The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1976
Filed:
Jul. 03, 1974
Norman U Laliberte, Woodstock, CT (US);
American Optical Corporation, Southbridge, MA (US);
Abstract
A laminated optical element is produced by prepositioning a polarizing sheet, which has been coated on both sides with adhesive compatible with the encasing material, in a mold so as to accurately space the polarizing sheet from the inner mold surfaces, injecting a monomer of allyl diglycol carbonate into the mold so as to completely encase the polarizing sheet, and then curing the laminate. The process includes producing stress free castings capable of being subjected to subsequent color accepting treatment and various finishing processes. The laminated product provides a fully encased polarizing sheet with a thin layer of uniform thickness of the polymer on the front side of the polarizing sheet which may be readily finished for optical devices.