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:
Feb. 12, 2002
Filed:
Jun. 29, 2000
Applicant:
Inventor:
Satoshi Hineno, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/12 ;
U.S. Cl.
CPC ...
G11B 7/12 ;
Abstract
The invention relates to an optical pickup and an optical disk apparatus applicable to, for example, an optical disk apparatus adapted to access a high-density recorded optical disk, so as to realize a simplified structure capable of preventing any characteristic deterioration of a focus error signal caused by horizontal deviation. An optical path length difference generator unit is disposed in an optical path to produce an optical path difference between two luminous fluxes obtained through resolution of return light.