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. 03, 1994
Filed:
Feb. 10, 1993
Shigeaki Koike, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
To determine the optimum recording light amounts for all recordable regions of each optical disk in a relatively short time, information is recorded on the try-to-write region 4 on the inside of the innermost periphery of the rewritable region 2 of the optical disk 1 while rotating it at linear velocities equal to the recording velocities of at least two positions (radii R1, R2) in the radius direction A within the rewritable region 2, and the optimum recording light amounts are measured. Then, the optimum recording light amounts for all velocities in the rewritable region 2 are determined by an interpolation or extrapolation processing 26 of the measured optimum recording light amounts at the two velocities.