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公开(公告)号：EP1524653A3
公开(公告)日：2008-08-27
申请号：EP04024402.2
申请日：2004-10-13
发明人： Arai, Akihiro
CPC分类号： G11B7/1381 , G11B7/007 , G11B7/09 , G11B7/0956 , G11B7/131 , G11B7/1353
摘要： A tilt sensor includes a photodetector having a photosensitive plane (6) and detecting a light beam in multiple areas and outputting detection signals representing its intensities and a tilt detector for generating a tilt error signal, including information about the tilt of a disk, based on the detection signals. The light beam forms a beam spot (10) on the photosensitive plane. The beam spot includes a + first-order light area (10b) in which zero-order and + first-order light rays, diffracted by a track on the disk, are superposed, - first-order light area (10c) in which zero-order and - first-order light rays are superposed, and a zero-order light area (10a) which is sandwiched between the + first-order and - first-order light areas, includes neither the + first-order nor - first-order light ray, but includes a zero-order light ray. The photodetector generates the detection signals except for light entering an opaque area (11) provided for at least part of the zero-order light area.
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12.发明授权Optical pickup device, error detection device, and detection method therefor 有权用于错误检测的光学扫描装置，和检测方法为此
公开(公告)号：EP0949610B1
公开(公告)日：2008-05-14
申请号：EP99106167.2
申请日：1999-04-08
发明人： Ohyama, Minoru
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/0912 , G11B7/0943 , G11B7/123 , G11B7/1353 , G11B2007/0006
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13.发明授权Optical head, optical drive apparatus, and method for generating tracking error signal 有权用于光盘和用于产生跟踪误差信号方法的一个光学头驱动装置
公开(公告)号：EP1605448B1
公开(公告)日：2008-01-09
申请号：EP05291214.4
申请日：2005-06-07
申请人： Sony Corporation
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/0943 , G11B2007/0013
摘要： An optical head includes a laser light source, an optical system that applies 0-order diffracted light, +1-order diffracted light (SB1), and -1-order diffracted light (SB2), which are produced from laser light emitted from the laser light source, onto a recording medium having a plurality of information recording layers, and a light-receiving device for detecting reflected light guided by the optical system. The light-receiving device includes a first light-receiving section (A, B, C, D) for detecting reflected light of the 0-order diffracted light, two second light-receiving sections ((E, F), (G, H)) for detecting reflected light of the +1-order diffracted light (SB1) and reflected light of the -1-order diffracted light (SB2), and a third light-receiving section (I, J) provided near at least one of the second light-receiving sections ((E, F), (G, H)) to receive stray light reflected from one or more information recording layers other than a target information recording layer to be accessed.
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公开(公告)号：EP1658608B1
公开(公告)日：2007-10-31
申请号：EP04769805.5
申请日：2004-08-12
摘要： The range of spatial frequencies of the information areas in an optical record carrier ( 130 ) that can be read by conventional means can be increased substantially by providing the information layer ( 1134 ) with a birefringent diffraction grating ( 136 ) and using a read beam (b) that comprises two mutually perpendicular polarised components (b 1 , b 2 ) only one of which will be diffracted by the grating.
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15.发明公开SPOT SIZE FOCUS ERROR DETECTION FOR MULTIPLE BEAM OPTICAL SCANNING DEVICE 审中-公开光束大小故障检测方法的多光束光学扫描设备
公开(公告)号：EP1846926A2
公开(公告)日：2007-10-24
申请号：EP06710757.3
申请日：2006-01-26
CPC分类号： G11B7/0912 , G11B7/131 , G11B7/14
摘要： A device (1) for scanning an optical disc (6), the disc (6) comprising substantially parallel data tracks (10). The device (1) comprises an optical unit for creating track light spots (12) on the data tracks (10) and a plurality of detector light spots on a plurality of signal detectors. The device further comprises a focus error unit for with a beam manipulating element (21, 22, 22a, 92) for providing for at least one of the reflected beams a first optical path (24) to a first segmented detector (8a) and a second optical path (25) to a second segmented detector (8b). The lengths of the first optical path (24) and the second optical path (25) exhibit a difference (Dd), such that an intensity distribution of a first detector light spot on the first segmented detector (8a) is equal to an intensity distribution of a second detector light spot on the second segmented detector (8b) when the at least one track light spot is correctly focussed and that the intensity distribution on the first segmented detector (8a) differs from the intensity distribution on the second segmented detector (8b) when the at least one track light spot is not correctly focussed. The difference (Dd) is substantially less than a quotient of a distance between two adjacent detector light spots (Ds) and a numerical aperture (NA) of the lens (7). A dimension (Dl) of a light detecting area of the segmented detectors in a direction of adjacent detector light spots is less than the distance (Ds) between two adjacent detector light spots.
