Use of nematic thin-film coatings for visualizing the defects on polished glass surfaces

Maxim Georg Tomilin; Raymond Mercier; Jean-Paul Marioge; Michel Mullot; Gerard Tissot; L. Bernstein; Gerard Roblin

doi:10.1117/12.185783

7 September 1994 Use of nematic thin-film coatings for visualizing the defects on polished glass surfaces

Maxim Georg Tomilin, Raymond Mercier, Jean-Paul Marioge, Michel Mullot, Gerard Tissot, L. Bernstein, Gerard Roblin

Proceedings Volume 2262, Optical Thin Films IV: New Developments; (1994) https://doi.org/10.1117/12.185783
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

A thin layer of homogeneously oriented nematic liquid crystal (NLC) applied on the optical-quality surface as a free film may visualize, through a polarizing microscope, the images of defects that can not be observed with conventional microscopy: cleaning defects, local physical and chemical surface modifications and microrelief defects. A new vision of polished glass surface defects obtained by the NLC thin-film coating makes it valuable as independent technique for surface quality testing.

Citation Download Citation

Maxim Georg Tomilin, Raymond Mercier, Jean-Paul Marioge, Michel Mullot, Gerard Tissot, L. Bernstein, and Gerard Roblin "Use of nematic thin-film coatings for visualizing the defects on polished glass surfaces", Proc. SPIE 2262, Optical Thin Films IV: New Developments, (7 September 1994); https://doi.org/10.1117/12.185783

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