Laminated transparent polarizing glasses and method of making
AssigneeCorning Incorporated
InventorsSerge P. P. Goepfert, Gildas J. M. Guillevic
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Abstract
This invention is directed to the production of laminated, transparent, polarizing glass articles. The inventive method contemplates five basic steps: (1) forming parallel microgrooves on a surface of a glass support; (2) washing and drying said surface; (3) depositing on said surface a mixture of organic colorants corresponding to the three primary colors and exhibiting a nematic state to yield a coating displaying polarizing properties; (4) treating the polarizing coating with an aqueous solution of inorganic salts having an acid pH; and (5) applying a continuous, optically transparent, composite film upon the polarizing coating and bonding it thereto.
Claims4
A laminated, transparent, polarizing glass article exhibiting a level of polarization ranging between about 90% and 50% for optical transmissions at 550 nm ranging between 25% and 45% consisting essentially of:
- (a) a support of inorganic glass having parallel microgrooves in one face thereof;
- (b) a coating exhibiting polarizing properties on said face of said support, said polarizing coating comprising a mixture of three organic colorants corresponding to the three primary colors and exhibiting a nematic state, the organic molecules of which are oriented to align with said parallel microgrooves;
- (c) the surface of said face having a metal sulfonate diffused therein;
- and
- (d) a continuous, optically transparent composite film consisting of a layer of thermoplastic polyurethane having adhesive properties and a layer of thermosetting polyurethane having anti-lacerating and self-healing properties, said thermoplastic polyurethane layer being adhered to said coating exhibiting polarizing properties.
Dependencies are inferred from the claim text.