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公开(公告)号：EP0580936A1
公开(公告)日：1994-02-02
申请号：EP93101345.2
申请日：1993-01-29
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903
摘要： A diffraction element including a diffraction grating for dividing a light beam, emitted from a light source along a predetermined path, into a principal light beam and at least two auxiliary light b eams, and a hologram for separating the beam, which has been reflected from an optical information recording medium, from the predetermined path. The diffraction grating and the hologram are integrated together in the form as formed in opposite portions of a block of glass or plastics in alignment with each other. A slide provided in at least a portion of the diffraction element for sliding engagement with a cylindrical surface axial with an optical axis of the diffraction element to permit the diffraction element to be rotatable about the optical axis.
摘要翻译： 一种衍射元件，包括用于将从光源沿着预定路径发射的光束划分成主光束和至少两个辅助光b电子束的衍射光栅和用于分离光束的全息图，该全息图已经从 光学信息记录介质。 衍射光栅和全息图以形成在彼此对准的玻璃或塑料块的相对部分中的形式集成在一起。 设置在衍射元件的至少一部分中的滑块，用于与轴向与衍射元件的光轴轴向滑动接合，以允许衍射元件围绕光轴旋转。
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公开(公告)号：EP1049085A3
公开(公告)日：2000-12-06
申请号：EP00303529.2
申请日：2000-04-27
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G02B5/1866 , G11B7/0903 , G11B7/123 , G11B7/1356 , G11B11/10543 , G11B11/10576
摘要： An optical device includes a light-emitting element (1) for irradiating light onto an information recording medium (6), a diffraction grating (2) for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member (5) for focussing the plurality of beams onto the information recording medium (6), a deflection member (3) for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector (7) for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating (2) has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or -1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.
摘要翻译： 一种光学装置包括：用于将光照射到信息记录介质（6）上的发光元件（1），用于将从所述发光元件发射的光分成多个光束的衍射光栅（2），聚焦元件 5），用于将多个光束聚焦到信息记录介质（6）上;偏转部件（3），用于在多个光束从信息记录介质反射后使其偏转; 和一个光检测器（7），用于在多个光束被偏转元件偏转之后接收多个光束。 衍射光栅（2）具有衍射效率不同的第一光栅区域和第二光栅区域。 第一光栅区域中的零级衍射光被用作用于再现信息信号的主光束，并且第二光栅区域中的+1级或-1级衍射光被用作用于再现 跟踪误差信号。 因此，可以在不增加半导体激光元件1的发光的情况下增加主光束和副光束的光量，并且可以增强主光束和副光束的S / N比。
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公开(公告)号：EP1049085A2
公开(公告)日：2000-11-02
申请号：EP00303529.2
申请日：2000-04-27
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G02B5/1866 , G11B7/0903 , G11B7/123 , G11B7/1356 , G11B11/10543 , G11B11/10576
摘要： An optical device includes a light-emitting element (1) for irradiating light onto an information recording medium (6), a diffraction grating (2) for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member (5) for focussing the plurality of beams onto the information recording medium (6), a deflection member (3) for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector (7) for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating (2) has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or ―1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.
