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31. 发明授权

EP0216495B1 Error signal detecting device 有权
标题翻译：错误信号检测装置
公开(公告)号：EP0216495B1
公开(公告)日：1992-05-20
申请号：EP86306371.5
申请日：1986-08-18
申请人： CANON KABUSHIKI KAISHA
发明人： Aoi, Shigeru
IPC分类号： G11B7/09 , G01B11/02
CPC分类号： G11B7/09 , G11B7/0941 , G11B11/10576

32. 发明公开

EP0452028A3 Optical head with improved tracking and focusing error control means 失效
标题翻译：具有改进跟踪和聚焦误差控制的光头
公开(公告)号：EP0452028A3
公开(公告)日：1992-05-06
申请号：EP91302912.0
申请日：1991-04-03
申请人： KABUSHIKI KAISHA NIPPON CONLUX , NHK SPRING CO.LTD.
发明人： Noda, Kazuo , Nakamura, Eiichi , Nishiguma, Hiroaki c/oNHK Spring Co Ltd
IPC分类号： G11B7/09 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/09 , G11B7/1381
摘要： An optical head for reading and/or writing information from and in an optical recording medium having an improved sensor structure for focusing and tracking error detections. A light beam is separated into a 0th-order diffraction light beam and ±1st-order diffraction light beams, and these light beams are impinged upon a recording track of the optical recording medium (3). The light beams reflected from the optical recording medium is separated into two different directions (12,13), and the tracking and focusing error detections are carried out with multi-segment optical sensors (14,15) which are connected in a complementary manner. As a result, the influence of the tracking error on the focusing error detection is eliminated, and the linearity of the focusing error detection is improved.

33. 发明公开

EP0418702A3 Disk drive apparatus having improved initialization process 失效
标题翻译：具有改进的初始化过程的磁盘驱动装置
公开(公告)号：EP0418702A3
公开(公告)日：1992-05-06
申请号：EP90117434.2
申请日：1990-09-11
申请人： FUJITSU LIMITED
发明人： Yanagi, Shigenori
IPC分类号： G11B19/20 , G11B19/28 , G11B7/007 , G11B7/09 , G11B7/125
CPC分类号： G11B20/1217 , G11B7/0053 , G11B7/00736 , G11B7/08511 , G11B7/09 , G11B7/0945 , G11B7/126 , G11B11/10595 , G11B19/20 , G11B19/28 , G11B27/3027
摘要： A disk drive apparatus includes a driving circuit (14) which rotates a recording media (10) having a disk shape, and a read/write head (22) movable in a radial direction of the recording media and a vertical direction substantially perpendicular to a plane of the radial direction. The read/write head writes data on the recording media and reads data therefrom. The disk drive apparatus also includes an initialization unit (16, 18, 20) which initializes the read/write head during a period (t₁-t₅; t₁-t₄) until the recording media starts to rotate and the rotating speed of the recording media reaches a predetermined constant speed so that the disk drive apparatus is set to a read/write enable state where the read/write head is correctly positioned with respect to the recording media in order to correctly write data on the recording media and read data therefrom.

34. 发明授权

EP0241267B1 Optical recording medium 有权
标题翻译：光学记录介质
公开(公告)号：EP0241267B1
公开(公告)日：1992-04-01
申请号：EP87303015.9
申请日：1987-04-07
申请人： CANON KABUSHIKI KAISHA
发明人： Endo, Kiyonobu
IPC分类号： G11B7/007 , G11B7/013
CPC分类号： G11B7/24 , G11B7/0033 , G11B7/09

35. 发明公开

EP0475673A1 Information recording reproducing apparatus 失效
标题翻译： Gerätzum Aufzeichnen und Wiedergeben von信息。
公开(公告)号：EP0475673A1
公开(公告)日：1992-03-18
申请号：EP91308113.9
申请日：1991-09-04
申请人： CANON KABUSHIKI KAISHA
发明人： Suzuki, Yasuo, Canon Kabushiki Kaisha
IPC分类号： G11B7/08 , G11B7/085 , G11B7/09
CPC分类号： G11B7/08582 , G11B7/09
摘要： In a separation type optical head which is divided into two portions, i.e., a fixed head portion and a carriage portion and which effects at least one of recording, reproduction and erasing on a disk-like recording medium by a light beam, optical parts constituting the fixed head portion are directly mounted on the surface of a base bed on which is mounted a guide member for supporting the carriage portion for seeking.
摘要翻译：在被分割成两部分的分离型光头中，即固定头部和托架部分，并且通过光束对盘状记录介质进行记录，再现和擦除中的至少一个，构成固定头部直接安装在基座的表面上，在基座的表面上安装有用于支撑托架部分用于寻找的引导构件。

36. 发明公开

EP0446284A4 DITHERING OPTICAL DATA LOGGER 失效
标题翻译：无光数据记录器
公开(公告)号：EP0446284A4
公开(公告)日：1992-03-11
申请号：EP90900704
申请日：1989-11-06
申请人： DREXLER TECHNOLOGY CORPORATION
发明人： ZURBRICK, LARRY, S. , HAZEL, ROBERT, LAWRENCE
IPC分类号： G11B7/0033 , G11B7/09
CPC分类号： G11B7/09 , G11B7/0033 , G11B7/0927

