公开(公告)号：US20180217053A1

公开(公告)日：2018-08-02

申请号：US15748261

申请日：2016-08-09

Applicant: TOKUSHIMA UNIVERSITY ,  FUJIKIN INCORPORATED

Inventor： Yoshihiro DEGUCHI ,  Masaaki NAGASE ,  Michio YAMAJI ,  Nobukazu IKEDA ,  Kouji NISHINO ,  Masayoshi KAWASHIMA ,  Kazuteru TANAKA

IPC: G01N21/31 ,  G01N21/59 ,  G01J3/42

CPC classification number: G01N21/3103 ,  G01J3/0218 ,  G01J3/10 ,  G01J3/28 ,  G01J3/42 ,  G01J3/433 ,  G01J2001/4242 ,  G01J2003/2866 ,  G01N21/274 ,  G01N21/33 ,  G01N21/3504 ,  G01N21/59 ,  G01N2021/3133 ,  G01N2201/0625 ,  G01N2201/0627

Abstract: A concentration measurement device including at least one light source; a measurement cell for containing a fluid to be measured; a splitter for dividing light from the light source into incident light being incident into the measurement cell and non-incident light not being incident into the measurement cell; a transmitted-light detector for detecting transmitted light that is the incident light having passed through the measurement cell; a non-incident light detector for detecting the non-incident light; and an arithmetic part for correcting a detection signal of the transmitted-light detector using a detection signal of the non-incident light detector.

公开(公告)号：US20170141844A1

公开(公告)日：2017-05-18

申请号：US15323728

申请日：2015-06-02

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Takahide SAKAMOTO

IPC: H04B10/079 ,  G01J1/44 ,  G01J11/00

CPC classification number: H04B10/079 ,  G01J1/16 ,  G01J1/44 ,  G01J11/00 ,  G01J2001/1678 ,  G01J2001/4238 ,  G01J2001/4242 ,  G01J2001/4406 ,  G02F1/01 ,  H04J14/02

Abstract: To realize collective measurement of ultrawide-band optical signals which have exceeded an electrical band limit. This photodetection device (100) comprises: a time-delay adjustment means (10) into which is input an optical signal that is a detection object; an optical frequency comb generator (20) that generates an optical frequency comb; a photomixer (30) that photomixes optical signal series which are sequentially output from the time delay adjustment means (10) and which were subjected to time adjustment, and the optical frequency comb signal which is output from the optical frequency comb generator (20); and a photodetector (40) that detects the mixed signal output from the photomixer (30). The time delay adjustment means (10) performs time adjustment on the optical signal series so that each of the time adjusted optical signal series is photomixed with the optical frequency comb at different timings in the photomixer (30).

公开(公告)号：US20160334507A1

公开(公告)日：2016-11-17

申请号：US15151812

申请日：2016-05-11

Applicant: Andreas Hangauer ,  Gerard Wysocki

Inventor： Andreas Hangauer ,  Gerard Wysocki

IPC: G01S7/48 ,  G01S17/32

CPC classification number: G01S7/4802 ,  G01J3/0278 ,  G01J3/4338 ,  G01J2001/4242 ,  G01N21/39 ,  G01N2021/1793 ,  G01N2021/394 ,  G01S17/325 ,  G01S17/95 ,  Y02A90/19

Abstract: A system for simultaneous optical pathlength determination and remote chemical sensing of a sample disposed along an optical path. A modulated laser source configured for modulated light emission so that at least one spectral sideband with a sideband frequency is created, the modulated light emission is directed along the optical path and sideband frequency is varied over time. A detector is configured to detect transmitted light along the optical path and generate a detected light intensity signal. A frequency down-converter is configured to receive the detected light emission signal and generate a frequency down-converted light intensity signal. A demodulator is configured to demodulate the frequency of the down-converted light intensity signal and output an instantaneous frequency. A pathlength calculator is configured to determine an optical pathlength to the sample based on the instantaneous frequency. A frequency down-converted light intensity signal is simultaneously output for spectroscopic chemical sensing.

