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1. 发明授权

US06816316B2 Smoothing laser beam integration using optical element motion 有权
公开(公告)号：US06816316B2
公开(公告)日：2004-11-09
申请号：US10366131
申请日：2003-02-12
申请人： George Caudle , Herrmann Glockler , Wayne Brewer
发明人： George Caudle , Herrmann Glockler , Wayne Brewer
IPC分类号： G11B7135
CPC分类号： G02B27/0037 , A61F2009/00872 , G02B26/06 , G02B27/0933 , G02B27/0938 , G02B27/0944 , G02B27/0955 , G02B27/0972 , G02B27/0977
摘要： Embodiments of the present invention provide methods and systems of temporally smoothing the distortion of a light beam caused by imperfections of an optical element or optical system through which the light beam passes. The optical element is moved relative to the light beam to change a position of the imperfections in the path of the light beam to distribute the distortion of the light beam caused by the imperfection without substantially changing the path of the light beam. In some embodiments, the optical element is axially symmetric with respect to its optical axis, and the distortion of the light beam is distributed by rotating the optical element around its optical axis. In some embodiments, the optical element has geometric uniformity relative to a plane or along a line in a plane, and the distortion of the light beam is distributed by moving the optical element along the plane, or along the line of symmetry in the plane.

2. 发明授权

US06584060B1 Optical pick-up device for recording/reading information on optical recording medium 失效
标题翻译：用于在光学记录介质上记录/读取信息的光学拾取装置
公开(公告)号：US06584060B1
公开(公告)日：2003-06-24
申请号：US09344120
申请日：1999-06-24
申请人： Shigeru Oohchida , Hiroshi Akiyama , Masahiko Nakayama
发明人： Shigeru Oohchida , Hiroshi Akiyama , Masahiko Nakayama
IPC分类号： G11B7135
CPC分类号： G11B7/1356 , G02B5/1814 , G02B5/32 , G11B7/1353 , G11B7/1359 , G11B7/1381
摘要： An optical pick-up device for recording/reading an optical recording medium is provided, which can efficiently utilize light emitted from the laser light source. The optical pick-up device includes a light source, an optical system, a quarter-wave plate, a diffraction component, and a photodetector unit. The photodetector unit may further include a transmitting portion for transmitting the light beam emitted from the light source, and may be disposed opposite the light source in a vicinity of the light source so that light emitted from the light source is transmitted through the transmitting portion. The transmitting portion may be an aperture provided in the photodetector unit. Alternatively, the optical pick-up device may further include an optical path separator for separating the diffracted returning light beam from the light beam that passes from the light source to the diffraction component.
摘要翻译：提供了用于记录/读取光学记录介质的光学拾取装置，其可以有效地利用从激光源发射的光。光学拾取装置包括光源，光学系统，四分之一波片，衍射分量和光电检测器单元。光检测器单元还可以包括用于透射从光源发射的光束的透射部分，并且可以在光源附近与光源相对设置，使得从光源发射的光透射通过透射部分。透射部分可以是设置在光电检测器单元中的孔。或者，光学拾取装置还可以包括光路分离器，用于将衍射的返回光束与从光源传播到衍射分量的光束分离。

3. 发明授权

US06504811B1 Optical information storage unit 失效
标题翻译：光信息存储单元
公开(公告)号：US06504811B1
公开(公告)日：2003-01-07
申请号：US09285196
申请日：1999-03-31
申请人： Yasuaki Morimoto
发明人： Yasuaki Morimoto
IPC分类号： G11B7135
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/1365 , G11B11/10543
摘要： An optical information storage unit for reproducing information recorded on lands and grooves of a magneto-optical recording medium by means of a reflected light obtained from a luminous flux which has been emitted from a light source, irradiated onto the recording medium and reflected from the recording medium. The optical information storage unit includes a first wave plate on which the reflected light from the magneto-optical recording medium is incident; a diffraction grating on which the light having been transmitted through the first wave plate is incident; a second wave plate on which the light having been transmitted through the diffraction grating is incident; and a polarization detecting unit on which the light having been transmitted through the second wave plate is incident.
摘要翻译：一种光学信息存储单元，用于通过从光源发射的光束获得的反射光再现记录在磁光记录介质的平面和凹槽上的信息，照射到记录介质上并从记录反射的光中。光学信息存储单元包括来自磁光记录介质的反射光入射的第一波片; 已经透过第一波片的光入射的衍射光栅; 透过衍射光栅的光入射到其上的第二波片; 以及偏振检测单元，其上已经透射通过第二波片的光入射到该偏振光检测单元。

