公开(公告)号：US07564562B2

公开(公告)日：2009-07-21

申请号：US11678135

申请日：2007-02-23

Applicant: Han-Sun Choi

Inventor： Han-Sun Choi

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01B9/0209 ,  E21B47/123 ,  G01B9/02044 ,  G01B9/02083 ,  G01B2290/25 ,  G01J3/453

Abstract: A method for demodulating signals from a dispersive, white light interferometer includes generating test interferometry spectra from an interferometer forming part of a sensor for various values of interferometer sensor optical path length. The various test spectra are correlated to a measured spectrum from the sensor to generate a correlation function. The sensor optical path length resulting in the correlation function value reaching a maximum is selected as the optical path length.

Abstract translation: 用于解调来自色散白光干涉仪的信号的方法包括从形成干涉仪传感器光路长度的各种值的传感器的一部分的干涉仪产生测试干涉光谱。 各种测试光谱与来自传感器的测量光谱相关，以产生相关函数。 导致相关函数值达到最大的传感器光路长度被选择为光路长度。

公开(公告)号：US20090180122A1

公开(公告)日：2009-07-16

申请号：US12353742

申请日：2009-01-14

Applicant: John Francis Federici

Inventor： John Francis Federici

IPC: G01J3/45 ,  G01J3/00 ,  G01J5/02

CPC classification number: G01J3/42 ,  G01J3/453 ,  G01N21/3581

Abstract: Methods and apparatus are provided employing rapid scanning continuous wave terahertz spectroscopy and imaging for the non-destructive evaluation of materials such as animal hides and natural cork, and explosive detection, concealed weapon detection, and drug detection. A system employing an aperiodic detector array and implementing phase modulation at 100 kHz significantly reduces the imaging time and enables interferometric images of a THz point source to be obtained at several frequencies between 0.3 and 0.95 THz.

Abstract translation: 提供了使用快速扫描连续波太赫兹光谱法和成像技术对诸如动物皮革和天然软木等材料进行非破坏性评估，爆炸检测，隐蔽武器检测和药物检测的方法和装置。 采用非周期性检测器阵列并以100kHz实现相位调制的系统显着地降低了成像时间，并且能够在0.3至0.95THz之间的几个频率处获得THz点源的干涉图像。

公开(公告)号：US07561274B2

公开(公告)日：2009-07-14

申请号：US11532554

申请日：2006-09-18

Applicant: David J Brady ,  Bob D Guenther ,  Michael E Gehm ,  Scott T McCain

Inventor： David J Brady ,  Bob D Guenther ,  Michael E Gehm ,  Scott T McCain

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01J3/26 ,  G01J3/0208 ,  G01J3/18 ,  G01J3/1838 ,  G01J3/2803

Abstract: An optical spectrometer and/or a method of optical spectroscopy is described herein. One exemplary spectrometer includes a planar spectral filter, a dispersion system, and a detector array having at least two dimensions. The planar spectral filter filters incident light to generate a plurality of wavelength dependent spatial patterns. The dispersion system disperses the spatial patterns along at least one dimension in a wavelength dependent fashion onto the detector array. As a result, spatial patterns corresponding to different wavelengths are centered at different locations on the detector array. The dispersed spatial patterns superimpose at the detector array in an offset but overlapping relationship, creating an asymmetric image that facilitates the spectral analysis of a wide range of light sources, including diffuse or spectrally complex light sources.

Abstract translation: 本文描述了光谱仪和/或光谱法的方法。 一个示例性光谱仪包括平面光谱滤光器，分散系统和具有至少两个维度的检测器阵列。 平面光谱滤波器对入射光进行滤光以产生多个依赖于波长的空间图案。 分散系统将沿着至少一个维度的空间图案以波长依赖的方式分散到检测器阵列上。 结果，对应于不同波长的空间图案集中在检测器阵列上的不同位置。 分散的空间图案以偏移但重叠的关系叠加在检测器阵列处，产生促进宽范围光源（包括漫射或光谱复合光源）的光谱分析的不对称图像。

公开(公告)号：US07538881B2

公开(公告)日：2009-05-26

申请号：US11707550

申请日：2007-02-16

Applicant: Jun Ye ,  Michael J. Thorpe ,  Kevin Moll ,  R. Jason Jones

Inventor： Jun Ye ,  Michael J. Thorpe ,  Kevin Moll ,  R. Jason Jones

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01J3/26 ,  G01N21/3504 ,  G01N21/359 ,  G01N21/39

Abstract: Cavity enhanced spectroscopy efficiently couples a broadband optical frequency comb to a high finesse optical cavity inside which a sample test gas is placed. The output of the optical cavity is a multiplicity of channels of data resulting from the differential absorption of light at various of the comb frequencies. The device can operate in a ringdown mode or a non-ringdown enhanced absorption spectroscopy mode. Careful measurement and control of cavity dispersion and comb spacing are part of the coupling process. Several dispersive detection methods adapted to detecting the multiplicity of channels are provided.

