Device and method for pulse recording adjustment in optical information recording

• Main Authors: SEKIGUCHI, MITSUO, KAKIMOTO, HIROYA, YAMADA, MASASHI, MATSUDA, ISAO
• Format: Patent
• Language: English; French; German
• Published: 21.12.2011
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

The present invention enables a recording condition closer to an optimum to be obtained even for media unknown to a drive. The present invention provides a method that is especially effective for the case where it is applied to a code identification scheme, such as PRML in which code identification is performed on the basis of information on an amplitude of an RF signal.; A condition for a recording pulse comprised of a top pulse, an intermediate pulse and a last pulse is configured in a predetermined order, that is, a reference condition is first determined by a test recording involving an examination of recording quality and changes in conditions for a power and a pulse width, then a condition for the last pulse is determined by a test recording using the reference condition, and subsequently a condition for the intermediate pulse is determined using the reference condition and the last pulse. A phase shift is corrected by a test recording using the recording pulse obtained by configuring the above conditions.