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21. 发明授权

US5303250A Laser light generating apparatus 失效
标题翻译：激光发生装置
公开(公告)号：US5303250A
公开(公告)日：1994-04-12
申请号：US886091
申请日：1992-05-21
申请人： Hisashi Masuda , Kiyoshi Ohsato , Atsushi Fukumoto
发明人： Hisashi Masuda , Kiyoshi Ohsato , Atsushi Fukumoto
IPC分类号： G02F1/37 , H01S3/02 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/0941 , H01S3/101 , H01S3/109 , H01S3/131 , H01S3/10
CPC分类号： H01S3/0627 , H01S3/02 , H01S3/109 , H01S3/1312 , H01S2301/02 , H01S3/0071 , H01S3/025 , H01S3/0405 , H01S3/042 , H01S3/0604 , H01S3/0615 , H01S3/09415 , H01S5/0683
摘要： A laser light generating apparatus comprises a light source for generating an exciting light beam, a condenser lens for converging the exciting light beam from the light source, a laser medium for generating a laser light of first wavelength by the radiation of the exciting light beam supplied thereto through the condenser lens, a nonlinear optical crystal element for generating a second laser light by the radiation of the first laser light generated from the laser medium, a pair of reflecting means for constituting a laser resonator together with at least the laser medium and the nonlinear optical crystal element, a deflecting element for deflecting an optical axis of the second laser light emitted from reflecting means provided at the emitting side of the pair of reflecting means, detecting means for detecting a part of a light beam output from reflecting means disposed at the output side of the pair of reflecting means, control means for controlling the light source on the basis of a detected output from the detecting means, a base on which there are disposed at least the light source, the condenser lens, the laser medium, the nonlinear optical crystal element, the deflecting element and the detecting means and a housing for housing therein at least the light source, the condenser lens, the laser medium, the nonlinear optical crystal element, the deflecting element, the detecting means and the base.
摘要翻译：激光发生装置包括用于产生激发光束的光源，用于会聚来自光源的激发光束的聚光透镜，用于通过所提供的激发光束的辐射产生第一波长的激光的激光介质通过聚光透镜，通过由激光介质产生的第一激光的辐射产生第二激光的非线性光学晶体元件，一对用于与至少激光介质一起构成激光谐振器的反射装置和非线性光学晶体元件，用于偏转由设置在该对反射装置的发射侧的反射装置发射的第二激光的光轴的偏转元件，用于检测从设置在该反射装置的反射装置输出的光束的一部分的检测装置一对反射装置的输出侧，用于基于的控制光源的控制装置来自检测装置的检测输出，至少设置有光源的基座，聚光透镜，激光介质，非线性光学晶体元件，偏转元件和检测装置，以及用于容纳至少光源，聚光透镜，激光介质，非线性光学晶体元件，偏转元件，检测装置和基座。

