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公开(公告)号：US5107477A
公开(公告)日：1992-04-21
申请号：US757717
申请日：1991-09-11
CPC分类号： G11B7/1398 , G11B7/09 , G11B7/1353 , G11B7/1359
摘要： An optical pick-up device for use in an optical disc information recording/reproducing apparatus is provided. In the present optical pick-up device, the functions of two or more separate optical elements provided in the prior art structure are combined or integrated in a single element to reduce the total number of separate optical elements provided in the device. In particular, use is made of a diffraction grating rather than lenses and/or lenses are formed as holo lenses. A diffraction grating and a holo lens may be formed substantially in the shape of flat plates, so that many optical components can be put together to define an integrated subassembly, which reduces the total number of discrete elements, facilitates manufacturing and eliminates the necessity of adjustments among optical elements once set.
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公开(公告)号：US5101389A
公开(公告)日：1992-03-31
申请号：US561782
申请日：1990-08-02
IPC分类号： G11B7/135 , G11B11/105
CPC分类号： G11B7/1359 , G11B11/10543 , G11B11/10576 , G11B7/1353 , G11B7/1362
摘要： An optical information recording/reproducing apparatus comprises a semi-reflecting means which receives a emitted laser light emitted from a light source, which reflect partially the received laser light toward an optical information recording medium in order to record an information, and which transmits a reflected laser light reflected by the optical information recording medium, a separating means which has the semi-reflecting means on one surface thereof, which diffracts a part of the transmitted laser light, transmits the other part of the transmitted laser light, and then subsequently diffracts said diffracted light again to produce twice diffracted light and transmits said transmitted light again to produce twice transmitted light, and a detecting means which detects the diffracted laser light and the transmitted laser light to thereby generate an information reproduction signal, a track error signal and a focus error signal.
摘要翻译： 一种光学信息记录/再现装置，包括半反射装置，其接收从光源发射的发射的激光，其部分地将接收到的激光反射向光学信息记录介质以记录信息，并且将反射 由光学信息记录介质反射的激光，在其一个表面上具有衍射一部分透射的激光的半反射装置的透射激光的另一部分的分离装置，然后衍射所述 再次产生衍射光以产生两次衍射光并再次透射所述透射光以产生两次透射光;以及检测装置，其检测衍射激光和透射的激光，从而产生信息再现信号，轨道误差信号和焦点 误差信号。
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3.发明授权Wavelength converting element and system for recording and reproducing optical information 失效用于记录和再现光学信息的波长转换元件和系统
公开(公告)号：US5325348A
公开(公告)日：1994-06-28
申请号：US878421
申请日：1992-05-04
申请人： Hideo Maeda , Eiji Noda , Shigeru Ohuchida
发明人： Hideo Maeda , Eiji Noda , Shigeru Ohuchida
摘要： In a wavelength converting element, an oscillation line at a predetermined wavelength is excited on the basis of excited light having a predetermined wavelength. Frequencies of the excited light and light on the oscillation line are mixed with each other in a nonlinear optical medium to generate light having a sum frequency. The wavelength converting element has resonators for the oscillation line and the excited light. A system for recording and reproducing optical information has a first light source capable of being directly modulated, and a second light source for emitting light having a wavelength shorter than that of a light beam emitted from the first light source. The first beam from the first light source is superposed on the short wavelength light from the second light source to record and reproduce the optical information. This system uses an overwrite recording system in which a writing operation of data is performed by emitting and superposing a modulated light beam from the first light source on the short wavelength light, and data indicative of value "0" are equivalently written to a memory medium by erasing data therefrom in this writing operation.
摘要翻译： 在波长转换元件中，基于具有预定波长的激发光来激发预定波长的振荡线。 振荡线上的激发光和光的频率在非线性光学介质中彼此混合，以产生具有和频的光。 波长转换元件具有用于振荡线和激发光的谐振器。 用于记录和再现光学信息的系统具有能够被直接调制的第一光源，以及用于发射波长短于从第一光源发射的光束的波长的光的第二光源。 来自第一光源的第一光束被叠加在来自第二光源的短波长光上以记录和再现光学信息。 该系统使用覆盖记录系统，其中通过在短波长光上发射和叠加来自第一光源的调制光束并且将表示值“0”的数据等效地写入存储介质来执行数据的写入操作 通过在该写入操作中从其中擦除数据。
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4.发明授权Optical pick-up device and method using a high-density double diffraction grating 失效光拾取装置和使用高密度双衍射光栅的方法
公开(公告)号：US5956302A
公开(公告)日：1999-09-21
申请号：US882828
申请日：1997-06-26
申请人： Hideo Maeda , Shigeru Ohuchida
发明人： Hideo Maeda , Shigeru Ohuchida
IPC分类号： G11B7/004 , G11B7/12 , G11B7/135 , G11B11/105 , G11B7/095
CPC分类号： G11B7/1353 , G11B11/10543 , G11B7/123 , G11B7/1356 , G11B7/1359 , G11B11/10502 , G11B7/004
摘要： An optical pick-up having a high-density double diffraction grating constructed with two high-density diffraction gratings superposed on each other wherein polarized light rays are separated so that P-polarized light rays pass through the double diffraction grating and S-polarized light rays are diffracted. The optical pick-up is disposed in the optical path between a light source and a recording medium.
