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US 4,062,996 AGranted
Transmitting and reflecting diffuser
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsLloyd S. Keafer, Jr., Ernest E. Burcher, Leonard P. Kopia
Life of this patent
Estimating the term…
Abstract
An ultraviolet grade fused silica substrate is coated with vaporized fused silica. The coating thickness is controlled, one thickness causing ultraviolet light to diffuse and another thickness causing ultraviolet light to reflect a near Lambertian pattern.
Claims3
A diffuser for producing an ultraviolet near Lambertian pattern comprising:
- a substrate;
- and
- a diffusive coating condensed from a separate piece of fused silica evenly covering said substrate and having a sufficient thickness for producing an ultraviolet near Lambertian pattern.
Dependencies are inferred from the claim text.