-
公开(公告)号：US08935960B2
公开(公告)日：2015-01-20
申请号：US13010333
申请日：2011-01-20
CPC分类号： G01N21/1702 , G01N33/22 , G01N33/227
摘要： A kit for detecting the presence of an explosive includes a pulsed focused energy source located at a target distance away from a substrate, the energy having a magnitude sufficient to release the internal energy of an explosive if present on the substrate and thereby generate an acoustic wave. The kit also includes a detector adapted to detect the acoustic wave at a detection distance away from the substrate.
摘要翻译： 用于检测爆炸物存在的试剂盒包括位于远离基底的目标距离的脉冲聚焦能量源，该能量具有足以释放爆炸物的内部能量的量值，如果存在于基底上，从而产生声波 。 该试剂盒还包括一个检测器，适用于检测距离基底的检测距离处的声波。
-
公开(公告)号：US20120330162A1
公开(公告)日：2012-12-27
申请号：US13533254
申请日：2012-06-26
申请人： Nandini Rajan , Sumanth Kaushik , Daniel Schuette
发明人： Nandini Rajan , Sumanth Kaushik , Daniel Schuette
CPC分类号： A61B5/11 , A61B5/1101 , A61B5/1103 , A61B5/6821 , A61B2562/043 , G06T7/254 , G06T2200/28 , G06T2207/20224 , G06T2207/30041
摘要： Traditional methods of detecting a moving target involve acquisition of video rate imagery in which data is acquired, stored, transmitted and then processed. Processing requires software for high precision frame-to-frame registration, detection and tracking. Example embodiments of the present invention include a method and an apparatus for generating instantaneous velocity maps that do not require acquisition, transmission, storing or processing of video-rate data. Incident radiation is directed onto one or more detectors, the detectors operating at a frame rate. The detectors acquire the first and second complementary sub-images of a single frame. The first and second complementary sub-images are combined to yield the change detection map. Example embodiments of the methods and devices described herein can be used in automatic detection of motion without tracking, optimization of image deblurring and optimization of detection of high speed and high frequency events, among others.
摘要翻译： 检测移动目标的传统方法涉及获取，存储，传输和然后处理数据的视频速率图像的获取。 处理需要用于高精度帧到帧配准，检测和跟踪的软件。 本发明的示例性实施例包括用于产生不需要获取，传输，存储或处理视频速率数据的瞬时速度图的方法和装置。 入射辐射被引导到一个或多个检测器上，检测器以帧速率工作。 检测器获取单个帧的第一和第二互补子图像。 组合第一和第二互补子图像以产生变化检测图。 本文描述的方法和装置的示例性实施例可用于运动的自动检测，而不进行跟踪，优化图像去模糊和优化高速和高频事件的检测等。
-
公开(公告)号：US20210217402A1
公开(公告)日：2021-07-15
申请号：US16736212
申请日：2020-01-07
摘要： The ability to communicate with a specific subject at a prescribed location who lacks any communications equipment opens up many intriguing possibilities. Communications across noisy rooms, hail and warn applications, and localized communications directed at only the intended recipient are a few possibilities. We disclose and show localized acoustic communications, which we call photoacoustic communications, with a listener at long standoff distances using a modulated laser transmitted toward the receiver's ear. The optically encoded information is converted into acoustic messages via the photoacoustic effect. The photoacoustic conversion of the optical information into an audible signal occurs via the absorption of the light by ambient water vapor in the near area of the receiver's ear followed by airborne acoustic transmission to the ear. The recipient requires no external communications equipment to receive audible messages.
-
公开(公告)号：US08514393B2
公开(公告)日：2013-08-20
申请号：US13016143
申请日：2011-01-28
IPC分类号： G01J3/28
CPC分类号： G01J3/42 , G01N21/3581 , G01N2021/1793
摘要： Disclosed herein are a system and corresponding method for sensing terahertz radiation. The system collects terahertz radiation scattered from a target and upconverts the collected radiation to optical frequencies. A frequency-domain spectrometer senses spectral components of the upconverted signal in parallel to produce a spectroscopic measurement of the entire band of interest in a single shot. Because the sensing system can do single-shot measurements, it can sense moving targets, unlike sensing systems that use serial detection, which can only be used to sense stationary objects. As a result, the sensing systems and methods disclosed herein may be used for real-time imaging, including detection of concealed weapons, medical imaging, and hyperspectral imaging.
