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:
Mar. 19, 2013
Filed:
Nov. 01, 2010
Applicant:
Masayuki Oto, Okaya, JP;
Inventor:
Masayuki Oto, Okaya, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); G02B 5/30 (2006.01); G01B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A half-wave plate includes a single crystal plate made of an inorganic material having a birefringent property and rotatory power, wherein a polarization plane of linearly polarized light entering from an entrance surface of the crystal plate is rotated and then output from an exit surface of the crystal plate.