Abstract translation: 一种用于沿着光路设置的样本的同时光程长度确定和远程化学感测的系统。 被配置用于调制发光的调制激光源，使得产生具有边带频率的至少一个频谱边带，调制光发射沿着光路被引导，并且边带频率随时间变化。 检测器被配置为检测沿着光路的透射光并产生检测到的光强度信号。 降频转换器被配置为接收检测到的发光信号并产生降频转换的光强度信号。 解调器被配置为解调下变频光强度信号的频率并输出瞬时频率。 路径长度计算器被配置为基于瞬时频率确定样本的光程长度。 同时输出降频转换光强度信号用于光谱化学感测。

公开(公告)号：US20160301367A1

公开(公告)日：2016-10-13

申请号：US15089987

申请日：2016-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H03F1/26 ,  G01N21/39

CPC classification number: G01N21/39 ,  G01J3/28 ,  G01J3/4338 ,  G01J2001/4242 ,  G01N2201/06113 ,  G01N2201/12

Abstract: A gas sensing system includes a signal generator including a wavelength tunable laser, the signal generator providing a first periodic signal and a second periodic signal, wherein the first periodic signal comprises a wavelength scanning signal and the second periodic signal comprises a modulation signal; an optical signal absorption path which is wavelength selective, wherein the generated signal covers at least one of the absorbance band; a signal detector that uses lock-in detection to detect a second harmonic of the second periodic signal after absorption, the signal detector further including a local reference generator, a multiplier, and a low pass filter; a local reference includes a first path (ref1) that outputs sinusoidal signal with frequency equals to that of the second signal in signal generator, and a second path (ref2) that outputs sinusoidal signal of two times ref1 frequency; and a local reference generator having a first phase shifter that is configurable from 0 to 2π and a second phase shifter that shifts 90-degree, wherein the first phase shifter is for an alignment of ref1 with the modulation signal and the second phase shifter provides 90-degree shifts for ref2 from ref1, wherein the first and second paths (ref1 and ref2) are selected by a switch, wherein the switch uses the first path during initialization and the second path for normal operation.

Abstract translation: 气体感测系统包括信号发生器，其包括波长可调谐激光器，信号发生器提供第一周期信号和第二周期信号，其中第一周期信号包括波长扫描信号，第二周期信号包括调制信号; 一种波长选择性的光信号吸收路径，其中产生的信号覆盖吸收带中的至少一个; 信号检测器，其使用锁定检测来检测吸收之后的第二周期信号的二次谐波，所述信号检测器还包括本地参考发生器，乘法器和低通滤波器; 本地参考包括输出频率等于信号发生器中的第二信号的正弦信号的第一路径（ref1）和输出两倍ref1频率的正弦信号的第二路径（ref2）; 以及具有可配置为0至2π的第一移相器和90度移位的第二移相器的本地参考发生器，其中第一移相器用于ref1与调制信号的对准，而第二移相器提供90 ref2从ref1进行偏移，其中第一和第二路径（ref1和ref2）由开关选择，其中开关在初始化期间使用第一路径，并且第二路径用于正常操作。

公开(公告)号：US09459140B2

公开(公告)日：2016-10-04

申请号：US14195862

申请日：2014-03-04

Applicant: PixArt Imaging Inc.

Inventor： Han-Ping Cheng ,  Chia-Cheun Liang ,  Ming-Tsan Kao

IPC: G01J1/10 ,  H04N1/00 ,  G01J1/44 ,  G01J1/42

CPC classification number: G01J1/10 ,  G01J1/4228 ,  G01J2001/4242 ,  G01J2001/444 ,  H04N1/00

Abstract: A method of an optical detecting device for synchronizing an exposure timing sequence of an image detector with a light emitting timing sequence of a reference light source is disclosed. The method includes capturing a continued image set according to a predetermined period, analyzing intensity variation of the continued image set, and adjusting the exposure timing sequence of an image detector according to the intensity variation, so as to synchronize the exposure timing sequence of the image detector with the light emitting timing sequence of the reference light source.

