Patent ID: 8036082

Claim:
An optical disk drive including a driver for driving an optical disk; an optical pickup including an object lens for irradiating the optical disk with a light beam and for reading out recorded data by carrying out a focus pulling-in of the object lens and by receiving reflected light from a recording surface of the optical disk; and a controller for controlling the driver and the optical pickup to perform readout operation of data recorded on the optical disk, the optical disk drive comprising: a temperature detector for detecting temperature in the optical disk drive, wherein the controller detects a level peak value of a focus error signal while moving the optical pickup, calculates a focus pull-in level from the level peak value and a coefficient corresponding to the temperature detected by the temperature detector when the optical pickup is moving, carries out the focus pulling-in of the optical pickup using the focus pull-in level, makes a decision as to whether the focus pulling-in is carried out well or not using the focus error signal indicating a light receiving state of the optical pickup, and unless it makes a decision that the focus pulling-in is carried out well, it calculates the focus pull-in level in accordance with the current temperature the temperature detector detects, and retries the focus pulling-in using the focus pull-in level.