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. 30, 2004
Filed:
Sep. 05, 2000
Applicant:
Inventors:
Atsushi Tanaka, Yamato, JP;
Masahide Hasegawa, Yokohama, JP;
Kiwamu Kobayashi, Yokohama, JP;
Masaaki Kanashiki, Yokohama, JP;
Yuichiro Yoshimura, Kamakura, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 1/114 ;
U.S. Cl.
CPC ...
G01B 1/114 ;
Abstract
A plurality of linear sensors ( X X Y Y ) sense a beam spot and the results of sensing the beam spot are corrected. The corrected items of data are concatenated and coordinates corresponding to the beam spot are calculated by a coordinate calculation unit ( ) based upon the concatenated data. Light-receptive areas of the linear sensors ( X X Y Y ) have mutually overlapping portions.