摘要翻译： 一种具有高密度双衍射光栅的光学拾取器，其由两个彼此重叠的高密度衍射光栅构成，其中偏振光被分离，使得P偏振光通过双衍射光栅和S偏振光线 被衍射。 光学拾取器设置在光源和记录介质之间的光路中。
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公开(公告)号：US5278817A
公开(公告)日：1994-01-11
申请号：US833012
申请日：1992-02-10
IPC分类号： G11B7/135 , G11B11/105 , G11B7/00
CPC分类号： G11B7/1353 , G11B11/105 , G11B11/10532 , G11B11/10543 , G11B11/10576
摘要： An optomagnetic information recording and reproducing apparatus includes an optomagnetic optical pick-up for recording or reproducing information on or from an optomagnetic information recording disc. An optomagnetic optical pick-up includes a first diffraction grating for receiving light reflected from the disc and separating the light into a first transmitting light which transmits through the first diffraction grating beam and a first diffracted light beam which is diffracted by the first diffraction grating. A second diffraction grating is disposed to receive the first transmitging and diffracted light beams and discharges a second transmitting light beam and a second diffracted light beam. A tracking error detector is provided to receive the second transmitting light beam and a focusing error detector is disposed to receive the second diffracted light beam. An optomagnetic signal is obtained as a difference between outputs from the tracking and focusing error detectors.
摘要翻译： 光磁信息记录和再现装置包括用于在光磁信息记录盘上记录或再现信息的光磁拾取器。 光磁光学拾取器包括：第一衍射光栅，用于接收从盘反射的光，并将光分离成透过第一衍射光栅束的第一透射光;以及由第一衍射光栅衍射的第一衍射光束。 第二衍射光栅被设置为接收第一透射光和衍射光束并且放出第二透射光束和第二衍射光束。 提供跟踪误差检测器来接收第二透射光束，并且设置聚焦误差检测器以接收第二衍射光束。 获得作为跟踪和聚焦误差检测器的输出之间的差的光磁信号。
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公开(公告)号：US4935911A
公开(公告)日：1990-06-19
申请号：US196613
申请日：1988-05-20
IPC分类号： G11B11/105
CPC分类号： G11B11/10543
摘要： An optical head device for recording and reproducing information includes beam splitting and converging mechanisms which has a first portion and a second portion secured to the first portion and is disposed on an optical path of light reflected from a photo-magnetic disk.The first portion is adapted to split the reflected light received by the beam splitting and converging means into two beams which propagate in at least two directions different from each other and adapted to proportion the amount of reflected light in each of the two beams by means of the magnitude of the p-polarized component contained in the reflected light.The second portion is adapted to converge separately the two split beams.The converged two beams are used for reproducing binary data in the photo-magnetic disk.
摘要翻译： 用于记录和再现信息的光头装置包括分束和会聚机构，其具有固定到第一部分的第一部分和第二部分，并且设置在从光磁盘反射的光的光路上。 第一部分适于将由分束和会聚装置接收的反射光分成两束，其在彼此不同的至少两个方向上传播，并且适于使两个光束中的每一个中的反射光的量成比例，借助于 包含在反射光中的p偏振分量的大小。 第二部分适于分开地会聚两个分束。 会聚的两束用于再现光磁盘中的二进制数据。
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公开(公告)号：US5115423A
公开(公告)日：1992-05-19
申请号：US294466
申请日：1989-01-06
IPC分类号： G11B7/135 , G11B11/105
CPC分类号： G11B7/1353 , G11B11/105 , G11B11/10532 , G11B11/10543 , G11B11/10576
摘要： An optomagnetic information recording and reproducing apparatus includes an optomagnetic optical pick-up for recording or reproducing information on or from an optomagnetic information recording disc. An optomagnetic optical pick-up includes a first diffraction grating for receiving light reflected from the disc and separating the light into a first transmitting light which transmits through the first diffraction grating beam and a first diffracted light beam which is diffracted by the first diffraction grating. A second diffraction grating is disposed to receive the first transmitting and diffracted light beams and discharges a second transmitting light beam and a second diffracted light beam. A tracking error detector is provided to receive the second transmitting light beam and a focusing error detector is disposed to receive the second diffracted light beam. An optomagnetic signal is obtained as a difference between outputs from the tracking and focusing error detectors.
