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1. 发明授权

US07064898B1 Optoelectronic device 有权
标题翻译：光电器件
公开(公告)号：US07064898B1
公开(公告)日：2006-06-20
申请号：US10129809
申请日：2000-11-08
申请人： Shoichi Takasuka , Shin'ichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa
发明人： Shoichi Takasuka , Shin'ichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa
IPC分类号： G02B5/18 , G02B27/44
CPC分类号： G11B7/1263 , G11B7/0903 , G11B7/123 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B7/1395
摘要： An optoelectronic device that provides an excellent reproduction signal and a stable servo control while preventing deterioration of S/N ratio caused by stray light. The optoelectronic device has a semiconductor laser (101) that emits light beams on an information-recording medium (105), a hologram optical element (102) having a diffraction grating region (108) and located between the semiconductor laser (101) and the information-recording medium (105), and a photodetector (106) for receiving light that is diffracted at the diffraction grating region (108) of the hologram optical element (102), among returning light beams from the information-recording medium (105), and the optoelectronic device has also a diffraction grating region (107) in the vicinity of the diffraction grating region (108) of the hologram optical element (102) so as to prevent stray light other than diffracted light from the diffraction grating region (108) from entering the photodetector (106).
摘要翻译：提供优异的再现信号和稳定的伺服控制的光电子器件，同时防止由杂散光引起的S / N比的劣化。该光电子器件具有在信息记录介质（105）上发射光束的半导体激光器（101），具有衍射光栅区域（108）并且位于半导体激光器（101）和信息记录介质（105）和用于接收在全息图光学元件（102）的衍射光栅区域（108）处衍射的光的光电检测器（106），在从信息记录介质（105）返回的光束中，，并且光电子器件在全息光学元件（102）的衍射光栅区域（108）附近还具有衍射光栅区域（107），以防止来自衍射光栅区域（108）的衍射光以外的杂散光）进入光电检测器（106）。

2. 发明授权

US06947213B2 Diffractive optical element that polarizes light and an optical pickup using the same 失效
$Diffractive optical element that polarizes light and an optical pickup using the same$
标题翻译：使光偏振的衍射光学元件和使用其的光学拾取器
公开(公告)号：US06947213B2
公开(公告)日：2005-09-20
申请号：US10774960
申请日：2004-02-09
申请人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Teruhiro Shiono
发明人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Teruhiro Shiono
IPC分类号： G02B5/18 , G02B5/30 , G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B11/10543 , G02B5/1809 , G02B5/1819 , G02B5/3025 , G02B27/4238 , G02B27/4277 , G11B7/123 , G11B7/1353 , G11B7/1395
摘要： A first diffractive optical element pattern with a pattern pitch that is no greater than a wavelength of incident light is formed on a first main surface of substrate such as a glass plate. Second diffractive optical element patterns are formed at positions that are respectively incident to positive first-order diffracted light and negative first-order diffracted light produced by the first diffractive optical element pattern. Negative first-order diffracted light produced by each second diffractive optical element pattern is incident upon a boundary face of the substrate at an angle that is smaller than the critical angle, and so exits the substrate.
摘要翻译：在诸如玻璃板的基板的第一主表面上形成具有不大于入射光的波长的图案间距的第一衍射光学元件图案。第二衍射光学元件图案形成在分别入射到由第一衍射光学元件图案产生的正一级衍射光和负一级衍射光的位置处。由每个第二衍射光学元件图案产生的负一级衍射光以小于临界角的角度入射到衬底的边界面上，并且因此离开衬底。

3. 发明授权

US06747939B2 Semiconductor laser device and optical pickup device using the same 失效
标题翻译：半导体激光器件和使用其的光学拾取器件
公开(公告)号：US06747939B2
公开(公告)日：2004-06-08
申请号：US09793675
申请日：2001-02-26
申请人： Yukio Saitoh , Shoichi Takasuka , Naoki Nakanishi , Hideyuki Nakanishi
发明人： Yukio Saitoh , Shoichi Takasuka , Naoki Nakanishi , Hideyuki Nakanishi
IPC分类号： G11B700
CPC分类号： G11B7/123
摘要： A semiconductor laser device is provided which can carry out recording and reproduction with respect to optical disks with different formats. In this semiconductor laser device, a receiving/emitting optics integrated substrate, in which two semiconductor laser elements with different emission wavelengths and a plurality of receiving optics are integrated, is disposed in a case and is sealed with a hologram element. A composite prism is placed on the hologram element. The distances, when measured in air, from the two semiconductor laser elements to a focusing means, for example, a collimator lens are set to be substantially equal. Thus, a small and inexpensive semiconductor laser device can be obtained. In addition, a single collimator lens can be employed, and thus the optical configuration is facilitated.
摘要翻译：提供一种能够对不同格式的光盘执行记录和再现的半导体激光装置。在该半导体激光器件中，将具有不同发射波长的两个半导体激光元件和多个接收光学元件集成在一起的接收/发射光学器件集成基板设置在壳体中并用全息元件密封。复合棱镜放置在全息元件上。在空气中测量时，从两个半导体激光元件到聚焦装置（例如准直透镜）的距离被设定为基本相等。因此，可以获得小而便宜的半导体激光器件。另外，可以采用单个准直透镜，因此有助于光学结构。

