Coating processes – Optical element produced
Reexamination Certificate
2006-02-07
2006-02-07
Xu, Ling (Department: 1775)
Coating processes
Optical element produced
C427S163100, C264S001100, C264S002700, C264S241000, C264S319000, C428S304400, C428S312600, C428S314200, C428S426000, C428S696000, C428S307300, 91
Reexamination Certificate
active
06994885
ABSTRACT:
The invention provides an optical filter comprising:a. an organic, solar blind filter dye; andb. a UV-transparent, non-scattering and chemically stable substrate.The substrate may be a UV-transparent nanoporous silica glass solid having pores that are substantially filled with a UV-transparent solvent, which has been selected to dissolve said dye and also to match the refractive index of the nanoporous silica glass solid. Alternatively, the substrate may be a UV-transparent inorganic salt compressed to form a solid body. The invention also provides for methods of making these embodiments and an optical device comprising such an optical filter. The filter provides an efficient solar blind filter that is chemically and dimensionally stable.
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J. A. Welch et al., “Preparation of an Ultraviolet Optical Filter Component Composed of an Organic Dye in a Polymeric Thin Film,” NRL Memorandum Report 6854, Jul. 29, 1991.
Flom Steven R.
Pong Richard G. S.
Shirk James S.
Kap George A.
Karasek John J.
The United States of America as represented by the Secretary of
Xu Ling
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