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1. 发明授权

US08085626B2 Optical pickup device and lens for optical pickup 失效
标题翻译：用于光学拾取器的光学拾取装置和透镜
公开(公告)号：US08085626B2
公开(公告)日：2011-12-27
申请号：US12628555
申请日：2009-12-01
申请人： Yuichi Takahashi , Fumitake Sakai , Yukio Hibino , Koichi Muramatsu , Kazuo Momoo
发明人： Yuichi Takahashi , Fumitake Sakai , Yukio Hibino , Koichi Muramatsu , Kazuo Momoo
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/1378 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup device according to the present invention comprises: a first mirror for reflecting a first light beam outputted from a first light source and letting a second light beam outputted from a second light source pass therethrough; a first object lens for converging the first light beam reflected by the first mirror on an information recording surface of a recording medium; a second mirror for reflecting the second light beam passing through the first mirror; a second object lens for converging the second light beam reflected by the second mirror on the information recording surface of the recording medium; and an achromatic lens for correcting an axial chromatic aberration of the second object lens generated by wavelength variation of the second light beam, wherein the achromatic lens is provided in an optical path between the first mirror and the second mirror.
摘要翻译：根据本发明的光拾取装置包括：用于反射从第一光源输出的第一光束并使从第二光源输出的第二光束通过的第一反射镜; 第一物镜，用于将由第一反射镜反射的第一光束会聚在记录介质的信息记录表面上; 用于反射通过第一反射镜的第二光束的第二反射镜; 用于将由第二反射镜反射的第二光束会聚在记录介质的信息记录表面上的第二物镜; 以及用于校正由第二光束的波长变化产生的第二物镜的轴向色差的消色差透镜，其中，所述消色差透镜设置在所述第一反射镜和所述第二反射镜之间的光路中。

2. 发明授权

US06914870B2 Optical head apparatus 失效
标题翻译：光头设备
公开(公告)号：US06914870B2
公开(公告)日：2005-07-05
申请号：US10630304
申请日：2003-07-30
申请人： Junichi Asada , Seiji Nishiwaki , Yuichi Takahashi , Kenji Nagashima , Hiroaki Matsumiya , Youichi Saitoh , Kazuo Momoo
发明人： Junichi Asada , Seiji Nishiwaki , Yuichi Takahashi , Kenji Nagashima , Hiroaki Matsumiya , Youichi Saitoh , Kazuo Momoo
IPC分类号： G02B5/32 , G11B7/09 , G11B7/125 , G11B7/13 , G11B7/135 , G11B7/00
CPC分类号： G11B7/1263 , G11B7/1362 , G11B7/1378 , G11B7/1398 , G11B2007/13725
摘要： To implement light quantity monitoring with high frequency responsivity and correction of astigmatic differences of a semiconductor laser with a simple configuration with a fewer parts.Of the light beam output from a semiconductor laser light source 101, a peripheral beam component is entered by a light reflection element 107 into an anterior light monitoring photodetector 103 formed in the vicinity of a semiconductor laser light source 101. Furthermore, the surface of the reflection sphere of the light reflection element is formed anamorphic, and thus condensed to an appropriate size on the photodetector without being focused, providing high frequency responsivity. Furthermore, the light reflection element 107 is placed inclined at a predetermined angle so as to cancel out astigmatic difference of the optical semiconductor laser light source 101. In addition, the photodetector 103 is placed in the direction so that a reflected light 108 is bent by an inclination of the light reflection element 107, reducing the amount of parallel displacement during adjustment of the light reflection element 107.
摘要翻译：实现具有高频率响应性的光量监测和半导体激光器的散光差异的校正，具有更少部件的简单配置。在从半导体激光光源101输出的光束中，通过光反射元件107将周边光束分量输入到形成在半导体激光光源101附近的前光监视光电检测器103中。此外，光反射元件的反射球的表面形成为变形的，并因此在不被聚焦的情况下在光电检测器上聚光到适当的尺寸，从而提供高频响应度。此外，光反射元件107以预定角度倾斜放置，以抵消光半导体激光源101的像散差。此外，光电检测器103被放置成使得反射光108被光反射元件107的倾斜弯曲，从而减少了光反射元件107的调节期间的平行移动量。

