A study of material removal response of various glasses in computer controlled sub-aperture polishing

Sandeep Mishra; Raghvendra Singh; Amitava Ghosh

doi:10.1117/12.2181620

15 June 2015 A study of material removal response of various glasses in computer controlled sub-aperture polishing

Sandeep Mishra, Raghvendra Singh, Amitava Ghosh

Proceedings Volume 9654, International Conference on Optics and Photonics 2015; 96540O (2015) https://doi.org/10.1117/12.2181620
Event: International Conference on Optics and Photonics 2015, 2015, Kolkata, India

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.

Citation Download Citation

Sandeep Mishra, Raghvendra Singh, and Amitava Ghosh "A study of material removal response of various glasses in computer controlled sub-aperture polishing", Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 96540O (15 June 2015); https://doi.org/10.1117/12.2181620

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