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1. 发明授权

US06577573B2 Optical information reproducing method in which either a first edge signal or a second edge signal is selected depending on a length of a mark on an optical information medium 有权
标题翻译：光信息再现方法，其中根据光信息介质上的标记的长度来选择第一边缘信号或第二边缘信号
公开(公告)号：US06577573B2
公开(公告)日：2003-06-10
申请号：US10145041
申请日：2002-05-15
申请人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
发明人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
IPC分类号： G11B576
CPC分类号： G11B20/10009 , G11B7/005
摘要： An optical information reproducing method for reproducing information recorded at at least one mark on an optical information medium. The method includes irradiating a laser to the optical information medium, detecting a reflected beam reflected from the optical information medium, and reproducing information recorded on the optical information medium from an output signal of a detector which detects the reflected beam. The step of reproducing information is changed in dependence upon a length of the mark of the optical information medium.
摘要翻译：一种用于再现记录在光信息介质上的至少一个标记上的信息的光信息再现方法。该方法包括：向光学信息介质照射激光，检测从光学信息介质反射的反射光束，以及从检测反射光束的检测器的输出信号再现记录在光学信息介质上的信息。再现信息的步骤根据光信息介质的标记的长度而改变。

2. 发明授权

US06430131B1 Optical information reproducing device 有权
标题翻译：光信息再生装置
公开(公告)号：US06430131B1
公开(公告)日：2002-08-06
申请号：US09763866
申请日：2001-06-25
申请人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
发明人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
IPC分类号： G11B576
CPC分类号： G11B7/005
摘要： Information recorded on an optical disk in accordance with a mark edge recording scheme is detected by a center detection circuit which includes a bisected beam detector to obtain a mark center position signal. In succession, the mark center position signal is converted to a mark edge position signal by an edge signal generating circuit. An information reproducing device is implemented which is capable of performing reproducing operation on an information medium conforming to a high-density mark edge recording scheme and which is stable against changes of recording paper, recording sensitivity and reflectivity.
摘要翻译：根据标记边缘记录方案记录在光盘上的信息由包括二等分光束检测器的中心检测电路检测，以获得标记中心位置信号。接着，由边缘信号发生电路将标记中心位置信号转换为标记边缘位置信号。实现了能够对符合高密度标记边缘记录方案的信息介质执行再现操作并且对记录纸的变化，记录灵敏度和反射率稳定的信息再现装置。

3. 发明授权

US06717898B2 Optical information reproducing method for reproducing information by generating a signal representing a center of a mark 有权
标题翻译：光信息再现方法，用于通过产生表示标记中心的信号再现信息
公开(公告)号：US06717898B2
公开(公告)日：2004-04-06
申请号：US10436257
申请日：2003-05-13
申请人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
发明人： Shigeru Nakamura , Takeshi Maeda , Koichiro Wakabayashi
IPC分类号： G11B576
CPC分类号： G11B20/10009 , G11B7/005
摘要： An optical information reproducing method for reproducing information recorded at at least one mark on an optical information medium. The method includes irradiating a laser to the optical information medium, detecting a reflected beam reflected from the optical information medium, and reproducing information recorded on the optical information medium from an output signal of a detector which detects the reflected beam. The step of reproducing information is changed in dependence upon a length of the mark of the optical information medium.
摘要翻译：一种用于再现记录在光信息介质上的至少一个标记上的信息的光信息再现方法。该方法包括：向光学信息介质照射激光，检测从光学信息介质反射的反射光束，以及从检测反射光束的检测器的输出信号再现记录在光学信息介质上的信息。再现信息的步骤根据光信息介质的标记的长度而改变。

4. 发明授权

US06671239B2 Information recording/reproducing apparatus and method and information recording medium 失效
公开(公告)号：US06671239B2
公开(公告)日：2003-12-30
申请号：US10214365
申请日：2002-08-08
申请人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
发明人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/00454 , G11B7/006
摘要： An information recording/reproducing apparatus for overwriting information by applying light from an optical head to a record area and a space of a rewritable recording medium and changing a state of the record area and for reading the information recorded in the record area. The apparatus includes a detector circuit for detecting a state of the record area and the space where information is already recorded by detecting a reflection light while recording information thereon by overwriting, a control circuit for calculating a radiation power used for recording the information and for forming the space on the record area so as to overwrite where information is already recorded in the recording medium, in accordance with the detected reflection light, a pulse generator circuit, and an optical driver circuit.

