公开(公告)号：US20090109826A1

公开(公告)日：2009-04-30

申请号：US12117227

申请日：2008-05-08

申请人： Kyongtae PARK ,  Tae-kyung KIM ,  Jae-cheol BAE

发明人： Kyongtae PARK ,  Tae-kyung KIM ,  Jae-cheol BAE

IPC分类号： G11B7/00

CPC分类号： G11B7/0943 ,  G11B7/0903 ,  G11B7/131 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical pickup and a recording and/or reproducing apparatus having the same, the optical pickup including: a light source emitting a light beam; an objective lens focusing the emitted light beam onto a multi-layered optical information storage medium; a polarization dependent optical path changer changing a proceeding path of the light beam; a photodetector detecting a signal beam reflected from the optical information storage medium; and a polarization element provided on an optical path of the reflected signal beam, and reducing interference between the signal beam and a noise beam reflected from an adjacent layer on a light receiving plane by changing a polarization state of the signal beam in at least a portion where the signal beam overlaps with the noise beam.

摘要翻译： 一种光拾取器及具有该拾取器的记录和/或再现装置，该光拾取器包括：发射光束的光源; 将发射的光束聚焦到多层光学信息存储介质上的物镜; 偏振相关光路改变器改变光束的行进路径; 检测从所述光信息存储介质反射的信号光束的光检测器; 以及设置在所述反射信号光束的光路上的偏振元件，并且通过在至少一部分中改变所述信号光束的偏振状态来减小所述信号光束与从光接收面上的相邻层反射的噪声光束之间的干涉 其中信号光束与噪声光束重叠。

公开(公告)号：US20080175108A1

公开(公告)日：2008-07-24

申请号：US11966073

申请日：2007-12-28

申请人： Kyongtae Park ,  Tae-kyung Kim ,  Jae-cheol Bae

发明人： Kyongtae Park ,  Tae-kyung Kim ,  Jae-cheol Bae

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/0941 ,  G11B7/0943 ,  G11B2007/0013

摘要： An optical information storage medium system includes an optical pick-up to detect a main push-pull signal and a sub-push pull signal, and a signal operating unit including first and second operating parts to respectively generate a main push-pull signal and a sub-push-pull signal, a noise removing unit to electrically filter the sub-push-pull signal to remove noise caused by light reflected by layers other than a target layer for recording and/or reproducing, and a subtractor to generate a tracking error signal by subtraction of the main push-pull signal and the sub-push-pull signal which is filtered by the noise removing part.

摘要翻译： 光信息存储介质系统包括用于检测主推挽信号和副推挽信号的光拾取器，以及包括第一和第二操作部分的信号操作单元，以分别产生主推挽信号和 子推挽信号，噪声去除单元，用于对副推挽信号进行电过滤，以消除由用于记录和/或再现的目标层以外的层反射的光引起的噪声;以及减法器，用于产生跟踪误差 通过减去主要推挽信号和由噪声去除部分滤波的副推挽信号的信号。

公开(公告)号：US20100165175A1

公开(公告)日：2010-07-01

申请号：US12578409

申请日：2009-10-13

申请人： Shitao DENG ,  Kyongtae Park

发明人： Shitao DENG ,  Kyongtae Park

IPC分类号： G03B13/00 ,  G03B13/22

CPC分类号： G03B13/36 ,  G02B7/285 ,  G02B7/34 ,  G02B27/0068 ,  H04N5/23212

摘要： Disclosed are a focus detecting apparatus capable detection in various light illumination conditions and an image acquiring apparatus having the same. The focus detecting apparatus may include a mark disposed on a primary image plane. A pair of images of the mark is detected by a sensor, the distance between which images is used to determine the main wavelength of the light received from a subject. The main wavelength is used in determining the chromatic aberration correction by which the defocus amount may be adjusted.

摘要翻译： 公开了一种能够在各种光照条件下进行检测的焦点检测装置和具有该焦点检测装置的图像获取装置。 焦点检测装置可以包括设置在主图像平面上的标记。 通过传感器检测出标记的一对图像，使用这些图像之间的距离来确定从被摄体接收的光的主波长。 主波长用于确定可以调整散焦量的色像差校正。

公开(公告)号：US20090175150A1

公开(公告)日：2009-07-09

申请号：US12267114

申请日：2008-11-07

申请人： Kyongtae PARK ,  Tae-kyung Kim

发明人： Kyongtae PARK ,  Tae-kyung Kim

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/127 ,  G11B7/13922 ,  G11B2007/13727

摘要： A multi-channel optical pick-up and a multi-channel optical recording and/or reproducing apparatus employing the same, the multi-channel optical pick-up including: a plurality of light sources including a center light source closest to an optical axis from among the plurality of light sources and at least one off-axis light source farther than the center light source to the optical axis; an objective lens to condense a plurality of light beams respectively emitted from the plurality light sources onto a plurality of tracks of an information storage medium; and an optical path length changing element to compensate for defocus that occurs due to the at least one off-axis light source distanced from the optical axis when a center light beam from the center light source and at least one off-axis light beam from the at least one off-axis light source form spots on the information storage medium.

摘要翻译： 一种多通道光学拾取器和采用该多通道光学拾取器的多通道光学记录和/或再现装置，所述多通道光学拾取器包括：多个光源，包括最靠近光轴的中心光源 在所述多个光源中的至少一个离轴光源比所述中心光源更远离所述光轴; 用于将从所述多个光源分别发射的多个光束冷凝到信息存储介质的多个轨道上的物镜; 以及光路长度改变元件，用于补偿当来自所述中心光源的中心光束和来自所述中心光源的至少一个离轴光束从所述光轴远离所述至少一个离轴光源时发生的散焦 至少一个离轴光源在信息存储介质上形成斑点。

公开(公告)号：US20090067315A1

公开(公告)日：2009-03-12

申请号：US12037365

申请日：2008-02-26

申请人： Kyongtae PARK ,  Tae-kyung Kim ,  Jae-cheol Bae

发明人： Kyongtae PARK ,  Tae-kyung Kim ,  Jae-cheol Bae

IPC分类号： G11B7/14 ,  G11B7/00

CPC分类号： G11B7/0909 ,  G11B7/127 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13927 ,  G11B7/14 ,  G11B2007/0013

摘要： A multi-channel optical recording and/or reproducing apparatus includes an optical pickup including a plurality of light sources, the optical pickup being adapted to emit a plurality of light beams to a corresponding plurality of tracks of an information storage medium and to detect a plurality of light beams reflected by the corresponding plurality of tracks of the information storage medium; and a control signal generating unit to generate a control signal which equalizes and controls aberrations occurring due to a wavelength difference between the plurality of light sources, a displacement difference on an optical axis between the light sources, or a distance between the light sources, based on detection signals generated according to the plurality of reflected light beams.

摘要翻译： 一种多通道光学记录和/或再现装置，包括具有多个光源的光学拾取器，该光学拾取器适于将多个光束发射到信息存储介质的相应多个轨道并检测多个光源 由所述信息存储介质的相应多个轨道反射的光束; 以及控制信号产生单元，用于产生控制信号，该控制信号对由于多个光源之间的波长差，光源之间的光轴上的位移差异或光源之间的距离而产生的像差进行均衡和控制 根据多个反射光束产生的检测信号。