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1. 发明专利

JPS6148142A Optical head 失效
标题翻译：光学头
公开(公告)号：JPS6148142A
公开(公告)日：1986-03-08
申请号：JP17001684
申请日：1984-08-16
申请人： Olympus Optical Co Ltd , Pioneer Electronic Corp
发明人： IKEGAME TETSUO , SUGIMOTO YOICHI , ITO KENICHI , TAKEGAWA KEIJI , DOBASHI YASUTAKA , NINOMIYA MASAMI , NAGANO SHINJI , MUSHA TORU , WADA YASUMITSU , KIKUCHI IKUYA , TAKANO TOMOMITSU , SHIMODA KOSHI , EGASHIRA YOSHINORI
IPC分类号： G11B7/09
CPC分类号： G11B7/0932
摘要： PURPOSE:To mass-produce inexpensively stable products while avoiding troublesome bend forming by using completely separate focusing plate and tracking plate springs as a couple and connecting both of them via a relay member. CONSTITUTION:A support mechanism is constituted by a couple of focusing plate springs 4a, 4b, the relay member 5 and a couple of tracking plate springs 6a, 6b. A couple of focusing plate springs 4a, 4b and a couple of tracking plate springs 6a, 6b are constituted by having only to cut plate springs at a proper length, and since no bending forming required for a conventional head is necessary, the manufacture is easy. A couple of focusing coils 9a, 9b are fixed to a side face opposing to the tracking direction T of the support member 2 and a couple of tracking coils 10a, 10b are mounted incorporatedly to the outside of the focusing coils.
摘要翻译：目的：通过使用完全分离的聚焦板和跟踪板簧作为一对并通过中继构件连接它们，大量生产廉价稳定的产品，同时避免麻烦的弯曲成形。构成：支撑机构由一对聚焦板簧4a，4b，中继构件5和一对跟踪板弹簧6a，6b构成。一对聚焦板弹簧4a，4b和一对跟踪板弹簧6a，6b仅通过切割适当长度的板簧构成，并且由于不需要传统头部所需的弯曲成形，所以制造容易。一对聚焦线圈9a，9b固定到与支撑构件2的跟踪方向T相对的侧面，并且一对跟踪线圈10a，10b被组合地安装到聚焦线圈的外侧。

2. 发明专利

JPS5753833A Optical information reader 失效
标题翻译：空值
公开(公告)号：JPS5753833A
公开(公告)日：1982-03-31
申请号：JP12772880
申请日：1980-09-13
申请人： Olympus Optical Co Ltd
发明人： KATO KIICHI , ITO KENICHI , MUSHA TOORU
IPC分类号： G02B7/28 , G11B7/09
摘要： PURPOSE:To detect an error signal with high sensitivity and by a 3-beam system, by focusing reflected light flux only in the prescribed direction through a prism set at the critical angle plus a column lens and detecting the distribution of light volume. CONSTITUTION:The laser beam sent from a laser beam source 21 is divided into three beams by a diffraction grating 23, and the reflected light flux is focused only in the direction perpendicular to the incident angle through a detecting prism 31 having a reflective surface 32 set at the critical angle to the parallel reflected light flux plus a convex column lens 33 to be received by a photodetector 34. Light receiving regions 34A1 and 34A2 for the focus plus light receiving regions 34B and 34C for tracking are provided to the detector 34 that detects the distribution of light volume. Both the focal error signal and the tracking error signal are obtained from the quantity and polarity of the outputs of those light receiving regions. Thus the prescribed servo control is carried out. In such way, the signal can be detected with high sensitivity by preventing the mixture equivalent to the fluctuation component with use of a 3-beam system.
摘要翻译：目的：为了检测高灵敏度的误差信号和3光束系统，通过仅通过设置在临界角的棱镜加上柱透镜的方向将反射光束聚焦在规定的方向，并检测光体积的分布。构成：从激光束源21送来的激光束被衍射光栅23分成三束，反射光束仅通过具有反射面32的检测棱镜31在与入射角垂直的方向上聚焦与平行的反射光通量的临界角加上由光电检测器34接收的凸柱透镜33.用于焦点的受光区域34A1和34A2以及用于跟踪的光接收区域34B和34C被提供给检测器34，检测器34检测光量分布。焦点误差信号和跟踪误差信号都是从这些光接收区域的输出的数量和极性获得的。因此，执行规定的伺服控制。以这种方式，通过使用三光束系统防止与波动分量相当的混合物，可以高灵敏度地检测信号。

