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Photochromic glass and lens - US Patent 6165922 from PatentStorm. A fixed tint, photochromic glasses and sunglass lenses produced therefrom.
Photochromic lenses are lenses that darken on exposure to UV radiation. Once the UV is removed (for example by walking indoors), the lenses will gradually return to their clear state. Photochromic lenses may be made of either glass or plastic. The glass version of this type of lenses was first dev...
Corning has updated its offerings to include Thin & Dark photochromic glass lenses, which are up to 30 percent lighter in weight than traditional glass lenses and also thinner.
These eyeglasses are made from a special photochromic glass that contains about 0.01% to 0.1% silver halide crystals.
A silver halide photochromic glass has <p> a. a clear luminous transmittance of about 90%, </p><p> b. A darkened luminous transmittance at 20° C. below about 25%. < ... 4190451 Photochromic glass February, ...
Photochromic glass darkens when exposed to ultraviolet rays and clears up when the rays are removed. Photochromic glass is used for windows, sunglasses, and instrument controls.
Abstract. Commercially available photochromic glasses exhibit a wide range of spectral sensitivities and darkening response times.
CORNING GLASS WORKS
3327120 Infrared imaging system using a photochromic glass viewing screen...
A process for producing a photochromic glass which will exhibit a brown coloration in its darkened state without a degradation in the photochromic properties of the glass taking place. The ...
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