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:
Sep. 21, 1993
Filed:
Sep. 24, 1991
Yuichiro Akatsuka, Tama, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An information recording/reproducing apparatus having two light sources, one of which is for use in recording information and the other one of which is for use in reproducing information, in which during action when information is recorded on an information recording medium in the apparatus, tracking errors of light beams emitted from the two light sources are corrected with the aid of a tracking error signal detected from reflection light beams of light beams emitted from a light source for use in recording information. Therefore, the light beams spot of the light beam for use in recording information can be positioned at a center portion of a data track without regard to a relative positional relation between the light beam for recording information and the light beam for reproducing information.