公开(公告)号：EP1225575A3

公开(公告)日：2005-10-05

申请号：EP02005142.1

申请日：1991-01-30

申请人： SONY CORPORATION

发明人： Watanabe, Tetsu ,  Aoki, Yoshio

IPC分类号： G11B7/24 ,  G11B11/10

CPC分类号： G11B11/10584 ,  G11B7/0037 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/24056 ,  G11B11/10532 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10558

摘要： The present invention relates for a recordable optical disc, which comprises a recordable layer (43) onto which a laser beam is converged by an objective lens (2) having a numerical aperture (NA) falling within a range of about 0.55 to 0.70, and a light-transmitting substrate (41) supporting the recordable layer (43), the light-transmitting substrate (41) having a thickness falling within a range of about 0.1 to 0.6 mm and transmitting the laser beam therethrough to and converged on the recordable layer (43).

摘要翻译： 本发明涉及一种可记录光盘，其包括可记录层（43），激光束由数值孔径（NA）落在约0.55至0.70范围内的物镜（2）会聚在其上，以及 支撑可记录层（43）的透光基板（41），所述透光基板（41）具有落在约0.1至0.6mm范围内的厚度，并将激光束透过并将其会聚在可记录层 （43）。

公开(公告)号：EP1151796A3

公开(公告)日：2004-03-31

申请号：EP01401118.3

申请日：2001-04-27

申请人： SONY CORPORATION

发明人： Yamada, Masahiro ,  Kouchiyama, Akira ,  Watanabe, Tetsu

IPC分类号： B02B3/12 ,  G02B9/00 ,  B29D11/00 ,  G11B7/135 ,  G02B3/12 ,  G12B21/06 ,  G02B7/02 ,  G03F7/00 ,  C03B11/07 ,  G02B1/02

CPC分类号： G02B6/4214 ,  G02B3/0087 ,  G02B6/262 ,  G02B6/30 ,  G02B6/4203 ,  G02B6/4204 ,  G02B6/4246

摘要： A first optical device (1100) according to the present invention comprises a base (1101) made of a first optical material and a second optical material (1102) having a refractive index different from that of the first optical material, and the base has a concavity (1101B), and the second optical material (1102) is filled in this concavity. A second optical device (1110) according to the present invention comprises a base (1111) made of a first optical material and a second optical material having a refractive index different from the first optical material, and the base (1111) comprises first and second faces facing each other, a first concavity (1101B) is formed in the first face (1110U) and a second concavity (1111B) is formed in the second face (1110B), and the second optical material is filled in the first (1101B) and second (1111B) concavities.

摘要翻译： 根据本发明的第一光学器件（1100）包括由第一光学材料制成的基底（1101）和具有与第一光学材料的折射率不同的折射率的第二光学材料（1102），并且基底具有 凹部（1101B）和第二光学材料（1102）填充在该凹部中。 根据本发明的第二光学装置（1110）包括由第一光学材料制成的基座（1111）和具有不同于第一光学材料的折射率的第二光学材料，并且基座（1111）包括第一和第二 在第一面（1110U）中形成有第一凹部（1101B），在第二面（1110B）中形成有第二凹部（1111B），第二凹部（1101B）被填充在第一面（1101B）中， 和第二（1111B）个凹面。

公开(公告)号：EP0910077A3

公开(公告)日：2002-01-16

申请号：EP98119496.2

申请日：1998-10-15

申请人： Hitachi, Ltd. ,  SONY CORPORATION ,  SHARP KABUSHIKI KAISHA ,  OLYMPUS OPTICAL CO., LTD. ,  SANYO ELECTRIC Co., Ltd. ,  FUJITSU LIMITED ,  HITACHI MAXELL, LTD.

发明人： Tanaka, Yasuhito ,  Kurebayashi, Masaaki ,  Maeda, Takeshi ,  Watanabe, Hitoshi ,  Watanabe, Tetsu ,  Maeda, Shigemi ,  Sumi, Satoshi ,  Matsubayashi, Nobuhide ,  Matsuura, Michio

IPC分类号： G11B11/10

CPC分类号： G11B7/126 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0956 ,  G11B11/10515 ,  G11B11/10576 ,  G11B11/10595

摘要： A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium (1) at least including a first magnetic film having magneto-optical information recorded on a track and having perpendicular magnetic anisotropy, and a second magnetic film to which the magneto-optical information recorded on the first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto the second magnetic film to thereby readout the magneto-optical information transferred to the second magnetic film. The apparatus includes a 2-split detection circuit (18) constituted by two detection elements (18a, 18b) for receiving the readout laser beam reflected from the second magnetic film of the magneto-optical information recording medium, and a subtraction circuit (19) in which output signals of the two detection elements of the 2-split detection circuit having levels corresponding to the quantities of light received by the two detection elements respectively are subtracted from each other to generate a differential signal expressing the difference between the output signals. The apparatus further comprises a circuit (22, 23) for making a spot of the laser beam jump one track before readout of the magneto-optical information from the magneto-optical information recording medium, a positive/negative balance correction circuit (20) for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in the differential signal from the subtraction circuit in response to the track jump to thereby output a correction signal in accordance with the amplitude ratio, and an addition circuit (21) for adding the correction signal to the differential signal to thereby generate a tracking error signal for tracking control used in readout of the magneto-optical information from the magneto-optical information recording medium.

