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:
Apr. 21, 1998
Filed:
Nov. 25, 1996
Mitsugu Imai, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an optical recording a shape of a mark which is a data recording area can be formed into a desired shape even if a temperature of an optical recording medium changes. The present invention provides a temperature detecting means for detecting the temperature of the optical recording medium and a laser power adjusting means for adjusting first laser power and second laser power on the basis of the detected temperature, and the mark is recorded in the optical recording medium by using the adjusted first laser power and the adjusted second laser power. Thereby, even if the temperature of the optical recording medium changes with influence of environmental temperature, a recording operation can be performed with an optimum laser power determined based upon the temperature of the optical recording medium. Thus, even if the temperature of the optical recording medium changes, the shape of the mark which is the data recording area can be formed into the desired shape.