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:
Aug. 20, 2002
Filed:
Jun. 23, 2000
Applicant:
Inventors:
Fumio Ohtomo, Tokyo-to, JP;
Akio Kimura, Tokyo-to, JP;
Ryo-uji Musashi, Tokyo-to, JP;
Ikuo Ishinabe, Tokyo-to, JP;
Assignee:
Kabushiki Kaisha TOPCON, Tokyo-to, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 1/126 ; G01B 1/00 ; G01B 2/102 ;
U.S. Cl.
CPC ...
G01B 1/126 ; G01B 1/00 ; G01B 2/102 ;
Abstract
A device for detecting optical position, comprising a photodetection unit having a photodetection optical axis and for outputting a photodetection signal corresponding to a light receiving position of a projected light beam, and a modulation grid arranged on said photodetection optical axis and for equalizing distribution of light quantity of a received light beam, wherein a position of the light beam projected on the photodetection unit is detected based on said photodetection signal.