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:
Apr. 18, 2006
Filed:
Jun. 27, 2003
Applicants:
Fumitoshi Kobayashi, Osaka, JP;
Katsuhide Shimmo, Osaka, JP;
Inventors:
Fumitoshi Kobayashi, Osaka, JP;
Katsuhide Shimmo, Osaka, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and an apparatus for aligning the longitudinal direction of grooves of a diffraction grating to a predetermined direction. The method and apparatus detect a diffracted light pattern sent from the diffraction grating, and displace the diffraction grating such that the direction of an arranging direction obtained from the diffracted light pattern is aligned in the predetermined direction.