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Proceedings Paper

Ultra-precision cutting of Fresnel lenses on single crystal germanium and the machining processing analysis
Author(s): Yufeng Fan; Yongjian Zhu; Weiqing Pan
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Paper Abstract

Single crystal germanium is used in infrared spectroscopes and other optical equipment as an excellent infrared optical material. The development of germanium Fresnel lenses not only improves the optical imaging quality but also enables the miniaturization of optical systems. In a previous work, a Fresnel lens with precise curvatures, sharp edges and precise cross-sectional profiles were fabricated. However, sometimes, microcracks will occur to the edge of grooves when the wear of the diamond tool is large in the machining process. In the present work, in order to minimize the effect of the tool tip wear to the groove edge of Fresnel lens, a novel machining process and machining conditions are proposed for fabricating a high-precision Fresnel lens.

Paper Details

Date Published: 7 October 2010
PDF: 5 pages
Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 76550R (7 October 2010); doi: 10.1117/12.866709
Show Author Affiliations
Yufeng Fan, Zhejiang Univ. of Science and Technology (China)
Yongjian Zhu, Zhejiang Univ. of Science and Technology (China)
Weiqing Pan, Zhejiang Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7655:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Yoshiharu Namba; David D. Walker; Shengyi Li, Editor(s)

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