公开(公告)号：US20030006367A1

公开(公告)日：2003-01-09

申请号：US10169461

申请日：2002-07-02

发明人： Martin Dieter Liess ,  Christoph Dobrusskin ,  Aldegonda Lucia Weijers

IPC分类号： G06M007/00

CPC分类号： G06F3/0421 ,  G01B9/02092 ,  G01P3/366 ,  G01P13/04 ,  G01S7/4811 ,  G01S7/4916 ,  G01S7/497 ,  G01S17/50 ,  G01S2007/4977

摘要： An optical input device for measuring the movement of a finger (15) ia accommodated in a housing provided with a transparent window (12) for transmitting a measurement beam (13) from a diode laser (3) to the finger and radiation reflected by the finger to a detector (4). This feature prevents that grease and dust disturb and block the measuring beam.

摘要翻译： 一种用于测量手指（15）的移动的光学输入装置，该手指容纳在设置有用于将测量光束（13）从二极管激光器（3）传送到手指的透明窗口（12）的壳体中，以及由 手指到检测器（4）。 此功能可防止油脂和粉尘干扰并阻挡测量梁。

公开(公告)号：US06233045B1

公开(公告)日：2001-05-15

申请号：US09311920

申请日：1999-05-14

申请人： Paul J. M. Suni ,  Christian J. Grund

发明人： Paul J. M. Suni ,  Christian J. Grund

IPC分类号： G01C308

CPC分类号： G01C3/08 ,  G01P3/366 ,  G01S7/4916 ,  G01S17/08 ,  G01S17/58 ,  H01S5/12 ,  H01S5/14

摘要： A self-mixing sensor usable for remotely measuring speed, vibrations, range, and length is provided in a manner making the device practical for economic implementation while retaining accuracy. In one embodiment, the device is configured to avoid mode hopping, such as by providing for relatively high loss for all modes other than the desired mode. Preferably this is accomplished by utilizing laser types that have a high degree of side mode supression, such as DFB lasers or through active or passive control of the amount of light permitted to reenter the laser.

摘要翻译： 提供了用于远程测量速度，振动，范围和长度的自混合传感器，使得该装置在保持精度的同时实现经济实现。 在一个实施例中，该设备被配置为避免模式跳频，例如通过为除所需模式之外的所有模式提供相对高的损耗。 优选地，这是通过利用具有高度侧向抑制的激光类型来实现的，例如DFB激光器，或通过主动或被动地控制允许重新进入激光器的光量。

公开(公告)号：US6100965A

公开(公告)日：2000-08-08

申请号：US53198

申请日：1998-04-01

申请人： Philippe Nerin

发明人： Philippe Nerin

IPC分类号： G01P5/00 ,  G01S7/48 ,  G01S17/08 ,  G01S17/32 ,  G01S17/58 ,  G01C3/08 ,  G01P3/36

CPC分类号： G01S17/325 ,  G01S17/58 ,  G01S7/4916

摘要： The purpose of this invention is a laser speed measurement and range finding device, with coherent detection comprising:a microlaser (10) with continuous emission comprising an active laser medium (10) and a microlaser cavity (16, 18),means (20, 22, 24) for modulating an optical frequency of a beam output by the microlaser,means (28) of outputting a signal depending on:firstly, the Doppler frequency ##EQU1## where .lambda. is the microlaser emission wave length and V is the speed of the target (2) to be detected,secondly, a modulation frequency F.tau. caused by interference in the cavity of the frequency modulated laser oscillation and the signal from a target (2) placed at a distance Z.

摘要翻译： 本发明的目的是一种激光测速和测距装置，具有相干检测，包括：具有连续发射的微激光器（10），包括有源激光介质（10）和微激光腔（16,18） 22,24），用于调制由微激光器输出的光束的光频率;根据以下方式输出信号的装置（28）：首先是多普勒频率，其中λ是微激光发射波长，V是目标的速度（ 2），其次，由频率调制激光振荡的空腔中的干扰引起的调制频率F tau和来自放置在距离Z处的目标（2）的信号。

公开(公告)号：US5748295A

公开(公告)日：1998-05-05

申请号：US688706

申请日：1996-07-31

申请人： Brian W. Farmer

发明人： Brian W. Farmer

IPC分类号： G01S7/489 ,  G01S17/46 ,  G01C3/08 ,  G01P3/36

CPC分类号： G01S17/325 ,  G01S17/58 ,  G01S7/4916

摘要： The present invention provides a range finding system which utilizes feedback to induce mode hopping in a standing wave generator and which determines the range, direction and velocity of an object with respect to the range finding system based on the mode hop rate. The present invention provides a novel sampling technique which prevents aliasing by modulating the standing wave generator at a frequency equal to or greater than .pi. times the frequency at which the optical path between the object and the standing wave generator is oscillating or vibrating. In order to account for Doppler effect, the standing wave interference coupling is analyzed over one period of the frequency modulation rate of the standing wave generator. A spectral analysis algorithm is implemented which determines the mode hop rate of the standing wave generator and the range, direction and velocity of the object with respect to the range finding system based on the determined mode hop rate. Implementation of the spectral analysis algorithm improves signal-to-noise ratio by avoiding thresholding to provide a range finding system which is substantially amplitude independent.

