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1. 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.

2. 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。

3. 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。

4. 发明授权

US07142489B2 Optical disk device with photodetector 有权
标题翻译：带光电检测器的光盘设备
公开(公告)号：US07142489B2
公开(公告)日：2006-11-28
申请号：US10530585
申请日：2003-10-16
申请人： Seiji Nishiwaki , Kazuo Momoo , Youichi Saitoh
发明人： Seiji Nishiwaki , Kazuo Momoo , Youichi Saitoh
IPC分类号： G11B7/00
CPC分类号： G11B7/133 , G11B7/0943 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical disk device is provided that can realize favorable recording/reproduction of signals on/from an optical disk having a plurality of signal planes arranged in proximity to each other. In this optical disk device, a hologram (4) is divided into n(n≧2) regions Ak(k=1, 2, . . . , n) by a straight line that intersects with an optical axis, and a photodetector (7) is divided into at least two regions A and A′. Light emitted from a light source (1) is focused on a signal plane (6a) or (6b) included in a plurality of signal planes of the optical disk by an objective lens (5). Light reflected from a first signal plane (6a) and light reflected from a second signal plane (6b) pass through the objective lens (5) to turn into light beams a and a′, respectively, that enter the hologram (4). 1st-order diffracted light beams ak and ak′ having a common diffraction optical axis are derived from the light beams a and a′ that have entered the regions Ak of the hologram (4), respectively, and are projected on the photodetector (7). Distributions of the 1st-order diffracted light beams ak and ak′ on the photodetector (7) are approximately inverted with respect to an intersection point of the diffraction optical axis and a detection plane. The 1st-order diffracted light beam ak is approximately within the region A and the 1st-order diffracted light beam ak′ is approximately within the region A′.
摘要翻译：提供了一种光盘装置，其可以实现具有彼此靠近布置的多个信号面的光盘的信号的良好记录/再现。在该光盘装置中，通过与光轴相交的直线将全息图（4）分割成n（n> = 2）个区域Ak（k = 1,2，...，n），以及光检测器（7）被分成至少两个区域A和A'。从光源（1）发射的光通过物镜（5）聚焦在包括在光盘的多个信号平面中的信号平面（6a）或（6b）上。从第一信号面（6a）反射的光和从第二信号面（6b）反射的光分别通过物镜（5）转变成进入全息图（4）的光束a和a' 。分别从已经进入全息图（4）的区域Ak的光束a和a'导出具有共同的衍射光轴的1级衍射光束ak和ak'并投影在光电检测器（7）上，。在光检测器（7）上的1级衍射光束ak和ak'的分布相对于衍射光轴和检测平面的交点近似倒置。 1级衍射光束ak大致在区域A内，1级衍射光束ak'大致在区域A'内。

5. 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.

6. 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.

7. 发明申请

US20060013107A1 Optical disc device 有权
标题翻译：光盘设备
公开(公告)号：US20060013107A1
公开(公告)日：2006-01-19
申请号：US10530585
申请日：2003-10-16
申请人： Seiji Nishiwaki , Kazuo Momoo , Youichi Saitoh
发明人： Seiji Nishiwaki , Kazuo Momoo , Youichi Saitoh
IPC分类号： G11B7/00
CPC分类号： G11B7/133 , G11B7/0943 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical disk device is provided that can realize favorable recording/reproduction of signals on/from an optical disk having a plurality of signal planes arranged in proximity to each other. In this optical disk device, a hologram (4) is divided into n(n≧2) regions Ak(k=1, 2, . . . , n) by a straight line that intersects with an optical axis, and a photodetector (7) is divided into at least two regions A and A′. Light emitted from a light source (1) is focused on a signal plane (6a) or (6b) included in a plurality of signal planes of the optical disk by an objective lens (5). Light reflected from a first signal plane (6a) and light reflected from a second signal plane (6b) pass through the objective lens (5) to turn into light beams a and a′, respectively, that enter the hologram (4). 1st-order diffracted light beams ak and ak′ having a common diffraction optical axis are derived from the light beams a and a′ that have entered the regions Ak of the hologram (4), respectively, and are projected on the photodetector (7). Distributions of the 1st-order diffracted light beams ak and ak′ on the photodetector (7) are approximately inverted with respect to an intersection point of the diffraction optical axis and a detection plane. The 1st-order diffracted light beam ak is approximately within the region A and the 1st-order diffracted light beam ak′ is approximately within the region A′.
摘要翻译：提供了一种光盘装置，其可以实现具有彼此靠近布置的多个信号面的光盘的信号的良好记录/再现。在该光盘装置中，通过与光轴相交的直线将全息图（4）分割成n（n> = 2）个区域Ak（k = 1,2，...，n），以及光检测器（7）被分成至少两个区域A和A'。从光源（1）发射的光通过物镜（5）聚焦在包括在光盘的多个信号平面中的信号平面（6a）或（6b）上。从第一信号面（6a）反射的光和从第二信号面（6b）反射的光分别通过物镜（5）转变成进入全息图（4）的光束a和a' 。分别从已经进入全息图（4）的区域Ak的光束a和a'导出具有共同的衍射光轴的1级衍射光束ak和ak'并投影在光电检测器（7）上，。在光检测器（7）上的1级衍射光束ak和ak'的分布相对于衍射光轴和检测平面的交点近似倒置。 1级衍射光束ak大致在区域A内，1级衍射光束ak'大致在区域A'内。

8. 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。

9. 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。

10. 发明申请

US20050226120A1 Information processing device and information recording medium 失效
标题翻译：信息处理装置和信息记录介质
公开(公告)号：US20050226120A1
公开(公告)日：2005-10-13
申请号：US11100028
申请日：2005-04-06
申请人： Seiji Nishiwaki , Kazuo Momoo
发明人： Seiji Nishiwaki , Kazuo Momoo
IPC分类号： G03H1/04 , G03H1/22 , G11B7/00 , G11B7/0065 , G11B7/125
CPC分类号： G11B7/0065 , G03H2001/0415 , G03H2250/42 , G11B7/128
摘要： There is provided an information processing device which is capable of suppressing generation of stray light at the time of recording and reproduction of information, thus enabling quality information recording and reproduction. The information processing device includes: a radiation light source 2; and a converging section for converging rays emitted from the light source toward an information recording medium having a photosensitive layer 11b, wherein the converging section splits the rays into first and second rays 3′ and 3 respectively traveling through first and second spaces as divided by a plane at least containing a point optical axis L, and converges the first and second rays 3′ and 3 onto first and second points 12′ and 12 in the information recording medium 11, the photosensitive layer 11b being interposed between the first and second points 12′ and 12. Between the first and second points 12′ and 12, the first and second rays 3′ and 3 interfere with each other to form interference fringes, the interference fringes representing information to be recorded in the photosensitive layer 11b of the information recording medium 11.
摘要翻译：提供了一种信息处理装置，其能够抑制在记录和再现信息时的杂散光的产生，从而实现质量信息的记录和再现。信息处理装置包括：辐射光源2; 以及会聚部分，用于将从光源发射的光线朝向具有感光层11b的信息记录介质会聚，其中会聚部分将光线分裂成分别穿过第一和第二空间的第一和第二光线3'和3，除以至少包含点光轴L的平面，并且将第一和第二光线3'和3收敛在信息记录介质11中的第一和第二点12'和12上，感光层11b介于第一和第二 12点和12点。在第一和第二点12'和12之间，第一和第二射线3'和3彼此干涉以形成干涉条纹，干涉条纹表示要记录在信息记录介质11的感光层11b中的信息。

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