公开(公告)号：US07365296B2

公开(公告)日：2008-04-29

申请号：US11427703

申请日：2006-06-29

申请人： Akira Tsukihashi ,  Shigeru Nakamura ,  Misao Kuramochi ,  Mitsuhiro Hiruma ,  Michiyoshi Sawada ,  Hiromitsu Kondo

发明人： Akira Tsukihashi ,  Shigeru Nakamura ,  Misao Kuramochi ,  Mitsuhiro Hiruma ,  Michiyoshi Sawada ,  Hiromitsu Kondo

IPC分类号： G02B7/04

CPC分类号： H03F3/08

摘要： In the optical pickup unit configured to guide a laser beam emitted from a laser source to an objective lens, to converge the laser beam with the objective lens to be irradiated to a disk, and to guide the laser beam reflected and returned by the disk to the photo detector including a light reception region constituted by a plurality of segments, the photo detector is disposed with each amplifier corresponding to each segment of the light reception region, is disposed with each output terminal that outputs each light reception output corresponding to each segment from the photo detector via each amplifier, and is disposed with an output setting circuit that sets each light reception output from each of the output terminals by changing the gain of each of the amplifiers and/or by attenuating the input or output of each of the amplifiers with an attenuator.

摘要翻译： 在被配置为将从激光源发射的激光束引导到物镜的光学拾取单元中，将具有要照射到盘的物镜的激光束会聚并将由盘反射和返回的激光束引导到 光检测器包括由多个段构成的光接收区域，光检测器设置有与光接收区域的每个段对应的每个放大器，每个输出端子输出与每个段对应的每个光接收输出 经由每个放大器的光电检测器，并且设置有输出设置电路，其通过改变每个放大器的增益来设置每个输出端子的每个光接收输出和/或通过衰减每个放大器的输入或输出 与衰减器。

公开(公告)号：US20070001092A1

公开(公告)日：2007-01-04

申请号：US11427703

申请日：2006-06-29

申请人： Akira Tsukihashi ,  Shigeru Nakamura ,  Misao Kuramochi ,  Mitsuhiro Hiruma ,  Michiyoshi Sawada ,  Hiromitsu Kondo

发明人： Akira Tsukihashi ,  Shigeru Nakamura ,  Misao Kuramochi ,  Mitsuhiro Hiruma ,  Michiyoshi Sawada ,  Hiromitsu Kondo

IPC分类号： G02B27/40 ,  H03F3/08

CPC分类号： H03F3/08

摘要： In the optical pickup unit configured to guide a laser beam emitted from a laser source to an objective lens, to converge the laser beam with the objective lens to be irradiated to a disk, and to guide the laser beam reflected and returned by the disk to the photo detector including a light reception region constituted by a plurality of segments, the photo detector is disposed with each amplifier corresponding to each segment of the light reception region, is disposed with each output terminal that outputs each light reception output corresponding to each segment from the photo detector via each amplifier, and is disposed with an output setting circuit that sets each light reception output from each of the output terminals by changing the gain of each of the amplifiers and/or by attenuating the input or output of each of the amplifiers with an attenuator to correct each light reception output from each of the output terminals with the output setting circuit depending on an output difference generated in each light reception output from each of the output terminals based on a position of a light reception spot projected on the light reception region.

摘要翻译： 在被配置为将从激光源发射的激光束引导到物镜的光学拾取单元中，将具有要照射到盘的物镜的激光束会聚并将由盘反射和返回的激光束引导到 光检测器包括由多个段构成的光接收区域，光检测器设置有与光接收区域的每个段对应的每个放大器，每个输出端子输出与每个段对应的每个光接收输出 经由每个放大器的光电检测器，并且设置有输出设置电路，其通过改变每个放大器的增益来设置每个输出端子的每个光接收输出和/或通过衰减每个放大器的输入或输出 具有衰减器，以根据输出差异与输出设置电路校正每个输出端子的每个光接收输出 基于投射在光接收区域上的光接收点的位置，从每个输出端子的每个光接收输出中产生的反射。