3. 发明专利

JPS61139947A Optical head 失效
标题翻译：光学头
公开(公告)号：JPS61139947A
公开(公告)日：1986-06-27
申请号：JP26007584
申请日：1984-12-11
申请人： Olympus Optical Co Ltd
发明人： MUSHA TORU , SUGIMOTO YOICHI , KOBAYASHI SHIYOUHEI , ITO KENICHI , IKEGAME TETSUO , ISHIKAWA KAZUMASA , SHIMIZU NORIO , KOMINO TETSUO , NINOMIYA MASAMI
IPC分类号： G02B26/10 , G11B7/09
CPC分类号： G11B7/093 , G11B7/0932
摘要： PURPOSE:To bring stably an objective lens to a driving control in the focusing direction and the tracking direction by constituting a focusing mechanism which is placed symmetrically on a plane containing a lens optical axis and a track direction, of a flat coil and a magnet. CONSTITUTION:A current flows to focusing F use coils 30a, 30b, and by this current and a magnetic field of magnets 32a, 32b, an objective lens 21 supported by F use springs 24a, 24b is displaced in the F direction. In this case, a repeating member 25 also receives a force of the F direction, but tracking T use springs 26a, 26b are parallel to the F direction and the member 25 is not displaced, and the lens 21 is driven exactly. T use coils 35a, 35b are brought to an electric conduction, and by a magnetic field of magnets 36a, 36b, the lens 21 supported by the T use springs 26a, 26b is displaced in the T direction. In this case, a pair of T use springs 26a, 26b are opposed to each other at an angle alpha, therefore, the F use springs 24a, 24b are not deformed, and the lens 21 is driven exactly. Accordingly, the objective lens can be brought to a driving control stably in the focusing direction and the tracking direction.
摘要翻译：目的：通过构成对称地放置在包含透镜光轴和轨道方向的平面的平面线圈和磁体上的聚焦机构，将物镜稳定地朝向聚焦方向和跟踪方向的驱动控制。构成：电流流向聚焦F使用线圈30a，30b，并且通过该电流和磁体32a，32b的磁场，F支撑的物镜21使用弹簧24a，24b在F方向上移位。在这种情况下，重复构件25也接受F方向的力，但是跟踪T使用弹簧26a，26b平行于F方向，并且构件25不移动，并且透镜21被精确地驱动。 T使用线圈35a，35b被导通，并且通过磁体36a，36b的磁场，由T使用弹簧26a，26b支撑的透镜21在T方向上移位。在这种情况下，一对T使用弹簧26a，26b以α角相互对置，因此，F使用弹簧24a，24b不变形，镜头21被精确地驱动。因此，物镜可以在聚焦方向和跟踪方向上稳定地进行驱动控制。

4. 发明专利

JPS6163932A Out-of-focus detector for optical disk device 失效
标题翻译：用于光盘设备的聚焦探测器
公开(公告)号：JPS6163932A
公开(公告)日：1986-04-02
申请号：JP18528584
申请日：1984-09-06
申请人： Olympus Optical Co Ltd
发明人： ISHIKAWA KAZUMASA , ITO KENICHI , SUGIMOTO YOICHI
IPC分类号： G02B7/28 , G11B7/09
CPC分类号： G11B7/0908
摘要： PURPOSE:To improve the accuracy of out-of-focus detection by deleting the vibration component due to a pit pattern of a disk contained in the fluctuation component of the modulated light produced by an optical disk. CONSTITUTION:Peak holding circuits 11 and 12 detect the peak levels of outputs (a+b) and (c+d) of adders 2 and 3 which contain the vibration component due to a pit pattern. Then peak level signal (e) and (f), i.e., the outputs of both circuits 11 and 12 are supplied to a subtractor 4. Both outputs (e) and (f) are turned into the signals having only the peak levels of the outputs of both adders 2 and 3. Thus the vibration component due to the pit pattern is deleted.
摘要翻译：目的：通过删除由光盘产生的调制光的波动分量中包含的盘的凹坑图案引起的振动分量来提高失焦检测的精度。构成：峰值保持电路11和12检测由于凹坑图案而包含振动分量的加法器2和3的输出（a + b）和（c + d）的峰值电平。然后，峰值电平信号（e）和（f），即两个电路11和12的输出被提供给减法器4.输出（e）和（f）都被转换成仅具有两个加法器2和3的输出。因此，由凹坑图形引起的振动分量被删除。