22. 发明授权

US4742506A Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion 失效
标题翻译：用于通过使用倾斜头部部分而具有偏斜误差减小的光学头的跟踪误差检测装置
公开(公告)号：US4742506A
公开(公告)日：1988-05-03
申请号：US753570
申请日：1985-07-10
申请人： Atsushi Fukumoto , Kiyoshi Ohsato , Yasunori Terayama
发明人： Atsushi Fukumoto , Kiyoshi Ohsato , Yasunori Terayama
IPC分类号： G11B7/08 , G11B7/095 , G11B7/125 , G11B7/13 , H01S5/022
CPC分类号： G11B7/13 , G11B7/08 , G11B7/0956 , G11B7/127 , H01S5/005 , H01S5/02252
摘要： There is disclosed a tracking error detecting apparatus for an optical head, which includes a semiconductor laser apparatus, a diffraction grating, a beam splitter, an objective lens and a photo-detector, in which a laser beam from the semiconductor laser apparatus is divided into a main beam and two side beams at both sides of the main beam by the diffraction grating, the three beams are introduced through the beam splitter and the objective lens to an optical recording medium, beams reflected on the optical recording medium are introduced through the objective lens to the beam splitter and reflected thereon, the reflected beams are made incident on the photo-detector and detected outputs of at least two beams of the three beams from the photo-detector are used to produce a tracking error signal corresponding to the tacking state of the main beam on the optical recording medium. In this case, the reflection of the side beam of the reflected beams on the optical recording medium which passes through the objective lens, the beam splitter and the diffraction grating and returns to the semiconductor laser apparatus is redirected at a laser beam emission header portion to thereby reduce the influence by the skew of the optical disc on the tracking error signal.
摘要翻译：公开了一种用于光学头的跟踪误差检测装置，其包括半导体激光装置，衍射光栅，分束器，物镜和光电检测器，其中来自半导体激光装置的激光束被分成通过衍射光栅在主光束两侧的主光束和两个侧光束，通过分束器和物镜将三个光束引入光记录介质，通过目标引入在光记录介质上反射的光束透镜到分束器并在其上反射，反射光束入射到光检测器上，来自光检测器的三束光束的至少两束光的检测输出用于产生对应于定位状态的跟踪误差信号主光束在光记录介质上。在这种情况下，通过物镜，分束器和衍射光栅并返回到半导体激光装置的光记录介质上的反射光束的侧光束的反射在激光束发射头部被重定向到从而减少光盘的偏斜对跟踪误差信号的影响。

23. 发明授权

US06721259B1 Optical head and recording/reproducing device 失效
标题翻译：光头和记录/再现装置
公开(公告)号：US06721259B1
公开(公告)日：2004-04-13
申请号：US09582155
申请日：2000-07-11
申请人： Kenji Yamamoto , Kiyoshi Ohsato
发明人： Kenji Yamamoto , Kiyoshi Ohsato
IPC分类号： G11B700
CPC分类号： B82Y10/00 , G11B7/0948 , G11B7/1374 , G11B7/1378 , G11B7/13927 , G11B2007/0006 , G11B2007/13727
摘要： An optical head comprising an objective lens having a large numerical aperture of 0.8 or more. The head further comprises a light source and an aberration-correcting lens group. To correct spherical aberration due to the manufacturing errors of an optical recording medium and lenses, to sufficiently correct chromatic aberration due to the use of a short-wavelength semiconductor laser and to correct aberration resulting from the use of the same optical system for light beams of different wavelengths, the objective lens 20 is composed of two more lenses and has a numerical aperture of 0.80 or more and the aberration-correcting lens group 1 is composed of a positive lens group 3 and a negative lens group 2. The space between the positive lens group 3 and negative lens group 2 of the aberration-correcting lens group 1 is changed, thereby to correct spherical aberration occurring at each optical surface of the optical system.
摘要翻译：一种光学头，包括具有0.8或更大数值孔径的物镜。头部还包括光源和像差校正透镜组。为了校正由于光学记录介质和透镜的制造误差引起的球面像差，为了充分校正由于使用短波长半导体激光器而引起的色像差，并且校正由于使用相同的光学系统而产生的像差不同的波长，物镜20由两个透镜组成，数值孔径为0.80以上，像差校正用透镜组1由正透镜组3和负透镜组2构成。正面改变像差校正透镜组1的透镜组3和负透镜组2，从而校正在光学系统的每个光学表面处发生的球面像差。

