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1.发明授权公开(公告)号：US06693856B1
公开(公告)日：2004-02-17
申请号：US09953194
申请日：2001-09-17
申请人： Masaaki Shidochi , Kanichi Koyama , Yoichi Tsuchiya , Mitsuhiko Maeda , Seiji Kajiyama , Seiichiro Takahashi
发明人： Masaaki Shidochi , Kanichi Koyama , Yoichi Tsuchiya , Mitsuhiko Maeda , Seiji Kajiyama , Seiichiro Takahashi
IPC分类号： G11B7085
CPC分类号： G11B11/10595 , G11B11/10515 , G11B11/10543 , G11B11/10552
摘要： A magneto-optical disk apparatus includes a magnetic head in a position opposed to an objective lens included in an optical head with a magneto-optical record medium therebetween. The magneto-optical disk apparatus includes a magnet for cancelling a first magnetic field emitted toward the magnetic head from a magnet for focus servo-control or tracking servo-control of the objective lens. The magnet emits a second magnetic field in a direction toward the magnetic head. The second magnetic field is opposite in direction to the first magnetic field, and has the same intensity as the first magnetic field. Consequently, the signal can be accurately reproduced from the magneto-optical record medium while removing a magnetic influence from the magnet included in the optical head.
摘要翻译： 磁光盘装置包括与包括在其中具有磁光记录介质的光学头中的物镜相对的位置的磁头。 磁光盘装置包括用于从用于物镜的聚焦伺服控制或跟踪伺服控制的磁体取消朝向磁头发射的第一磁场的磁体。 磁体沿朝向磁头的方向发射第二磁场。 第二磁场与第一磁场方向相反，并且具有与第一磁场相同的强度。 因此，可以从磁光记录介质精确地再现信号，同时从包括在光头中的磁体去除磁影响。
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公开(公告)号：US5856965A
公开(公告)日：1999-01-05
申请号：US646063
申请日：1996-05-07
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou
CPC分类号： G11B7/1374 , G11B20/10009 , G11B20/10027 , G11B7/005 , G11B7/0941 , G11B7/1275 , G11B7/1367 , G11B7/139 , G11B2007/0006 , G11B2020/10879
摘要： An optical disc readout apparatus having an optical system which guides a laser beam onto a signal recording surface of a loaded disc through an objective lens and guides a reflected laser beam onto a photo detector. An effective numerical aperture of the objective lens is adjusted according to the thickness between a substrate surface of the loaded disc and the signal recording surface, and the laser spot with a diameter suitable to a recording density of the loaded disc is focused on the signal recording surface. Therefore, the data recorded in a plurality of optical discs with different thickness or recording densities can be read out.
摘要翻译： 一种具有光学系统的光盘读出装置，其通过物镜将激光束引导到装载的盘的信号记录表面上，并将反射的激光束引导到光检测器上。 根据加载盘的基板表面和信号记录表面之间的厚度来调整物镜的有效数值孔径，并且具有适合于加载的盘的记录密度的直径的激光点聚焦在信号记录 表面。 因此，可以读出记录在具有不同厚度或记录密度的多个光盘中的数据。
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公开(公告)号：US07609606B2
公开(公告)日：2009-10-27
申请号：US11302343
申请日：2005-12-14
申请人： Kenji Nagatomi , Seiji Kajiyama , Yoichi Tsuchiya
发明人： Kenji Nagatomi , Seiji Kajiyama , Yoichi Tsuchiya
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/123 , G11B7/1275 , G11B7/1353 , G11B7/1365 , G11B7/1378 , G11B7/1398 , G11B2007/0006 , G11B2007/13727
摘要： Provided is an optical pickup device capable of suppressing an increase in the number of parts and complication of an optical system while a diffraction grating is used as an optical axis correcting element. Three kinds of blue, red, and infrared laser light beams are emitted from laser element provided in the same CAN package. A blue light emitting point (wavelength: 405 nm) and an infrared light emitting point (wavelength: 780 nm) are arranged in a layer forming direction of the laser elements such that an interval (d2) between the light emitting points becomes shorter than an interval (d1) between each of the light emitting points and a red light emitting point. An optical axis of the laser light beam emitted from the red light emitting point (wavelength: 650 nm) is aligned with an optical axis of the laser light beam emitted from the blue or infrared light emitting point by using the diffraction grating. The number of diffraction gratings for optical axis correction can be made to one and a single photo detector can be commonly used for laser light beams having different wavelengths.
