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Proceedings Paper

Using a long-wavelength (10.6-μm) interferometer to test a torus
Author(s): Zhishan Gao; Jinbang Chen; Lei Chen; Aiming Ge
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Paper Abstract

A torus is a kind of aspherical surface, different from quadratic rotary surface. It plays an important role in special optical systems. However, up to now there is no effective method to test its wavefront. In this paper, a method is proposed using long wavelength (10.6 micrometers ) IR interferometry to test a torus, whose curvature radii is different from submillimeter deducing to micrometer, the principle is also given. Then a example torus is tested in self-developed IR spherical interferometer. When this torus is placed in typical positions along the optical axis, some interferograms are shown. According to these interferograms the wavefront error and the difference of two radii can be obtained and shown in this paper.

Paper Details

Date Published: 5 August 1998
PDF: 5 pages
Proc. SPIE 3557, Current Developments in Optical Elements and Manufacturing, (5 August 1998); doi: 10.1117/12.318332
Show Author Affiliations
Zhishan Gao, Nanjing Univ. of Science and Technology (China)
Jinbang Chen, Nanjing Univ. of Science and Technology (China)
Lei Chen, Nanjing Univ. of Science and Technology (China)
Aiming Ge, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 3557:
Current Developments in Optical Elements and Manufacturing
Qiming Xin; Robert E. Parks, Editor(s)

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