摘要翻译： 一种光学装置包括：用于将光照射到信息记录介质（6）上的发光元件（1），用于将从所述发光元件发射的光分成多个光束的衍射光栅（2），聚焦元件 5），用于将多个光束聚焦到信息记录介质（6）上;偏转部件（3），用于在多个光束从信息记录介质反射后使其偏转; 和一个光检测器（7），用于在多个光束被偏转元件偏转之后接收多个光束。 衍射光栅（2）具有衍射效率不同的第一光栅区域和第二光栅区域。 第一光栅区域中的零级衍射光被用作用于再现信息信号的主光束，并且第二光栅区域中的+1级或-1级衍射光被用作用于再现 跟踪误差信号。 因此，可以在不增加半导体激光元件1的发光的情况下增加主光束和副光束的光量，并且可以增强主光束和副光束的S / N比。
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公开(公告)号：EP1033796A2
公开(公告)日：2000-09-06
申请号：EP00301629.2
申请日：2000-02-29
CPC分类号： H01S5/2231 , H01S5/222 , H01S5/2226
摘要： A semiconductor laser (LS1), including: an n-type cladding layer (3) that has n-type conductivity; an active layer (4) formed on top of the n-type cladding layer; a p-type cladding base layer (5) that is formed on top of the active layer (4) and has p-type conductivity; a current-blocking layer (13) that is formed on specified parts of an upper surface of the p-type cladding base layer (5) and substantially has n-type conductivity; and a p-type buried cladding layer (7) that has p-type conductivity and is formed so as to cover the current-blocking layer (13) and contact remaining parts of the upper surface of the p-type cladding base layer (5). The current-blocking layer (13) has at least two regions (13a,13b) having different concentrations (hereafter "N1" and "N2" where N1
摘要翻译： 一种半导体激光器（LS1），包括：具有n型导电性的n型包覆层（3） 形成在n型覆层顶部上的有源层（4） 形成在有源层（4）上并具有p型导电性的p型覆层基底层（5） 形成在所述p型包覆基底层（5）的上表面的特定部分上且基本上具有n型导电性的电流阻挡层（13） 和具有p型导电性且形成为覆盖电流阻挡层（13）并与p型包覆基底层（5）的上表面的剩余部分接触的p型埋入包覆层（7） ）。 电流阻挡层（13）具有n型载流子的浓度不同的至少两个区域（13a，13b）（以下称为“N1”和“N2”，其中N1
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公开(公告)号：EP0617420A1
公开(公告)日：1994-09-28
申请号：EP94104868.8
申请日：1994-03-28
CPC分类号： G11B7/127 , G11B7/0903 , G11B7/094 , G11B7/123 , H01L2224/48091 , H01L2224/73265 , H01S5/02248 , H01S5/02252 , H01S5/02292 , H01S2301/176 , H01L2924/00014
摘要： An optical head for optical recording and reproducing apparatuses is disclosed, which comprises
a semiconductor laser,
a mirror for reflecting a light beam emitted from the semiconductor laser,
a diffraction grating for dividing the light beam into zero-order, plus and minus first-order beams,
a holographic diffraction grating being arranged at an optical path of the beams divided by the diffraction grating,
an objective lens for focusing the beams on a disk and causing the beams reflected from the disk to be incident on the holographic diffraction grating to diffract the beams, and
a photodetector for detecting a tracking error signal by receiving the beams diffracted by the holographic diffraction grating,
the semiconductor laser has a beam incident area which the beam reflected from the disk is incident,
the beam incident area acts to scatter or to absorb the incident beam.
As a result, the optical head is able to obtain the stable tracking error signal.摘要翻译： 公开了一种用于光学记录和再现设备的光学头，其包括半导体激光器，用于反射从半导体激光器发射的光束的反射镜，用于将光束分成零级，正负一级的衍射光栅 全息衍射光栅布置在由衍射光栅分开的光束的光路上;物镜，用于将光束聚焦在光盘上并使从光盘反射的光束入射到全息衍射光栅上以衍射 光束以及用于通过接收由全息衍射光栅衍射的光束来检测跟踪误差信号的光电检测器，半导体激光器具有从光盘反射的光束入射的光束入射区域，光束入射区域用于散射或吸收 入射光束。 结果，光学头能够获得稳定的跟踪误差信号。
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6.发明公开An optical pickup with improved optical properties, and a method for manufacturing the optical pickup 有权光学扫描设备具有改进的光学特性，并且光学扫描的制造方法
公开(公告)号：EP1089268A2
公开(公告)日：2001-04-04
申请号：EP00308232.8
申请日：2000-09-20
发明人： Nakanishi, Hideyuki , Takasuka, Shoichi , Ijima, Shinichi , Yoshikawa, Akio , Onozawa, Kazutoshi , Yamanaka, Kazuhiko , Nakanishi, Naoki
IPC分类号： G11B7/085
CPC分类号： G11B7/0933 , G11B7/0932 , G11B7/0935 , G11B7/123 , G11B7/22 , H01L2224/48091 , H01L2224/48227 , H01L2924/00014
摘要： A movable enclosure contains optical components, such as an objective lens, a semiconductor laser, a mirror, and a photodetector. The movable enclosure is supported by a fixed member via a plurality of wires that are positioned in parallel. This construction allows the movable enclosure to move in a tracking direction and a focusing direction. The plurality of wires are insulated from one another to be also used as power-supplying lines and signal lines for the semiconductor laser and the photodetector.
