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:
Jan. 06, 2009
Filed:
Aug. 19, 2005
Applicants:
Yasuji Seko, Kanagawa, JP;
Yoshinori Yamaguchi, Kanagawa, JP;
Hiroyuki Miyake, Kanagawa, JP;
Inventors:
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 11/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A position measurement system includes a photographing unit and an arithmetic processing unit. The photographing unit has a lens and a light-receiving element. The lens forms an optical ring image from light from a light source through spherical aberration. The light-receiving element detects the optical ring image formed by the lens. The arithmetic processing unit measures a distance to the light source on the basis of the quantity of light of the optical ring image detected by the light-receiving element.