4. 发明授权

US06388967B2 Liquid crystal driving signal generating apparatus and optical disk reproducing apparatus with liquid crystal driving signal generating apparatus 失效
标题翻译：具有液晶驱动信号发生装置的液晶驱动信号发生装置和光盘再现装置
公开(公告)号：US06388967B2
公开(公告)日：2002-05-14
申请号：US09055703
申请日：1998-04-07
申请人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
发明人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
IPC分类号： G11B7135
CPC分类号： G11B7/13927 , G11B7/0956 , G11B7/1369
摘要： A liquid crystal driving signal generating apparatus comprises a PWM signal generator, a low pass filter for limiting a frequency band of a PWM signal outputted from the PWM signal generator, a liquid crystal panel connected to an output of the low pass filter, and a control means for controlling the PWM signal generator. The control means controls the PWM signal generator such that the PWM signal generator generates a PWM signal with a duty ratio corresponding to a refractive index to be set in the liquid crystal panel.
摘要翻译：液晶驱动信号发生装置包括PWM信号发生器，用于限制从PWM信号发生器输出的PWM信号的频带的低通滤波器，连接到低通滤波器的输出的液晶面板，以及控制用于控制PWM信号发生器的装置。控制装置控制PWM信号发生器，使得PWM信号发生器产生一个与在液晶面板中设置的折射率对应的占空比的PWM信号。

5. 发明授权

US06349082B1 Optical disc apparatus 失效
标题翻译：光盘装置
公开(公告)号：US06349082B1
公开(公告)日：2002-02-19
申请号：US09376178
申请日：1999-08-17
申请人： Kazuyoshi Horie , Kuninori Shino , Shigeo Kubota
发明人： Kazuyoshi Horie , Kuninori Shino , Shigeo Kubota
IPC分类号： G11B7135
CPC分类号： G11B7/1362 , G11B7/08564 , G11B7/1365 , G11B7/1384 , G11B11/10543
摘要： Disclosed is an optical disc apparatus compatible with both ROM type and RAM type optical discs having high density and large capacity. An optical disc apparatus includes: a disc control device including an optical disc (a magneto-optical disc), a spindle motor for rotating the optical disc, an objective lens for forming a light spot on the optical disc, and a control drive device which controls and drives the objective lens in the tracking direction of the optical disc, a semiconductor laser serving as a light source, a signal light transfer having a polarization-preserving optical fiber for guiding output light from the semiconductor laser to the objective lens, ¼ wave plates provided in optical paths on both sides of the polarization-preserving optical fiber, and signal detecting devices (polarization beam splitter and photo detectors) for detecting a servo signal, etc. from the reflected light from the optical disc.
摘要翻译：公开了一种与具有高密度和大容量的ROM型和RAM型光盘兼容的光盘装置。一种光盘装置，包括：盘控制装置，包括光盘（磁光盘），用于旋转光盘的主轴电机，用于在光盘上形成光点的物镜;以及控制驱动装置，在光盘的跟踪方向上控制和驱动物镜，用作光源的半导体激光器，具有用于将半导体激光器的输出光引导到物镜的具有偏振保留光纤的信号光传输，¼波设置在偏振保留光纤的两侧的光路中的板，以及用于从光盘的反射光检测伺服信号等的信号检测装置（偏振分束器和光电检测器）。

6. 发明授权

US06333908B2 Optical head having two semiconductor lasers of different wavelength, an objective lens focusing laser beams on different thickness substrates, and an annular phase shifter decreasing focused laser beam spot aberration 有权
公开(公告)号：US06333908B2
公开(公告)日：2001-12-25
申请号：US09768310
申请日：2001-01-25
申请人： Takeshi Shimano , Akira Arimoto
发明人： Takeshi Shimano , Akira Arimoto
IPC分类号： G11B7135
CPC分类号： G11B7/127 , G11B7/0909 , G11B7/12 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens and an optical head including the objective lens for reading information contained on substrates having different thicknesses using laser beams having different wavelengths. The objective lens includes an annular phase shifter for decreasing an aberration of a focused spot of each of the laser beams. The annular phase shifter can be optimally combined with the objective lens having inner and outer regions each having a different substrate thicknesses.

