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1.发明授权Optical head with built-in semiconductor laser, objective lens and 1/4 wavelength plate 失效光头采用内置半导体激光器，物镜和+ E，fra 1/4 + EE波长板
公开(公告)号：US5555232A
公开(公告)日：1996-09-10
申请号：US336782
申请日：1994-11-09
CPC分类号： G11B7/126 , G11B7/123 , G11B7/13 , G11B7/1378
摘要： An optical head has a semiconductor laser for emitting light, a collimator lens for converting the light from the laser into a parallel light beam, a semiconductor substrate for reflecting the light beam, and an objective lens for focussing the light beam reflected from the substrate on the optical disk. A 1/4 wavelength plate is situated between the substrate and the objective lens. A beam splitter which transmits the light from the laser and reflects the light returning from the disk is provided between the collimator lens and the substrate. Following the beam splitter, a collective lens, a cylindrical lens and an optical detector are arranged in this order on an optical path for the returning light. A light receiving element for outputting a signal corresponding to the intensity of the light received is formed on the semiconductor substrate, and a polarizing film is formed on the surface thereof.
摘要翻译： 光头具有用于发射光的半导体激光器，用于将来自激光的光转换为平行光束的准直透镜，用于反射光束的半导体基板和用于将从基板反射的光束聚焦的物镜 光盘。 A + E，fra 1/4 + EE波片位于基片和物镜之间。 在准直透镜和基板之间设置有从激光器透射光并反射从光盘返回的光的分束器。 在分束器之后，在用于返回光的光路上依次布置集体透镜，柱面透镜和光学检测器。 在半导体衬底上形成用于输出与所接收的光的强度相对应的信号的光接收元件，并且在其表面上形成偏振膜。
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2.发明授权Optical pick-up apparatus having hologram and beam splitter with birefringent member and polarizing film 失效具有全息图的光学拾取装置和具有双折射元件和偏光膜的分束器
公开(公告)号：US5621714A
公开(公告)日：1997-04-15
申请号：US400757
申请日：1995-03-08
CPC分类号： G11B7/1356 , G11B11/10543 , G11B7/124 , G11B7/126 , G11B7/127 , G11B7/131 , G11B7/1353 , G11B11/10576 , G11B7/09
摘要： An optical pick-up apparatus for reproducing information recorded on a magneto-optical record medium including a semiconductor laser emitting a linearly polarized laser beam, and a polarizing film provided between a glass prism and a uniaxial birefringent crystal prism. The laser beam emitted by the semiconductor laser is made incident upon the polarizing film via the glass prism and is reflected thereby. The apparatus further includes an objective lens projecting the laser beam reflected by the polarizing film onto the magneto-optical record medium as a fine spot and converging a return laser beam reflected by the record medium toward the polarizing film. The return beam transmitted through the polarizing film is refracted by the uniaxial birefringent crystal prism and is divided into ordinary light and extraordinary light, which are received by a first photodetector to produce a reproduced information signal. The return beam reflected by the polarizing film is made incident upon a hologram and is diffracted thereby into .+-.1-order beams which are received by a second photodetector to produce a focusing error signal and a tracking error signal.
摘要翻译： 一种用于再现记录在包括发射线性偏振激光束的半导体激光器的磁光记录介质上的信息的光学拾取装置，以及设置在玻璃棱镜和单轴双折射晶体棱镜之间的偏振膜。 由半导体激光器发射的激光束经由玻璃棱镜入射到偏振膜上并被反射。 该装置还包括将由偏振膜反射的激光束投影到磁光记录介质上的物镜作为细微点，并将由记录介质反射的返回激光束会聚到偏振膜。 透过偏光膜的返回光束被单轴双折射晶体棱镜折射，分为普通的光和非常的光，由第一光电检测器接收以产生再现的信息信号。 由偏振膜反射的返回光束入射到全息图上，并被衍射为由第二光电检测器接收的+/- 1次光束，以产生聚焦误差信号和跟踪误差信号。
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公开(公告)号：US08125639B2
公开(公告)日：2012-02-28
申请号：US12592743
申请日：2009-12-01
IPC分类号： G01J3/28
CPC分类号： G01J3/02 , G01J3/021 , G01J3/0262 , G01J3/0291 , G01J3/12 , G01J3/16 , G02B26/0833
摘要： A spectroscope includes an emitting portion from where light is output, a dispersive element which is disposed on a side of the light emitting portion, to which the light is output, an incidence portion on which, light dispersed by the dispersive element is incident, and a temperature-compensating element which is disposed between the emitting portion and the incidence portion, and which is such that, an angle of incidence of the light dispersed on the incidence portion becomes almost constant with respect to a change in temperature in an operating temperature range. Moreover, the optical apparatus has such spectroscope in which temperature is compensated.
