公开(公告)号：US12014761B2

公开(公告)日：2024-06-18

申请号：US18030226

申请日：2021-10-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuuichi Kuze ,  Masatoshi Yajima ,  Shinichi Konishi ,  Akihiko Nishioka

IPC: G11B7/0037 ,  G01N21/95 ,  G11B7/127 ,  G11B7/00

CPC classification number: G11B7/00375 ,  G01N21/9506 ,  G11B7/127 ,  G11B2007/0006

Abstract: An optical disc device includes: an optical pickup including a first laser light source that emits laser light, an objective lens that focuses the laser light emitted from the first laser light source onto an optical disc, and a light receiving element that receives reflected light from the optical disc, and performs photoelectric conversion on the reflected light received to output a received-light signal; an FS signal generator that generates an FS signal indicating the light amount of the reflected light from the optical disc, based on the received-light signal from the light receiving element; and a dirt determiner that determines that dirt is present in the optical pickup, when the peak level of the FS signal is less than a dirt determination threshold, and controls the light receiving element to increase the peak level of the received-light signal from the light receiving element.

公开(公告)号：US10085385B2

公开(公告)日：2018-10-02

申请号：US15072841

申请日：2016-03-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi Yajima ,  Akifumi Hashimoto ,  Kenji Kawano ,  Masahiro Yamazaki

IPC: A01G7/04 ,  F21V23/00 ,  F21Y115/30 ,  F21Y115/10

Abstract: A plant cultivation apparatus of the present disclosure includes a first light source unit configured to include a first laser diode radiating a first light beam, and a first scanning mechanism scanning the first light beam and forming a first radiation region, a second light source unit configured to include a second laser diode radiating a second light beam, and a second scanning mechanism scanning the second light beam and forming a second radiation region, and a signal processor configured to control the first light source unit and the second light source unit. A wavelength of the first light beam is the same as a wavelength of the second light beam. The signal processor forms a multiple radiation region by causing the first radiation region and the second radiation region to overlap each other.

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.