4. 发明授权

US06735024B2 Optical pickup with improved optical properties 失效
标题翻译：具有改善光学性能的光学拾取器
公开(公告)号：US06735024B2
公开(公告)日：2004-05-11
申请号：US10263166
申请日：2002-10-02
申请人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Kazutoshi Onozawa , Kazuhiko Yamanaka , Naoki Nakanishi
发明人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Kazutoshi Onozawa , Kazuhiko Yamanaka , Naoki Nakanishi
IPC分类号： G02B702
CPC分类号： G11B7/0933 , G11B7/0932 , G11B7/0935 , G11B7/123 , G11B7/22 , H01L2224/48091 , H01L2224/48227 , H01L2924/00014
摘要： A movable enclosure contains optical components, such as an objective lens, a semiconductor laser, a mirror, and a photodetector. The movable enclosure is supported by a fixed member via a plurality of wires that are positioned in parallel. This construction allows the movable enclosure to move in a tracking direction and a focusing direction. The plurality of wires are insulated from one another to be also used as power-supplying lines and signal lines for the semiconductor laser and the photodetector.
摘要翻译：可移动的外壳包含诸如物镜，半导体激光器，反射镜和光电检测器的光学部件。可移动外壳经由多个平行定位的导线由固定构件支撑。这种结构允许可动外壳沿跟踪方向和聚焦方向移动。多根导线彼此绝缘，也用作半导体激光器和光电检测器的供电线和信号线。

5. 发明授权

US06728035B2 Optical device with diffraction grating having plural grating regions 失效
$Optical device with diffraction grating having plural grating regions$
标题翻译：具有衍射光栅的光学器件具有多个光栅区域
公开(公告)号：US06728035B2
公开(公告)日：2004-04-27
申请号：US10251471
申请日：2002-09-20
申请人： Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa , Naoki Nakanishi
发明人： Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa , Naoki Nakanishi
IPC分类号： G02B518
CPC分类号： G11B7/1353 , G02B5/1866 , G11B7/0903 , G11B7/123 , G11B7/1356 , G11B11/10543 , G11B11/10576
摘要： An optical device includes a light-emitting element for irradiating light onto an information recording medium, a diffraction grating for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member for focussing the plurality of beams onto the information recording medium, a deflection member for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or −1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.
摘要翻译：光学装置包括用于将光照射到信息记录介质上的发光元件，用于将从所述发光元件发射的光分解为多个光束的衍射光栅，用于将多个光束聚焦到信息记录上的聚焦部件介质，用于在已经从信息记录介质反射之后偏转多个光束的偏转构件; 以及用于在被偏转构件偏转之后接收多个光束的光电检测器。衍射光栅具有第一光栅区域和第二光栅区域，其具有不同的衍射效率。将第一光栅区域中的零级衍射光用作再现信息信号的主光束，并且将第二光栅区域中的+ 1级或-1级衍射光用作用于再现跟踪误差信号。因此，在不增加半导体激光元件1的发光的同时，可以增加主光束和子光束的光量，并且可以提高主光束和子光束的S / N比。