7. 发明授权

US06243334B1 Information reading and writing device for optical disk 有权
标题翻译：光盘信息读写装置
公开(公告)号：US06243334B1
公开(公告)日：2001-06-05
申请号：US09177561
申请日：1998-10-23
申请人： Shinya Hasegawa , Hiroyasu Yoshikawa
发明人： Shinya Hasegawa , Hiroyasu Yoshikawa
IPC分类号： G11B7135
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/0908 , G11B7/0916 , G11B7/094 , G11B7/123 , G11B7/1353 , G11B7/22
摘要： The present invention relates to an information reading and writing device for an optical signal, and the optical system is simplified by using a diffraction optical element. A semiconductor laser is used as a light source. There is provided an image formation lens for condensing a beam of light and forming an image on an optical disk medium. In an optical path between the semiconductor laser and the image formation lens, there is provided a hologram having a function of the hologram region diffraction optical element for detecting a tracking error signal of the medium and a focus detection error signal. Two optical detecting elements 24a, 24b for detecting the focus error respectively have two divided regions. Under the condition that the medium is in focus, beams of light diffracted in the two hologram regions 23a, 23b for detecting the focus become the convergent beams which are most converged on a dividing line of the respective optical detecting element and in the direction of the optical axis. The beams of light on two optical detecting elements are in a condition of substantial point symmetry with respect to the central axis of the hologram.
摘要翻译：本发明涉及一种用于光信号的信息读写装置，通过使用衍射光学元件来简化光学系统。半导体激光器用作光源。提供了一种用于聚集光束并在光盘介质上形成图像的图像形成透镜。在半导体激光器和图像形成透镜之间的光路中，提供了具有用于检测介质的跟踪误差信号的全息区域衍射光学元件的功能的全息图和焦点检测误差信号。用于检测聚焦误差的两个光学检测元件24a，24b分别具有两个分割区域。在介质聚焦的条件下，在用于检测聚焦的两个全息图区域23a，23b中衍射的光束成为最聚焦在各个光学检测元件的分割线上并沿着该方向的收敛光束光轴。两个光学检测元件上的光束相对于全息图的中心轴处于基本点对称的状态。

8. 发明授权

US06717906B1 Optical disk apparatus to perform either reproduction or reproduction/recording of each of at least two kinds of optical disks having different substrate thicknesses 失效
标题翻译：光盘装置，用于对具有不同基板厚度的至少两种光盘执行再现或再现/记录
公开(公告)号：US06717906B1
公开(公告)日：2004-04-06
申请号：US09614191
申请日：2000-07-11
申请人： Takeshi Shimano
发明人： Takeshi Shimano
IPC分类号： G11B7135
CPC分类号： G11B7/1392 , G11B7/1374 , G11B2007/0006
摘要： To permit reproduction of a CD-R and the reproduction of a DVD in a compatible manner, both the aberration introduced by a substrate of a DVD having a 0.6 mm thickness and the aberration introduced by a substrate of a CD having a 1.2 mm thickness are reduced by a lens shape design where corresponding substrate thicknesses of the inner and outer regions of the objective lens are made different, and providing, in the inner region thereof, a protruding circular phase shifter and, also in a verge of the inner region, an annular phase shifter. The aberration of the objective lens in the CD reproduction was further decreased and the NA was increased up to 0. S, so that the recording of the CD-R was made possible.
摘要翻译：为了允许以兼容的方式再现CD-R和再现DVD，由厚度为0.6mm的DVD的基板引入的像差和由具有1.2mm厚度的CD的基板引入的像差都是减少了透镜形状设计，使得物镜的内部和外部区域的对应的衬底厚度不同，并且在其内部区域中提供突出的圆形移相器，并且还在内部区域的边缘环形移相器。 CD再现中的物镜的像差进一步降低，并且NA增加到0.S，使得CD-R的记录成为可能。