摘要翻译： 提供了一种能够抑制在使用衍射光栅作为光轴校正元件的情况下部件数量增加和光学系统的复杂性的光学拾取装置。 从相同CAN封装中提供的激光元件发射三种蓝色，红色和红外激光束。 在激光元件的层形成方向上布置蓝色发光点（波长：405nm）和红外发光点（波长：780nm），使得发光点之间的间隔（d2）比 每个发光点和红色发光点之间的间隔（d1）。 从红色发光点（波长：650nm）发射的激光束的光轴与通过使用衍射光栅从蓝色或红外光发射点发射的激光束的光轴对准。 用于光轴校正的衍射光栅的数量可以制成一个，并且单个光电检测器可以被普遍用于具有不同波长的激光束。
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4.发明授权
公开(公告)号：US6122242A
公开(公告)日：2000-09-19
申请号：US474907
申请日：1999-12-29
CPC分类号： G11B7/24085 , G11B19/12 , G11B7/1369 , G11B7/139 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.
摘要翻译： 一种光盘再现装置，包括：半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜;偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。
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公开(公告)号：US07376166B2
公开(公告)日：2008-05-20
申请号：US11387061
申请日：2006-03-23
申请人： Masayuki Hata , Yasuyuki Bessho , Yasuhiko Nomura , Masayuki Shono , Seiji Kajiyama , Yoichi Tsuchiya
发明人： Masayuki Hata , Yasuyuki Bessho , Yasuhiko Nomura , Masayuki Shono , Seiji Kajiyama , Yoichi Tsuchiya
IPC分类号： H01S5/00
CPC分类号： H01S5/4043 , B82Y20/00 , G11B7/123 , G11B7/1275 , G11B2007/0006 , H01L2224/48091 , H01L2224/73265 , H01S5/0202 , H01S5/0207 , H01S5/02212 , H01S5/0224 , H01S5/02272 , H01S5/02276 , H01S5/0425 , H01S5/2214 , H01S5/2231 , H01S5/3432 , H01S5/34326 , H01S5/34333 , H01S5/4031 , H01S5/4087 , H01L2924/00014
摘要： A blue-violet emission point, an infrared emission point, and a red emission point in a semiconductor laser apparatus are arranged so as to be arranged in this order on a substantially straight line along a first direction. A blue-violet laser beam emitted from the blue-violet emission point and a red laser beam emitted from the red emission point are incident on an optical disk by an optical system comprising a polarizing beam splitter, a collimator lens, a beam expander, a λ/4 plate, an objective lens, a cylindrical lens, and an optical disk, is returned from the optical disk, and is introduced into an photodetector. The infrared laser beam emitted from the infrared emission point is incident on the optical disk by the optical system, is returned from the optical disk, and is introduced into the photodetector.
摘要翻译： 半导体激光装置中的蓝紫色发射点，红外发射点和红色发射点被布置成沿着第一方向以大致直线排列。 从蓝紫色发射点发射的蓝紫色激光束和从红色发射点发射的红色激光束通过包括偏振分束器，准直透镜，光束扩展器，光束扩散器 λ/ 4板，物镜，柱面透镜和光盘从光盘返回，并被引入光电检测器。 从红外发射点发射的红外激光束通过光学系统入射到光盘上，从光盘返回，并被引入光电检测器。
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公开(公告)号：US20060140078A1
公开(公告)日：2006-06-29
申请号：US11302343
申请日：2005-12-14
申请人： Kenji Nagatomi , Seiji Kajiyama , Yoichi Tsuchiya
发明人： Kenji Nagatomi , Seiji Kajiyama , Yoichi Tsuchiya
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/123 , G11B7/1275 , G11B7/1353 , G11B7/1365 , G11B7/1378 , G11B7/1398 , G11B2007/0006 , G11B2007/13727
摘要： Provided is an optical pickup device capable of suppressing an increase in the number of parts and complication of an optical system while a diffraction grating is used as an optical axis correcting element. Three kinds of blue, red, and infrared laser light beams are emitted from laser element provided in the same CAN package. A blue light emitting point (wavelength: 405 nm) and an infrared light emitting point (wavelength: 780 nm) are arranged in a layer forming direction of the laser elements such that an interval (d2) between the light emitting points becomes shorter than an interval (d1) between each of the light emitting points and a red light emitting point. An optical axis of the laser light beam emitted from the red light emitting point (wavelength: 650 nm) is aligned with an optical axis of the laser light beam emitted from the blue or infrared light emitting point by using the diffraction grating. The number of diffraction gratings for optical axis correction can be made to one and a single photo detector can be commonly used for laser light beams having different wavelengths.
摘要翻译： 提供了一种能够抑制在使用衍射光栅作为光轴校正元件的情况下部件数量增加和光学系统的复杂性的光学拾取装置。 从相同CAN封装中提供的激光元件发射三种蓝色，红色和红外激光束。 在激光元件的层形成方向上布置蓝色发光点（波长：405nm）和红外发光点（波长：780nm），使得发光点之间的间隔（d 2）变得短于 每个发光点和红色发光点之间的间隔（d 1）。 从红色发光点（波长：650nm）发射的激光束的光轴与通过使用衍射光栅从蓝色或红外光发射点发射的激光束的光轴对准。 用于光轴校正的衍射光栅的数量可以制成一个，并且单个光电检测器可以被普遍用于具有不同波长的激光束。
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7.发明授权
公开(公告)号：US6167019A
公开(公告)日：2000-12-26
申请号：US474554
申请日：1999-12-29
CPC分类号： G11B7/24085 , G11B7/1369 , G11B7/139 , G11B19/12 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.
