Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signal

An optical information processing apparatus comprising:

• an optical head for irradiating a light beam onto an optical recording medium provided with a plurality of tracks;
• an objective lens, mounted on said optical head, for condensing the light beam onto the recording medium;
• a photodetector for receiving one of a light beam reflected by the recording medium and a light beam transmitted through the recording medium and for generating a tracking error signal indicative of a positional deviation between the light beam irradiated position and a track;
• a tracking actuator for moving said objective lens in a direction intersecting the tracks;
• tracking control means for driving said tracking actuator in accordance with the tracking error signal so as to correct the positional deviation;
• position detecting means for detecting a relative position of said objective lens with respect to said optical head in the direction intersecting the tracks;
• measuring means for measuring a relationship between an offset of the tracking error signal and a position of said objective lens from the tracking error signal and an output signal of said position detecting means;
• memory means for storing the relationship measured by said measuring means;
• and
• correction means for correcting the offset of said tracking error signal in accordance with the relationship stored in said memory means, in response to the output signal of said position detecting means.