公开(公告)号：EP0923074A1

公开(公告)日：1999-06-16

申请号：EP99104762.2

申请日：1991-01-30

申请人： Sony Corporation

发明人： Watanabe, Tetsu ,  Aoki, Yoshio

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B11/10584 ,  G11B7/0037 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/24056 ,  G11B11/10532 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10558

摘要： The present invention relates to an optical recording and/or reproducing apparatus using an optical recording medium having a light-transmitting cover layer (17, 18) capable of transmitting a light beam and a recording layer (16) provided below a light incident surface of the light-transmitting cover layer (17, 18), said apparatus comprising: a light source (1) for generating a light beam, and an objective lens (2) for converging the light beam radiated from said light source on the recording layer (16) through the light-transmitting cover layer. The ratio of a minimum diameter (2ω 0 ) of the convergent light beam when the light beam is converged by said objective lens and the wavelength λ of the light beam generated from said light source is represented by equation below; 2ω 0 /λ = 0.82/NA wherein NA is the numerical aperture of said objective lens falling within a range of 0.55 to 0.70.

摘要翻译： 本发明涉及一种使用光记录介质的光记录和/或再现装置，所述光记录介质具有能够传输光束的透光覆盖层（17,18）和设置在光入射表面下方的记录层（16） 所述透光覆盖层（17,18），所述装置包括：用于产生光束的光源（1）和用于将从所述光源辐射的光束会聚在记录层上的物镜（2） 16）通过透光覆盖层。 当由所述物镜会聚光束时会聚光束的最小直径（2ω0）与由所述光源产生的光束的波长λ的比率由下式表示; 其中NA是所述物镜的数值孔径落在0.55至0.70的范围内。

公开(公告)号：EP0811972A3

公开(公告)日：1998-03-25

申请号：EP97114288.0

申请日：1993-04-27

申请人： SONY CORPORATION

发明人： Kawashima, Tetsuji ,  Watanabe, Tetsu

IPC分类号： G11B7/12 ,  G11B7/09 ,  G11B7/00 ,  G11B19/14 ,  G11B11/10

CPC分类号： G11B19/14 ,  G11B7/08517 ,  G11B11/10508 ,  G11B11/10573 ,  G11B11/10595

摘要： A optical disc recording apparatus includes an optical head (33), a position detector (35), a controller (38). The optical head (33) emits a light beam to the optical disc through a substrate of the optical disc (33), and has an actuator (33D) for moving an objective lens in a tracking direction. The position detector (35) detects the displacement of the actuator (33D). The controller (38) controls a recording operation of the optical head (33). The recording operation is started when a result of detection by the position detector (35) reaches a predetermined value.

摘要翻译： 磁光盘记录装置包括磁头，光头，位置检测器和控制器。 磁头将对应于记录数据的垂直磁场提供给磁光盘。 光头通过磁 - 光盘的基片将光束发射到磁 - 光盘。 磁光盘布置在磁头和光头之间。 光学头具有用于在跟踪方向上移动物镜的致动器。 位置检测器检测致动器的位移。 控制器控制磁头和光学头的记录操作。 当位置检测器的检测结果达到预定值时，记录操作开始。

公开(公告)号：EP0715303A2

公开(公告)日：1996-06-05

申请号：EP96100707.7

申请日：1991-01-30

申请人： SONY CORPORATION

发明人： Watanabe, Tetsu ,  Aoki, Yoshio

IPC分类号： G11B11/10 ,  G11B7/24 ,  G11B7/135

CPC分类号： G11B11/10584 ,  G11B7/0037 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/24056 ,  G11B11/10532 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10558

摘要： Disclosed is an optical recording medium, an optical recording/reproducing apparatus and an optical system for use with such an optical recording medium including a light source for generating a light beam and at least one objective lens for converging the light beam on an optical axes thereof, the numerical aperture of the objective lens falling within a range of 0.55 to 0.70 and said recording medium comprising a first recording layer (16), first light-transmitting cover layer (18) provided on the one side surface of said first recording layer to cover said first recording layer and having a first light incident surface irradiated by the light beam through the objective lens (2). Further, a second recording layer (16') is provided in parallel to said first recording layer and a second light-transmitting cover layer (18') is laid over the one side surface of said second recording layer. A second light incident surface is provided irradiated by the light beam through that objective lens. According to the invention, each thickness of said first and said second light-transmitting cover layers are selected to fall within a range of 0.6 to 0.1 mm. Further, the ratio of a minimum diameter (2ω₀) of the light beam converged by said objective lens in relation to the wave length λ of the light beam is set to 2ω₀/λ = 0.82/NA wherein NA is the numerical aperture of said objective lens falling within a range of 0.5 to 0.70.

