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7 September 1994 Use of nematic thin-film coatings for visualizing the defects on polished glass surfaces
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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