-
公开(公告)号：US20120186352A1
公开(公告)日：2012-07-26
申请号：US13010333
申请日：2011-01-20
IPC分类号： G01H9/00
CPC分类号： G01N21/1702 , G01N33/22 , G01N33/227
摘要： A kit for detecting the presence of an explosive includes a pulsed focused energy source located at a target distance away from a substrate, the energy having a magnitude sufficient to release the internal energy of an explosive if present on the substrate and thereby generate an acoustic wave. The kit also includes a detector adapted to detect the acoustic wave at a detection distance away from the substrate.
摘要翻译： 用于检测爆炸物存在的试剂盒包括位于远离基底的目标距离的脉冲聚焦能量源，该能量具有足以释放爆炸物的内部能量的量值，如果存在于基底上，从而产生声波 。 该试剂盒还包括一个检测器，适用于检测距离基底的检测距离处的声波。
-
公开(公告)号：US20120008140A1
公开(公告)日：2012-01-12
申请号：US13016143
申请日：2011-01-28
IPC分类号： G01J3/00
CPC分类号： G01J3/42 , G01N21/3581 , G01N2021/1793
摘要： Disclosed herein are a system and corresponding method for sensing terahertz radiation. The system collects terahertz radiation scattered from a target and upconverts the collected radiation to optical frequencies. A frequency-domain spectrometer senses spectral components of the upconverted signal in parallel to produce a spectroscopic measurement of the entire band of interest in a single shot. Because the sensing system can do single-shot measurements, it can sense moving targets, unlike sensing systems that use serial detection, which can only be used to sense stationary objects. As a result, the sensing systems and methods disclosed herein may be used for real-time imaging, including detection of concealed weapons, medical imaging, and hyperspectral imaging.
摘要翻译： 这里公开了用于感测太赫兹辐射的系统和相应的方法。 该系统收集从目标散射的太赫兹辐射，并将收集的辐射上变频到光频率。 频域光谱仪平行地感测上转换信号的光谱分量，以在单次拍摄中产生整个感兴趣的频带的光谱测量。 因为感测系统可以进行单次测量，所以它可以感测移动目标，不同于使用串行检测的传感系统，只能用于感测静止物体。 结果，本文公开的感测系统和方法可用于实时成像，包括隐藏武器的检测，医学成像和高光谱成像。
-
公开(公告)号：US20090087186A1
公开(公告)日：2009-04-02
申请号：US11863761
申请日：2007-09-28
申请人： Kevin W. Holman , David G. Kocher , Jae H. Kyung , Leaf A. Jiang , Sumanth Kaushik , Richard M. Heinrichs
发明人： Kevin W. Holman , David G. Kocher , Jae H. Kyung , Leaf A. Jiang , Sumanth Kaushik , Richard M. Heinrichs
IPC分类号： H04J14/08
CPC分类号： H04B10/508 , H01S3/0057
摘要： A time-multiplexed waveform generator includes a wavelength splitter that receives an input optical signal and spectrally separates the input optical signal into a plurality of frequency components. A plurality of intensity modulators receives each of the frequency components and passes each of the frequency components for a selective time period, and then extinguishes that frequency for the remainder of a chirp time, the plurality of intensity modulators producing a plurality of first output signals. A plurality of adjustable delay lines is positioned after the intensity modulators and receives the first output signals. Each of the adjustable delay lines enables phase control of each of the frequency components associated with the first output signals for compensating any relative drifts of the path lengths and phase coherently stitching a plurality of sub-chirps together. The adjustable delay lines produce a plurality of second output signals. A wavelength combiner receives the second output signals and recombines the output signals to produce a stair-step waveform output signal.
摘要翻译： 时间复用波形发生器包括：波长分离器，其接收输入光信号并将输入光信号频谱分离成多个频率分量。 多个强度调制器接收每个频率分量并且在选择时间段内通过每个频率分量，然后在啁啾时间的剩余部分中消除该频率，该多个强度调制器产生多个第一输出信号。 多个可调延迟线位于强度调制器之后，并接收第一输出信号。 每个可调延迟线使得能够与与第一输出信号相关联的每个频率分量进行相位控制，以补偿路径长度的相对漂移和将多个子啁啾相干地拼接在一起的相位。 可调延迟线产生多个第二输出信号。 波长组合器接收第二输出信号并重新组合输出信号以产生阶梯状波形输出信号。
-
公开(公告)号：US20080074674A1
公开(公告)日：2008-03-27
申请号：US11626966
申请日：2007-01-25
申请人： Jerry C. Chen , Sumanth Kaushik
发明人： Jerry C. Chen , Sumanth Kaushik
IPC分类号： G01B11/02
摘要： Described are a sensor and a method for measuring a vibration of a surface obscured from view. The sensor includes a narrowband source of a terahertz beam, a beamsplitter, a beam combiner and a terahertz detector. The beamsplitter splits the terahertz beam into a sample beam for irradiating the surface and a reference beam. The beam combiner combines the sample beam scattered from the surface and the reference beam. The terahertz detector generates an electrical signal based on a modulation of the power of the combined beams due to the vibrating surface. The electrical signal indicates a characteristic of the surface vibration. Homodyne or heterodyne detection can be utilized. Advantageously, the sensor can see surfaces that are covered, concealed or otherwise obscured behind optically opaque materials, including plastic, cloth, foam, paper and other materials. Thus the sensor has a wide variety of applications where conventional vibrometers are not practical.
