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:
Feb. 11, 2003
Filed:
Sep. 21, 2000
Fuji Photo Film Co., Ltd., Minami-Ashigara, JP;
Abstract
A phase retarder comprises two optically anisotropic layers A & B. The optically anisotropic layer A essentially gives the phase retardation of &pgr; at wavelength of 550 nm, and the optically anisotropic layer B essentially gives the phase retardation of &pgr;/2 at wavelength of 550 nm. The layers A and B are laminated so that the retarder has such an optical characteristic that a retardation value per wavelength is within the range of 0.2 to 0.3 at each wavelength of 450 nm, 550 nm and 650 nm. The total thickness of the layers A and B is within the range of 500 nm to 20 &mgr;m.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile