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:
Mar. 23, 1999
Filed:
May. 27, 1997
Haruhisa Iida, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A playback method for an optical disk and an optical disk which records data relating to playback power afford increased data density and accurate playback of high resolution data. The optical disk is played back to retrieve data by first reading out playback beam intensity data and then setting playback beam intensity based on the read playback beam intensity data. Data representing the type of optical disk is also read from the optical disk and then playback beam intensity is set. The disk itself preferably has data relating to optimum playback beam intensity recorded on the substrate in a predetermined position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile