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1. 发明授权

US06496453B2 Optical pickup 失效
标题翻译：光学拾音
公开(公告)号：US06496453B2
公开(公告)日：2002-12-17
申请号：US09817421
申请日：2001-03-26
申请人： Junichi Asada , Kenji Nagashima , Hiroshi Kayama , Youichi Saitoh , Seiji Nishiwaki
发明人： Junichi Asada , Kenji Nagashima , Hiroshi Kayama , Youichi Saitoh , Seiji Nishiwaki
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/1275 , G11B7/1356 , G11B7/1359 , G11B7/1362 , G11B7/1365 , G11B7/1376 , G11B7/1395 , G11B7/1398 , G11B2007/0006
摘要： An optical pickup has a light source that emits a light beam having a far field pattern being elliptical in cross section; a collimator lens that converts the light beam from the light source into a substantially parallel light beam; a beam shaping element that performs beam shaping by changing a substantial aspect ratio of the far field pattern of the light beam from the collimator lens; light condensing means of condensing the light beam shaped by the beam shaping element on an optical information recording medium; and light detecting means of detecting a light beam reflected at the optical information recording medium. wherein the beam shaping element makes the cross section of the light beam having been shaped close to a circle by compressing the light beam substantially in a direction of a major axis of the elliptical cross section of the far field pattern, and reflects the light beam from the collimator lens to the light condensing means.
摘要翻译：光拾取器具有发射具有横截面为椭圆形的远场图案的光束的光源;将来自光源的光束转换为基本上平行的光束的准直透镜;通过以下方式执行光束成形的光束整形元件改变来自准直透镜的光束的远场图案的实质长宽比;将由光束整形元件成形的光束会聚在光信息记录介质上的聚光装置; 光检测装置，用于检测在光学信息记录介质处反射的光束。光束成形元件通过将光束基本上沿着长轴的方向压缩而使光束的截面形状接近圆形，远场图案的椭圆截面，并将来自准直透镜的光束反射到聚光装置。

2. 发明授权

US06674709B1 Optical head apparatus 失效
标题翻译：光头设备
公开(公告)号：US06674709B1
公开(公告)日：2004-01-06
申请号：US09553100
申请日：2000-04-20
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： G11B700
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 fewer parts. Of the output from a semiconductor laser light source, a peripheral component is entered by a light reflection element into an anterior light monitoring photodetector formed in the vicinity of a semiconductor laser light source. Furthermore, the surface of the reflection sphere of the light reflection element is anamorphic, and thus condensed to an appropriate size on the photodetector without being focused, providing high frequency responsivity. Furthermore, the light reflection element is inclined at a predetermined angle to cancel out astigmatic differences of the optical semiconductor laser light source. In addition, the photodetector is placed so that reflected light is bent by an inclination of the light reflection element, reducing the amount of parallel displacement during adjustment of the light reflection element.
摘要翻译：实现具有高频响应性的光量监测和半导体激光器的散光差异校正，具有更少部件的简单配置。在半导体激光源的输出中，通过光反射元件将外围部件输入到形成在半导体激光光源附近的前光监视光检测器中。此外，光反射元件的反射球的表面是变形的，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，提供高频响应度。此外，光反射元件以预定角度倾斜以抵消光半导体激光光源的像散差。此外，光电检测器被放置成使得反射光被光反射元件的倾斜弯曲，从而减少了光反射元件调节期间的平行位移量。

3. 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。

4. 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。

5. 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.

6. 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。

7. 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.

8. 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.

9. 发明授权

US06594042B2 Optical element, optical pickup, information recording and reproducing method, and polarizing hologram 失效
标题翻译：光学元件，光学拾取器，信息记录和再现方法以及偏光全息图
公开(公告)号：US06594042B2
公开(公告)日：2003-07-15
申请号：US10020475
申请日：2001-12-12
申请人： Junichi Asada , Seiji Nishiwaki , Youichi Saitoh
发明人： Junichi Asada , Seiji Nishiwaki , Youichi Saitoh
IPC分类号： G02B532
CPC分类号： G11B7/1353 , G02B5/1833 , G11B7/1275 , G11B2007/0006
摘要： An optical element that receives a first incident light and a second incident light through a main surface and allowing the first and second incident lights to be transmitted therethrough, the first and second incident lights being linearly polarized lights having substantially orthogonal polarizing directions and having different wavelengths &lgr;1 and &lgr;2 respectively, the optical element receiving a first reflected light and a second reflected light generated when the first and second incident lights are reflected from a reflector through the other face, and allowing the first and second reflected lights to be transmitted therethrough again, the optical element has a polarizing hologram that allows the first incident light, the second incident light, and the second reflected light to be transmitted therethrough upon receiving these lights and that diffracts the first reflected light upon receiving this light; and at least one wavelength plate that varies at least one of polarizing states of all of the first incident light and reflected light and polarizing states of all or part of the second incident light and reflected light.
摘要翻译：一种光学元件，其通过主表面接收第一入射光和第二入射光，并允许第一和第二入射光透过其中，第一和第二入射光是具有基本正交的偏振方向且具有不同波长的线偏振光 lambd1和lambd2，所述光学元件接收第一反射光和当所述第一入射光和所述第二入射光通过所述另一面从反射器反射时产生的第二反射光，并且允许所述第一和第二反射光再次透射，光学元件具有偏振全息图，其允许第一入射光，第二入射光和第二反射光在接收到这些光时透射，并且在接收到该光时衍射第一反射光; 以及至少一个波长板，其改变所有第一入射光和反射光的至少一种偏振状态以及第二入射光和反射光的全部或部分的偏振状态。

10. 发明授权

US06898010B2 Beam-shaping device, optical disc device, and fabrication method of beam-shaping device 失效
标题翻译：光束整形装置，光盘装置和光束整形装置的制造方法
公开(公告)号：US06898010B2
公开(公告)日：2005-05-24
申请号：US10242208
申请日：2002-09-12
申请人： Seiji Nishiwaki , Youichi Saitoh , Junichi Asada
发明人： Seiji Nishiwaki , Youichi Saitoh , Junichi Asada
IPC分类号： G11B7/135 , G03B27/48 , G02B5/18
CPC分类号： G03B27/48
摘要： The present invention provides the beam-shaping device which includes a first surface on which is formed a first grating through which a beam of light emitted from a light source on an optical axis passes; and a second surface on which is formed a second grating through which the beam of light having passed through the first surface passes; wherein the first grating and the second grating are designed, so as to maintain, when the wavelength of the emitted beam of light varies, a prescribed relationship between (1) the displacement of the first virtual light emitting point, in the first meridian plane containing the optical axis, and (2) the displacement of the second virtual light emitting point, in the second meridian plane perpendicular to the first meridian plane containing the optical axis.
摘要翻译：本发明提供了一种束形成装置，其包括第一表面，其上形成有第一光栅，光轴从光轴射出的光束通过该第一光栅通过; 以及第二表面，其上形成有通过第一表面的光束通过的第二光栅; 其中，第一光栅和第二光栅被设计成当发射光束的波长变化时，维持（1）第一虚拟光发射点的位移与第一子午线平面中的规定关系光轴，以及（2）在与包含光轴的第一子午线平面垂直的第二子午线平面中的第二虚拟发光点的位移。

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