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Proceedings Paper

A study of material removal response of various glasses in computer controlled sub-aperture polishing
Author(s): Sandeep Mishra; Raghvendra Singh; Amitava Ghosh
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Paper Abstract

Significant advances have been made in the field of fabrication of optical components over the years. While plano and spherical surfaces are polished mostly by full aperture polishers made of pitch or polyurethane pads, no such approach is possible for aspheric surfaces as polisher needs to conform to the changing local curvature of aspheric surface. For such aspheric and freeform surfaces sub aperture polishing is a very attractive option as it forms a small polishing spot over the surface of the optics and the path of this spot in multi axis configuration is precisely controlled by the computer. This polishing process follows a deterministic approach and material removal information is very much necessary to control surface form or surface accuracy of the optical component. Here we have carried out the polishing of several glass substrates to find out the response of various glass types to this polishing process.

Paper Details

Date Published: 15 June 2015
PDF: 4 pages
Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 96540O (15 June 2015); doi: 10.1117/12.2181620
Show Author Affiliations
Sandeep Mishra, Instruments Research & Development Establishment (India)
Raghvendra Singh, Instruments Research & Development Establishment (India)
Amitava Ghosh, Instruments Research & Development Establishment (India)


Published in SPIE Proceedings Vol. 9654:
International Conference on Optics and Photonics 2015
Kallol Bhattacharya, Editor(s)

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