公开(公告)号：US20170336259A1

公开(公告)日：2017-11-23

申请号：US15597329

申请日：2017-05-17

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi KAWADA

IPC: G01J3/14 ,  G01N21/25 ,  G01J3/447

CPC classification number: G01J3/14 ,  G01J3/0224 ,  G01J3/28 ,  G01J3/42 ,  G01J3/447 ,  G01J2001/4242 ,  G01N21/255 ,  G01N21/3581 ,  G01N21/552

Abstract: A total reflection spectroscopic measurement device includes a terahertz wave generation unit, an internal total reflection prism, a detection unit configured to detect the terahertz wave, an electric field vector measurement unit configured to measure an electric field vector of the terahertz wave, and an analysis unit configured to acquire information about an optical constant of the object to be measured. Proportions of S polarization component and P polarization component of the terahertz wave are constant. The analysis unit acquires the information about the optical constant on the basis of a ratio between S polarization component and P polarization component of the measured electric field vector when the object is not arranged on the total reflection surface and a ratio between S polarization component and P polarization component of the measured electric field vector when the object is arranged on the total reflection surface.

公开(公告)号：US20170336255A1

公开(公告)日：2017-11-23

申请号：US15598152

申请日：2017-05-17

Applicant: University of Maribor

Inventor： Denis Donlagic ,  Simon Pevec

IPC: G01J3/02 ,  G01J3/28 ,  G01J3/10 ,  G01J3/42 ,  G01J3/32 ,  G01J3/26 ,  G01L9/00 ,  G01J3/427

CPC classification number: G01J3/0218 ,  G01B2290/25 ,  G01J3/0208 ,  G01J3/0224 ,  G01J3/0237 ,  G01J3/0289 ,  G01J3/10 ,  G01J3/26 ,  G01J3/28 ,  G01J3/2803 ,  G01J3/32 ,  G01J3/42 ,  G01J3/427 ,  G01J2003/102 ,  G01J2003/104 ,  G01L9/0079

Abstract: An optical system having an optical sensor with an ultra-short FP cavity, and a low-resolution optical interrogation system coupled to the optical sensor and operational to send light signals and receive light signals to and from the optical sensor is disclosed. The optical system may operate in a wavelength range including the visible and near-infrared range. Optical assemblies and methods of interrogating optical sensors are provided, as are numerous other aspects.

公开(公告)号：US09823185B1

公开(公告)日：2017-11-21

申请号：US15644775

申请日：2017-07-08

Applicant: Airware, Inc.

Inventor： Jacob Y Wong ,  Thomas Campbell

IPC: G01N21/3504

CPC classification number: G01N21/3504 ,  G01J3/10 ,  G01J3/42 ,  G01J3/427 ,  G01N21/3151 ,  G01N21/3577 ,  G01N21/61 ,  G01N33/49 ,  G01N2021/3159 ,  G01N2201/0696

Abstract: For determining concentration of a targeted molecule M in a liquid sample admixed with interfering molecules MJ which overlap its absorption band, a NDIR reflection sampling technique is used. Besides the signal source, a reference and an interference source are added. M is calculated by electronics which use Rave(t) from a pulsed signal and reference channel output and a calibration curve which is validated by use of RJava(t2) from a pulsed interference and reference channel output. Signal, interference and reference sources are pulsed at a frequency which is sufficiently fast so that a given molecule of M or MJ will not pass in and out of the liquid sampling matrix within the pulsing frequency.

公开(公告)号：US20170329127A1

公开(公告)日：2017-11-16

申请号：US15589936

申请日：2017-05-08

Applicant: The Chinese University of Hong Kong

Inventor： Xudong Liu ,  Zefeng Chen ,  Edward Philip John Parrott ,  Benjamin Ung ,  Jianbin Xu ,  Emma MacPherson

IPC: G02B26/08 ,  G02F1/315 ,  G02F1/01 ,  G01N21/3581 ,  G01J5/08 ,  H01Q15/00 ,  G01J3/42

CPC classification number: G02B26/0816 ,  G01J3/42 ,  G01J5/08 ,  G01N21/3581 ,  G02F1/01 ,  G02F1/315 ,  H01Q15/0006

Abstract: A light modulator (e.g., for terahertz radiation) may be constructed using a prism in which light undergoes total internal reflection (TIR) at one surface. A tunable conductive layer is disposed on the TIR surface. The tunable conductive layer can have a conductivity that is dynamically controllable, e.g., by applying a voltage across the tunable conductive layer or by optically pumping the tunable conductive layer. The tunable conductive layer can absorb a portion of the reflected light beam, attenuating the beam, with the attenuation being a function of the electrical conductivity of the tunable conductive layer. The phase of the reflected light beam can also be altered as a function of electrical conductivity of the tunable conductive layer.

公开(公告)号：US09816860B2

公开(公告)日：2017-11-14

申请号：US14466819

申请日：2014-08-22

Applicant: SpectraSensors, Inc.