3. 发明授权

US06888787B2 Optical information processor and optical element 有权
标题翻译：光信息处理器和光学元件
公开(公告)号：US06888787B2
公开(公告)日：2005-05-03
申请号：US10617167
申请日：2003-07-10
申请人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
发明人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
IPC分类号： G11B7/09 , G11B7/135 , G11B7/00
CPC分类号： G11B7/139 , G11B7/1353
摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.
摘要翻译：光盘装置在从半导体激光器到形成大于来自光盘的返回路径的孔径的光盘的入射路径中具有物镜的孔径，或者在记录和重放中变化。这种配置改善了记录/再现能力，因为光聚焦在具有高数值孔径的光盘上。此外，由于以较低的数值孔径检测出来自光盘的反射光，因此不会降低用于倾斜和散焦的余量。此外，由于可以消除包含在反射光中的不必要的信号分量，信息信号的S / N（信噪比）也增加。因此，可以获得高性能光盘装置。或者，通过在记录和再现中改变物镜的孔径，可以获得其中增加记录密度和记录质量而不恶化再现质量的光盘装置。

4. 发明授权

US08619522B2 Optical pickup and optical read/write apparatus 有权
标题翻译：光学拾取和光学读/写设备
公开(公告)号：US08619522B2
公开(公告)日：2013-12-31
申请号：US13535633
申请日：2012-06-28
申请人： Yuichi Takahashi , Kazuo Momoo , Jun-ichi Asada
发明人： Yuichi Takahashi , Kazuo Momoo , Jun-ichi Asada
IPC分类号： G11B7/00
CPC分类号： G11B7/00458 , G11B7/003 , G11B7/133 , G11B7/1353
摘要： In one embodiment, an optical pickup includes an optical system which forms multiple light beams based on the light emitted from a light source and which converges a write beam and a read beam, thereby forming a main spot and a sub-spot, respectively, on an optical storage medium. This optical system converges the write and read beams onto the optical storage medium so that the main spot moves through the same region on the optical storage medium ahead of the sub-spot. The optical pickup further includes a detector for sensing the write and read beams reflected from the storage medium. The detector includes a first photodiode 10 that receives the reflected light from the main spot 50R on the storage medium and a second photodiode 11 that receives a portion of the reflected light from the sub-spot 51R.
摘要翻译：在一个实施例中，光学拾取器包括基于从光源发射的光形成多个光束并且会聚写入光束和读取光束的光学系统，从而分别形成主光点和子光点光学存储介质。该光学系统将写入和读取光束会聚到光学存储介质上，使得主光点移动到子光点之前的光学存储介质上的相同区域。光学拾取器还包括用于感测从存储介质反射的写入和读出光束的检测器。检测器包括接收来自存储介质上的主光斑50R的反射光的第一光电二极管10和接收来自子光点51R的一部分反射光的第二光电二极管11。

5. 发明授权

US08462596B2 Optical pickup device and optical disc device 有权
标题翻译：光拾取装置和光盘装置
公开(公告)号：US08462596B2
公开(公告)日：2013-06-11
申请号：US13511017
申请日：2010-11-24
申请人： Yuichi Takahashi , Kazuo Momoo , Hiroaki Matsumiya , Jun-ichi Asada
发明人： Yuichi Takahashi , Kazuo Momoo , Hiroaki Matsumiya , Jun-ichi Asada
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1353 , G11B7/1381 , G11B2007/0013
摘要： When performing recording/reproduction of information for a given recording layer of an optical disc having three recording layers, influences of reflected light from other recording layers are reduced or removed, thus making it possible to obtain a more stable RF signal or focus error signal.An optical pickup device includes a light source, a collimator lens, an objective lens, a photodetector, and a light shielding member. Among the recording layers of the optical disc, a first layer and a second layer adjoining each other are disposed in the order of the first layer and second layer from near the objective lens. The light shielding member is disposed at a position satisfying the condition d>d1 to block a part of reflected light from the second layer when light is converged on the first layer, where d is an optical path length from the photodetector to the light shielding member; and d1 is a distance from the photodetector to a position at which reflected light from the second layer becomes focused between the collimator lens and the photodetector.
摘要翻译：当对具有三个记录层的光盘的给定记录层执行信息的记录/再现时，减少或去除来自其它记录层的反射光的影响，从而可以获得更稳定的RF信号或聚焦误差信号。光学拾取装置包括光源，准直透镜，物镜，光电检测器和遮光构件。在光盘的记录层中，邻接的第一层和第二层以物镜附近的第一层和第二层的顺序设置。光遮蔽构件设置在满足条件d> d1的位置，以便当光聚焦在第一层上时阻挡来自第二层的反射光的一部分，其中d是从光电检测器到遮光构件的光路长度 ; d1是从光电检测器到第二层的反射光在准直透镜和光电检测器之间聚焦的位置的距离。