摘要翻译： 描述了一种用于测量从视野遮蔽的表面的振动的传感器和方法。 传感器包括太赫兹波束的窄带源，分束器，波束组合器和太赫兹检测器。 分束器将太赫兹光束分成用于照射表面的样品光束和参考光束。 光束组合器将从表面散射的样品光束和参考光束组合。 太赫兹检测器基于由于振动表面的组合光束的功率的调制而产生电信号。 电信号表示表面振动的特征。 可以利用零差或外差检测。 有利地，传感器可以看到在光学不透明材料（包括塑料，布，泡沫，纸和其它材料）之后被覆盖，隐藏或以其他方式遮盖的表面。 因此，传感器具有广泛的应用，其中常规的振动计不实用。
-
公开(公告)号：US07187871B1
公开(公告)日：2007-03-06
申请号：US10121947
申请日：2002-04-11
申请人： Sumanth Kaushik
发明人： Sumanth Kaushik
IPC分类号： H04B10/04
CPC分类号： H04B10/54 , H04B10/505 , H04B10/676
摘要： High bandwidth angle modulated communications may be obtained using an incoherent/broadband “white light” source. The light is passed through interferometer arms before and after a communication link. The light is modulated in a transmitter signal optical angle modulator and in a reference optical angle modulator. By locating an interferometer and light source at a receiver, the light passes through the interferometer both before and after the optical link to the transmitter. A balanced detector implements subtraction of non-interfering light.
摘要翻译： 可以使用非相干/宽带“白光”源获得高带宽角调制通信。 在通信链路之前和之后，光通过干涉仪臂。 光在发射机信号光角度调制器和参考光角调制器中调制。 通过将干涉仪和光源放置在接收器处，光线在到达发射器的光链路之前和之后都通过干涉仪。 平衡检测器实现非干扰光的减法。
-
10.发明授权Optical filter including a sub-wavelength periodic structure and method of making 失效包括亚波长周期结构的光学滤波器及其制造方法
公开(公告)号：US5726805A
公开(公告)日：1998-03-10
申请号：US670115
申请日：1996-06-25
申请人： Sumanth Kaushik , Brian R. Stallard
发明人： Sumanth Kaushik , Brian R. Stallard
CPC分类号： G02B5/288 , G01J3/02 , G01J3/0256 , G01J3/51 , G01J3/513 , G02B5/1809 , G01J2003/1213
摘要： An optical filter includes a dielectric layer formed within a resonant optical cavity, with the dielectric layer having formed therein a sub-wavelength periodic structure to define, at least in part, a wavelength for transmission of light through the resonant optical cavity. The sub-wavelength periodic structure can be formed either by removing material from the dielectric layer (e.g. by etching through an electron-beam defined mask), or by altering the composition of the layer (e.g. by ion implantation). Different portions of the dielectric layer can be patterned to form one or more optical interference filter elements having different light transmission wavelengths so that the optical filter can filter incident light according to wavelength and/or polarization. For some embodiments, the optical filter can include a detector element in optical alignment with each optical interference filter element to quantify or measure the filtered light for analysis thereof. The optical filter has applications to spectrometry, colorimetry, and chemical sensing.
摘要翻译： 光学滤波器包括形成在谐振光学腔内的电介质层，其中介电层在其中形成有亚波长周期性结构，以至少部分地限定用于透过谐振光学腔的光的波长。 亚波长周期结构可以通过从电介质层去除材料（例如通过蚀刻通过电子束限定的掩模）或通过改变层的组成（例如通过离子注入）来形成。 可以对电介质层的不同部分进行图案化以形成具有不同透光波长的一个或多个光学干涉滤光器元件，使得滤光器可以根据波长和/或偏振来滤光入射光。 对于一些实施例，光学滤波器可以包括与每个光学干涉滤光器元件光学对准的检测器元件，以量化或测量用于分析的滤光光。 光学滤波器适用于光谱测定，比色法和化学感测。
-
-
-
-
-
-
-
-
-
搜索结果
15 条记录 (耗时 0.023 秒)