24. 发明授权

US06366543B2 Optical pickup for discriminating between and reading different types of optical discs 失效
标题翻译：用于识别和读取不同类型的光盘的光学拾取器
公开(公告)号：US06366543B2
公开(公告)日：2002-04-02
申请号：US09819794
申请日：2001-03-29
申请人： Kamon Uemura , Kiyoshi Ohsato , Akio Yamakawa , Masamichi Utsumi
发明人： Kamon Uemura , Kiyoshi Ohsato , Akio Yamakawa , Masamichi Utsumi
IPC分类号： G11B7095
CPC分类号： G11B19/128 , G11B7/0901 , G11B7/1372 , G11B7/1381 , G11B7/139 , G11B19/12 , G11B2007/0006 , G11B2007/0013
摘要： An optical pickup including a light source for radiating a light beam, a diffraction element for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens for converging the light beams separated by the diffraction element on a signal recording surface of the optical recording medium, a light receiving unit having a four-segment first light receiving portion for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions arranged on both sides of the first light receiving portion for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit for generating a first tracking signal based on respective outputs of the first light receiving portion and for generating a second tracking signal based on outputs of the second and third light receiving portions.
摘要翻译：一种包括用于照射光束的光源的光学拾取器，用于将从光源辐射的光束分成至少三个光束，即主光束和两个侧光束的衍射元件，用于会聚分离的光束的物镜通过光记录介质的信号记录表面上的衍射元件，具有用于接收由光记录介质的记录表面反射的主光束的四段第一光接收部分和第二和第三光接收部分的光接收单元布置在第一光接收部分的两侧，用于接收由光记录介质的记录表面反射的侧光束;以及计算单元，用于基于第一光接收部分的各个输出产生第一跟踪信号，基于第二和第三光接收部分的输出的第二跟踪信号。

25. 发明授权

US06353592B1 Optical recording medium and optical disk device 有权
标题翻译：光记录介质和光盘设备
公开(公告)号：US06353592B1
公开(公告)日：2002-03-05
申请号：US09242911
申请日：1999-06-09
申请人： Toshiyuki Kashiwagi , Tetsuhiro Sakamoto , Kiyoshi Ohsato
发明人： Toshiyuki Kashiwagi , Tetsuhiro Sakamoto , Kiyoshi Ohsato
IPC分类号： G11B724
CPC分类号： G11B7/252 , G11B7/0956 , G11B7/24053 , G11B7/24056 , G11B7/24067 , G11B7/2433 , G11B7/2533 , G11B7/2534 , G11B7/2542 , G11B7/2548 , G11B7/2585 , G11B7/26 , G11B2007/24304
摘要： The present invention provides an optical recording medium including a recording layer and a light-transmitting layer successively formed on one side of a substrate, so that a light is applied from the side of this light-transmitting layer for performing an information recording and/or reproduction. On the opposite side of the substrate not having the light-transmitting layer, a water-proof film consisting of at least one layer is formed. This suppresses the skew, enabling to improve the information recording and/or reproduction characteristics for a higher recording density. Furthermore, if the light-transmitting layer has a thickness t=3 to 177 micrometers in an information signal section of the recording medium, and a thickness fluctuation &Dgr;t ≦±5.26 (&lgr;/NA4) micrometers (wherein NA is a numerical aperture and &lgr; is a wavelength of the recording/reproduction optical system), it is possible to realize a high NA and a high capacity.
摘要翻译：本发明提供了一种光记录介质，其包括依次形成在基板的一侧的记录层和透光层，使得从该透光层的侧面施加光以进行信息记录和/或再生产。在不具有透光层的基板的相反侧，形成由至少一层构成的防水膜。这抑制了偏斜，使得能够改善用于更高记录密度的信息记录和/或再现特性。此外，如果透光层在记录介质的信息信号部分中的厚度t = 3至177微米，并且厚度波动ΔTTAt<=±5.26（lambd / NA4）微米（其中NA是数值孔径，羔羊是记录/再现光学系统的波长），可以实现高NA和高容量。

