Patent ID: 7532556

Claim:
A recording and reproducing method comprising: recording a mark other than a shortest length mark on a medium by using one pulse light; and reproducing the mark as a record by using a reproducing light, wherein the medium comprises a recording layer containing an organic dyestuff on a substrate having a guide groove at which a high-frequency wobble is provided, wherein the pulse light for recording a mark other than a shortest length mark is a heating pulse, wherein the heating pulse comprises: a leading portion; a middle portion; and a trailing end portion, wherein the heating pulse is made to be high-output for a given time at the leading portion, and a power of the leading portion is greater than a power of the trailing end portion, wherein the heating pulse is made to be high-output for a given time at the trailing end portion, and the power of the trailing end portion is greater than a power of the middle portion, and wherein a leading heating pulse width of a recording pulse train forming a mark, at which a space length immediately therebefore is a shortest length, is distinguished by whether or not a length of the mark is a shortest length, and a leading heating pulse width of a shortest length mark is set to be longer than a leading heating pulse width of a mark which is not the shortest length, and, a leading heating pulse width of a recording pulse train forming the shortest length mark is distinguished by whether or not a space length immediately before the shortest length mark is the shortest length, and a leading heating pulse width of a mark, whose space length immediately therebefore is shortest, is set to be shorter than a leading heating pulse width of a mark whose space length immediately therebefore is not shortest.