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公开(公告)号：EP1553570A4
公开(公告)日：2007-09-12
申请号：EP03754016
申请日：2003-10-08
发明人： YAMASAKI FUMITOMO , ARAI AKIHIRO
CPC分类号： G11B7/1392 , G11B7/0901 , G11B7/0908 , G11B7/0956 , G11B7/131 , G11B7/133 , G11B7/1381
摘要： An optical head comprising a light source, an object lens, a light splitting means, a light receiving element, a tracking error signal detecting means, and a spherical aberration detecting means, wherein the light splitting means has six regions divided by a first splitting line parallel to the longitudinal direction of information tracks and by second and third splitting lines perpendicular to the first splitting line, and the spherical aberration detecting means compares the deviation of a first focus point obtained from a light flux passed through two regions disposed between second and third splitting lines with the deviation of a second focus point obtained from a light flux passed through four regions disposed on the outer side of the second and third splitting lines to generate a spherical aberration error signal for detecting a spherical aberration generated at the object lens.
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17.发明公开Error signal detection apparatus and reproduction signal detection apparatus for optical recording/reproducing system 审中-公开误差信号检测装置和光学记录的再现信号检测装置/再现系统
公开(公告)号：EP1085509A3
公开(公告)日：2007-01-31
申请号：EP00307964.7
申请日：2000-09-14
发明人： Ma, Byung-in , Choi, Byung-do , Chung, Chong-sam , Park, In-sik , Doh, Tae-yong, 144-1204 Hwanggol Jugong 1-danji Ap , Seo, Joong-eon
CPC分类号： G11B7/0906 , G11B7/0956 , G11B7/131
摘要： An error signal detection apparatus for an optical recording/reproducing system, which includes: a photodetector (30) having eight light receiving portions arranged in a 2×4 matrix, to separately perform photoelectric conversion on light reflected and diffracted from the recording medium, where the eight light receiving portions include four inner light receiving portions (A2,B2,C2,D2) arranged at the center region of the photodetector, and four outer light receiving portions (A1,B1,C1,D1) arranged around the corresponding inner light receiving portions; and a circuit unit (50) that compares the phases of the detection signals of the inner and/or outer light receiving portions arranged in the same row, and outputs a tilt error signal and/or tracking error signal from phase comparison signals. Other embodiments employ other circuit arrangements, including using diagonally opposite signal pairs. Tracking and/or tilting can be more precisely controlled even for a high-density recording medium having narrow tracks.
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公开(公告)号：EP1744308A2
公开(公告)日：2007-01-17
申请号：EP06117011.4
申请日：2006-07-12
发明人： Higashiyama, Yasushi Toshiba Corporation , Aoki, Masahiro Toshiba Corporation , Ueno, Masashi Toshiba Corporation
IPC分类号： G11B7/13
CPC分类号： G11B7/13 , G11B7/0901 , G11B7/0906 , G11B7/094 , G11B7/1275 , G11B2007/0006
摘要： A plurality of light receiving elements (P1 to Pn) photoelectrically convert light signals having information signals, respectively. A plurality of first amplification circuits (I1 to In) amplify currents of electric signals from the respective light receiving elements. A selecting section (53) selectively outputs one of signals amplified by the plurality of first amplification circuits. A second amplification circuit (A1) amplifies a voltage of the signal output from the selecting section, and supplies the signal to the outside.
摘要翻译： 多个光接收元件（P1到Pn）分别光电转换具有信息信号的光信号。 多个第一放大电路（I1至In）放大来自各个光接收元件的电信号的电流。 选择部分（53）选择性地输出由多个第一放大电路放大的信号之一。 第二放大电路（A1）放大从选择部分输出的信号的电压，并将该信号提供给外部。
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公开(公告)号：EP1717802A1
公开(公告)日：2006-11-02
申请号：EP05009102.4
申请日：2005-04-26
CPC分类号： G11B7/1263 , G11B7/131 , G11B7/1362 , G11B7/1365 , G11B7/1369
摘要： The invention relates to a pickup (1) for optical recording media including a monitor diode (14) for light power feedback, the pickup (1) having an increased efficiency and a reduced number of components, and to an apparatus for reading from and/or writing to optical recording media including such a pickup (1).
According to the invention, a pickup (1) for optical recording media includes a light source (2) for emitting a light beam, a monitor diode (14) for obtaining a light power feedback signal, and an optical element (7) for changing a property of the light beam, wherein the optical element (7) has a surface that is inclined with respect to the optical axis and reflects a part of the light beam towards the monitor diode (14).摘要翻译： 本发明涉及一种用于光学记录介质的拾取器（1），其包括用于光功率反馈的监视二极管（14），拾取器（1）具有增加的效率和减少的部件数量，以及用于从和/ 或写入包括这种拾取器（1）的光学记录介质。 根据本发明，用于光学记录介质的拾取器（1）包括用于发射光束的光源（2），用于获得光功率反馈信号的监视二极管（14）和用于改变光功率的光学元件（7） 光束的特性，其中光学元件（7）具有相对于光轴倾斜的表面，并将一部分光束反射到监视二极管（14）。
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公开(公告)号：EP1213712B1
公开(公告)日：2006-09-27
申请号：EP01128652.3
申请日：2001-11-30
申请人： Pioneer Corporation
发明人： Yanagawa, Naoharu , Kato, Masahiro
CPC分类号： G11B7/131 , G11B7/0045 , G11B7/0956 , G11B7/126 , G11B7/1267 , G11B7/1369 , G11B2007/0006
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