5. 发明授权

US06445659B1 Information recording/reproducing apparatus and method and information recording medium 有权
公开(公告)号：US06445659B1
公开(公告)日：2002-09-03
申请号：US09784115
申请日：2001-02-16
申请人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
发明人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B700
摘要： An information recording/reproducing apparatus includes a detector circuit for detecting a state of reflection light from the recording medium, a control circuit for calculating a radiation power used for writing the information in the recording medium, in accordance with the reflection light state, a pulse generator circuit for generating record pulse information in accordance with the radiation power, and an optical driver circuit for converting the record pulse information into optical information in accordance with the radiation power and driving the optical head to record the light information into the recording medium. Accordingly, the apparatus records information by applying light from an optical head to a record area of a recording medium and changing a state of the record area and reads the information recorded in the record area.

6. 发明授权

US4742218A Focus error detection apparatus utilizing focusing an front and rear sides of focal planes 失效
标题翻译：利用聚焦平面的前后侧的聚焦误差检测装置
公开(公告)号：US4742218A
公开(公告)日：1988-05-03
申请号：US828354
申请日：1986-02-11
申请人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
发明人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
IPC分类号： G11B7/09 , G11B11/105 , G01J1/20 , G11B5/09
CPC分类号： G11B7/0912 , G11B11/10541 , G11B11/10576
摘要： A focus error detection apparatus and an optical disk apparatus comprising a focusing lens for focusing reflected light coming from a light reflecting surface which is to be adjusted at the focal point of a projected light beam; a beam splitter means for dividing the output light of said focusing lens into a first and a second focused light beam; a first and a second photo-detector disposed respectively on the optical paths of said first and said second focused light beam, one of which is located behind the convergence point of said first focused light beam and the other of which is located before the convergence point of said second focused light beam, each of them generating outputs proportional to the amount of light within a predetermined region of the received light image, when it varies so that it is enlarged; and a circuit generating a focus error signal by using the difference between the outputs of said two photo-detectors.
摘要翻译：一种聚焦误差检测装置和光盘装置，包括：聚焦透镜，用于聚焦来自被投影光束的焦点处被调节的光反射表面的反射光; 分束器装置，用于将所述聚焦透镜的输出光分成第一和第二聚焦光束; 分别设置在所述第一和第二聚焦光束的光路上的第一和第二光电检测器，其中一个位于所述第一聚焦光束的会聚点之后，另一个位于会聚点之前所述第二聚焦光束中的每一个产生与所接收的光图像的预定区域内的光量成比例的输出，当其变化使得其被放大时; 以及通过使用所述两个光电检测器的输出之间的差产生聚焦误差信号的电路。

7. 发明授权

US4450547A Focal position detecting optical apparatus 失效
标题翻译：焦点位置检测光学装置
公开(公告)号：US4450547A
公开(公告)日：1984-05-22
申请号：US313218
申请日：1981-10-20
申请人： Shigeru Nakamura , Takeshi Maeda , Toshimitsu Kaku , Yoshito Tsunoda , Wasao Takasugi , Tokuya Kaneda
发明人： Shigeru Nakamura , Takeshi Maeda , Toshimitsu Kaku , Yoshito Tsunoda , Wasao Takasugi , Tokuya Kaneda
IPC分类号： G02B7/28 , G02B27/40 , G11B7/09 , G11B7/135 , G11B7/1381 , G11B7/22 , G11B7/00
CPC分类号： G11B7/1381 , G02B27/40 , G11B7/0908 , G11B7/0916 , G11B7/22
摘要： A focal position detecting optical apparatus wherein a light beam focused by a first optical system is irradiated on an object to be illuminated, focal point images are formed at two foci spaced apart from each other by a cylindrical lens disposed in a path of light beam reflected from the object, and a shielding element having a tip edge making an angle of approximately 45.degree. with an operating axis of the cylindrical lens is inserted at a site between the two foci and at which the light beam has a circular cross section to extract a portion of the light beam travelling between the two foci. The extracted portion is detected by two photodetectors disposed symmetrically with an axis lying in substantially the same direction as the tip edge, and the difference between outputs of the two photodetectors is produced for detection of an actual focal position of the first optical system.
摘要翻译：一种焦点位置检测光学装置，其中由第一光学系统聚焦的光束照射在待照射的物体上，焦点图像通过设置在反射光束的路径中的柱面透镜彼此间隔开地形成在两个焦点处并且具有与柱面透镜的操作轴线成约45度的尖端边缘的屏蔽元件插入在两个焦点之间的位置处，并且光束具有圆形横截面以提取光束在两个焦点之间行进的部分。提取部分由两个光电检测器检测，两个光电检测器以与尖端边缘基本相同的轴线对称布置，并且产生两个光电检测器的输出之间的差异，用于检测第一光学系统的实际焦点位置。

