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:
Jul. 28, 1981
Filed:
Mar. 28, 1979
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ; G06F / ; G01B / ;
U.S. Cl.
CPC ...
358 93 ; 358100 ; 364478 ; 364559 ; 356373 ; 356426 ; 356399 ;
Abstract
In a mark detecting system using an image pickup device such as a TV camera in which a mark in the form of a regressive reflector is provided on an object, the field of view of the image pickup device is illuminated with light of a specified wavelength from an illuminating device placed in the vicinity of the image pickup device. The reflected light is introduced on the image pickup device through a filter capable of cutting off light having wavelengths other than the specified wavelength. Since the mark forms a bright pattern on an image produced within the field of view of the image pickup device, the position of the mark can be easily detected by means of a data processor which processes image signals.