Abstract translation: 腔增强光谱法将宽带光频梳有效地耦合到其中放置样品测试气体的高精细光学腔。 光腔的输出是由各种梳状频率下的光的差分吸收而产生的多个数据通道。 该装置可以在振铃模式或非减振增强吸收光谱模式下工作。 仔细测量和控制腔体分散和梳齿间距是耦合过程的一部分。 提供了适用于检测多个通道的几种色散检测方法。

公开(公告)号：US20090073451A1

公开(公告)日：2009-03-19

申请号：US12292312

申请日：2008-11-17

Applicant: Robert D. TeKolste ,  Alan D. Kathman

Inventor： Robert D. TeKolste ,  Alan D. Kathman

IPC: G01J3/45 ,  G01N21/25

CPC classification number: H01L27/14685 ,  G01J3/18 ,  G01J3/26 ,  G01J3/36 ,  G01J2003/1213

Abstract: A spectrometer for use with a desired wavelength range includes an array of filters. Each filter outputs at least two non-contiguous wavelength peaks within the desired wavelength range. The array of filters is spectrally diverse over the desired wavelength range, and each filter in the array of filters outputs a spectrum of a first resolution. An array of detectors has a detector for receiving an output of a corresponding filter. A processor receives signals from each detector, and outputs a reconstructed spectrum having a second resolution, the second resolution being higher than any of the first resolution of each filter. Filters and detectors may be arranged into a plurality of imaging units, each imaging unit including first and second filters and first and second photosensing regions. A processor receives signals from each imaging unit, and generates a reconstructed spatial image comprised of discrete spatial units corresponding to each imaging unit.

Abstract translation: 用于所需波长范围的光谱仪包括一组滤光片。 每个滤波器在期望的波长范围内输出至少两个不连续的波长峰值。 滤波器阵列在期望的波长范围内是频谱多样的，并且滤波器阵列中的每个滤波器输​​出第一分辨率的光谱。 检测器阵列具有用于接收相应滤波器的输出的检测器。 处理器从每个检测器接收信号，并输出具有第二分辨率的重建频谱，第二分辨率高于每个滤波器的任何第一分辨率。 滤光器和检测器可以被布置成多个成像单元，每个成像单元包括第一和第二滤光器以及第一和第二光敏区域。 处理器从每个成像单元接收信号，并且产生由对应于每个成像单元的离散空间单元组成的重构空间图像。

公开(公告)号：US07502118B2

公开(公告)日：2009-03-10

申请号：US11677185

申请日：2007-02-21

Applicant: Isaac Shpantzer

Inventor： Isaac Shpantzer

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01N21/171 ,  G01J3/02 ,  G01J3/0205 ,  G01J3/0224 ,  G01J3/45 ,  G01J9/04 ,  G01N2021/1793 ,  G02B26/06

Abstract: A photo-thermal interferometric spectroscopy system is disclosed that provides information about a chemical at a remote location. A first light source assembly is included that emits a first beam. The first beam has one or more wavelengths that interact with the chemical and change a refractive index of the chemical. A second laser produces a second beam. The second beam interacts with the chemical resulting in a third beam with a phase change that corresponds with the change of the refractive index of the chemical. A detector system is positioned remote from the chemical to receive at least a portion of the third beam. An adaptive optics system at least partially compensates the light beam degradation caused by atmospheric turbulence. A focusing system is used to bring together the light passed through the chemical; the focusing system includes a multimode fiber for the light collection, The detector system provides information on a phase change in the third beam relative to the second beam that is indicative of at least one of, absorption spectrum and concentration of the chemical.

Abstract translation: 公开了一种在远程位置提供关于化学品的信息的光热干涉光谱系统。 包括发射第一光束的第一光源组件。 第一光束具有与化学物质相互作用并改变化学物质折射率的一种或多种波长。 第二激光器产生第二光束。 第二束与化学物质相互作用，导致具有与化学物质的折射率变化相对应的相变的第三光束。 检测器系统定位成远离化学品以接收第三束的至少一部分。 自适应光学系统至少部分补偿由大气湍流引起的光束退化。 聚焦系统用于将通过化学品的光汇集在一起​​; 聚焦系统包括用于光收集的多模光纤。检测器系统提供关于相对于第二光束的第三光束相变的信息，其指示化学品的吸收光谱和浓度中的至少一个。

公开(公告)号：US20090046293A1

公开(公告)日：2009-02-19

申请号：US11972586

申请日：2008-01-10

Applicant: John Cabaniss ,  Tom Chaffee

Inventor： John Cabaniss ,  Tom Chaffee

IPC: G01J3/45

CPC classification number: G01J9/02 ,  G01J9/04 ,  G01J2009/0207 ,  G01J2009/0234 ,  H04B10/676

Abstract: Optical communications can be performed using spectral interferometry. An incident transmission pulse or beam may be mixed with a locally generated beam or pulse to create an interference pattern that may be analyzed to extract the transmitted data. The incident transmission pulse or beam may also be split and mixed with itself to create an interference pattern.