摘要翻译： 本发明提供一种测距系统，其利用反馈来诱导驻波发生器中的跳频，并且基于所述模式跳频来确定对象相对于所述测距系统的范围，方向和速度。 本发明提供了一种新颖的采样技术，其通过以等于或大于物体和驻波发生器之间的光路振荡或振动的频率的π倍的频率调制驻波发生器来防止混叠。 为了考虑多普勒效应，在驻波产生器的频率调制率的一个周期内分析驻波干扰耦合。 基于所确定的模式跳频率，实现了频谱分析算法，其确定驻波发生器的模式跳频和对象相对于测距系统的范围，方向和速度。 频谱分析算法的实现通过避免阈值提供提供信噪比，以提供基本上与振幅无关的测距系统。

公开(公告)号：US11796644B2

公开(公告)日：2023-10-24

申请号：US16814587

申请日：2020-03-10

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Raymond Sarkissian ,  Keyvan Sayyah ,  Biqin Huang

IPC分类号： G02F1/295 ,  G02B6/12 ,  G02B6/26 ,  G02B6/42 ,  G02B6/10 ,  G01S7/481 ,  G01S7/4911 ,  G01S7/4912 ,  G01S17/88 ,  G02B6/122 ,  G01S17/10 ,  G02F1/095 ,  B60R11/00 ,  G02F1/01

CPC分类号： G01S7/4818 ,  G01S7/4813 ,  G01S7/4814 ,  G01S7/4815 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/4911 ,  G01S7/4916 ,  G01S17/10 ,  G01S17/88 ,  G02B6/12004 ,  G02B6/1228 ,  G02F1/0955 ,  B60R11/00 ,  G02B2006/1215 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/12121 ,  G02B2006/12147 ,  G02F1/0147

摘要： An apparatus including a light detection and ranging (LiDAR) antenna of an optical phased array includes a silicon-on-insulator substrate including a silicon wire waveguide embedded within the substrate and a grating layer disposed over the substrate. The grating layer includes a silicon nitride layer coating the silicon-on-insulator substrate and including a plurality of etchings formed in a direction perpendicular to a longitudinal axis of the optical phased array and a silicon oxynitride layer coating the silicon nitride layer and filling the etchings. The etchings are relatively thin in the direction of the longitudinal axis of the optical phased array at a first end of the optical antenna and are relatively thick in the direction of the longitudinal axis at a second end. The etchings gradually increase in thickness between the first end of the optical phased array and the second end of the optical antenna.

公开(公告)号：US11774342B2

公开(公告)日：2023-10-03

申请号：US16833199

申请日：2020-03-27

申请人： Apple Inc.

发明人： Mehmet Mutlu ,  Miaolei Yan ,  Michael K. Brown ,  Richard Yeh

IPC分类号： G01N15/14 ,  G01N15/06 ,  G01S7/4912 ,  G01P5/26 ,  G01P5/00 ,  G01P5/20

CPC分类号： G01N15/1434 ,  G01N15/06 ,  G01P5/001 ,  G01P5/20 ,  G01P5/26 ,  G01S7/4916 ,  G01N2015/0693 ,  G01N2015/1454

摘要： Various sensors, including particulate matter sensors, are described. One particulate matter sensor includes a self-mixing interferometry sensor and a set of one or more optical elements. The set of one or more optical elements is positioned to receive an optical emission of the self-mixing interferometry sensor, split the optical emission into multiple beams, and direct each beam of the multiple beams in a different direction. The self-mixing interferometry sensor is configured to generate particle speed information for particles passing through respective measurement regions of the multiple beams.

公开(公告)号：US11726178B2

公开(公告)日：2023-08-15

申请号：US16919053

申请日：2020-07-01

申请人： HYUNDAI MOBIS Co., Ltd.

发明人： Young Shin Kim ,  Won Gyum Kim ,  Kyung Rin Kim ,  Sung Eun Jo

IPC分类号： G01S7/481 ,  G01S17/42 ,  G01S7/4912 ,  G01S7/4861 ,  G01S17/931

CPC分类号： G01S7/4811 ,  G01S7/4861 ,  G01S7/4916 ,  G01S17/42 ,  G01S17/931

摘要： A LIDAR sensor apparatus and a control method thereof. The LIDAR sensor apparatus includes a transmitter configured to transmit a laser, first and second receivers each configured to receive a reflected signal reflected from an object after the laser is transmitted through the transmitter, a control unit configured to calculate first and second distances by performing signal processing on first and second signals received from the first and second receivers after the laser is transmitted through the transmitter, and to calculate an intermediate distance by performing signal processing on an overlapping signal obtained by overlapping the first and second signals, and an output unit configured to output the first and second distances and the intermediate distance calculated by the control unit.

