Digitalization measurement of large radius of curvature by noncontact Newton's rings

Yongying Yang; Yongmo Zhou; Hangxing Wu

doi:10.1117/12.402826

6 October 2000 Digitalization measurement of large radius of curvature by noncontact Newton's rings

Yongying Yang, Yongmo Zhou, Hangxing Wu

Proceedings Volume 4231, Advanced Optical Manufacturing and Testing Technology 2000; (2000) https://doi.org/10.1117/12.402826
Event: International Topical Symposium on Advanced Optical Manufacturing and Testing Technology, 2000, Chengdu, China

Abstract

A Digitalization measurement method of large radius of curvature is presented in this paper. Non-contact Newton's rings are formed by an interferometer. The interferogram is imaged in CCD array. The scale of image pixels corresponding to Newton's rings that related to the radius of curvature is obtained by scanning fringes or other optical methods. The radius of curvature of spherical surface detected that can be both convex and concave is up to 25 Meter. The accuracy of measurement is better than 0.3 percent.

Citation Download Citation

Yongying Yang, Yongmo Zhou, and Hangxing Wu "Digitalization measurement of large radius of curvature by noncontact Newton's rings", Proc. SPIE 4231, Advanced Optical Manufacturing and Testing Technology 2000, (6 October 2000); https://doi.org/10.1117/12.402826

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