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    Detection device
    1.
    发明申请
    Detection device 失效
    检测装置

    公开(公告)号：US20060265147A1

    公开(公告)日：2006-11-23

    申请号：US11405450

    申请日：2006-04-18

    申请人： Atsushi Yamaguchi ,  Yoshihisa Suzuki ,  Masato Yamada ,  Shuichi Ichiura

    发明人： Atsushi Yamaguchi ,  Yoshihisa Suzuki ,  Masato Yamada ,  Shuichi Ichiura

    IPC分类号： G06F19/00

    CPC分类号： G01S7/481 ,  G01S7/497 ,  G01S17/936

    摘要： An object of the present invention is to provide a detection device which does not cause the false detection by receiving laser light from an oncoming car. The pulse laser light modulated with a modulation pattern set every target position is irradiated at the target position from a laser irradiation portion. DSP (Digital Signal Processor) decides that there is an obstacle at the target position only when the modulation pattern of the pulse laser light emitted from the laser emitting portion matches with the modulation pattern of the pulse laser light received by the laser receiving portion. It is suppressed that the detection device misdetects the conditions of the target position when receiving laser light from an oncoming car or the like because modulation pattern of laser light from own does not match with modulation pattern of laser light from the oncoming car or the like.

    摘要翻译： 本发明的目的是提供一种通过接收来自迎面而来的轿厢的激光不会引起错误检测的检测装置。 以每个目标位置设定的调制图案调制的脉冲激光在激光照射部分的目标位置被照射。 只有当从激光发射部分发射的脉冲激光的调制图案与由激光接收部分接收的脉冲激光的调制图案匹配时，DSP（数字信号处理器）才确定目标位置处存在障碍物。 抑制了当从迎面而来的轿厢等接收激光时检测装置误检目标位置的状况，因为来自其的激光的调制图案与迎面而来的轿厢等的激光的调制图案不匹配。

    Optical Pickup Apparatus and Disc Apparatus Including the Same
    3.
    发明申请
    Optical Pickup Apparatus and Disc Apparatus Including the Same 失效
    包括其的光学拾取装置和光盘装置

    公开(公告)号：US20120182850A1

    公开(公告)日：2012-07-19

    申请号：US13095624

    申请日：2011-04-27

    申请人： Minoru Sato ,  Kiyotaka Eizumi ,  Shuichi Ichiura

    发明人： Minoru Sato ,  Kiyotaka Eizumi ,  Shuichi Ichiura

    IPC分类号： G11B7/1353 ,  G11B7/12

    CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/1275 ,  G11B2007/0006

    摘要： An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to split the first wavelength light into at least a first main beam and a first sub-beam and to split the second wavelength light into at least a second main beam and a second sub-beam, a following expression (1) being satisfied: 1.05

    摘要翻译： 光拾取装置至少包括：能够发射至少第一波长光和第二波长光的发光元件; 以及衍射光栅，其被配置为将所述第一波长光分成至少第一主光束和第一子光束，并将所述第二波长光分裂成至少第二主光束和第二子光束，所述表达式（1 ）满足：1.05

    Detection device controlled by driving speed and driving direction
    4.
    发明授权
    Detection device controlled by driving speed and driving direction 失效
    检测装置由驱动速度和行驶方向控制

    公开(公告)号：US07566861B2

    公开(公告)日：2009-07-28

    申请号：US11410049

    申请日：2006-04-25

    申请人： Masato Yamada ,  Shuichi Ichiura

    发明人： Masato Yamada ,  Shuichi Ichiura

    IPC分类号： G06M7/00 ,  B60Q1/00 ,  B62D1/24 ,  G01C3/08

    CPC分类号： G01S17/936 ,  G01S7/481 ,  G01S7/4972

    摘要： A detection device detects an obstacle within a target region by setting the target region, setting a scan trajectory, and setting a pattern of an irradiation position of a laser beam within the target region based on a signal related to a moving state of the detection device or a moving object on which the detection device is mounted.

