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1. 发明授权

US5687164A Decoder employing viterbi decoding method for decoding coded multi-valued signal 失效
标题翻译：解码器采用维特比解码方法对多值信号进行解码
公开(公告)号：US5687164A
公开(公告)日：1997-11-11
申请号：US492989
申请日：1995-06-21
申请人： Kohji Takahashi , Tadashi Nakamura , Kenichi Oide
发明人： Kohji Takahashi , Tadashi Nakamura , Kenichi Oide
IPC分类号： H04L27/00 , H03M13/23 , H03M13/41 , H04L25/08 , H04L27/38 , H04L1/00 , H03M13/00 , H04L27/34
CPC分类号： H03M13/6502 , H03M13/3961 , H03M13/41 , H03M13/4107
摘要： A Viterbi decoder decodes a received signal having Ich and Qch components obtained by modulating a convolutional coded multi-valued QAM signal. The Viterbi decoder includes a first unit which inputs the received signal having the Ich and Qch components, a second unit which finds Euclidean distance between a predetermined signal point, which is one of a plurality of predetermined signal points allocated on a plane formed of Ich and Qch axes orthogonally crossed, and a signal point of the received signal, and a third unit which performs a Viterbi decoding based on the Euclidean distance obtained by the second unit.
摘要翻译：维特比解码器对通过调制卷积编码多值QAM信号而获得的具有Ich和Qch分量的接收信号进行解码。维特比解码器包括输入具有Ich和Qch分量的接收信号的第一单元，第二单元，其在预定信号点之间找到欧几里德距离，预定信号点是分配在由Ich形成的平面上的多个预定信号点中的一个，正交交叉的Qch轴和接收信号的信号点，以及第三单元，其基于由第二单元获得的欧几里得距离执行维特比解码。

2. 发明授权

US11520019B2 Light signal detection device, range finding device, and detection method 有权
公开(公告)号：US11520019B2
公开(公告)日：2022-12-06
申请号：US16818154
申请日：2020-03-13
申请人： Kazuma Matsuura , Yuuta Yoshino , Takefumi Takizawa , Soichiro Yokota , Jun Kishiwada , Hiroyoshi Sekiguchi , Tadashi Nakamura
发明人： Kazuma Matsuura , Yuuta Yoshino , Takefumi Takizawa , Soichiro Yokota , Jun Kishiwada , Hiroyoshi Sekiguchi , Tadashi Nakamura
IPC分类号： G01S7/4861 , G01S7/481 , G01S7/4865
摘要： A light signal detection device includes a light receiving optical system configured to receive a reflection signal reflected from an object when irradiation light emitted from an irradiation unit hits the object and reflects from the object; and circuitry configured to binarize the received reflection signal using a first threshold value, based on a determination of whether the reflection signal is equal to or greater than the first threshold value; binarize the received reflection signal using a second threshold value set with a given value similar to a noise signal value, based on a determination of whether the reflection signal is equal to or greater than the second threshold value; and measure a time difference between a time of emitting the irradiation light from the irradiation unit and a time of receiving a reflection signal equal to or greater than the first threshold value or the second threshold value.

3. 发明授权

US10591602B2 Object detector and sensor 有权
公开(公告)号：US10591602B2
公开(公告)日：2020-03-17
申请号：US16384629
申请日：2019-04-15
申请人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
发明人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
IPC分类号： G01S17/42 , G01S7/486 , H05B37/02 , G01S17/93 , G01S7/481 , G01S7/484 , G01S7/51
摘要： An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.

4. 发明申请

US20180284270A1 OBJECT DETECTING APPARATUS 审中-公开
公开(公告)号：US20180284270A1
公开(公告)日：2018-10-04
申请号：US16001710
申请日：2018-06-06
申请人： Kohji Sakai , Tadashi Nakamura
发明人： Kohji Sakai , Tadashi Nakamura
IPC分类号： G01S17/02 , G08G1/16 , G06K9/20 , G01S7/484 , G01S7/481 , G01S17/93 , G01S17/58 , G01S17/42 , G06K9/00
CPC分类号： G01S17/026 , G01S7/4815 , G01S7/4816 , G01S7/4817 , G01S7/484 , G01S17/42 , G01S17/58 , G01S17/936 , G06K9/00805 , G06K9/2036 , G08G1/165 , G08G1/166
摘要： An object detecting apparatus includes: a light projection unit that is an array light source in which each of a plurality of light emission areas emits light, an optical scanning unit that performs scanning with the light, which is emitted from the light projection unit, in a first direction, and a light receiving unit that receives reflected light which is the light, with which the scanning is performed, being reflected by an object, and an object information acquiring unit that detects presence/absence of the object based on emission timing at which the light is emitted from the light projection unit and light receiving timing at which the light receiving unit receives the reflected light.