摘要翻译： 分光器包括从其输出光的发射部分，布置在光发射部分的一侧的色散元件，光输出到该散射元件，由分散元件分散的光入射到该入射部分;以及 布置在发射部分和入射部分之间的温度补偿元件，并且使得散射在入射部分上的光的入射角相对于工作温度范围内的温度变化几乎恒定 。 此外，光学装置具有补偿温度的分光镜。
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公开(公告)号：US5406543A
公开(公告)日：1995-04-11
申请号：US224009
申请日：1994-04-06
CPC分类号： H01L31/16 , G11B7/123 , G11B7/127 , G11B7/131 , G11B7/1353
摘要： An optical head for writing and/or reading information on and/or from an optical record medium such as a magneto-optical record medium including a semiconductor substrate, a semiconductor laser mounted on a surface of the semiconductor substrate for emitting a laser beam, an objective lens for projecting the laser beam onto the optical record medium as a fine spot, a plurality of photodetectors firmed in the surface of the semiconductor substrate, and an optical block arranged on said semiconductor substrate to form an integral unit together with said semiconductor substrate. The optical block includes a hologram for diffracting a return beam reflected by said magneto-optical record medium and a polarization beam splitting plane arranged in substantially parallel with an optical axis of a zero order beam emanating from the hologram for splitting a pupil of the hologram. The return beams diffracted by the hologram and split by the polarization beam splitting plane are separately received by the plurality of photodetectors. By processing outputs of the photodetectors, information signal, focusing error signal and tracking error signal can be derived in a reliable and stable manner, while the optical head can be simple in construction, small in size and cheap in cost.
摘要翻译： 一种用于在光学记录介质上写入和/或读取信息的光学头，例如包括半导体衬底的磁光记录介质，安装在用于发射激光束的半导体衬底的表面上的半导体激光器， 用于将激光束投射到光学记录介质上的物镜作为细微点，在半导体衬底的表面中确认的多个光电检测器和布置在所述半导体衬底上以与所述半导体衬底一起形成整体单元的光学块。 光学块包括用于衍射由所述磁光记录介质反射的返回光束的全息图和与从全息图发射的零级光束的光轴基本平行布置的偏振光束分离平面，用于分离全息图的光瞳。 由全息图衍射并由偏振光束分离平面分离的返回光束由多个光电检测器分别接收。 通过处理光电检测器的输出，可以以可靠和稳定的方式导出信息信号，聚焦误差信号和跟踪误差信号，而光头的结构简单，尺寸小，成本便宜。
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公开(公告)号：US20100208262A1
公开(公告)日：2010-08-19
申请号：US12592743
申请日：2009-12-01
IPC分类号： G01J3/02
CPC分类号： G01J3/02 , G01J3/021 , G01J3/0262 , G01J3/0291 , G01J3/12 , G01J3/16 , G02B26/0833
摘要： A spectroscope includes an emitting portion from where light is output, a dispersive element which is disposed on a side of the light emitting portion, to which the light is output, an incidence portion on which, light dispersed by the dispersive element is incident, and a temperature-compensating element which is disposed between the emitting portion and the incidence portion, and which is such that, an angle of incidence of the light dispersed on the incidence portion becomes almost constant with respect to a change in temperature in an operating temperature range. Moreover, the optical apparatus has such spectroscope in which temperature is compensated.
