公开(公告)号：US20190341072A1

公开(公告)日：2019-11-07

申请号：US16512875

申请日：2019-07-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuo MOMOO ,  Yuichi TAKAHASHI

IPC: G11B7/09 ,  G11B7/095 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/24 ,  G11B7/085

Abstract: An optical information processing device writes and reads information on an information recording medium having recording layers. The optical information processing device includes: first and second light sources; a light condensing element that condenses light from the first and second light sources on the medium; a first photodetector that receives light reflected by the medium after being emitted from the first light source and generates a first focusing error signal; a second photodetector that receives light reflected by the medium after being emitted from the second light source and generates a second focusing error signal; and a focusing control circuit that controls the light condensing element by using the first focusing error signal in such a manner that the light from the second light source is condensed on each of the recording layers. The second focusing error signal is used to add a correction to the focusing control circuit.

公开(公告)号：US20170270958A1

公开(公告)日：2017-09-21

申请号：US15610787

申请日：2017-06-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuo MOMOO ,  Yuichi TAKAHASHI ,  Noritaka AKAGI

IPC: G11B7/09 ,  G11B7/13

CPC classification number: G11B7/09 ,  G11B7/08582 ,  G11B7/13 ,  G11B7/14

Abstract: A record playback apparatus of the present disclosure includes a plurality of optical pickups that records information on a recording medium or plays back information from the recording medium; a single transport mechanism that transports the plurality of optical pickups together; and a transport control circuit that drives the single transport mechanism so that, when the single transport mechanism is driven to transport the plurality of optical pickups to respective target positions on the recording medium, absolute value of a maximum value of transport errors of the plurality of optical pickups with respect to the respective target positions becomes substantially equal to absolute value of a minimum value of transport errors of the plurality of optical pickups with respect to the respective target positions.

公开(公告)号：US20150318010A1

公开(公告)日：2015-11-05

申请号：US14650139

申请日：2013-06-27

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Jun-ichi ASADA ,  Yuichi TAKAHASHI ,  Hiroaki MATSUMIYA ,  Kazuo MOMOO

IPC: G11B7/09 ,  G11B7/1365 ,  G11B7/1353

CPC classification number: G11B7/00458 ,  G02B5/1871 ,  G02B5/3016 ,  G02B27/286 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1365

Abstract: An optical pickup includes a light source 1; a diffraction element 2 for generating a write main beam and a read sub-beam via diffraction; an objective lens 5; a wavelength plate 9; a polarization hologram element 7 having a plurality of diffraction regions with different diffraction characteristics, designed so that each diffraction region separates a light beam reflected from the optical storage medium and transmitted through the wavelength plate into a 0th order light beam and ±1st order light beams; an actuator 11; and a photodetector 10 configured to detect a light beam reflected from the optical storage medium 6 and diffracted by the polarization hologram element 7. The photodetector 10 generates an RF signal from a detection result concerning a 0th order light beam derived from the main beam, generates a focus error signal and a tracking error signal from a detection result concerning one of ±1st order light beams derived from the main beam, and generates a signal indicating that data has been recorded normally from a detection result concerning a 0th order light beam derived from the sub-beam.

Abstract translation: 光拾取器包括光源1; 用于通过衍射产生写入主光束和读取子光束的衍射元件2; 物镜5; 波片9; 具有多个具有不同衍射特性的衍射区域的偏振全息元件7被设计成使得每个衍射区域将从光存储介质反射的光束分离并透过波长板成为第0级光束和±1级光束 ; 致动器11; 以及光检测器10，其被配置为检测从光存储介质6反射并被偏振全息元件7衍射的光束。光电检测器10根据从主光束导出的第0级光束的检测结果产生RF信号，产生 来自关于从主光束导出的±1级光束中的一个的检测结果的聚焦误差信号和跟踪误差信号，并且从根据来自于...的第0级光束的检测结果生成表示数据已被正常记录的信号 子光束。

公开(公告)号：US20210311291A1

公开(公告)日：2021-10-07

申请号：US17346813

申请日：2021-06-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshiaki KOMMA ,  Yuichi TAKAHASHI

IPC: G02B19/00

Abstract: This objective lens has a single lens that has a numerical aperture of 0.85 or more. A base material thickness th and a base material thickness tm differ from each other. The base material thickness th is a thickness where third-order spherical aberration is minimized when a light beam that is substantially parallel is input to the objective lens, and the base material thickness tm is a thickness where total aberration is minimized when third-order spherical aberration is minimized by changing parallelism of the light beam input to the objective lens from a parallel state.

公开(公告)号：US20170263280A1

公开(公告)日：2017-09-14

申请号：US15377044

申请日：2016-12-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuo MOMOO ,  Junichi ASADA ,  Yasushi KOBAYASHI ,  Kousei SANO ,  Yuichi TAKAHASHI

IPC: G11B7/09

CPC classification number: G11B7/0901 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/133

Abstract: The first, third, fourth, and seventh photosensors are disposed on one side with respect to the centerline, and the second, fifth, sixth, and eighth photosensors are disposed on another side with respect to the centerline. The first and seventh photosensors are positioned between the third and fourth photosensors in the direction parallel to the centerline. The second and eighth photosensors are positioned between the fifth and sixth photosensors in the direction parallel to the centerline. The first photosensor receives overlapped light of the 0th-order light with the +1st-order diffracted light, the second photosensor receives overlapped light of the 0th-order light with the −1st-order diffracted light, each of the third to sixth photosensors receives the 0th-order light, and does not receive the +1st-order diffracted light and the −1st-order diffracted light, and each of the seventh and eighth photosensors receives at least the 0th-order light.

公开(公告)号：US20160254019A1

公开(公告)日：2016-09-01

申请号：US15014873

申请日：2016-02-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuo MOMOO ,  Yuichi TAKAHASHI

IPC: G11B7/007

CPC classification number: G11B7/00718 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/094 ,  G11B7/127 ,  G11B7/131 ,  G11B7/14

Abstract: A recording and reproducing apparatus according to the present disclosure includes a first optical pickup configured to record information on either a land track and a groove track, with respect to a recording medium that is able to be recorded in the land track and the groove track, a second optical pickup configured to record information on a track different from a track recorded by the first optical pickup, and a controller configured to cause the first optical pickup to record information if tracks of both sides of a track that the first optical pickup follows are recorded, and to cause the second optical pickup to record information if tracks of both sides of a track that the second optical pickup follows are recorded.

Abstract translation: 根据本公开的记录和再现装置包括：第一光学拾取器，被配置为相对于能够被记录在岸台轨道和凹槽轨道中的记录介质，在岸台轨道和凹槽轨道上记录信息， 第二光学拾取器，被配置为在与由第一光学拾取器记录的轨道不同的轨道上记录信息;以及控制器，被配置为使得第一光学拾取器记录信息，如果第一光学拾取器跟踪的轨道的两侧的轨道是 并记录第二光拾取器跟踪第二光拾取器的轨道的两侧的轨道的记录信息。