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Proceedings Paper

Superlong-radius measurement
Author(s): Jingchi Yu; Xiafei Sun; Peiji Guo
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Paper Abstract

Using interferometer to test an optical component with super- long radius will face two very difficult problems: how to measure the radius precisely and how to avoid air disturbance and vibration, especially for a convex surface. In order to solve these problems we design a cement doublet, which is combination of plano-convex and plano-concave lenses, as a compensator to generate super-long focal length. This cement doublet looks like a plane plate, but has very little optical power. Two cemented lenses are made of different optical glasses with very small differential of refraction index. This Compensator is inserted between the interferometer and the optical component to be tested. Advantages of above design are the distance between the interferometer and tested component can be shortened to a desired value and air disturbance and vibration can be reduced to an acceptable level. Only thing you should do is to control the refraction index difference tightly.

Paper Details

Date Published: 6 October 2000
PDF: 4 pages
Proc. SPIE 4231, Advanced Optical Manufacturing and Testing Technology 2000, (6 October 2000); doi: 10.1117/12.402817
Show Author Affiliations
Jingchi Yu, Soochow Univ. (China)
Xiafei Sun, Soochow Univ. (China)
Peiji Guo, Changchun Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 4231:
Advanced Optical Manufacturing and Testing Technology 2000
Li Yang; Harvey M. Pollicove; Qiming Xin; James C. Wyant, Editor(s)

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