Tilt compensating apparatus and method and optical recording and reproducing apparatus using the tilt compensating method

摘要

A tilt compensation apparatus and method minimizes a coma aberration generated due to a tilt of an optical disc by canceling a tilt offset amount of a tilt sensor. An objective lens converges a light emitted by a light source mounted on an optical pickup and irradiating the light onto a recording surface of the optical disc. An objective lens tilt actuator controls tilt of the objective lens. An objective lens tilt sensor detects an amount of tilt of the objective lens. An optical disc tilt sensor detects an amount of tilt of the optical disc. An operator computes an amount of relative tilt between the objective lens and the optical disc in accordance with the amount of tilt detected by the objective lens tilt sensor and the amount of tilt detected by the optical disc tilt sensor. A memory part stores an amount of offset of tilt generated in each of the tilt sensors. An offset adjuster adjusts an amount of offset of tilt of the optical pickup in accordance with the amount of offset of tilt stored in the memory part.