Abstract translation: 公开了一种用于使图像检测器的曝光定时序列与参考光源的发光定时序列同步的光学检测装置的方法。 该方法包括根据预定时段捕获连续图像集，分析连续图像集合的强度变化，以及根据强度变化调整图像检测器的曝光定时序列，以使图像的曝光定时序列同步 检测器具有参考光源的发光定时序列。

公开(公告)号：US20160097797A1

公开(公告)日：2016-04-07

申请号：US14693327

申请日：2015-04-22

Applicant: Government of the United States, as represented the Secretary of the Air Force

Inventor： Preetpaul S. Devgan ,  Nicholas G. Usechak

IPC: G01R29/08 ,  G02F1/01 ,  G01J1/42

CPC classification number: G01R29/0892 ,  G01J1/42 ,  G01J2001/4242 ,  H04B10/90 ,  H04B2210/006

Abstract: An apparatus is provided for RF signal discrimination. A master laser of the apparatus is connected to an optical input of an optical phase modulator. The optical phase modulator is configured to receive a plurality of RF signals at an RF input and further configured to receive an output from the master laser at an optical input. A slave laser operating below a lasing threshold is configured to receive a modulated output from the optical phase modulator. An optical filter is configured to receive a mixed signal generated inside the slave laser. A photodetector receives the filtered mixed signal and is configured to recover a RF signal from the plurality of RF signals, where a frequency of a sideband of the recovered RF signal corresponds to a mode of the slave laser.

Abstract translation: 提供了用于RF信号鉴别的装置。 该装置的主激光器连接到光相位调制器的光输入端。 光相位调制器被配置为在RF输入处接收多个RF信号，并且还被配置为在光输入处接收来自主激光器的输出。 操作在激光阈值以下的从属激光器被配置为接收来自光相位调制器的调制输出。 光滤波器被配置为接收在从激光器内部产生的混合信号。 光电检测器接收经滤波的混合信号，并且被配置为从多个RF信号中恢复RF信号，其中恢复的RF信号的边带的频率对应于从属激光器的模式。

公开(公告)号：US09129548B2

公开(公告)日：2015-09-08

申请号：US13678349

申请日：2012-11-15

Applicant: Apple Inc.

Inventor： Dong Zheng

IPC: G06F3/038 ,  G09G3/36 ,  G09G5/10 ,  G01J3/51 ,  G01J1/42

CPC classification number: G09G5/10 ,  G01J1/4204 ,  G01J1/4228 ,  G01J3/513 ,  G01J2001/4242 ,  G02F1/13318 ,  G02F2201/58 ,  G09G2320/0626 ,  G09G2360/144

Abstract: An electronic device may have a display with a brightness that is adjusted based on ambient light data from one or more ambient light sensors. An ambient light sensor may include at least one silicon-based photosensor. The silicon-based photosensor may generate a corresponding raw sensor reading. Processing circuitry associated with the ambient light sensor may analyze the raw sensor reading to determine the type of light source that is present by comparing measurements from at least two different photosensors, by determining the color temperature of the light source, and/or by determining the modulation frequency of the light source. A compensation factor may then be selected by referring to a lookup table. The processing circuitry may compute a compensated sensor reading based on the raw sensor reading and the selected compensation factor. The brightness of the display may be adjusted based on the compensated sensor reading computed in this way.

Abstract translation: 电子设备可以具有基于来自一个或多个环境光传感器的环境光数据调整的亮度的显示器。 环境光传感器可以包括至少一个硅基光电传感器。 硅基光电传感器可以产生相应的原始传感器读数。 与环境光传感器相关联的处理电路可以分析原始传感器读数以通过比较来自至少两个不同光电传感器的测量来确定所存在的光源的类型，通过确定光源的色温，和/或通过确定 光源的调制频率。 然后可以通过参考查找表来选择补偿因子。 处理电路可以基于原始传感器读数和所选择的补偿因子来计算补偿的传感器读数。 可以基于以这种方式计算的补偿传感器读数来调整显示器的亮度。

公开(公告)号：US20150211928A1

公开(公告)日：2015-07-30

申请号：US14427481

申请日：2014-06-20

Applicant: Panasonic Intellectual Property Management Co., Lt

Inventor： Tatsuo Itoh ,  Koichi Kusukame ,  Aki Yoneda

IPC: G01J3/427 ,  G01J3/10

CPC classification number: G01J3/427 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0224 ,  G01J3/0237 ,  G01J3/0243 ,  G01J3/0278 ,  G01J3/0289 ,  G01J3/10 ,  G01J3/2803 ,  G01J3/32 ,  G01J3/42 ,  G01J3/433 ,  G01J2001/4242 ,  G01J2003/064 ,  G01J2003/102 ,  G01J2003/104 ,  G01J2003/106 ,  G01N21/359

