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. 22, 2005
Filed:
Apr. 08, 2003
Applicant:
Kenichi Hayashi, Nagano, JP;
Inventor:
Kenichi Hayashi, Nagano, JP;
Assignee:
Sankyo Seiki Mfg. Co., Ltd., Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B005/18 ;
U.S. Cl.
CPC ...
Abstract
An optical element including a binary blaze grating formed thereon, wherein the binary blaze grating is formed so as to have step differences formed by a number of levels produced by mechanical processing. The number of levels is equal to or more than 5 and the height of the step difference is greater than or equal to 1 μm.