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:
Mar. 05, 1996
Filed:
Jul. 23, 1993
Applicant:
Inventor:
Ikuo Kasuga, Nagano, JP;
Assignee:
Kabushiki Kaisha Sanko Seiki Seisakusho, Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
2502015 ; 369 4423 ; 359719 ;
Abstract
Disclosed is an optical pickup device comprising a light source for irradiating a light beam onto an object from a light source, a half mirror for introducing said light beam reflected by the object to an optical detector; and a wedge-shaped photosensitive element, disposed between said half mirror and said optical detector, for cancelling out a coma produced by said half mirror.