26. 发明授权

US4612437A Focussing error detecting apparatus for use in an optical disc reproducing device, an auto-focus camera or image-pickup device 失效
标题翻译：用于光盘再现装置，自动对焦照相机或图像拾取装置的聚焦误差检测装置
公开(公告)号：US4612437A
公开(公告)日：1986-09-16
申请号：US577838
申请日：1984-02-07
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G03B13/36 , G02B7/28 , G02B7/32 , G11B7/09 , G11B7/12
CPC分类号： G11B7/0912 , G02B7/32 , G11B7/0916
摘要： A focussing error detecting apparatus comprises a compound lens and a photodetector, in which the compound lens has first and second lens regions having different back focal lengths separated by a boundary plane which includes the optical axis of light incident on the compound lens. The photodetector has its photodetecting face positioned on the optical axis of the light between the focal points of the two lens regions, and includes first and second photodetecting elements for receiving light passed through the first lens region at its outer and inner sections with respect to the boundary plane, respectively, and third and fourth photodetecting elements for receiving light passed through the second lens region at its outer and inner sections respectively. A focussing error signal is produced from the difference between the sum of signals from the first and fourth photodetecting elements and the sum of signals from the second and third photodetecting elements.
摘要翻译：一种聚焦误差检测装置，包括复合透镜和光电检测器，其中复合透镜具有由包括入射在复合透镜上的光的光轴的边界面分隔的不同后焦距的第一和第二透镜区域。光检测器具有位于两透镜区域的焦点之间的光的光轴上的受光面，并且包括第一和第二光电检测元件，用于接收在其外部和内部相对于第一透镜区域通过第一透镜区域的光分别用于接收在其外部和内部部分穿过第二透镜区域的光的第三和第四光电检测元件。根据来自第一和第四光电检测元件的信号之和与来自第二和第三光电检测元件的信号之和的差产生聚焦误差信号。

27. 发明授权

US4593386A Optical disc player with improved tracking control 失效
标题翻译：光盘播放器具有改进的跟踪控制
公开(公告)号：US4593386A
公开(公告)日：1986-06-03
申请号：US511912
申请日：1983-07-08
申请人： Shinichiro Kuwabara , Kiyoshi Ohsato , Mikio Sugiki
发明人： Shinichiro Kuwabara , Kiyoshi Ohsato , Mikio Sugiki
IPC分类号： G11B7/09 , G11B7/095 , G11B7/13
CPC分类号： G11B7/0941 , G11B7/0956
摘要： In an optical disc player in which a reading light beam is caused to impinge on an optical disc having a record track formed with an alignment of geometric variations such as a plurality of pits provided in response to information to be modulated in intensity by the record track and a photodetector is provided for detecting the reading light beam coming from the optical disc to generate an output varying in response to the variations in intensity of the detected reading light beam; there are provided a first circuit for producing a reproduced information signal having level variations representing the geometric variations and a tracking error signal which may have level variations depending on the size of each segment of the geometric variations on the strength of the output of the photodetector, a second circuit for detecting the duration of a portion corresponding to each segment of the geometric variations of the reproduced information signal or output of the photodetector and extracting selectively the level of the tracking error signal whenever the detected duration is measured within a predetermined time range so as to produce a modified tracking error signal having the extracted level, and a control circuit for performing tracking control in relation to the reading light beam in response to the modified tracking error signal.
摘要翻译：在其中使读取光束撞击在具有记录轨道的光盘上的光盘中，所述光盘具有形成为几何变化的对准的记录轨道，所述记录轨迹形成为响应由记录轨道强度调制的信息而提供的多个凹坑并且提供光电检测器，用于检测来自光盘的读取光束，以产生响应于检测到的读取光束的强度变化而变化的输出; 提供了一种用于产生具有表示几何变化的电平变化的再现信息信号的第一电路和可能具有取决于光电检测器的输出强度的几何变化的每个段的尺寸的电平变化的跟踪误差信号，第二电路，用于检测对应于再现信息信号或输出的光电检测器的几何变化的每个段的部分的持续时间，并且每当在预定时间范围内测量检测到的持续时间时，选择性地提取跟踪误差信号的电平以产生具有所提取的电平的修改的跟踪误差信号，以及用于响应于修改的跟踪误差信号执行与读取光束相关的跟踪控制的控制电路。

