OPTICAL PICKUP AND OPTICAL DISC DEVICE

摘要

An optical pickup is configured such that light split by a light-splitting element is received by light-receiving elements provided on a light-receiving surface of a light-receiving unit, has on the light-receiving surface of the light-receiving unit quartered light-receiving portions that detect position-adjustment light and configured by equal quartering so as to be arranged in two dimensions, and in which the position of the light-splitting element is adjusted based on the position-adjustment light received by each of the quartered light-receiving portions.

主权项

1. An optical pickup comprising:
a light-splitting element configured to split return light reflected by a recording surface of an optical disc and to scatter signal light used in signal processing and position-adjustment light that is not used in signal processing in different directions other than a direction of an optical axis of zeroth-order light; and a light-receiving unit configured to receive each of the signal light and position-adjustment light generated by the light-splitting element; wherein an adjustment-light light-receiving unit configured to detect the position-adjustment light and provided on a light-receiving surface of the light-receiving unit, the adjustment-light light-receiving unit includes quartered light-receiving portions defined by equal quartering so as to be arranged in two dimensions; and a position of the light-splitting element is adjusted based on the position-adjustment light received by each of the quartered light-receiving portions.