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Proceedings Paper

Experimental investigation of precision grinding oriented to achieve high process efficiency for large and middle-scale optic
Author(s): Ping Li; Tan Jin; Zongfu Guo; Ange Lu; Meina Qu
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Paper Abstract

High efficiency machining of large precision optical surfaces is a challenging task for researchers and engineers worldwide. The higher form accuracy and lower subsurface damage helps to significantly reduce the cycle time for the following polishing process, save the cost of production, and provide a strong enabling technology to support the large telescope and laser energy fusion projects. In this paper, employing an Infeed Grinding (IG) mode with a rotary table and a cup wheel, a multi stage grinding process chain, as well as precision compensation technology, a Φ300mm diameter plano mirror is ground by the Schneider Surfacing Center SCG 600 that delivers a new level of quality and accuracy when grinding such large flats. Results show a PV form error of Pt<2 μm, the surface roughness Ra<30 nm and Rz<180 nm, with subsurface damage <20 μm, and a material removal rates of up to 383.2 mm3/s.

Paper Details

Date Published: 28 October 2016
PDF: 9 pages
Proc. SPIE 9683, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 968328 (28 October 2016); doi: 10.1117/12.2242822
Show Author Affiliations
Ping Li, Hunan Univ. (China)
Tan Jin, Hunan Univ. (China)
Zongfu Guo, Hunan Univ. (China)
Ange Lu, Hunan Univ. (China)
Meina Qu, Hunan Univ. (China)


Published in SPIE Proceedings Vol. 9683:
8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Wenhan Jiang; Li Yang; Oltmann Riemer; Shengyi Li; Yongjian Wan, Editor(s)

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