    摘要翻译： 检测装置基于与检测装置的移动状态相关的信号，通过设定目标区域，设定扫描轨迹以及将目标区域内的激光束的照射位置的图案设定在目标区域内来检测目标区域内的障碍物 或安装检测装置的移动物体。

    Detection device
    5.
    发明申请
    Detection device 失效
    检测装置

    公开(公告)号：US20060215148A1

    公开(公告)日：2006-09-28

    申请号：US11377449

    申请日：2006-03-17

    申请人： Atsushi Yamaguchi ,  Shinji Kobayashi ,  Masato Yamada ,  Shuichi Ichiura

    发明人： Atsushi Yamaguchi ,  Shinji Kobayashi ,  Masato Yamada ,  Shuichi Ichiura

    IPC分类号： G01C3/08 ,  G01P3/36

    CPC分类号： G01S17/936 ,  G01C3/08 ,  G01S17/46

    摘要： A scan trajectory of a laser beam is controlled based on external signals each related to a driving direction and a driving speed, a result obtained by detection of an obstacle, and signals related to distances to the obstacle. For example, at the time of a right turn, a scan trajectory for increasing scan frequency on a portion shifted in a right-turn direction from a center axis in a driving direction is set. At the time of high-speed driving, a scan trajectory for increasing scan frequency on a center portion in the driving direction is set. When the obstacle is detected at a position corresponding to a distance shorter than a threshold distance, a scan trajectory for increasing scan frequency in the vicinity of the obstacle is set. Detection of the obstacle and monitoring of a state thereof are adequately and smoothly performed at the time of changing of the driving direction, the time of high-speed driving, and the time of detection of the obstacle.

    摘要翻译： 基于与驱动方向和驱动速度相关的外部信号，通过检测障碍物获得的结果以及与障碍物的距离相关的信号来控制激光束的扫描轨迹。 例如，在右转时，设定用于增加扫描频率的扫描轨迹，该扫描轨迹用于沿着驱动方向从中心轴沿右转方向移动的部分增加扫描频率。 在高速驱动时，设定用于增加驱动方向上的中心部分的扫描频率的扫描轨迹。 当在对应于比阈值距离短的距离的位置处检测到障碍物时，设置用于增加障碍物附近的扫描频率的扫描轨迹。 在改变行驶方向，高速行驶时间和障碍物的检测时间时，对障碍物的检测和状态的监视充分而平稳地进行。

    Optical disk device
    6.
    发明授权
    Optical disk device 有权
    光盘装置

    公开(公告)号：US06466527B1

    公开(公告)日：2002-10-15

    申请号：US10076556

    申请日：2002-02-19

    申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

    发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

    IPC分类号： G11B700

    CPC分类号： G11B7/08511 ,  G11B7/1376 ,  G11B2007/0013

    摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

    摘要翻译： 为了从具有两个信号记录表面的双层光盘再现信号，需要快速实现从一个信号记录表面到另一个信号记录表面的物镜的聚焦的聚焦跳跃。 当来自拾取器（60,70）的聚焦误差信号（FE）达到预定阈值（Vcomp）时，用于减速物镜（42）的减速信号被提供给致动器（47）。 优选地，减速脉冲电压逐步降低。 根据通过微分聚焦误差信号（FE）产生的差分聚焦误差信号（DFE）的最大值（DFEmax）来确定减速脉冲电压。 优选地，寻址与焦点跳跃同时完成。 按照预先测量的层间距离执行聚焦跳转。 通过使用具有可控焦距的透镜（143）来进行聚焦跳跃。 优选地，基于反射的光功率来判断层是第一层还是第二层。 如果即使在聚焦跳跃开始之后经过一定时间，也不能获得来自另一层的聚焦误差信号（FE），则物镜42沿相反方向移动。

    Optical pickup device and wavelength selective diffraction grating
    7.
    发明授权
    Optical pickup device and wavelength selective diffraction grating 失效
    光学拾取装置和波长选择性衍射光栅

    公开(公告)号：US06181668B2

    公开(公告)日：2001-01-30

    申请号：US09125987

    申请日：1998-08-28

    申请人： Seiji Kajiyama ,  Yasuyuki Kanou ,  Masato Yamada ,  Yoichi Tsuchiya ,  Shuichi Ichiura