28. 发明授权

US5559766A Rotary drum tape recording apparatus with controlling optical recording tracks using stored results of scanning of reference tracks 失效
标题翻译：旋转鼓带记录装置，具有使用存储的参考轨道扫描结果控制光记录轨道
公开(公告)号：US5559766A
公开(公告)日：1996-09-24
申请号：US500028
申请日：1995-07-10
申请人： Takashi Nakao , Kiyoshi Ohsato , Yoshiteru Kamatani , Tatsuya Narahara , Tadashi Ozue
发明人： Takashi Nakao , Kiyoshi Ohsato , Yoshiteru Kamatani , Tatsuya Narahara , Tadashi Ozue
IPC分类号： G11B7/09 , G11B7/003 , G11B7/0033
CPC分类号： G11B7/0031 , G11B7/0901 , G11B7/0033
摘要： An optical recording method and an optical recording apparatus enable recording information on recording tracks substantially corresponding to ideal reference tracks, on an optical recording medium without preformatted tracks. The optical recording medium is scanned by a rotating optical scanning system using a scanning light beam emitted by an external light source to record information on the optical recording medium. Prior to recording the information on the optical recording medium, information recorded on a reference track recording medium provided with ideal reference tracks is reproduced in a tracking control mode to acquire tracking control data and the tracking control data is stored in a waveform memory. In recording information on the optical recording medium, the rotating optical scanning system is controlled on the basis of the previously stored tracking control data so that the scanning spot traces recording tracks corresponding to the ideal reference tracks.
摘要翻译：光学记录方法和光学记录装置使得能够在没有预格式化轨道的光学记录介质上将基本上对应于理想基准轨道的记录轨道上的信息进行记录。光记录介质通过使用由外部光源发射的扫描光束的旋转光学扫描系统进行扫描，以在光学记录介质上记录信息。在光记录介质上记录信息之前，以跟踪控制模式再现记录在具有理想基准轨道的基准轨道记录介质上的信息，以获取跟踪控制数据，并且将跟踪控制数据存储在波形存储器中。在光记录介质上记录信息时，基于先前存储的跟踪控制数据来控制旋转光扫描系统，使得扫描点跟踪对应于理想参考轨道的记录道。

29. 发明授权

US5063555A Rotary optical head 失效
标题翻译：旋转光头
公开(公告)号：US5063555A
公开(公告)日：1991-11-05
申请号：US618116
申请日：1990-11-26
申请人： Hiroshi Miyoshi , Yoshiteru Kamatani , Tadashi Ozue , Tatsuya Narahara , Kiyoshi Ohsato
发明人： Hiroshi Miyoshi , Yoshiteru Kamatani , Tadashi Ozue , Tatsuya Narahara , Kiyoshi Ohsato
IPC分类号： G11B7/003 , G11B7/085 , G11B7/09 , G11B7/135 , G11B11/105
CPC分类号： G11B7/1359 , G11B11/10532 , G11B11/10576 , G11B7/0031 , G11B7/08564
摘要： A rotary optical head apparatus comprises a first rotary member carrying an objective lens and a second rotary member carrying an image rotator. The two rotary members are supported for rotation by means of a single common support shaft so that the axes of rotation of the two rotary members coincide with each other with a high degree of accuracy. Consequently, the linearity of a scanning line of a beam spot which is scanned on an optical magnetic tape is ensured with a high degree of accuracy.

30. 发明授权

US5023855A Optical disc access control system that counts tracks using tracking control signal 失效
标题翻译：使用跟踪控制信号对磁道进行计数的光盘访问控制系统
公开(公告)号：US5023855A
公开(公告)日：1991-06-11
申请号：US170352
申请日：1988-03-18
申请人： Seiji Kobayashi , Kiyoshi Ohsato
发明人： Seiji Kobayashi , Kiyoshi Ohsato
IPC分类号： G11B7/085
CPC分类号： G11B7/08541
摘要： An apparatus for counting a number of record tracks which an optical head traverses on a basis of a periodical track transverse information INF.sub.TR representing the traverse of the head across the record tracks. The periodical track transverse information INF.sub.TR is derived by sampling information on the record tracks performed discretely on record tracks TR. In the tracks counting apparatus, a tracking signal generating circuit is installed for generating tracking signals V.sub.OP and V.sub.OQ which vary their frequencies and phases so as to follow those of the track transverse information INF.sub.TR. The number of record tracks which the optical head has traversed are counted on the basis of the tracking signals V.sub.OP and V.sub.OQ. The tracking signals V.sub.OP and V.sub.OQ have continuous waveforms so that the number of tracks can accurately be counted even if the only discrete information is derived as the track transverse information INF.sub.TR.

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