公开(公告)号：US11680788B2

公开(公告)日：2023-06-20

申请号：US17393278

申请日：2021-08-03

申请人： Apple Inc.

发明人： Mehmet Mutlu ,  Miaolei Yan

IPC分类号： G01B9/02 ,  G01N15/06 ,  G01N15/10 ,  G01S7/4912 ,  G01S17/58

CPC分类号： G01B9/02092 ,  G01B9/02045 ,  G01N15/06 ,  G01N15/10 ,  G01S7/4916 ,  G01S17/58 ,  G01N2015/0693 ,  G01N2015/1075

摘要： A portable electronic device is operable in a particulate matter concentration mode where the portable electronic device uses a self-mixing interferometry sensor to emit a beam of coherent light from an optical resonant cavity, receive a reflection or backscatter of the beam into the optical resonant cavity, produce a self-mixing signal resulting from a reflection or backscatter of the beam of coherent light, and determine a particle velocity and/or particulate matter concentration using the self-mixing signal. The portable electronic device is also operable in an absolute distance mode where the portable electronic device determines whether or not an absolute distance determined using the self-mixing signal is outside or within a particulate sensing volume associated with the beam of coherent light. If not, the portable electronic device may determine a contamination and/or obstruction is present that may result in inaccurate particle velocity and/or particulate matter concentration determination.

公开(公告)号：US11675063B2

公开(公告)日：2023-06-13

申请号：US17463860

申请日：2021-09-01

申请人： OURS Technology, LLC

发明人： Andrew Steil Michaels ,  Sen Lin

IPC分类号： G01S7/4912 ,  G01S7/4861 ,  G01S17/34 ,  G01S17/931 ,  G01S7/481 ,  G01S7/499 ,  G01S17/32 ,  B60W60/00

CPC分类号： G01S7/4916 ,  G01S7/4817 ,  G01S7/4861 ,  G01S7/499 ,  G01S17/32 ,  G01S17/34 ,  G01S17/931 ,  B60W60/001 ,  B60W2420/52

摘要： A light detection and ranging (LIDAR) system includes a transmitter, a receiving pixel, a rotating mirror, and a beam displacement apparatus. The transmitter is configured to emit a transmit beam. The receiving pixel is configured to receive a returning beam. The rotating mirror is configured to direct the transmit beam to a target and direct the returning beam to the receiving pixel. The beam displacement apparatus is disposed between the receiving pixel and the rotating mirror. The beam displacement apparatus is configured to introduce a displacement to the returning beam to compensate for a spacing between the transmitter and the receiving pixel.

公开(公告)号：US20160320173A1

公开(公告)日：2016-11-03

申请号：US15104952

申请日：2014-10-15

申请人： UNIVERSITAT POLITÈCNICA DE CATALUNYA

发明人： Santiago Royo Royo ,  Francisco Javier Azcona Guerro ,  Ajit Jha

IPC分类号： G01B9/02 ,  G01B11/02

CPC分类号： G01B9/02092 ,  G01B9/02004 ,  G01B9/0207 ,  G01B11/026 ,  G01S7/4916 ,  G01S17/32 ,  G01S17/58

摘要： A method and system to implement the method of measuring a change in an optical path length using differential laser self-mixing interferometry. The method includes obtaining a reference SMI signal (Sr) and a main measurement SMI signal (Sm) of a laser (LD) and determining the relative change in the optical path length between the (LD) and a target (T) in a range between 0 and λ/2, by comparing the relative positions along time of fringes or transitions of the (Sm) and (Sr). The (Sr) and the (Sm) are obtained at different moments once backscattered laser light (br) is generated from the reflection on said target (T) of a reference and a main measurement laser light beam emitted by the laser (LD) and while being modulated according to a specific modulation pattern that maintained while both the (Sr) and the (Sm) are acquired and has re-entered its laser cavity.

摘要翻译： 使用差分激光自混合干涉法来实现测量光路长度变化的方法和系统。 该方法包括获得激光（LD）的参考SMI信号（Sr）和主测量SMI信号（Sm），并确定在（LD）和目标（T）之间的光程长度的相对变化范围 在0和λ/ 2之间，通过比较（Sm）和（Sr）的条纹或转变时间的相对位置。 在不同的时刻获得（Sr）和（Sm），一旦从基准的所述目标（T）上的反射和由激光（LD）发射的主测量激光束产生反向散射激光（br），并且 同时根据在（Sr）和（Sm）两者中获得并且已经重新进入其激光腔的特定调制图案进行调制。