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:
Sep. 26, 2006
Filed:
May. 24, 2002
Toshiki Udagawa, Tokyo, JP;
Toshiki Udagawa, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical recording apparatus which obtains the most appropriate recording laser power state in real time according to an environmental mark-generation condition. When data is recorded (marks and spaces are generated) by emitting pulse-train-manner laser outputs to an organic-pigment recording medium, a space-period signal value corresponding to a space period is detected in a reflected-light information signal to estimate a first-pulse signal value corresponding to a first pulse. In addition, a second-and-subsequent-pulse signal value corresponding to second and subsequent pulses is detected in the reflected-light information signal. The ratio between the estimated first-pulse signal value and the detected second-and-subsequent-pulse signal value is obtained, and the obtained ratio and a reference ratio are used to generate a laser-power compensation signal to control the power of the laser outputs.