for testing large aspheric surfaces and off-axis aspheres besides null-compensation.

Paper Details

Date Published: 20 May 2009
PDF: 6 pages
Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72832J (20 May 2009); doi: 10.1117/12.828716
Show Author Affiliations
Xiao-kun Wang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Li-gong Zheng, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Bin-zhi Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Graduate School of the Chinese Academy of Sciences (China)
Rui-Gang Li, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Di Fan, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Wei-jie Deng, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Graduate School of the Chinese Academy of Sciences (China)
Xu Wang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Graduate School of the Chinese Academy of Sciences (China)
Feng Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Zhong-yu Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Xue-jun Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)


Published in SPIE Proceedings Vol. 7283:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; James C. Wyant; Robert A. Smythe; Hexin Wang, Editor(s)

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