摘要翻译： 公开了一种光记录介质，光记录/再现装置和光学系统，用于包括用于产生光束的光源和用于在其光轴上会聚光束的至少一个物镜的这种光学记录介质 ，所述物镜的数值孔径落在0.55至0.70的范围内，并且所述记录介质包括第一记录层（16），设置在所述第一记录层的一个侧表面上的第一透光覆盖层（18） 覆盖所述第一记录层并且具有通过所述物镜（2）被所述光束照射的第一光入射面。 此外，与所述第一记录层平行地设置第二记录层（16'），并且在所述第二记录层的一个侧表面上铺设第二透光覆盖层（18'）。 由通过该物镜的光束照射第二光入射面。 根据本发明，所述第一透光性覆盖层和所述第二透光性覆盖层的厚度被选择为在0.6〜0.1mm的范围内。 此外，由所述物镜会聚的光束的最小直径（2ωo）相对于光束的波长λ的比率被设定为2ω0 /λ= 0.82 / NA，其中NA是数值 所述物镜的光圈落在0.5至0.70的范围内。

公开(公告)号：EP0923074B1

公开(公告)日：2002-09-04

申请号：EP99104762.2

申请日：1991-01-30

申请人： Sony Corporation

发明人： Watanabe, Tetsu ,  Aoki, Yoshio

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B11/10584 ,  G11B7/0037 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/24056 ,  G11B11/10532 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10558

公开(公告)号：EP1225575A2

公开(公告)日：2002-07-24

申请号：EP02005142.1

申请日：1991-01-30

申请人： SONY CORPORATION

发明人： Watanabe, Tetsu ,  Aoki, Yoshio

IPC分类号： G11B7/24

CPC分类号： G11B11/10584 ,  G11B7/0037 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/24056 ,  G11B11/10532 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10558

摘要： The present invention relates for a recordable optical disc, which comprises a recordable layer (43) onto which a laser beam is converged by an objective lens (2) having a numerical aperture (NA) falling within a range of about 0.55 to 0.70, and a light-transmitting substrate (41) supporting the recordable layer (43), the light-transmitting substrate (41) having a thickness falling within a range of about 0.1 to 0.6 mm and transmitting the laser beam therethrough to and converged on the recordable layer (43).

摘要翻译： 本发明涉及一种可记录光盘，它包括一个可记录层（43），激光束通过数值孔径（NA）落在大约0.55至0.70范围内的物镜（2）会聚在该记录层上，以及 支撑所述可记录层（43）的透光基片（41），所述透光基片（41）的厚度落入大约0.1-0.6mm的范围内，并将所述激光束通过所述透射基片传输到所述可记录层并在所述可记录层上会聚 （43）。

公开(公告)号：EP0811972A2

公开(公告)日：1997-12-10

申请号：EP97114288.0

申请日：1993-04-27

申请人： SONY CORPORATION

发明人： Kawashima, Tetsuji ,  Watanabe, Tetsu

IPC分类号： G11B7/12 ,  G11B7/09 ,  G11B7/00 ,  G11B19/14 ,  G11B11/10

CPC分类号： G11B19/14 ,  G11B7/08517 ,  G11B11/10508 ,  G11B11/10573 ,  G11B11/10595

摘要： A optical disc recording apparatus includes an optical head (33), a position detector (35), a controller (38). The optical head (33) emits a light beam to the optical disc through a substrate of the optical disc (33), and has an actuator (33D) for moving an objective lens in a tracking direction. The position detector (35) detects the displacement of the actuator (33D). The controller (38) controls a recording operation of the optical head (33). The recording operation is started when a result of detection by the position detector (35) reaches a predetermined value.

摘要翻译： 光盘记录装置包括光头（33），位置检测器（35），控制器（38）。 光头（33）通过光盘（33）的基板向光盘发射光束，并具有用于在跟踪方向上移动物镜的致动器（33D）。 位置检测器（35）检测致动器（33D）的位移。 控制器（38）控制光学头（33）的记录操作。 当位置检测器（35）的检测结果达到预定值时，开始记录操作。

公开(公告)号：EP0429343B1

公开(公告)日：1997-01-15

申请号：EP90403238.0

申请日：1990-11-15

申请人： SONY CORPORATION

发明人： Watanabe, Tetsu ,  Yamagami, Tamotsu ,  Fujita, Goro

IPC分类号： G11B11/10

CPC分类号： G11B11/10513 ,  G11B11/1053