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    • 1. 发明申请
    • Detection device
    • 检测装置
    • US20060265147A1
    • 2006-11-23
    • US11405450
    • 2006-04-18
    • Atsushi YamaguchiYoshihisa SuzukiMasato YamadaShuichi Ichiura
    • Atsushi YamaguchiYoshihisa SuzukiMasato YamadaShuichi Ichiura
    • G06F19/00
    • G01S7/481G01S7/497G01S17/936
    • 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.
    • 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。
    • 2. 发明授权
    • Detection device
    • 检测装置
    • US07570346B2
    • 2009-08-04
    • US11377449
    • 2006-03-17
    • Atsushi YamaguchiShinji KobayashiMasato YamadaShuichi Ichiura
    • Atsushi YamaguchiShinji KobayashiMasato YamadaShuichi Ichiura
    • G01C3/08
    • G01S17/936G01C3/08G01S17/46
    • 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 and monitoring are performed at the time of: changing of the driving direction, the high-speed driving, and the detection of the obstacle.
    • 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。 在改变驾驶方向,高速驾驶和障碍物的检测时进行检测和监视。
    • 4. 发明申请
    • Detection device
    • 检测装置
    • US20060244978A1
    • 2006-11-02
    • US11410049
    • 2006-04-25
    • Masato YamadaShuichi Ichiura
    • Masato YamadaShuichi Ichiura
    • G01B11/14
    • G01S17/936G01S7/481G01S7/4972
    • An irradiation pattern of a laser beam within a target region 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, an irradiation pattern for increasing irradiation 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, an irradiation pattern for increasing irradiation frequency on a center portion of a forward region in the driving direction is set. When the obstacle is detected and a distance to the obstacle is shorter than a threshold distance, an irradiation pattern for increasing irradiation 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.
    • 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有关的信号来控制目标区域内的激光束的照射图案。 例如,在右转时,设定用于增加沿着驱动方向的中心轴在右转方向上偏移的部分上的照射频率的照射图案。 在高速驱动时,设定用于在驱动方向的前方区域的中心部分增加照射频率的照射图案。 当检测到障碍物并且与障碍物的距离小于阈值距离时,设置用于增加障碍物附近的照射频率的照射模式。 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能够充分而平稳地进行。
    • 5. 发明授权
    • Optical head for two different disk thicknesses with a light beam diameter control device
    • 具有光束直径控制装置的两个不同光盘厚度的光头
    • US06552990B1
    • 2003-04-22
    • US09180301
    • 1998-11-05
    • Seiji KajiyamaYoichi TsuchiyaMasato YamadaYasuyuki KanouShuichi Ichiura
    • Seiji KajiyamaYoichi TsuchiyaMasato YamadaYasuyuki KanouShuichi Ichiura
    • G11B700
    • G11B7/1353G11B7/08582G11B7/123G11B7/127G11B7/1362G11B7/1367G11B7/139G11B2007/0006G11B2007/13727
    • An optical pickup device which includes a semiconductor laser selectively generating a laser beam with a wavelength of 635 nm, a laser beam with a wavelength of 780 nm, and an optical device having a central region in which a hologram is formed and a peripheral region in which a diffraction grating is formed. In particular, the optical device is arranged immediately below an objective lens, and the central region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction but increases the diameter of the teaser beam to the wavelength of 780 nm by diffraction. On the other hand, peripheral region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction, but substantially shields the laser beam with the wavelength of 780 nm by diffraction. Thus, each laser beam with the wavelength 635 nm is transmitted through objective lens and focused on a signal recording surface of a DVD. The periphery of the laser beam with the wavelength of 780 nm is significantly diffracted by peripheral region of optical device and only the central portion of the laser beam enters objective lens while increasing its diameter. Thus, the laser beam with the wavelength of 780 nm is focused on a signal recording surface of a CD-R or a CD-ROM. Therefore, the optical pickup device is capable of compatibly reproducing the DVD, CD-R and CD-ROM.
    • 一种光拾取装置,包括选择性地产生波长为635nm的激光束的半导体激光器,波长为780nm的激光束,以及具有形成全息图的中心区域的光学元件和周边区域 形成衍射光栅。 特别地,光学装置被布置在物镜的正下方,并且中心区域允许透射具有635nm波长的激光束而没有任何衍射,但是通过衍射将前导光束的直径增加到780nm的波长。 另一方面,外围区域允许透射波长为635nm的激光束而没有衍射,但是通过衍射基本上屏蔽了波长为780nm的激光束。 因此,波长为635nm的每个激光束通过物镜透射并聚焦在DVD的信号记录表面上。 波长为780nm的激光束的周围被光学器件的周边区域显着地衍射,并且只有激光束的中心部分在增加其直径的同时进入物镜。 因此,将波长为780nm的激光束聚焦在CD-R或CD-ROM的信号记录面上。 因此,光学拾取装置能够兼容地再现DVD,CD-R和CD-ROM。
    • 6. 发明授权
    • Detection device for detecting conditions at a target position
    • 用于检测目标位置的状况的检测装置
    • US07605909B2
    • 2009-10-20
    • US11405450
    • 2006-04-18
    • Atsushi YamaguchiYoshihisa SuzukiMasato YamadaShuichi Ichiura
    • Atsushi YamaguchiYoshihisa SuzukiMasato YamadaShuichi Ichiura
    • G01C3/08
    • G01S7/481G01S7/497G01S17/936
    • 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.
    • 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。
    • 9. 发明申请
    • Detection device
    • 检测装置
    • US20060215148A1
    • 2006-09-28
    • US11377449
    • 2006-03-17
    • Atsushi YamaguchiShinji KobayashiMasato YamadaShuichi Ichiura
    • Atsushi YamaguchiShinji KobayashiMasato YamadaShuichi Ichiura
    • G01C3/08G01P3/36
    • G01S17/936G01C3/08G01S17/46
    • 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.
    • 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。
    • 10. 发明授权
    • Optical pickup device and wavelength selective diffraction grating
    • 光学拾取装置和波长选择性衍射光栅
    • US06181668B2
    • 2001-01-30
    • US09125987
    • 1998-08-28
    • Seiji KajiyamaYasuyuki KanouMasato YamadaYoichi TsuchiyaShuichi Ichiura
    • Seiji KajiyamaYasuyuki KanouMasato YamadaYoichi TsuchiyaShuichi Ichiura
    • G11B712
    • G11B7/1369G02B5/1828G11B7/0943G11B7/1275G11B7/131G11B7/1353G11B7/1372G11B2007/0006G11B2007/13727
    • 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.
    • 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。