6. 发明授权

US06920101B2 Optical information processor and optical element 有权
公开(公告)号：US06920101B2
公开(公告)日：2005-07-19
申请号：US10616859
申请日：2003-07-10
申请人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
发明人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
IPC分类号： G11B7/09 , G11B7/135 , G11B7/00
CPC分类号： G11B7/139 , G11B7/1353
摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.

7. 发明授权

US06618343B1 Optical information processor and optical element 有权
标题翻译：光信息处理器和光学元件
公开(公告)号：US06618343B1
公开(公告)日：2003-09-09
申请号：US09436847
申请日：1999-11-09
申请人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
发明人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
IPC分类号： G11B700
CPC分类号： G11B7/139 , G11B7/1353
摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.
摘要翻译：光盘装置在从半导体激光器到形成大于来自光盘的返回路径的孔径的光盘的入射路径中具有物镜的孔径，或者在记录和重放中变化。这种配置改善了记录/再现能力，因为光聚焦在具有高数值孔径的光盘上。此外，由于以较低的数值孔径检测出来自光盘的反射光，因此不会降低用于倾斜和散焦的余量。此外，由于可以消除包含在反射光中的不必要的信号分量，信息信号的S / N（信噪比）也增加。因此，可以获得高性能光盘装置。或者，通过在记录和再现中改变物镜的孔径，可以获得其中增加记录密度和记录质量而不恶化再现质量的光盘装置。

8. 发明授权

US08514679B2 Optical information record/playback device 有权
标题翻译：光信息记录/播放设备
公开(公告)号：US08514679B2
公开(公告)日：2013-08-20
申请号：US13277218
申请日：2011-10-20
申请人： Yuichi Takahashi , Kazuo Momoo
发明人： Yuichi Takahashi , Kazuo Momoo
IPC分类号： G11B7/00
CPC分类号： G11B7/1263
摘要： An optical information record/playback device of the present invention includes: a light source; a current driver for supplying current to the light source; an optical system for condensing light from the light source onto a recording medium; a monitoring section for monitoring light emission power of the light source; a current driver control section for controlling output current of the current driver; and an arithmetic/control section for controlling an operation of the current driver control section. Before recording information, the arithmetic/control section sequentially conducts a first test light-emission to cause the light source to emit light by using a closed loop circuit and a second test light-emission to cause the light source to emit light by using an open loop circuit, and compares first and second sampling values, which are respectively obtained by sampling the outputs of the monitoring section during the first and second test light-emissions.
摘要翻译：本发明的光信息记录/重放装置包括：光源; 用于向光源提供电流的电流驱动器; 用于将来自光源的光聚光到记录介质上的光学系统; 用于监视光源的发光功率的监视部分; 用于控制当前驱动器的输出电流的电流驱动器控制部分; 以及用于控制当前驾驶员控制部分的操作的算术/控制部分。在记录信息之前，算术/控制部分顺序地进行第一测试发光，以通过使用闭环电路和第二测试发光来使光源发光，以使光源通过使用开路循环电路，并且比较通过在第一和第二测试光发射期间对监视部分的输出进行采样而分别获得的第一和第二采样值。

9. 发明授权

US06930972B2 Optical information processor and optical element 有权
公开(公告)号：US06930972B2
公开(公告)日：2005-08-16
申请号：US10617084
申请日：2003-07-10
申请人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
发明人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
IPC分类号： G11B7/09 , G11B7/135 , G11B7/00
CPC分类号： G11B7/139 , G11B7/1353
摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.

10. 发明授权

US06819647B2 Optical information processor and optical element 有权
公开(公告)号：US06819647B2
公开(公告)日：2004-11-16
申请号：US10617168
申请日：2003-07-10
申请人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
发明人： Youichi Saitoh , Junichi Asada , Yuichi Takahashi , Seiji Nishiwaki , Kenji Nagashima , Kazuo Momoo , Junji Nagaoka
IPC分类号： G11B700
CPC分类号： G11B7/139 , G11B7/1353
摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.

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