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. 28, 1993
Filed:
Aug. 07, 1992
Takao Rokutan, Higashimurayama, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A method of accessing an optical card comprises a first accessing step of making a beam spot projected from an optical head access a target track on the optical card, on those regions of the optical card which are on the outside of ID areas situated on the optical card at its both end portions along an axis of movement of the optical card, a detecting step of detecting whether a tracking error of the beam spot has occurred, following the completion of the first accessing step, and a second accessing step of making, where the tracking error of the beam spot has been detected, the beam spot access the target track on the region on the side opposite to the side where the tracking error has occurred.