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:
Oct. 18, 1988
Filed:
Sep. 23, 1986
Applicant:
Inventors:
Shigeaki Koike, Kanagawa, JP;
Akio Yamakawa, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G01J / ;
U.S. Cl.
CPC ...
369 46 ; 250201 ; 356153 ; 313512 ;
Abstract
A compact skew or skewness detector conventiently applicable for an optical information reproducing apparatus and so forth. The skew detector includes a light source and at least a pair of photo sensors arranged side-by-side with the light source. A transparent detector housing houses the light source and photo sensors. The detector housing is provided with a deflector section for deflecting the light from the light source in such a manner that an annular or circular image of the light reflected from the surface of the object about which the skewness is to be detected is formed around the light source.