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：US20150279410A1

公开(公告)日：2015-10-01

申请号：US14627353

申请日：2015-02-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohichi SAITOH ,  Hideki HAYASHI ,  Jun-ichi ASADA

IPC: G11B7/1392 ,  G11B7/003

CPC classification number: G11B7/13927 ,  G11B7/003 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/13 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1362 ,  G11B7/1381 ,  G11B7/14 ,  G11B7/24009 ,  G11B2007/0003

Abstract: An optical recording and playback apparatus o includes: a light source configured to emit a light beam; a tracking mirror configured to change a direction of the light beam; a collimator configured to form the light beam into a parallel light beam; an objective lens configured to collect the parallel light beam to the optical tape; a lens actuator configured to adjust a position of the objective lens in a focus direction of the optical tape and a position of the objective lens in a tracking direction of the optical tape; a polarization hologram plate configured to separate a reflected light beam of the light beam; a photodetector receiving elements configured to receive the plurality of light fluxes; and a control circuit configured to control the lens actuator and the tracking mirror. The tracking mirror is disposed near the light source, and movable in the tracking direction.

Abstract translation: 光学记录和重放装置o包括：被配置为发射光束的光源; 配置为改变光束的方向的跟踪反射镜; 准直器，被配置为将光束形成为平行光束; 配置成将平行光束收集到光带的物镜; 透镜致动器，被配置为调整所述物镜在所述光带的聚焦方向上的位置以及所述物镜在所述光带的跟踪方向上的位置; 被配置为分离光束的反射光束的偏振全息图板; 被配置为接收所述多个光束的光电检测器接收元件; 以及控制电路，被配置为控制透镜致动器和跟踪反射镜。 跟踪反射镜设置在光源附近，并可沿跟踪方向移动。