Optical disc apparatus

An optical disc apparatus comprising:

• a laser light source configured to emit laser light;
• an objective lens configured to allow the laser light to be applied to a recording layer of an optical disc;
• an aberration correction lens arranged in an optical path between the laser light source and the objective lens, the aberration correction lens configured to be moved in an optical axis direction according to a thickness of a cover layer of the optical disc from an incident face to the recording layer;
• a stepping motor configured to drive the aberration correction lens;
• a driving unit configured to generate a driving pulse for driving the stepping motor;
• a storage unit configured to store current position information of the aberration correction lens based on the number of the driving pulse;
• and
• a control unit configured to control the driving unit so that the aberration correction lens is moved between a first position set in a mechanical movable range of the aberration correction lens and a second position set on the objective lens side with respect to the first position,
• the control unit
• controlling the driving unit so that the aberration correction lens is moved to the second position, when rotation of the optical disc is stopped, and
• controlling the driving unit so that the aberration correction lens is moved to a start position between the first position and the second position according to the thickness of the cover layer based on the current position information of the aberration correction lens, when stop of the rotation of the optical disc is cancelled.