8. 发明授权

US06272100B1 Information recording/reproducing apparatus and method and information recording medium 失效
公开(公告)号：US06272100B1
公开(公告)日：2001-08-07
申请号：US09059977
申请日：1998-04-14
申请人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
发明人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/00454 , G11B7/006
摘要： An information recording/reproducing apparatus includes a detector circuit for detecting a state of reflection light from the recording medium, a control circuit for calculating a radiation power used for writing the information in the recording medium, in accordance with the reflection light state, a pulse generator circuit for generating record pulse information in accordance with the radiation power, and an optical driver circuit for converting the record pulse information into optical information in accordance with the radiation power and driving the optical head to record the light information into the recording medium. Accordingly, the apparatus records information by applying light from an optical head to a record area of a recording medium and changing a state of the record area and reads the information recorded in the record area.

9. 发明授权

US4985616A Optical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus therefor 失效
标题翻译：具有用于访问的光学凹槽和用于跟踪的摆动标记的光学卡及其记录再现装置
公开(公告)号：US4985616A
公开(公告)日：1991-01-15
申请号：US153003
申请日：1988-02-08
申请人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
发明人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G11B7/24 , G11B7/00 , G11B7/0033 , G11B7/004 , G11B7/007 , G11B7/09
CPC分类号： G11B7/0033 , G11B7/00745 , G11B7/0938
摘要： An optical card of the present invention has a card-shaped recording layer whose optical characteristic is varied by a laser beam applied thereon, and a resin layer for protecting this recording layer. The recording layer has optical grooves provided at a substantially equal interval in the opposite end portions of the recording layer respectively and varying the light intensity of the laser beam when the beam traverses the grooves, and first and second optical markers provided at a prescribed interval in the direction of extension of each of the optical grooves and varying the light intensity of the laser beam which passes them. The optical grooves are made longer every prescribed number thereof than others, and the longer optical grooves are used for zone access, while the shorter optical grooves are used for track access in a zone. The first and second optical markers are provided at positions deviated alternately at equal distance from the center of a track, and operate as so-called wobble pits to detect a track error. These markers are used also as timing marks for generating a clock signal.
摘要翻译：本发明的光卡具有通过施加激光的光学特性而变化的卡状记录层和用于保护该记录层的树脂层。记录层具有分别在记录层的相对端部设置大致相等的间隔的光学槽，并且当光束横过槽时改变激光束的光强度，以及以规定间隔设置的第一和第二光学标记每个光学凹槽的延伸方向和改变通过它们的激光束的光强度。光槽比其他规定的数量更长，并且较长的光槽用于区域访问，而较短的光槽用于区域中的轨道通道。第一和第二光学标记设置在与轨道的中心相等的距离处交替地偏离的位置，并且作为所谓的摆动坑进行操作以检测轨道误差。这些标记也用作产生时钟信号的定时标记。

10. 发明授权

US4901325A Semiconductor laser device 失效
标题翻译：半导体激光器件
公开(公告)号：US4901325A
公开(公告)日：1990-02-13
申请号：US173658
申请日：1988-03-25
申请人： Takeshi Kato , Kenichi Mizuishi , Katuaki Chiba , Takeshi Nakao , Masahiro Ojima , Shigeru Nakamura , Takeshi Maeda
发明人： Takeshi Kato , Kenichi Mizuishi , Katuaki Chiba , Takeshi Nakao , Masahiro Ojima , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B7/125 , H01S5/022 , H01S5/024 , H01S5/40
CPC分类号： H01S5/02212 , G11B7/127 , H01S5/024 , H01S5/4025 , H01S5/02288
摘要： A semiconductor laser device utilizing at least a pair of semiconductor laser chips; and a fixing device for fixing the semiconductor laser chips so that electrode surfaces are approximately parallel and opposite to each other and the interval between light emitting spots of the semiconductor laser chips is small.
摘要翻译：一种利用至少一对半导体激光芯片的半导体激光器件; 以及用于固定半导体激光器芯片使得电极表面彼此大致平行且相反并且半导体激光器芯片的发光点之间的间隔小的定影装置。

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