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公开(公告)号：US4873429A
公开(公告)日：1989-10-10
申请号：US152007
申请日：1988-02-03
CPC分类号： G11B7/1381 , G11B7/094 , G11B7/1356 , G11B7/0912
摘要： An optical pickup head comprising a substrate on which a optical sensor is formed, and an optical member adhered on said optical sensor on said substrate by an adhesive and including a semitransmissive reflective film adapted to reflect the light emitting from a laser source and to transmit the light returned from a second medium of a disk, characterized in that the refractive index of said optical member is set so as to be larger than the refractive index of said adhesive.
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公开(公告)号：US4893296A
公开(公告)日：1990-01-09
申请号：US219915
申请日：1988-07-15
申请人： Yoshiyuki Matsumoto , Hidehiro Kume , Koji Mitsumori , You Yoshitoshi , Etsufumi Yamamoto , Hiroshi Oinoue
发明人： Yoshiyuki Matsumoto , Hidehiro Kume , Koji Mitsumori , You Yoshitoshi , Etsufumi Yamamoto , Hiroshi Oinoue
CPC分类号： G11B7/1359 , G11B7/123 , G11B7/1356 , H01S5/02248 , H01S5/005 , H01S5/0683
摘要： An optical pickup device having a semiconductor laser element mounted on a substrate, a photo detector formed on the substrate to receive a laser beam emitted from the semiconductor laser element and an optical element mounted on the substrate to cover the photo detector to branch the direction of optical path of the laser beam, the optical element having its face opposing the semiconductor laser element formed as an inclined face on which a semitransparent reflection film is deposited. The optical path branching optical element is provided with preventing means by which, of laser beams incident on the optical element, a laser beam reflected and/or scattered within the optical element is prevented from irradiating the photo detector.
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公开(公告)号：US4823331A
公开(公告)日：1989-04-18
申请号：US130112
申请日：1987-10-23
CPC分类号： G11B7/1356 , G11B7/0912 , G11B7/123 , G11B7/131 , G11B7/0925
摘要： The present invention relates to a focusing detection apparatus (1) for detecting a focusing state of an optical recording medium. So as to achieve compactness and low cost of the focusing detection apparatus (1), focusing detection using two photosensors (33) (34) located in front of and behind a convergent point of a beam (45) reflected by the optical recording medium can be achieved by a single prism (37), and a plurality of optical components (31) (33) (34) (37) are formed integrally and can be arranged on a single surface of a semiconductor substrate (32). The present invention is applicable to an optical head requiring compactness, light weight, and low cost as well as high performance.
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公开(公告)号：US4897828A
公开(公告)日：1990-01-30
申请号：US219916
申请日：1988-07-15
申请人： You Yoshitoshi , Hidehiro Kume , Yoshiyuki Matsumoto , Koji Mitsumori , Etsufumi Yamamoto , Hiroshi Oinoue
发明人： You Yoshitoshi , Hidehiro Kume , Yoshiyuki Matsumoto , Koji Mitsumori , Etsufumi Yamamoto , Hiroshi Oinoue
CPC分类号： G11B7/1356 , G11B7/0912 , G11B7/123 , G11B7/13
摘要： A focusing error detecting apparatus having a first photo-detector of which the light receiving portion is halved to provide first and second light receiving portions asymmetrical with respect to the center of a beam spot of a bundle of incident laser beams, the first photo-detector being located in the optical path ahead of the focusing point of the bundle of the incident laser beams, a second photo-detector of which the light receiving portion is halved to provide first and second light receiving portions asymmetrical with respect to the center of a beam spot of a bundle of incident laser beams, the second photo-detector being located in the optical path behind a focussing point of the bundle of the incident laser beams and a calculating circuit for calculating a difference between a difference of detected outputs from the first and second light receiving portions of the first photo-detector and a difference of detected outputs from the first and second light receiving portions of the second photo-detector, thereby to derive a focusing error signal from the output of the calculating circuit.
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公开(公告)号：US4772784A
公开(公告)日：1988-09-20
申请号：US041140
申请日：1987-04-22
CPC分类号： G11B7/1381 , G02B1/10 , G11B7/123 , H01S5/02248 , H01S5/02292 , H01S5/0683
摘要： A semiconductor laser apparatus having a semiconductor laser diode for radiating a laser beam, a photodetector formed on a semiconductor substrate, a prism having a first plane for introducing the laser beam to a reflecting substance and introducing the beam reflected by the reflecting substance to the photodetector and a second plane facing to the photodetector, and a coating layer formed on the boundary between the semiconductor substrate and the prism, having a refractive index such that the laser beam incident from the first plane other than the laser beam reflected by the reflecting substance is inhibited from reaching the photodetector.