Abstract: A light radiating portion (11a, 11b, 12, 51, 52) radiates light with wavelength λ1 having predetermined absorptivity for an object (16) and light with wavelength λ2 having smaller absorptivity for the object (16) than the wavelength λ1, to a target, so as to scan in 2-dimensional directions. A light receiving portion (17) receives scattered lights reflected by the target based on light with wavelength λ1 and light with wavelength λ2. A measuring portion (18) generates information used for detection of the object (16) at the target, based on difference between the two scattered lights with wavelength λ1 and wavelength λ2 received by the light receiving portion (17). An output portion (53) outputs whether or not the object is present at the target, by 2-dimensional area information, based on scanning by the light radiating portion (11a, 11b, 12, 51, 52) and information generated by the measuring portion (18).

Abstract translation: 光辐射部分（11a，11b，12,51,52）将对物体（16）具有预定吸收率的波长λ1的光和对象（16）的波长λ1的波长λ2的波长比波长λ1辐射到 目标，以便在二维方向扫描。 光接收部分（17）基于具有波长λ1的光和波长λ2的光接收由目标反射的散射光。 测量部分（18）基于由光接收部分（17）接收的波长λ1和波长λ2的两个散射光之间的差异，生成用于目标物体（16）的检测的信息。 输出部（53）基于由光照射部（11a，11b，12,51,52）的扫描和由测量生成的信息，通过二维区域信息，输出对象是否存在于目标 部分（18）。

公开(公告)号：US09030663B2

公开(公告)日：2015-05-12

申请号：US13285292

申请日：2011-10-31

Applicant: Michael G. Braun ,  Jeremy T. Dobler

Inventor： Michael G. Braun ,  Jeremy T. Dobler

IPC: G01N21/00 ,  G01J3/433 ,  G01N21/3504 ,  G01J3/02 ,  G01N21/31 ,  G01J1/42

CPC classification number: G01J3/433 ,  G01J3/0297 ,  G01J2001/4242 ,  G01N21/314 ,  G01N21/3504 ,  G01N2021/3513

Abstract: Remote absorption spectroscopy uses coded electromagnetic transmission directed through a medium under investigation to one or more remote receivers. The coded transmission includes at least one wavelength coincident with an absorption band of interest and one wavelength in an off-line band and a predefined relationship between spectral components in and outside the absorption band is controlled. The relationship between spectral components may be evaluated at the receiver to determine whether deviation thereof from the controlled relationship at the transmitter exists at the receiver. The deviation of the received optical signal from the prescribed relationship is processed to indicate the absorption of the radiation in the absorption band.

Abstract translation: 远程吸收光谱仪使用通过正在研究的介质引导的编码电磁传输到一个或多个远程接收器。 编码的传输包括与感兴趣的吸收频带和离线频带中的一个波长一致的至少一个波长和吸收频带内外的频谱分量之间的预定关系。 可以在接收机处评估频谱分量之间的关系，以确定其在发射机处的受控关系的偏差是否存在于接收机处。 处理接收到的光信号与规定关系的偏差，以表示吸收带中的辐射的吸收。

公开(公告)号：US08351039B2

公开(公告)日：2013-01-08

申请号：US12926027

申请日：2010-10-21

Applicant: Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

Inventor： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

IPC: G01N21/00

CPC classification number: G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/10 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/0697 ,  G02B6/2861

Abstract: A spectroscopy method, includes guiding pulse laser light to an optical fiber, which mutually reacts with a sample to be measured of a light absorptance characteristic, outputting ring down pulse light obtained through light absorption of the sample, measuring an absorptance characteristic of the sample based on an attenuation characteristic of the ring down pulse light, and setting the pulse laser light as wide-spectrum laser light, setting the optical fiber as a strong dispersive optical fiber, and increasing a pulse width of the ring down pulse light to measure a wavelength absorptance characteristic based on a ring down attenuation constant of a pulse train with respect to a time sequence corresponding to a wavelength.

Abstract translation: 光谱学方法包括将脉冲激光引导到与待测样品相互反应的光吸收特性的光纤，输出通过样品的光吸收获得的环形脉冲光，测量样品的吸收特性 根据环形脉冲光的衰减特性，将脉冲激光设定为宽光谱激光，将光纤设为强分散光纤，增加环形脉冲光的脉冲宽度，测定波长 基于相对于对应于波长的时间序列的脉冲序列的衰减衰减常数的吸收特性。