9. 发明授权

US06618344B1 Optical pickup apparatus having improved holographic optical element and photodetector 失效
标题翻译：具有改进的全息光学元件和光电检测器的光学拾取装置
公开(公告)号：US06618344B1
公开(公告)日：2003-09-09
申请号：US09494549
申请日：2000-01-31
申请人： Hiroyoshi Funato
发明人： Hiroyoshi Funato
IPC分类号： G11B7135
CPC分类号： G11B7/0903 , G01B9/021 , G02B5/203 , G02B5/32 , G11B7/0909 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup apparatus includes first and second light sources which selectively emit one of first and second light beams, the first and second light beams being different in wavelength, the wavelengths of the first and second light beams being appropriate for accessing first and second optical disks respectively. A coupling lens converts a corresponding one of the first and second light beams into a collimated beam. An objective lens forms a light spot on a corresponding one of the first and second optical disks by focusing the collimated beam. A holographic optical element receives a reflection beam of the light spot from one of the first and second optical disks and provides holographic effects on the reflection beam so as to diffract the reflection beam in predetermined diffracting directions depending on the wavelength of the reflection beam. A photodetector receives the reflection beam from the holographic optical element at light receiving areas and outputs signals indicative of respective intensities of the received reflection beam at the light receiving areas, so that a focusing error signal and a tracking error signal are generated based on the signals.
摘要翻译：一种光学拾取装置包括：第一和第二光源，其选择性地发射第一和第二光束中的一个，第一和第二光束的波长不同，第一和第二光束的波长适合于访问第一和第二光盘分别。耦合透镜将第一和第二光束中的相应一个光束转换为准直光束。物镜通过聚焦准直光束在相应的第一和第二光盘上形成光点。全息光学元件从第一和第二光盘之一接收光点的反射光束，并且在反射光束上提供全息效果，以便根据反射光束的波长在预定的衍射方向衍射反射光束。光接收器在光接收区域处接收来自全息光学元件的反射光束，并输出表示在光接收区域处的接收反射光束的各自强度的信号，从而基于信号产生聚焦误差信号和跟踪误差信号。

10. 发明授权

US06493307B2 OPTICAL HEAD HAVING TWO SEMICONDUCTOR LASERS OF DIFFERENT WAVELENGTH, AN OBJECTIVE LENS FOCUSING LASER BEAMS ON DIFFERENT THICKNESS SUBSTRATES, AND AN ANNULAR PHASE SHIFTER DECREASING FOCUSED LASER BEAM SPOT ABERRATION 有权
标题翻译：具有不同波长的两个半导体激光器的光学头，在不同厚度的基底上聚焦激光束的目标透镜，以及安全相位减少聚焦的激光束点抛光
公开(公告)号：US06493307B2
公开(公告)日：2002-12-10
申请号：US10086723
申请日：2002-03-04
申请人： Takeshi Shimano , Akira Arimoto
发明人： Takeshi Shimano , Akira Arimoto
IPC分类号： G11B7135
CPC分类号： G11B7/127 , G11B7/0909 , G11B7/12 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens and an optical head including the objective lens for reading information contained on substrates having different thicknesses using laser beams having different wavelengths. The objective lens includes an annular phase shifter for decreasing an aberration of a focused spot of each of the laser beams. The annular phase shifter can be optimally combined with the objective lens having inner and outer regions each having a different substrate thicknesses.
摘要翻译：一种物镜和光学头，包括用于使用具有不同波长的激光束读取包含在具有不同厚度的基板的信息的物镜。物镜包括用于减少每个激光束的聚焦光点的像差的环形移相器。环形移相器可以与具有各自具有不同衬底厚度的内部和外部区域的物镜进行最佳组合。

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