5. 发明专利

JPS5753832A Method and device for recording of optical information 失效
标题翻译：空值
公开(公告)号：JPS5753832A
公开(公告)日：1982-03-31
申请号：JP12696580
申请日：1980-09-12
申请人： Olympus Optical Co Ltd
发明人： MUSHA TOORU , KATO KIICHI , ITO KENICHI
IPC分类号： G02B7/28 , G11B7/09 , G11B7/12 , G11B7/125 , G11B7/135 , G11B11/105
CPC分类号： G11B7/0917 , G11B7/0903 , G11B7/0941 , G11B7/12 , G11B7/1359 , G11B11/10506 , G11B11/10536 , G11B11/10576 , G11B2007/0919
摘要： PURPOSE: To realize the servo control with higher sensitivity with use of a small- sized device, by separating two light beams into the main and secondary beams through a detecting prism set at a critical angle and then obtaining an error signal between the focus and tracking.
CONSTITUTION: The beams sent from light emitting points A and B of a laser beam source 1 are defined as a recording main beam and a tracking secondary beam and focused on a recording surface via a polarizing prism 3, and the reflected light is made incident to a detecting prism 8. The reflective surface of the prism 8 is set at the critical angle to the main beam. Thus the main beam is reflected, and the light volume distribution is detected by a photodetector 10 via a differential amplifier 11 to obtain a focal error signal. On the other hand, the secondary beam passes through the prism 8 owing to its incident angle and is detected by a photodetector 15 to be turned into a tracking signal. Thus the prescribed servo control is performed. As a result, the servo control is possible with higher sensitivity by increasing the sensitivity with use of the critical angle and a small-sized device and by avoiding the mixture equivalent to the fluctuation with use of two beams.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过使用小型设备实现更高灵敏度的伺服控制，通过将临近角度设置的检测棱镜将两束光束分离成主光束和次光束，然后在焦点和跟踪之间获得误差信号。构成：将从激光光源1的发光点A和B发送的光束定义为记录主光束和跟踪次光束，并通过偏振棱镜3聚焦在记录表面上，并将反射光入射到棱镜8的反射面被设定成与主光束成临界角。因此，主光束被反射，并且光量分布由光电检测器10经由差分放大器11检测以获得焦点误差信号。另一方面，次级光束由于其入射角而通过棱镜8，并且被光电检测器15检测为变成跟踪信号。因此，执行规定的伺服控制。结果，通过使用临界角增加灵敏度和小尺寸的装置，并且通过使用两个梁避免与波动相当的混合，可以提高灵敏度的伺服控制。

6. 发明专利

JPS5753831A Method and device for reproduction of optical information 失效
标题翻译：空值
公开(公告)号：JPS5753831A
公开(公告)日：1982-03-31
申请号：JP12696480
申请日：1980-09-12
申请人： Olympus Optical Co Ltd
发明人： MUSHA TOORU , KATO KIICHI , ITO KENICHI
IPC分类号： G02B7/28 , G11B7/08 , G11B7/09 , G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B11/10515 , G11B7/08 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/12 , G11B7/1359 , G11B7/1381 , G11B11/10543 , G11B11/10576 , G11B2007/0919
摘要： PURPOSE: To realize an accurate in-focus state, by projecting at least two light beams on each prescribed track, making incident these beams to an optical member having a prescribed reflective surface and separating them to obtain an information signal and a focal error signal.
CONSTITUTION: The main and secondary beams of a laser beam source 1 are turned into the parallel light flux through a collimator lens 2 to be made incident to an objective lens 5 via a 1/4 wavelength plate 4 after thoroughly reflected on the polarizing surface of a polarizing prism 3. Each of the beams radiated from the lens 5 is focused on a recording surface 7 of a disk 6. Both light fluxes reflected on the surface 7 pass through the plate 4, etc. and are made incident to a detecting prism 8 with the polarizing direction converted by 90° in comparison with the direction when they are made incident. Reflective surfaces 9-1 and 9-2 of the prism 8 are set to be critical angles to the incident angle of the optical axis of the main beam, respectively. Thus the variation detects the light volume distribution of the main beam to obtain a focal error signal and to obtain an information signal via an adder 12. At the same time, the focus can be detected with high sensitivity. In such constitution, an accurate in-focus state can be attained.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：为了实现准确的对焦状态，通过在每个规定的轨道上投射至少两个光束，使这些光束入射到具有规定反射面的光学部件，并将其分离以获得信息信号和焦点误差信号。构成：激光束源1的主光束和次光束通过准直透镜2转换为平行光束，以在通过1/4波长板4入射到物镜5之后，在经偏光面偏振棱镜3.从透镜5辐射的每个光束被聚焦在盘6的记录表面7.反射在表面7上的两个光束都穿过板4等，并被入射到检测棱镜 8，偏振方向转换90度。与事件发生的方向相比较。棱镜8的反射面9-1和9-2分别被设定为与主光束的光轴的入射角的临界角。因此，该变化检测主光束的光量分布以获得焦点误差信号，并且经由加法器12获得信息信号。同时，可以以高灵敏度检测焦点。在这种结构中，可以获得准确的聚焦状态。