5. 发明授权

US09864296B2 Optical scanner and image forming device incorporating same 有权
公开(公告)号：US09864296B2
公开(公告)日：2018-01-09
申请号：US14643122
申请日：2015-03-10
申请人： Tomoya Fujii , Tadashi Nakamura , Nobuyuki Arai , Yoshinobu Sakaue , Noboru Kusunose , Daisuke Imaki
发明人： Tomoya Fujii , Tadashi Nakamura , Nobuyuki Arai , Yoshinobu Sakaue , Noboru Kusunose , Daisuke Imaki
IPC分类号： G03G15/043 , G02B26/12 , G03G15/04
CPC分类号： G03G15/0435 , G02B26/124 , G02B26/127 , G03G15/04045
摘要： An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.

6. 发明授权

US09817123B2 Object detector and sensor 有权
公开(公告)号：US09817123B2
公开(公告)日：2017-11-14
申请号：US15371650
申请日：2016-12-07
申请人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
发明人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
IPC分类号： G01S17/42 , H05B37/02 , G01S17/93 , G01S7/481 , G01S7/484 , G01S7/486 , G01S7/51
CPC分类号： G01S17/42 , G01S7/4815 , G01S7/484 , G01S7/4868 , G01S7/51 , G01S17/936 , H05B37/0227
摘要： An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, ach of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.

7. 发明授权

US09568605B2 Object detector and sensor 有权
标题翻译：物体检测器和传感器
公开(公告)号：US09568605B2
公开(公告)日：2017-02-14
申请号：US14554498
申请日：2014-11-26
申请人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
发明人： Kazuhiro Akatsu , Tadashi Nakamura , Kohji Sakai
IPC分类号： G01S17/42 , H05B37/02 , G01S17/93 , G01S7/481 , G01S7/484 , G01S7/486
CPC分类号： G01S17/42 , G01S7/4815 , G01S7/484 , G01S7/4868 , G01S7/51 , G01S17/936 , H05B37/0227
摘要： An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.
摘要翻译：一种物体检测器包括：投影仪，包括具有二维布置的多个发光体组的光源，每个发光体组具有多个发光体;受光器，接收从投影仪发出的光，并由物体和光源驱动器，其点亮并点亮光源的每个发光体组。

8. 发明授权

US09568358B2 Optical measurement device and vehicle 有权
标题翻译：光学测量装置和车辆
公开(公告)号：US09568358B2
公开(公告)日：2017-02-14
申请号：US13956748
申请日：2013-08-01
申请人： Tadashi Nakamura , Shigeaki Imai
发明人： Tadashi Nakamura , Shigeaki Imai
IPC分类号： G01J1/04 , G01C3/08 , G01S17/93 , G01S7/481 , G01S17/42
CPC分类号： G01J1/0422 , G01C3/08 , G01S7/4811 , G01S7/4815 , G01S7/4817 , G01S17/42 , G01S17/936
摘要： Disclosed is an optical measurement device including a first light source, an optical element that condenses a light beam emitted from the first light source, a light irradiator that irradiates the light beam onto an object; and a photo detector that detects reflected light or scattered light of the light beam from the object through an imaging system, the light beam being irradiated onto the object, wherein a first optical path length from the first light source to a first conjugate image of the first light source by the optical element is different from a second optical path length from the photo detector to a second conjugate image of the photo detector by the imaging system at least in a first direction.
摘要翻译：公开了一种光学测量装置，包括第一光源，冷凝从第一光源发射的光束的光学元件，将光束照射到物体上的光照射器; 以及光检测器，其通过成像系统检测来自物体的光束的反射光或散射光，所述光束照射到所述物体上，其中，从所述第一光源到所述第一光源的第一共轭图像的第一光路长度光学元件的第一光源不同于至少在第一方向上由成像系统从光电检测器到光电检测器的第二共轭图像的第二光程长度。

