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:
May. 27, 1997
Filed:
Jan. 26, 1993
Toshio Horiguchi, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An optical information recording/reproducing apparatus using an optical device to radiate a reproducing light beam originating from a second light source onto regions of an optical recording medium that include a track on an optical recording medium which contains at least a spot formed by a recording light beam originating from a first light source, these regions being situated behind and in front of the spot formed by the recording light beam relative to the direction of movement of the recording light beam. The apparatus also includes a tracking error signal generator for using light of the reproducing light beam reflected from the optical recording medium to generate a tracking error signal. This apparatus uses the generated error signal to help the recording light beam to track a track on the recording medium, thus controlling the position of the spot formed by the recording light beam so that the spot will lie in the middle of the track all the time.