    发明人： Seiji Kajiyama ,  Yasuyuki Kanou ,  Masato Yamada ,  Yoichi Tsuchiya ,  Shuichi Ichiura

    IPC分类号： G11B712

    CPC分类号： G11B7/1369 ,  G02B5/1828 ,  G11B7/0943 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： The optical pickup device includes a two wavelength semiconductor laser (23) selectively generating a laser beam having the wavelength of 635 nm and laser beam having the wavelength of 780 nm, a collimator lens (24), a hologram (25) formed on a surface of collimator lens (24), a polarizing glass (22) having an annular polarizing region (40) and an objective lens (21). Hologram (25) does not diffract the laser beam having the wavelength of 635 nm, and diffracts outward the laser beam having the wavelength of 780 nm. Therefore, virtual light source of the laser beam having the wavelength of 780 nm comes closer to the collimator lens (24) than the light source of the laser beam having the wavelength of 635 nm. Therefore, objective lens (21) focuses the laser beam having the wavelength of 635 nm on a recording surface of a transparent substrate (31) of a DVD, and focuses the laser beam having the wavelength of 780 nm on a recording surface of a transparent substrate (32) of a CD-R. Accordingly, the optical pickup device is capable of reproducing both DVD and CD-R having transparent substrates of different thicknesses.

    摘要翻译： 光拾取装置包括选择性地产生波长为635nm的激光束和波长为780nm的激光束的双波长半导体激光器（23），准直透镜（24），形成在表面上的全息图（25） 准直透镜（24），具有环形偏振片（40）和物镜（21）的偏光玻璃（22）。 全息图（25）不会衍射具有635nm波长的激光束，并向外衍射具有780nm波长的激光束。 因此，具有波长为780nm的激光束的虚拟光源比具有635nm波长的激光束的光源更靠近准直透镜（24）。 因此，物镜（21）将具有635nm波长的激光束聚焦在DVD的透明基板（31）的记录表面上，并将具有780nm波长的激光束聚焦在透明的记录表面上 CD-R的底物（32）。 因此，光学拾取装置能够再现具有不同厚度的透明衬底的DVD和CD-R。

    Ultra-resolving optical pickup device having an optical detector receiving an unfiltered reflected beam
    9.
    发明授权
    Ultra-resolving optical pickup device having an optical detector receiving an unfiltered reflected beam 失效
    具有接收未经滤波的反射光束的光学检测器的超分辨率光学拾取装置

    公开(公告)号：US5708635A

    公开(公告)日：1998-01-13

    申请号：US665492

    申请日：1996-06-18

    申请人： Shuichi Ichiura ,  Osamu Ota

    发明人： Shuichi Ichiura ,  Osamu Ota

    IPC分类号： G02B27/58 ,  G11B7/09 ,  G11B7/135 ,  G11B7/095

    CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1398 ,  G11B7/0909

    摘要： An optical pickup device provides ultraresolving prism between a semiconductor laser and an objective lens so as to reduce light intensity at around a cross sectional center of a laser beam, thereby generating ultraresolution thereon. An optical detector is disposed at a signal detecting position where the laser beam reflected by an optical disk is converged. The optical detector has a detecting element for receiving a main lobe and a pair of detecting elements for receiving a pair of side lobes. A peak of a shielding portion of the prism is inclined to a track center of the optical disk so that the side lobes are oppositely shifted from the track center. Thus, tracking error signals are obtained on the basis of detected signals in the side lobes.

    摘要翻译： 光学拾取装置在半导体激光器和物镜之间提供超分辨棱镜，以便减少激光束横截面中心周围的光强度，从而在其上产生超分辨率。 光检测器设置在由光盘反射的激光束会聚的信号检测位置处。 光检测器具有用于接收主瓣的检测元件和用于接收一对旁瓣的一对检测元件。 棱镜的屏蔽部分的峰值倾斜于光盘的轨道中心，使得旁瓣从轨道中心相对移位。 因此，基于旁瓣中的检测信号获得跟踪误差信号。