6. 发明授权

US07139235B2 Optical element with diffraction grating, semiconductor device, and optical information recording device employing the same 失效
$Optical element with diffraction grating, semiconductor device, and optical information recording device employing the same$
标题翻译：具有衍射光栅的光学元件，半导体器件和采用该光学元件的光学信息记录装置
公开(公告)号：US07139235B2
公开(公告)日：2006-11-21
申请号：US10070288
申请日：2001-07-04
申请人： Naoki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi
发明人： Naoki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0912 , G11B7/0943 , G11B7/123 , G11B7/131 , H01S5/02248 , H01S5/02296
摘要： An optical semiconductor device comprising an emitted beam branching section (61) which branches an emitted light beam from a laser device (51), a reflected light beam branching section (71) which branches a reflected light beam from an information recording medium (3) into light beams different from each other in focused state, servo signal sensing photodetectors (43, 45) which receive the branched reflected light beam in a defocused state, a first diffraction grating provided in the emitted light beam branching section for diffracting the reflected light beam having passed through the reflected light beam flux branching section, and a signal sensing photodetector (47) which receives the reflected light beam diffracted by the first diffraction grating.
摘要翻译：一种光学半导体装置，包括从激光装置（51）分支发射的光束的发射光束分支部分（61），从信息记录介质（3）分支反射的光束的反射光束分支部分（71）在聚焦状态下彼此不同的光束，以散焦状态接收分支的反射光束的伺服信号感测光电检测器（43,45），设置在发射光束分支部分中用于衍射反射光束的第一衍射光栅已经通过反射光束分支部分的信号感测光电检测器（47），其接收由第一衍射光栅衍射的反射光束。

7. 发明授权

US06501601B1 Optical device with diffraction grating having plural grating regions 失效
$Optical device with diffraction grating having plural grating regions$
标题翻译：具有衍射光栅的光学器件具有多个光栅区域
公开(公告)号：US06501601B1
公开(公告)日：2002-12-31
申请号：US09557711
申请日：2000-04-25
申请人： Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa , Naoki Nakanishi
发明人： Shoichi Takasuka , Shinichi Ijima , Hideyuki Nakanishi , Akio Yoshikawa , Naoki Nakanishi
IPC分类号： G02B518
CPC分类号： G11B7/1353 , G02B5/1866 , G11B7/0903 , G11B7/123 , G11B7/1356 , G11B11/10543 , G11B11/10576
摘要： An optical device includes a light-emitting element for irradiating light onto an information recording medium, a diffraction grating for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member for focussing the plurality of beams onto the information recording medium, a deflection member for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or −1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.
摘要翻译：光学装置包括用于将光照射到信息记录介质上的发光元件，用于将从所述发光元件发射的光分解成多个光束的衍射光栅，用于将多个光束聚焦到信息记录上的聚焦部件介质，用于在已经从信息记录介质反射之后偏转多个光束的偏转构件; 以及用于在被偏转构件偏转之后接收多个光束的光电检测器。衍射光栅具有第一光栅区域和第二光栅区域，其具有不同的衍射效率。将第一光栅区域中的零级衍射光用作再现信息信号的主光束，并且将第二光栅区域中的+ 1级或-1级衍射光用作用于再现跟踪误差信号。因此，在不增加半导体激光元件1的发光的同时，可以增加主光束和子光束的光量，并且可以提高主光束和子光束的S / N比。

8. 发明授权

US06728034B1 Diffractive optical element that polarizes light and an optical pickup using the same 失效
$Diffractive optical element that polarizes light and an optical pickup using the same$
标题翻译：使光偏振的衍射光学元件和使用其的光学拾取器
公开(公告)号：US06728034B1
公开(公告)日：2004-04-27
申请号：US09593239
申请日：2000-06-14
申请人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Teruhiro Shiono
发明人： Hideyuki Nakanishi , Shoichi Takasuka , Shinichi Ijima , Akio Yoshikawa , Teruhiro Shiono
IPC分类号： G02B530
CPC分类号： G11B11/10543 , G02B5/1809 , G02B5/1819 , G02B5/3025 , G02B27/4238 , G02B27/4277 , G11B7/123 , G11B7/1353 , G11B7/1395
摘要： A first diffractive optical element pattern with a pattern pitch that is no greater than a wavelength of incident light is formed on a first main surface of substrate such as a glass plate. Second diffractive optical element patterns are formed at positions that are respectively incident to positive first-order diffracted light and negative first-order diffracted light produced by the first diffractive optical element pattern. Negative first-order diffracted light produced by each second diffractive optical element pattern is incident upon a boundary face of the substrate at an angle that is smaller than the critical angle, and so exits the substrate.
摘要翻译：在诸如玻璃板的基板的第一主表面上形成具有不大于入射光的波长的图案间距的第一衍射光学元件图案。第二衍射光学元件图案形成在分别入射到由第一衍射光学元件图案产生的正一级衍射光和负一级衍射光的位置处。由每个第二衍射光学元件图案产生的负一级衍射光以小于临界角的角度入射到衬底的边界面上，并且因此离开衬底。