9. 发明申请

US20160061955A1 OPTICAL SCANNER, OBJECT DETECTOR, AND SENSING APPARATUS 有权
标题翻译：光学扫描仪，对象检测器和感应装置
公开(公告)号：US20160061955A1
公开(公告)日：2016-03-03
申请号：US14813321
申请日：2015-07-30
申请人： Shigeaki Imai , Masataka Uehira , Kohji Sakai , Tadashi Nakamura , Yukio Itami
发明人： Shigeaki Imai , Masataka Uehira , Kohji Sakai , Tadashi Nakamura , Yukio Itami
IPC分类号： G01S17/93 , G01S17/06 , G01S17/58
CPC分类号： G01S17/936 , G01S7/4817 , G01S7/484 , G01S17/10 , G01S17/42 , G01S17/58
摘要： An optical scanner is provided including a light source configured to emit light, a light source driving device configured to drive the light source, a light deflector having at least one rotating reflection plane and configured to deflect the light emitted from the light source to a scanning area, and a light detector configured to output a signal to control a timing at which scanning of the scanning area by the light deflected by the light deflector starts, where the light detector and the scanning area are sequentially scanned in a single scanning by one reflection plane of the light deflector, and the light source driving device drives the light source using a first driving method when the light scans the light detector, and drives the light source using a second driving method that is different from the first driving method when the light scans the scanning area.
摘要翻译：提供了一种光学扫描器，包括配置成发光的光源，被配置为驱动光源的光源驱动装置，具有至少一个旋转反射平面并被配置为使从光源发射的光偏转到扫描的光偏转器区域，以及光检测器，被配置为输出信号以控制由光偏转器偏转的光开始扫描区域的扫描的定时，其中光检测器和扫描区域在单次扫描中通过一次反射被顺序地扫描并且当光扫描光检测器时，光源驱动装置使用第一驱动方法驱动光源，并且当光照不同于第一驱动方法时使用与第一驱动方法不同的第二驱动方法来驱动光源扫描扫描区域。

10. 发明授权

US09229225B2 Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US09229225B2
公开(公告)日：2016-01-05
申请号：US13790216
申请日：2013-03-08
申请人： Yukio Itami , Tadashi Nakamura
发明人： Yukio Itami , Tadashi Nakamura
IPC分类号： G02B26/12 , B41J2/44 , B41J2/47
CPC分类号： G02B26/125 , B41J2/442 , B41J2/473 , G02B26/123 , G02B26/127
摘要： An optical scanning device includes a plurality of scanning optical systems that focus light beams deflected by an optical deflector onto corresponding scanning surfaces. The systems include a first scanning optical system and a second scanning optical system. The first scanning optical system and the second scanning optical system are disposed respectively at each side of a plane including a rotation axis of a polygonal-mirror optical deflector. Each of the scanning optical systems includes a synchronous detection optical system that determines a timing to start scanning the scanning surfaces with the light beams. When a time from the end of an effective scanning area in the second scanning optical system to synchronous detection in the first scanning optical system is Ta, and a time from the end of an effective scanning area in the first scanning optical system to synchronous detection in the second scanning optical system is Tb, Ta>Tb.
摘要翻译：光学扫描装置包括多个扫描光学系统，其将由光学偏转器偏转的光束聚焦到相应的扫描表面上。该系统包括第一扫描光学系统和第二扫描光学系统。第一扫描光学系统和第二扫描光学系统分别设置在包括多棱镜光学偏转器的旋转轴的平面的每一侧。每个扫描光学系统包括同步检测光学系统，其确定开始用光束扫描扫描表面的定时。当从第二扫描光学系统中的有效扫描区域结束到第一扫描光学系统中的同步检测的时间是从第一扫描光学系统中的有效扫描区域的结束到第一扫描光学系统中的同步检测的时间第二扫描光学系统是Tb，Ta> Tb。

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