Fiber point diffraction interferometer in measurement of spherical lens

Shuo Wu; Tao geng Zhou; Jia ming Lin; Lin feng Chen; Liang Nie; Ding guo Sha

doi:10.1117/12.791112

12 March 2008 Fiber point diffraction interferometer in measurement of spherical lens

Shuo Wu, Tao geng Zhou, Jia ming Lin, Lin feng Chen, Liang Nie, Ding guo Sha

Proceedings Volume 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing; 662415 (2008) https://doi.org/10.1117/12.791112
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

An advanced fiber point diffraction interferometer (FPDI) is built for measuring spherical mirror surface and spherical lens wave front aberration with high precision. This new interferometer is based on point diffraction technique. Using short coherence length laser as light source, the perfect spherical wave diffracts from fiber point resource as reference wave. And the spherical wave is interfered with object wave to achieve higher accuracy. A phase shifting point diffraction interferometer with one single-mode-optical-fiber is built for measuring concave spherical mirror surface. A concave spherical mirror is measured by the experimental facility. The interferograms are collected by CCD and analyzed by computer. The PV values and RMS values of resulted surface error are compared with the result acquired by digital wave front interferometer. The measured surface is fitted and represented by Zernike polynomials. The results compared with Zygo GPI interferometer are proximately the same. Finally the differences between them are discussed in detail. To measure the aberration of spherical lens, a two single-mode-optical-fibers point diffraction interferometer is built by adding another single mode optical fiber. A convex lens is measured. The interferograms is presented.

Citation Download Citation

Shuo Wu, Tao geng Zhou, Jia ming Lin, Lin feng Chen, Liang Nie, and Ding guo Sha "Fiber point diffraction interferometer in measurement of spherical lens", Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 662415 (12 March 2008); https://doi.org/10.1117/12.791112

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KEYWORDS

Spherical lenses

Wavefronts

Mirrors

Point diffraction interferometers

Diffraction

Interferometers

Photovoltaics

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