Abstract translation: 可以使用光谱干涉测量来执行光通信。 入射传输脉冲或光束可以与本地生成的光束或脉冲混合，以产生可被分析以提取发射数据的干涉图案。 入射传输脉冲或光束也可以与其自身分离并混合以产生干涉图案。

公开(公告)号：US20090040520A1

公开(公告)日：2009-02-12

申请号：US12186986

申请日：2008-08-06

Applicant: Takeshi Misawa ,  Shuu Takahashi ,  Mitsuru Iwata ,  Kazuya Oda ,  Motoari Ota ,  Kazuyoshi Ito ,  Yasuyuki Ozeki ,  Yoshitaka Kobayashi

Inventor： Takeshi Misawa ,  Shuu Takahashi ,  Mitsuru Iwata ,  Kazuya Oda ,  Motoari Ota ,  Kazuyoshi Ito ,  Yasuyuki Ozeki ,  Yoshitaka Kobayashi

IPC: G01J3/45

CPC classification number: G01J3/26 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0259 ,  G01J3/04 ,  G02B5/008

Abstract: A spectroscopy device that separates input light into a plurality of wavelength ranges. A metal body has a hole or aperture which is open on the upper side. The hole or aperture is formed in a polygonal shape having at least a pair of opposite faces not parallel to each other in horizontal cross-section. Inner side faces of the hole or aperture are finished as mirror like reflection surfaces. Polarized input light inputted from the opening to the hole or aperture is reflected by the reflection surfaces and a standing wave is generated inside of the hole or aperture by self interference, whereby the input light is separated into a plurality of wavelength ranges.

Abstract translation: 一种将输入光分离为多个波长范围的光谱装置。 金属体具有在上侧开口的孔或孔。 孔或孔形成为具有在水平截面中彼此不平行的至少一对相对面的多边形形状。 孔或孔的内侧面被完成为镜像反射面。 从开口输入到孔或孔的极化输入光被反射面反射，并且通过自身干涉在孔或孔内产生驻波，由此将输入光分离成多个波长范围。

公开(公告)号：US07446878B2

公开(公告)日：2008-11-04

申请号：US11560361

申请日：2006-11-16

Applicant: Trent Ridder ,  Ben ver Steeg ,  John D. Maynard ,  Zachary Benz

Inventor： Trent Ridder ,  Ben ver Steeg ,  John D. Maynard ,  Zachary Benz

IPC: G01B9/02 ,  G01J5/02 ,  G01J3/45

CPC classification number: G01J3/45 ,  G01J3/02 ,  G01J3/027

Abstract: The present invention provides methods and apparatuses that can improve measurement accuracy in interferometers. The invention provides methods for determining digital compensation filters that measure a frequency response or responses to be compensated, and then determining a filter target response from the inverse of the frequency response or responses. A digital compensation filter can be determined from the filter target response using a discrete sum of cosines with a phase argument. The invention also allows other desired filter responses to be integrated into the filter target response before determining the digital compensation filter.

Abstract translation: 本发明提供能够提高干涉仪的测量精度的方法和装置。 本发明提供了用于确定测量要补偿的频率响应或响应的数字补偿滤波器的方法，然后根据频率响应或响应的倒数来确定滤波器目标响应。 可以使用具有相位自变量的离散余弦和的滤波器目标响应来确定数字补偿滤波器。 在确定数字补偿滤波器之前，本发明还允许将其它期望的滤波器响应集成到滤波器目标响应中。

公开(公告)号：US07426035B2

公开(公告)日：2008-09-16

申请号：US11561966

申请日：2006-11-21

Applicant: Isaac Shpantzer

Inventor： Isaac Shpantzer

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01N21/171 ,  G01N21/3504 ,  G01N21/359 ,  G01N21/39 ,  G01N2021/1793

Abstract: A system and method is proposed for chemicals detection such as explosives and others, which are based on sensing of trace gases associated with the chemical. This sensing includes detection of spectrum and relative concentration of the trace gases followed by the chemical identification based on these data. The sensing is based on photothermal interferometry method modified by implementation of coherent optical detection. This modification essentially improves the device performance by increasing its sensitivity and selectivity. Improved characteristics of the device allow remote sensing of the interrogated chemicals at a distance up to 1000 meters, which is crucial for explosives detection. The coherent optical detection is performed by a coherent receiver based on 90-degrees optical hybrid.

Abstract translation: 提出了一种用于化学物质检测的系统和方法，例如爆炸物等，其基于与化学品相关的痕量气体的检测。 该检测包括基于这些数据检测光谱和痕量气体的相对浓度，然后进行化学鉴定。 该感测是基于相干光学检测实现修改的光热干涉法。 该修改通过增加其灵敏度和选择性来实质地改善器件性能。 改进的设备特性允许远程检测被询问的化学品，距离高达1000米，这对于爆炸物检测至关重要。 相干光学检测由基于90度光学混合的相干接收机执行。