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:
Nov. 29, 2011
Filed:
Feb. 17, 2009
Atsushi Suemasu, Tokyo, JP;
Atsushi Suemasu, Tokyo, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide an optical element which can suppress a production cost, has good heat resistance, uniformly maintains the fixed orientation of a liquid crystal polymer in a wide temperature range, shows a low haze with reliability, and can maintain desired birefringence property with reliability. The present invention relates to an optical element formed by forming, on an upper surface of a base material having light transmittance, at least a birefringence layer having a structure obtained by fixing liquid crystal monomers each having a polymerizable group at a terminal thereof in a state where the monomers are homeotropically oriented, and by removing an additive layer formed on the upper surface of the birefringence layer.