公开(公告)号：US10049695B2

公开(公告)日：2018-08-14

申请号：US15509960

申请日：2015-12-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi Yajima ,  Kazuyoshi Kajita ,  Masahiko Nakamura

IPC: G11B7/00 ,  G11B7/127 ,  G11B7/1367 ,  G02B6/28 ,  G02B6/35

Abstract: An optical pickup device includes a semiconductor laser that emits a laser beam, and an object lens that concentrates the laser beam emitted from the semiconductor laser on an optical disc. In this optical pickup device, an optical axis of the object lens is inclined with respect to an optical axis of the laser beam that is incident on the object lens so as to generate flares caused by coma aberration on an entrance side in a forward direction of pits of the optical disc.