9. 发明授权

US07035196B2 Optical head device and optical recording and reproducing apparatus having lasers aligned in a tangential direction 有权
标题翻译：具有沿切线方向排列的激光的光学头装置和光学记录和再现装置
公开(公告)号：US07035196B2
公开(公告)日：2006-04-25
申请号：US09804492
申请日：2001-03-12
申请人： Shoichi Takasuka , Yukio Saitoh , Naoki Nakanishi , Hideyuki Nakanishi
发明人： Shoichi Takasuka , Yukio Saitoh , Naoki Nakanishi , Hideyuki Nakanishi
IPC分类号： B11B7/125 , B11B7/13
CPC分类号： G11B7/127 , G11B7/0901 , G11B7/0903 , G11B7/094 , G11B7/123 , G11B7/131 , G11B7/1353
摘要： A semiconductor laser element has the following configuration: a dual-wavelength monolithic laser where semiconductor lasers with emission wavelengths of 650 nm and 780 nm are integrated on one chip is soldered on a heat sink which then is soldered on a can package. Two beam emission points of the semiconductor laser element are positioned so that beam spots, formed on an optical disk, of light beams emitted from the two semiconductor lasers are aligned substantially along a pit-row direction in the optical disk. Thus, an optical head device and an optical recording and reproducing apparatus can be obtained that can record information on or reproduce recorded information from optical information recording media with different optical characteristics and recording densities from one another and that do not cause instability in tracking servo operation.
摘要翻译：半导体激光器元件具有以下配置：将一个芯片上集成有发射波长为650nm和780nm的半导体激光器的双波长单片激光器焊接在散热器上，然后将其焊接在罐头封装上。定位半导体激光元件的两个光束发射点，使得形成在光盘上的从两个半导体激光器发射的光束的光斑基本上沿着光盘中的凹坑行方向排列。因此，可以获得能够从具有不同光学特性和记录密度的光学信息记录介质记录信息或再现记录信息的光学头装置和光学记录和再现装置，并且不会导致跟踪伺服操作的不稳定。

10. 发明授权

US06597642B1 Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same 有权
标题翻译：光电检测器单元，光拾取器，光学再现装置和配备有其的光学记录装置
公开(公告)号：US06597642B1
公开(公告)日：2003-07-22
申请号：US09709929
申请日：2000-11-10
申请人： Shinichi Ijima , Shoichi Takasuka , Hideyuki Nakanishi , Akio Yoshikawa
发明人： Shinichi Ijima , Shoichi Takasuka , Hideyuki Nakanishi , Akio Yoshikawa
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0906 , G11B7/0943 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1356 , G11B11/10543 , G11B11/10576 , G11B11/10597 , G11B2007/0006
摘要： An optical pickup that is equipped with a photodetector unit, irradiates an optical disc with a laser beam, and receives returning light reflected by the optical disc, where the optical pickup is constructed to (1) divide the laser beam into a main beam, a preceding sub-beam, and a succeeding sub-beam, (2) direct the main beam, the preceding sub-beam, and the succeeding sub-beam toward the optical disc, and (3) divide returning lights of the main beam, the preceding sub-beam, and the succeeding sub-beam respectively into first-fourth main returning lights, first-fourth preceding returning lights, and first-fourth succeeding returning lights, and the photodetector unit includes: first-fourth main photodetectors that respectively receive the first-fourth main returning lights; first-fourth preceding photodetectors that respectively receive the first-fourth preceding returning lights; and first-fourth succeeding photodetectors that respectively receive the first-fourth succeeding returning lights. A tracking error signal appropriate to the optical disc to be reproduced is selected from three tracking error signals detected according to the detection signals from the photodetectors, and a tracking servo is driven according to the selected tracking error signal.
摘要翻译：具有光检测器单元的光学拾取器，用激光束照射光盘，并接收由光盘反射的返回光，其中光学拾取器被构造为（1）将激光束分割成主光束，前面的子光束和后续的子光束，（2）将主光束，前一个子光束和后一个子光束指向光盘，以及（3）分割主光束的返回光，分别将前次侧光束和后续子光束分别插入第一至第四主回光灯，第一至第四返回灯和第四后续返回光，并且光检测器单元包括：第一至第四主光电检测器，分别接收第四回主灯; 分别接收前四个返回光的前四分之一的光电检测器; 以及分别接收第一至第四个后续返回光的第一至第四后续光电检测器。从根据来自光电检测器的检测信号检测的三个跟踪误差信号中选择适合于要再现的光盘的跟踪误差信号，并且根据所选择的跟踪误差信号来驱动跟踪伺服。

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