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Proceedings Paper

Design of twin computer-generated hologram for absolute testing of aspheric surfaces
Author(s): Jie Feng; Chao Deng; Tingwen Xing
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Paper Abstract

Testing of aspheric surfaces by means of computer-generated holograms(CGHs)is well known. To perform an absolute test of rotationally symmetric aspheric surfaces, a specially designed computer-generated hologram (CGH) that reconstructs an aspherical wave as well as a spherical auxiliary wave. Since both phase functions have the same symmetry and their pattern is simultaneously encoded, we call this type of multiplex hologram a Twin-CGH. The spherical wave is used for calibration. The design principle of Twin-CGH is introduced in this paper. We mathematically analyze the Twin-CGH constructed by taking the phase corresponding to the linear combination of two weighted phase functions. We show that this Twin-CGH may be written as a new linear combination for the original phase functions with new weights. Then we absolutely test aspheric surfaces by Twin-CGH.

Paper Details

Date Published: 18 September 2014
PDF: 7 pages
Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 92821M (18 September 2014); doi: 10.1117/12.2068507
Show Author Affiliations
Jie Feng, Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Chao Deng, Institute of Optics and Electronics (China)
Tingwen Xing, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 9282:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Wei Gao, Editor(s)

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