摘要翻译： 一种光盘再现装置，包括半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜，偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。
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8.发明授权
公开(公告)号：US5917791A
公开(公告)日：1999-06-29
申请号：US689019
申请日：1996-07-30
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
CPC分类号： G11B19/12 , G11B7/12 , G11B2007/0006 , G11B7/0945
摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.
摘要翻译： 用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。 当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘 从彼此。 因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。
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9.发明授权Optical head for two different disk thicknesses with a light beam diameter control device 有权具有光束直径控制装置的两个不同光盘厚度的光头公开(公告)号：US06552990B1
公开(公告)日：2003-04-22
申请号：US09180301
申请日：1998-11-05
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/08582 , G11B7/123 , G11B7/127 , G11B7/1362 , G11B7/1367 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup device which includes a semiconductor laser selectively generating a laser beam with a wavelength of 635 nm, a laser beam with a wavelength of 780 nm, and an optical device having a central region in which a hologram is formed and a peripheral region in which a diffraction grating is formed. In particular, the optical device is arranged immediately below an objective lens, and the central region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction but increases the diameter of the teaser beam to the wavelength of 780 nm by diffraction. On the other hand, peripheral region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction, but substantially shields the laser beam with the wavelength of 780 nm by diffraction. Thus, each laser beam with the wavelength 635 nm is transmitted through objective lens and focused on a signal recording surface of a DVD. The periphery of the laser beam with the wavelength of 780 nm is significantly diffracted by peripheral region of optical device and only the central portion of the laser beam enters objective lens while increasing its diameter. Thus, the laser beam with the wavelength of 780 nm is focused on a signal recording surface of a CD-R or a CD-ROM. Therefore, the optical pickup device is capable of compatibly reproducing the DVD, CD-R and CD-ROM.
摘要翻译： 一种光拾取装置，包括选择性地产生波长为635nm的激光束的半导体激光器，波长为780nm的激光束，以及具有形成全息图的中心区域的光学元件和周边区域 形成衍射光栅。 特别地，光学装置被布置在物镜的正下方，并且中心区域允许透射具有635nm波长的激光束而没有任何衍射，但是通过衍射将前导光束的直径增加到780nm的波长。 另一方面，外围区域允许透射波长为635nm的激光束而没有衍射，但是通过衍射基本上屏蔽了波长为780nm的激光束。 因此，波长为635nm的每个激光束通过物镜透射并聚焦在DVD的信号记录表面上。 波长为780nm的激光束的周围被光学器件的周边区域显着地衍射，并且只有激光束的中心部分在增加其直径的同时进入物镜。 因此，将波长为780nm的激光束聚焦在CD-R或CD-ROM的信号记录面上。 因此，光学拾取装置能够兼容地再现DVD，CD-R和CD-ROM。
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10.发明授权公开(公告)号：US06321028B1
公开(公告)日：2001-11-20
申请号：US08661937
申请日：1996-06-11
申请人： Seiji Kajiyama , Yoichi Tsuchiya , Yasuyuki Kanou , Shuichi Ichiura , Hitotoshi Kimura , Toshio Harada , Yasuyuki Matsushita
发明人： Seiji Kajiyama , Yoichi Tsuchiya , Yasuyuki Kanou , Shuichi Ichiura , Hitotoshi Kimura , Toshio Harada , Yasuyuki Matsushita
IPC分类号： H04N585
CPC分类号： G11B7/1381 , G11B7/1369 , G11B7/139 , G11B2007/0006 , H04N5/85
摘要： An optical disk recording/reproduction apparatus includes a semiconductor laser, an objective lens provided opposite an optical disk, an optical system for supplying a laser beam from the semiconductor laser to the objective lens, an aperture for not intercepting the laser beam in reproducing from a digital video disk and intercepting an outermost portion of the laser beam in reproducing from a compact disk, and a tracking servo mechanism for moving the objective lens in a tracking direction orthogonal to the running direction of a track of the optical disk. The aperture has an oblong opening that is longer in the tracking direction than in the track running direction.
摘要翻译： 光盘记录/再现装置包括半导体激光器，与光盘相对设置的物镜，用于将来自半导体激光器的激光束提供给物镜的光学系统，用于不从所述半导体激光器再现中截取激光束的孔径 数字视频盘，并且从光盘再现时截获激光束的最外部分;以及跟踪伺服机构，用于沿着与光盘的轨道行进方向垂直的跟踪方向移动物镜。 该孔具有在跟踪方向上比轨道运行方向更长的长方形开口。
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