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:
Nov. 25, 1997
Filed:
Apr. 05, 1996
Applicant:
Inventor:
Jong-ryull Kim, Kwangmyung, KR;
Assignee:
SamSung Electronics Co., Ltd., Kyungki-Do, KR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369112 ; 369 4423 ; 369 4414 ;
Abstract
An optical pickup apparatus for an optical disk having multiple recording layers. Said apparatus includes a fixed optical system for emitting light toward the optical disk and receiving light reflected from the optical disk, a spot forming device for focusing light emitted from the fixed optical system to form a beam spot on the optical disk, and a spot zooming device for zooming the beam spot formed by the spot forming means onto a desired recording layer selected from the multiple recording layers of the optical disk.