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. 30, 1986
Filed:
Jun. 20, 1984
Applicant:
Inventor:
Kimiaki Yamamoto, Hachiouji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369116 ; 369118 ; 369122 ;
Abstract
An optical information reading apparatus wherein the intensity distribution of a light beam projected onto a video disk through an objective optical system is so made that the intensity in the direction along an information track is larger than the intensity in the direction intersecting at right angles with the information track in order to improve S/N and to eliminate cross-talks.