7. 发明专利

JPS6190337A Optical information recording/reproducing device 失效
标题翻译：光信息记录/再现设备
公开(公告)号：JPS6190337A
公开(公告)日：1986-05-08
申请号：JP21034684
申请日：1984-10-09
申请人： Olympus Optical Co Ltd
发明人： NAGANO SHINJI , DOBASHI YASUTAKA , TAKEGAWA KEIJI , ITO KENICHI , IKEGAME TETSUO
IPC分类号： G02B7/28 , G11B7/09 , G11B7/135 , G02B7/11
摘要： PURPOSE:To detect an accurate error signal without being influenced by an astigmatism by attaching a lens so that the focus direction of astigmatism of the objective lens and the direction of split line of a photodetector may coincide. CONSTITUTION:When an objective lens 6 is attached to the actuator, the lens is attached so that the focus direction of the lens may coincide with X axis or Y axis of the split line of a photodetector. If the lens is attached in this way, the variation of light distribution which may occur to bit refraction pattern projected on the optical detector 9 due to an astigmatism will be symmetrical against the split line, so the difference factor is not infused into the error signal. Therefore, the influence of the astigmatism of lens will be eliminated and error signals can be accurately detected enabling correct follow-up.
摘要翻译：目的：通过附加透镜来检测准确的误差信号而不受像散影响，使得物镜的散光的聚焦方向和光电检测器的分割线的方向可以一致。构成：当将物镜6安装在致动器上时，透镜被安装成使得透镜的聚焦方向与光电检测器的分割线的X轴或Y轴重合。如果以这种方式附接透镜，则由于散光而投影在光学检测器9上的位折射图案可能发生的光分布的变化将相对于分割线对称，因此差分因子不会输入到误差信号中。因此，可以消除透镜散光的影响，可以准确检测误差信号，从而能够进行正确的跟踪。

8. 发明专利

JPS5753834A Optical information reader 失效
标题翻译：空值
公开(公告)号：JPS5753834A
公开(公告)日：1982-03-31
申请号：JP12772980
申请日：1980-09-13
申请人： Olympus Optical Co Ltd
发明人： ITO KENICHI , MUSHA TOORU , KATO KIICHI
IPC分类号： G02B7/28 , G11B7/09
CPC分类号： G11B7/0908
摘要： PURPOSE:To detect a focal error signal with high sensitivity and at the same time to increase the degree of freedom for designing, by producing the light volume distribution asymmetrical to the optical axis in reflected light flux through a detecting prism set at the critical angle and then detecting the light volume distribution. CONSTITUTION:A reflective prism 27 is provided above a polarizing prism 23, and the reflective surface 27A is set nearly at the critical angle to incident light flux. As a result, the reflected light is reflected on the surface 27A to reach photodetectors 28A and 28B, and a part of the light transmits through the reflective surface. In an in-focus state, the light is made incident equally to the detectors 28A and 28B with no difference caused to the outputs, respectively. However, the asymmetrical distribution of light volume are caused if a disk 26 is displaced up and down. Thus a focal error signal can be obtained from the quantity and polarity of the detected outputs of the detectors 28A and 28B. In such way, the degree of freedom can be increased for designing by increasing the sensitivity with use of the critical angle and also by adaption of 3-beam system.
摘要翻译：目的：为了检测高灵敏度的焦点误差信号，同时增加设计自由度，通过在临界角设置的检测棱镜产生反射光通量对光轴不对称的光体积分布，然后检测光量分布。构成：反射棱镜27设置在偏振棱镜23的上方，反射面27A被设定为与入射光束几乎成临界角。结果，反射光在表面27A上被反射到达光电检测器28A和28B，并且一部分光透过反射表面。在对焦状态下，光分别对检测器28A和28B入射，分别与输出不同。然而，如果盘26上下移动，则会导致光量的不对称分布。因此，可以从检测器28A和28B的检测输出的数量和极性获得焦点误差信号。以这种方式，通过使用临界角增加灵敏度以及通过三光束系统的适应，可以增加设计自由度。

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