Laminated glass lenses

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B - Operations, Transporting

32

B

154/122, 88/38

B32B 17/10 (2006.01) B32B 7/12 (2006.01) G02C 7/02 (2006.01) G02C 7/10 (2006.01)

Patent

CA 1292669

Abstract of the Disclosure This invention relates to the fabrication of three- layer composite lenses especially suited for ophthalmic applications. The lenses comprise a thin layer of an inorganic glass, desirably photochromic glass, an organic plastic, and an organic adhesive exhibiting flexibility and can be cured at temperatures in the vicinity of room temperature. In general, the linear coefficient of expansion of the glass ranges between about 60-120 x 10-7/°C and that of the plastic between about 200-700 x 10-7/°C.

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