摘要翻译： 光磁信息记录和再现装置包括用于在光磁信息记录盘上记录或再现信息的光磁拾取器。 光磁光学拾取器包括：第一衍射光栅，用于接收从盘反射的光，并将光分离成透过第一衍射光栅束的第一透射光;以及由第一衍射光栅衍射的第一衍射光束。 第二衍射光栅被设置为接收第一透射和衍射光束并且放出第二透射光束和第二衍射光束。 提供跟踪误差检测器来接收第二透射光束，并且设置聚焦误差检测器以接收第二衍射光束。 获得作为跟踪和聚焦误差检测器的输出之间的差的光磁信号。
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公开(公告)号：US5097462A
公开(公告)日：1992-03-17
申请号：US757644
申请日：1991-09-11
CPC分类号： G11B7/1398 , G11B7/09 , G11B7/1353 , G11B7/1359
摘要： An optical pick-up device for use in an optical disc information recording/reproducing apparatus is provided. In the present optical pick-up device, the functions of two or more separate optical elements provided in the prior art structure are combined or integrated in a single element to reduce the total number of separate optical elements provided in the device. In particular, use is made of a diffraction grating rather than lenses and/or lenses are formed as holo lenses. A diffraction grating and a holo lens may be formed substantially in the shape of flat plates, so that many optical components can be put together to define an integrated subassembly, which reduces the total number of discrete elements, facilitates manufacturing and eliminates the necessity of adjustments among optical elements once set.
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公开(公告)号：US5060212A
公开(公告)日：1991-10-22
申请号：US232321
申请日：1988-08-15
CPC分类号： G11B7/1398 , G11B7/09 , G11B7/1353 , G11B7/1359
摘要： An optical pick-up device for use in an optical disc information recording/reproducing apparatus is provided. In the present optical pick-up device, the functions of two or more separate optical elements provided in the prior art structure are combined or integrated in a single element to reduce the total number of separate optical elements provided in the device. In particular, use is made of a diffraction grating rather than lenses and/or lenses are formed as holo lenses. A diffraction grating and a holo lens may be formed substantially in the shape of flat plates, to define an optical components can be put together to define an integrated subassembly, which reduces the total number of discrete elements, facilitates manufacturing and eliminates the necessity of adjustments among optical elements once set.
摘要翻译： 提供一种用于光盘信息记录/再现装置的光学拾取装置。 在本光拾取装置中，将现有技术结构中提供的两个或多个分开的光学元件的功能组合或集成在单个元件中，以减少设置在设备中的单独的光学元件的总数。 特别地，使用衍射光栅而不是将透镜和/或透镜形成为全息透镜。 衍射光栅和全息透镜可以基本上形成为平板形状，以限定光学部件可以放在一起以限定一个集成的子组件，这减少了离散元件的总数，有利于制造并且消除了调整的必要性 在光学元件中设置一次。
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10.发明授权Optical pickup apparatus, optical data recording/reproducing apparatus, and optical data recording/reproducing method 有权光学拾取装置，光学数据记录/再现装置和光学数据记录/再现方法公开(公告)号：US07177258B2
公开(公告)日：2007-02-13
申请号：US10971033
申请日：2004-10-25
申请人： Shigeru Ohuchida , Hiroyoshi Funato
发明人： Shigeru Ohuchida , Hiroyoshi Funato
IPC分类号： G11B7/135
CPC分类号： G11B7/1263 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1362 , G11B7/1381 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected from the optical recording medium, an optical device having a reflecting portion and a transmitting portion configured to reflect one part of the light beam emitted from the light source and to transmit another part of the light beam to the optical recording medium and from the optical recording medium, and a photodetecting device to detect the light beam from the optical recording medium for signal light detection, and the light beam reflected by the reflecting portion of the optical device for monitor light detection of the light source.
摘要翻译： 一种光学拾取装置，用于光学数据记录/再现装置中，用于在包括光源的光学记录介质上读取/再现数据，构造成透射光束并衍射从光学记录介质反射的光束的衍射装置 ，具有反射部分和透射部分的光学器件，其被配置为反射从光源发射的光束的一部分，并将光束的另一部分传输到光学记录介质和光学记录介质，以及光电检测 用于检测来自用于信号光检测的光学记录介质的光束的装置，以及由光学装置的反射部分反射的光束，用于光源的监视光检测。
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