摘要翻译： 分光器包括从其输出光的发射部分，布置在光发射部分的一侧的色散元件，光输出到该散射元件，由分散元件分散的光入射到该入射部分;以及 布置在发射部分和入射部分之间的温度补偿元件，并且使得散射在入射部分上的光的入射角相对于工作温度范围内的温度变化几乎恒定 。 此外，光学装置具有补偿温度的分光镜。
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公开(公告)号：US07315670B2
公开(公告)日：2008-01-01
申请号：US11329890
申请日：2006-01-11
申请人： Shohei Kobayashi , Junichi Nakano , Kenzi Murakami
发明人： Shohei Kobayashi , Junichi Nakano , Kenzi Murakami
IPC分类号： G02B6/26
CPC分类号： G02B6/29395 , G02B6/2931 , G02B6/3512 , G02B6/353 , G02B6/3556 , G02B6/3566 , G02B6/357
摘要： An optical switch includes a plurality of light inputting members, a plurality of light outputting members, an optical coupling member which couples light to the light inputting members and the light outputting members, an optical path changing member which changes an optical path from the light inputting members up to the light outputting members, an optical path shielding member which can take a first position which shields collectively all optical paths from the light inputting members up to the light outputting members and a second position which allows light to pass through the optical path, a first driving circuit which drives the optical path changing member, and a second driving circuit which drives the optical path shielding member.
摘要翻译： 光开关包括多个光输入部件，多个光输出部件，将光耦合到光输入部件和光输出部件的光耦合部件，将光路从光输入 成员直到光输出构件，光路屏蔽构件，其可以采取第一位置，其将来自光输入构件的所有光路共同遮蔽到光输出构件，以及允许光通过光路的第二位置， 驱动光路改变构件的第一驱动电路和驱动光路屏蔽构件的第二驱动电路。
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公开(公告)号：US5566142A
公开(公告)日：1996-10-15
申请号：US384843
申请日：1995-02-07
摘要： The present invention is directed to an apparatus using an integrated type pickup as an optical head for writing and reading optical information and capabling of writing data at high speeds. The apparatus includes a laser diode having an active layer at its intermediate position and having one area side held over a surface of a semiconductor substrate with an insulating layer interposed between the semiconductor substrate and the laser diode relative to the active layer. The laser diode has two areas with the active layer as a boundary and a constant potential is applied from a power supply to the insulating layer side of the laser diode and a transistor (laser diode drive unit) is provided to apply a modulation signal to the other area of the laser diode so that the laser diode is driven to modulate its output. By doing so, a constant potential is maintained at the semiconductor substrate and at the insulating layer's side of the laser diode and the modulation signal is applied to the other area side of the laser diode. When a drive current of the laser diode is varied by the modulation signal, a voltage variation occurs only on the other area side of the laser diode so that a high-frequency drive current, if flowing through the insulating layer side, is small and hence the laser diode has its output to be modulated effectively.
摘要翻译： 本发明涉及使用集成型拾取器作为用于写入和读取光学信息的光学头和高速写入数据的功能的装置。 该装置包括激光二极管，该激光二极管在其中间位置处具有有源层，并且其一个区域侧保持在半导体衬底的表面上，相对于有源层，绝缘层介于半导体衬底和激光二极管之间。 激光二极管具有两个区域，其中有源层作为边界，并且从电源向激光二极管的绝缘层侧施加恒定电位，并且提供晶体管（激光二极管驱动单元）以将调制信号施加到 激光二极管的其他区域，以便驱动激光二极管来调制其输出。 通过这样做，在半导体衬底和激光二极管的绝缘层侧保持恒定的电位，并且将调制信号施加到激光二极管的另一个区域侧。 当激光二极管的驱动电流由调制信号变化时，仅在激光二极管的另一区域侧产生电压变化，使得如果流过绝缘层侧的高频驱动电流较小，因此 激光二极管的输出有效调制。
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公开(公告)号：US20060098196A1
公开(公告)日：2006-05-11
申请号：US11258449
申请日：2005-10-25
申请人： Shohei Kobayashi
发明人： Shohei Kobayashi
IPC分类号： G01J3/28
CPC分类号： G02B6/2931 , G01J9/00 , G01J9/0246 , G02B6/3512 , G02B6/3546 , G02B6/356 , G02B6/3588
摘要： A highly reliable optical switch which can output (switch) accurately to an optical fiber for output without being affected by a change in an environment and a change due to an elapsed time is provided. The optical switch includes a first spectroscope which separates spatially light from an optical fiber for input according to a wavelength and a mirror array which includes a plurality of mirrors which reflect separated light and an angle of each of the mirrors can be controlled independently by an electric signal. The optical switch further includes An optical branching device which extracts a part of an output light from the optical fiber for output, an optical fiber for monitoring which guides apart of output light extracted by the optical branching device, a second spectroscope which separates spatially light from the optical fiber for monitoring according to a wavelength, and a photodetector array which can detect lights of different wavelengths separated at the second spectroscope.
