Patent ID: 7796481
Filing Date: 2010-09-14
Classification: G11B

Abstract:
1. An information recording apparatus which irradiates a laser light onto a recording medium recordable once and records information, comprising: a recording unit which records an adjustment RF signal in a predetermined area on the recording medium used for calibrating the laser light; and a detecting unit which detects the adjustment RF signal recorded in the predetermined area, wherein the recording medium has no area in which an RF signal is recorded in the entire circumference, wherein the adjustment RF signal is used for a mechanism adjustment in an optical pickup, wherein the detecting unit includes a unit which obtains an RF signal from the predetermined area and a determining unit which determines the RF signal as the adjustment RF signal when the obtained RF signal is decodable, and wherein the detecting unit determines that the adjustment RF signal is not recorded in the predetermined area, when an information amount of information recorded in the predetermined area is smaller than a unit information amount of the adjustment RF signal; when the determining unit determines that substantially the entire data in the predetermined area is not the adjustment RF signal; or when a time period or a number of times for which or at which the determining unit executes determination satisfies a predetermined condition.