摘要翻译： 一种具有用于照射激光束的半导体激光二极管的半导体激光装置，形成在半导体衬底上的光电检测器，具有用于将激光束引入反射物质的第一平面的棱镜，并将由反射物质反射的光束引入到光电检测器 以及面对光电检测器的第二平面，以及形成在半导体衬底和棱镜之间的边界上的涂层，其折射率使得从由反射物质反射的激光束以外的第一平面入射的激光束是 禁止到达光电检测器。
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公开(公告)号：US4794588A
公开(公告)日：1988-12-27
申请号：US130302
申请日：1987-12-09
CPC分类号： F16F9/103 , G11B25/043 , G11B33/08
摘要： An optical disk player wherein a chassis having an optical pickup, a disk table and the like mounted thereon is supported by a frame using elastic support means at a plurality of positions, a vessel filled with a viscous fluid and sealed is provided at either the frame or the chassis, and a movable member provided at the other of the two is arranged in the sealed viscous fluid. With this arrangement, the slope of the Q curve in the resonant region is moderate enough to improve the antivibration characteristics, thus substantially eliminating sound omissions.
摘要翻译： 一种光盘播放器，其中安装有光学拾取器，盘台等的机架由多个位置处的弹性支撑装置由框架支撑，填充有粘性流体并密封的容器设置在框架 或底盘，并且设置在两者的另一个上的可动构件设置在密封的粘性流体中。 通过这种布置，共振区域中的Q曲线的斜率足够适中以改善抗振特性，从而基本上消除了遗漏。
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公开(公告)号：US4731777A
公开(公告)日：1988-03-15
申请号：US879129
申请日：1986-06-19
CPC分类号： G11B25/043 , F16F9/103 , G11B17/04 , G11B33/08
摘要： In an optical disk player according to this invention, a movable chassis mounted with an optical pickup, a turntable and the like is supported by springs joined with respective positions of a frame, and in this optical disk player, dampers are inserted between the frame and the movable chassis to absorb the energy of vibrations of the movable chassis. At the same time, a correcting means such as a coiled spring is so arranged as to be capable of changing the biasing force for biasing the movable chassis in a neutral condition with respect to the frame by adjustment operation. With the above arrangement, the slope of Q-value of the resonance region becomes moderate enough at the leading edge of the slope, and thus the vibration isolation characteristic is improved, so that sound omissions tend not to occur. The degradation of the vibration isolation characteristic of the damper that usually occurs on tilt of the chassis is effectively prevented. At the same time, a collision between the frame and the movable chassis can be prevented without increasing the movable range of the movable chassis with respect to the frame.
摘要翻译： PCT No.PCT / JP85 / 00557 Sec。 371日期1986年6月19日第 102（e）日期1986年6月19日PCT提交1985年10月9日PCT公布。 出版物WO86 / 02482 日本公开日1986年04月24日。在根据本发明的光盘播放器中，安装有光学拾取器，转盘等的可移动底盘由与框架的各个位置相连的弹簧支撑，并且在该光盘播放器中， 阻尼器被插入在框架和可移动底盘之间以吸收可移动底盘的振动能量。 同时，诸如螺旋弹簧的校正装置被布置成能够通过调整操作改变用于使可动底盘偏向相对于框架的中立状态的偏置力。 通过上述结构，谐振区域的Q值的斜率在斜坡的前缘变得足够适中，因此提高了隔振特性，从而不会发生泄漏。 有效地防止了通常在底盘倾斜时发生的阻尼器的隔振特性的劣化。 同时，可以防止框架和可移动底盘之间的碰撞，而不增加可移动底盘相对于框架的可移动范围。
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公开(公告)号：US4687296A
公开(公告)日：1987-08-18
申请号：US768056
申请日：1985-08-22
CPC分类号： G11B7/0933 , G11B7/0932
摘要： An optical pickup of the invention has an objective lens holder holding an objective lens, a support shaft which supports the objective lens holder such that the holder is slidable along the axial direction and pivotable about its axis, and a press member for pressing the objective lens holder against the support shaft.
摘要翻译： 本发明的光拾取器具有保持物镜的物镜支架，支撑物镜支架的支撑轴，使支架沿着轴向方向可滑动并绕其轴线转动;以及按压构件，用于按压物镜 支架抵靠支撑轴。
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