摘要翻译： 提供了一种高度可靠的光开关，其可以在不受环境变化和由于经过时间引起的变化的影响的情况下精确地输出（切换）到光纤以进行输出。 该光开关包括：第一分光镜，用于根据波长分离空间光与用于输入的光纤;以及反射镜阵列，其包括反射分离的光的多个反射镜，并且每个反射镜的角度可以通过电 信号。 光开关还包括：一光分路装置，用于提取来自光纤的输出光的一部分用于输出，用于监视的光纤，其引导光分支装置提取出的输出光;第二分光器，将空间光与 用于根据波长进行监视的光纤，以及可以检测在第二光谱仪分离的不同波长的光的光电检测器阵列。
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公开(公告)号：US06661765B2
公开(公告)日：2003-12-09
申请号：US09748940
申请日：2000-12-27
IPC分类号： G11B700
CPC分类号： G11B7/139 , G11B7/123 , G11B7/1353 , G11B7/1356 , G11B7/1365 , G11B7/1378 , G11B11/10543 , G11B2007/13727 , H01S5/005 , H01S5/02248 , H01S5/0683
摘要： A laser beam emitted from a laser source provided at a silicon substrate passes through a hologram element formed of a translucent flat plate and a grating, thereby being subjected to NA conversion executed by an NA converting lens, passing through a polarizing film of a polarization beam splitter, and converging onto a magneto-optical disk via a collimator lens and an objective. A part of back-reflection from the magneto-optical disk, which is reflected by a polarizing film of the polarization beam splitter, is reflected by a reflection surface of the splitter, then branched into two polarized light beams by a Wollaston prism, and guided to one light receiving element group. On the other hand, another part of the back-reflection, which passes through the polarization beam splitter, is branched into two beams by the hologram element and guided to the other light receiving element groups.
摘要翻译： 从设置在硅衬底处的激光源发射的激光束通过由半透明平板和光栅形成的全息元件，由NA转换透镜进行NA转换，通过偏振光束的偏振膜 分离器，并通过准直透镜和物镜会聚到磁光盘上。 由偏振光分束器的偏振膜反射的来自磁光盘的背反射的一部分被分离器的反射面反射，然后通过Wollaston棱镜分支成两个偏振光束，并被引导 到一个光接收元件组。 另一方面，穿过偏振分束器的背反射的另一部分被全息元件分支成两束，并被引导到另一光接收元件组。
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公开(公告)号：US06396785B1
公开(公告)日：2002-05-28
申请号：US09233756
申请日：1999-01-20
申请人： Shohei Kobayashi , Junichi Nakano
发明人： Shohei Kobayashi , Junichi Nakano
IPC分类号： G11B700
CPC分类号： G11B7/126
摘要： The present invention avoids a loss of information recorded on or information to be recorded onto an optical disk by accepting a state of deterioration of a semiconductor laser in a closed-type optical disk apparatus. The optical disk is rotated in a predetermined direction by a driving of a spindle motor through a motor driver based on an instruction from a control section. Information is recorded onto or reproduced from the optical disk by a semiconductor laser driven through a laser driver based on an instruction from the control section. The state of progress of deterioration of the semiconductor laser is monitored by a monitoring section, and this state is displayed by a light display section according to a deterioration state.
摘要翻译： 本发明通过接受封闭型光盘装置中的半导体激光器的劣化状态来避免记录在光盘上的信息丢失或记录在光盘上的信息。 基于来自控制部的指示，通过马达驱动器驱动主轴马达，使光盘沿预定方向旋转。 基于来自控制部的指示，通过激光驱动器驱动的半导体激光器将信息记录在光盘上或从光盘再现。 通过监视部来监视半导体激光器的劣化状态，根据劣化状态通过光显示部显示该状态。
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