37. 发明公开

EP0295313A4 Optical memorizing device 失效
标题翻译：光学记忆装置
公开(公告)号：EP0295313A4
公开(公告)日：1991-11-21
申请号：EP88900609
申请日：1987-12-14
申请人： INST MODELIROVAN ENERGET AN
发明人： ANTONOV, ALEXANDR ALEXANDROVICH , PETROV, VYACHESLAV VASILIEVICH
IPC分类号： G11B7/00 , G01D15/14 , G11B7/0025 , G11B7/085 , G11B7/09 , G11B7/24 , G11B25/02
CPC分类号： G01D15/14 , G11B7/0025 , G11B7/09 , G11B25/02

38. 发明公开

EP0442712A2 Optical information recording and/or reproducing apparatus 失效
标题翻译： Optisches Informationsaufzeichnungs- und / oderWiedergabegerät。
公开(公告)号：EP0442712A2
公开(公告)日：1991-08-21
申请号：EP91301139.1
申请日：1991-02-13
申请人： CANON KABUSHIKI KAISHA
发明人： Sato, Mikio, c/o Canon Kabushiki Kaisha
IPC分类号： G11B7/09 , G11B7/085 , G11B7/095
CPC分类号： G11B7/126 , G11B7/004 , G11B7/09
摘要： In apparatus for recording information and/or reproducing information by irradiating a light beam to a disk shaped optical recording medium, there are provided an adjusting mechanism for adjusting an irradiation state of the light beam to the recording medium, a detector (1) for detecting an irradiation sate error signal of the light beam transmitted or reflected from the recording medium to the recording medium. Further, there are provided a feedback circuit, a storing device and providing circuit. In the feedback circuit, the irradiation state error signal obtained by the detector is sampled at a predetermined rate to generate a control signal for the adjusting mechanism by use of the sampled irradiation state error signal, and the control signal is fed back to the adjusting mechanism. The sampling of the irradiation state error signal is effected at a different rate from that in the detector and the sampled irradiation state error signal is stored in the storing device. The irradiation state error signal stored in the device is input to the feedback circuit by the providing circuit.
摘要翻译：在用于通过将光束照射到盘形光学记录介质上来记录信息和/或再现信息的设备中，设置有用于调节光束到记录介质的照射状态的调节机构，用于检测光束的检测器（1）从记录介质传输或反射到记录介质的光束的照射相位误差信号。此外，提供了反馈电路，存储装置和提供电路。在反馈电路中，以预定的速率对由检测器获得的照射状态误差信号进行采样，通过使用采样的照射状态误差信号产生用于调节机构的控制信号，并将控制信号反馈到调节机构。照射状态误差信号的采样以与检测器不同的速率进行，并且将采样的照射状态误差信号存储在存储装置中。存储在装置中的照射状态误差信号由提供电路输入到反馈电路。

39. 发明公开

EP0327090A3 Optical recording/reproducing apparatus 失效
标题翻译：光学记录/再现设备
公开(公告)号：EP0327090A3
公开(公告)日：1991-08-21
申请号：EP89101822.8
申请日：1989-02-02
申请人： OLYMPUS OPTICAL CO., LTD.
发明人： Rokutan, Takao
IPC分类号： G11B7/00 , G11B7/09
CPC分类号： G11B7/09 , G11B7/0033
摘要： A laser beam from a laser source (1) is incident on a track (8) of an optical card (7) through an objective lens (3). Since the optical card (7) is reciprocated along a track direction, the laser beam is scanned on the track (8). The light beam reflected by the optical card (7) is guided to a photo-detector (6) through the objective lens (3) and a mirror (5). An objective lens actuator (2) and an objective lens position sensor (4) are arranged near the objective lens (3). The objective lens actuator (2) performs tracking of the laser beam by moving the objective lens (3) in a direction perpendicular to the track (8), and focuses the objective lens (3) by moving it in a direction perpendicular to the optical card (7). The lens position sensor (4) detects the displacement of the lens (3) during tracking. A track-error signal generated from the photo-detector (6) is supplied to the actuator (2) through a phase compensate circuit (23) and a power amplifier (24), thus performing tracking servo control. An output from the lens position sensor (4) is supplied to an off-track detector (25). The off-track detector (25) is constituted by a low-pass filter (51) for cutting a high-frequency component, such as noise, a DC-cut circuit (52), and a window comparator (53).

40. 发明公开

EP0370655A3 Optical pick-up devices 有权
标题翻译：光学拾取器件
公开(公告)号：EP0370655A3
公开(公告)日：1991-05-08
申请号：EP89311500.6
申请日：1989-11-07
申请人： SONY CORPORATION
发明人： Kume, Hidehiro Patents Division , Yamamoto, Etsufumi Patents Division , Matsumoto, Yoshiyuki Patents Division
IPC分类号： G11B7/09 , G11B7/12 , G11B7/125 , G11B7/13
CPC分类号： G11B7/09 , G11B7/123 , G11B7/13
摘要： An optical pick-up device for a recording and/or reproducing apparatus in which a light beam (31) from a semiconductor laser element (14) is converged by an objective lens (1) and irradiated on recording tracks (t R ) of an optical disc (101) and the light reflected by the disc (101) is sensed to read and/or record data signals, includes photosensors (17, 18) each having an insensitive central zone (17b, 18b) and arranged to receive the reflected light to generate tracking error signals (T E ). The semiconductor laser element (14) is so arranged that the light beam (31) is projected on the disc (101) so that the meridional plane of the light beam (31) extending orthogonal to the junction plane of semiconductor layers of the semiconductor laser element (14) is at such an angle with respect to a tangential line drawn to one of the recording tracks (t R ) of the disc (101) that non-symmetries on both sides of the tangential line as a function of the de-focusing direction of the beam spot are compensated.

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