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. 05, 2008
Filed:
Oct. 21, 2004
Applicants:
Kentarou Takeda, Ibaraki, JP;
Kazutaka Hara, Ibaraki, JP;
Naoki Takahashi, Ibaraki, JP;
Miki Shiraogawa, Ibaraki, JP;
Inventors:
Kentarou Takeda, Ibaraki, JP;
Kazutaka Hara, Ibaraki, JP;
Naoki Takahashi, Ibaraki, JP;
Miki Shiraogawa, Ibaraki, JP;
Assignee:
Nitto Denko Corporation, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/3363 (2006.01); G02B 5/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotatory polarization plate capable of extracting an emission polarized light from an incident polarized light and rotating an azimuth angle of an polarization axis of the incident polarized light, wherein a rotatory polarization angle of the azimuth angle is changed by an incidence angle of the incident polarized light, is useful for an optical element capable of condensing and collimating incident light from a light source in a specific direction.