Information recording/reproducing apparatus with function of seeking light beam to target position, and method therefor

An information recording/reproducing apparatus comprising:

• an optical system for irradiating a light beam onto a recording medium having a plurality of tracks;
• moving means for moving the light beam in a direction to cross at least one of the plurality of tracks by moving said optical system;
• tracking error signal detection means for detecting a tracking error signal indicating a tracking error of the light beam;
• means for measuring a time of an occurrence interval of a predetermined value of the tracking error signal;
• current velocity detection means for detecting a current velocity value of said optical system every occurrence of the predetermined value using the measured time and a moving distance of said optical system, which matches the occurrence interval of the predetermined value;
• target velocity value generation means for generating a target velocity value of said optical system at the next occurrence timing of the predetermined value upon detection of the current velocity value;
• acceleration value generation means for generating an acceleration value of said optical system using the current velocity value and the target velocity value;
• and
• control means for controlling said moving means based on the acceleration value.