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. 24, 1998
Filed:
Oct. 16, 1996
Kenya Yokoi, Kawasaki, JP;
Ikuo Aoki, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In an information recording system, information is recorded, through light from a light source, in a recording medium comprising a recording layer which has a phase reversibly changeable between a crystal phase and an amorphous phase. The light source emits, for forming a record mark in the recording layer, multi-pulse light which includes a head heating pulse, a head cooling pulse and following rear heating pulse and rear cooling pulse in the stated order. The head heating pulse includes a front division and a rear division. The difference in light-emission power between the head heating pulse and an immediately following cooling pulse is larger than the difference in light-emission power between another heating pulse and an immediately following cooling pulse.