Patent ID: 7983121

Claim:
An optical axis shift correcting apparatus for correcting a shift of an optical axis of light on a surface of a light receiving element with respect to a radial direction of an optical disc set on an optical information apparatus comprising: an irradiating device for irradiating a laser beam; an optical system for guiding the irradiated laser beam to the optical disc with a recording track; and the light receiving element for receiving, through the optical system, the light from the optical disc caused by the guided laser beam, said optical axis shift correcting apparatus comprising: a jitter obtaining device for obtaining a jitter amount of a signal obtained on the basis of the received light; an optical axis changing device for changing a direction of the optical axis with respect to the light receiving element; and a controlling device for controlling said optical axis changing device to reduce the shift if the obtained jitter amount exceeds a predetermined threshold value.