摘要翻译： 一个可移动的外壳中包含的光学元件，颜色：诸如物镜，半导体激光器，反射镜，以及光电检测器。 可动框体由固定构件通过导线的多元性没被并行定位支持。 这种结构使可动框体，以在跟踪方向和聚焦方向移动。 导线的多元性彼此绝缘，如此使用作为半导体激光器和光电检测器供电线和信号线。
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公开(公告)号：EP1035624A2
公开(公告)日：2000-09-13
申请号：EP00301607.8
申请日：2000-02-29
发明人： Fukuhisa, Toshiya , Yoshikawa, Akio
CPC分类号： B82Y20/00 , H01S5/209 , H01S5/222 , H01S5/2231 , H01S5/305 , H01S5/34326
摘要： A semiconductor laser, includes: a first cladding layer; an active layer that is formed on top of the first cladding layer; a second cladding layer that is formed on top of the active layer and has a different type of conductivity to the first cladding layer; an etch-stop layer that is formed on top of the second cladding layer and has a same type of conductivity as the second cladding layer; and a light-confining construction that is formed on top of the etch-stop layer by an etching process. The etch-stop layer has a surface part that contacts the light-confining construction. This surface part is composed of an (Al x Ga 1-x ) y In 1-y P semiconductor, where 0.2≤x
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公开(公告)号：EP0607808B1
公开(公告)日：1999-06-23
申请号：EP94100132.3
申请日：1994-01-05
IPC分类号： H01L21/308
CPC分类号： H01L21/308 , Y10S438/942
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9.发明公开
公开(公告)号：EP1083602A2
公开(公告)日：2001-03-14
申请号：EP00119722.7
申请日：2000-09-09
IPC分类号： H01L23/495 , H01L31/02 , H01L33/00
CPC分类号： H01L23/49568 , H01L23/49503 , H01L23/49541 , H01L23/49548 , H01L31/0203 , H01L33/62 , H01L2924/0002 , H01L2924/00
摘要： A lead frame includes a die pad including a die pad main portion having a large thickness and a die pad peripheral portion having an intermediate thickness smaller than that of the die pad main portion, provided on at least one side of the die pad main portion, at least one support lead connected to the die pad, and at least two first inner leads having a small thickness smaller than that of the die pad peripheral portion, arranged such that end portions thereof are opposed to the die pad peripheral portion. The thick die pad provides good heat release properties, and reducing the thickness of the leads allows fine pitched leads to be produced. Such a lead frame can be manufactured easily by press stamping after belt-shaped regions having different thickness are formed by rolling.
摘要翻译： 的引线框架包括：一个所述垫包含具有大厚度和具有中间厚度比所述芯片安装区本体部分的直径小一的芯片安装区周边部分，设置在所述芯片安装区本体部分的至少一侧上的衬垫主体部分， 至少一个支撑引线连接到所述管芯焊盘，且厚度小比管芯焊盘周边部分的小的至少两个第1内引线，布置搜索做其端部相对于所述垫周边部分。 厚，垫可提供良好的散热特性，并减少引线的厚度允许产生的细间距的引线。 这样的引线框架可以通过冲压具有不同厚度的带状区域后容易冲压来制造通过轧制形成。
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公开(公告)号：EP0617420B1
公开(公告)日：1999-07-21
申请号：EP94104868.8
申请日：1994-03-28
CPC分类号： G11B7/127 , G11B7/0903 , G11B7/094 , G11B7/123 , H01L2224/48091 , H01L2224/73265 , H01S5/02248 , H01S5/02252 , H01S5/02292 , H01S2301/176 , H01L2924/00014
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