Fabrication of optical surfaces with low subsurface damage using a float polishing process

David W. Reicher; C. F. Kranenberg; R. S. Stowell; Kenneth C. Jungling; John Robert McNeil

doi:10.1117/12.60103

29 July 1992 Fabrication of optical surfaces with low subsurface damage using a float polishing process

David W. Reicher, C. F. Kranenberg, R. S. Stowell, Kenneth C. Jungling, John Robert McNeil

Author Affiliations +

Proceedings Volume 1624, Laser-Induced Damage in Optical Materials: 1991; (1992) https://doi.org/10.1117/12.60103
Event: Laser-Induced Damage in Optical Materials: 1991, 1991, Boulder, CO, United States

Abstract

The attempt to eliminate subsurface damage in polished materials is a major objective in optical and semiconductor fabrication. The level of subsurface damage in optical components is proportional to the surface scatter and related to the laser damage threshold of the optic. The float polishing process has been shown to produce surfaces with low subsurface damage on ferrite materials. We have ground samples of rough cut Corning 7940 fused silica using synthetic polycrystalline diamond. These samples were then float polished on a precision machine manufactured by Toyoda Machine Works Limited. Our surfaces were characterized using differential phase interference microscopy, total internal reflection microscopy, and scatterometry. We will describe the fabrication process and report the results of the surface and subsurface characterization.

Citation Download Citation

David W. Reicher, C. F. Kranenberg, R. S. Stowell, Kenneth C. Jungling, and John Robert McNeil "Fabrication of optical surfaces with low subsurface damage using a float polishing process", Proc. SPIE 1624, Laser-Induced Damage in Optical Materials: 1991, (29 July 1992); https://doi.org/10.1117/12.60103

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