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:
Dec. 15, 1998
Filed:
Oct. 08, 1996
Applicant:
Inventor:
Akira Egawa, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ; G03B / ; G02B / ;
U.S. Cl.
CPC ...
356-308 ; 2502014 ; 2502016 ; 356-304 ; 396106 ;
Abstract
Light projected by a light projecting portion and reflected by an object is received by two sensor arrays (105, 106). Difference signals between signals respectively added by ring CCDs (113b, 114b) in correspondence with the ON and OFF states of the light projecting portion are calculated, and the distance to the object to be measured is calculated on the basis of the relative values of the positions of the difference signals on the sensor arrays (105, 106). The two sensor arrays (105, 106) form the base length, and the light projecting portion (104) is disposed at a position offset from the base length.