Inventor： Alfred Feitisch ,  Xiang Liu ,  Keith Benjamin Helbley ,  Douglas Beyer

IPC: G01J3/28 ,  G01J3/02 ,  G01J3/42 ,  G01N21/31

CPC classification number: G01J3/0205 ,  G01J3/0237 ,  G01J3/027 ,  G01J3/0278 ,  G01J3/0291 ,  G01J3/42 ,  G01J2003/421 ,  G01N21/31 ,  G01N2201/06113 ,  G01N2201/062

Abstract: A spectrometer includes a light source that emits a beam into a sample volume comprising an absorbing medium. Thereafter, at least one detector detects at least a portion of the beam emitted by the light source. It is later determined, based on the detected at least a portion of the beam and by a controller, that a position and/or an angle of the beam should be changed. The beam emitted by the light source is then actively steered by an actuation element under control of the controller. In addition, a concentration of the absorbing media can be quantified or otherwise calculated (using the controller or optionally a different processor that can be local or remote). The actuation element(s) can be coupled to one or more of the light source, a detector or detectors, and a reflector or reflectors intermediate the light source and the detector(s).

公开(公告)号：US20170322149A1

公开(公告)日：2017-11-09

申请号：US15525338

申请日：2015-11-02

Applicant: Dräger Safety AG & Co. KGaA

Inventor： Andre PAPE ,  Arne TRÖLLSCH

IPC: G01N21/3504 ,  G01J3/42 ,  G01N21/17 ,  G01N21/31

CPC classification number: G01N21/3504 ,  G01J3/42 ,  G01N21/1702 ,  G01N21/31

Abstract: An optical gas sensor (1), for quantitatively measuring a concentration of one or more gases, includes a radiation source (2) for emitting light waves (L), a cuvette (3) for holding a gas (G) to be measured, and a detector (4) for measuring light intensities. The light source (2) includes at least one emitter (5) of light waves (L) and is configured to emit light waves (L) of at least one first wavelength and of a second wavelength different from the first wavelength simultaneously or separately from each other. The emitter (5) is further configured to emit a spectrum the full half-life width of which is a maximum 50% of the effective wavelength, and to emit light waves (L) having a controlled beam path. The detector (4) is configured to quantitatively detect an intensity of emitted light waves (L) of the first wavelength and of the second wavelength.

公开(公告)号：US20170322080A1

公开(公告)日：2017-11-09

申请号：US15533670

申请日：2015-12-18

Applicant: GE HEALTHCARE BIO-SCIENCES AB

Inventor： Hanno Ehring ,  Siavash Yazdanfar ,  Mikael Anders Hornqvist ,  Zhangyi Zhong ,  Ying Mao

IPC: G01J3/02 ,  G01J3/42 ,  G01N30/74 ,  G02B6/36 ,  G02B6/14 ,  G01N30/02

CPC classification number: G02B6/14 ,  G01J3/0218 ,  G01J3/42 ,  G01N30/74 ,  G01N2030/027 ,  G02B6/0006 ,  G02B6/0008 ,  G02B6/3628

Abstract: Disclosed is an optical fiber arrangement for inducing coupling among propagation modes of light, said arrangement comprising a multimode optical fiber (30) having an input end (32) for receiving light and an output end (31) for emitting light, with a coupling inducing section (33) extending from said input end to said output end, and a holder (80) on which the optical fiber is arranged, wherein said multimode optical fiber has a non-circular cross section. Disclosed also is a system for measuring the absorption or determining the concentration of a substance, said system comprising at least one optical fiber arrangement.

公开(公告)号：US09810578B2

公开(公告)日：2017-11-07

申请号：US15061308

申请日：2016-03-04

Applicant: Brandt Christopher Pein ,  Harold Young Hwang ,  Wendi Chang ,  Keith A. Nelson ,  Vladimir Bulovic ,  Nathaniel C. Brandt

Inventor： Brandt Christopher Pein ,  Harold Young Hwang ,  Wendi Chang ,  Keith A. Nelson ,  Vladimir Bulovic ,  Nathaniel C. Brandt

IPC: G01J1/42 ,  G01J1/58 ,  G01J5/04 ,  G01J3/02 ,  G01J5/08 ,  G01J3/04 ,  G01J3/42

CPC classification number: G01J5/046 ,  G01J1/58 ,  G01J3/0216 ,  G01J3/0245 ,  G01J3/04 ,  G01J3/42 ,  G01J5/0815 ,  G01J5/0837

Abstract: A radiation detection technique employs field enhancing structures and electroluminescent materials to converts incident Terahertz (THz) radiation into visible light and/or infrared light. In this technique, the field-enhancing structures, such as split ring resonators or micro-slits, enhances the electric field of incoming THz light within a local area, where the electroluminescent material is applied. The enhanced electric field then induces the electroluminescent material to emit visible and/or infrared light via electroluminescent process. A detector such as avalanche photodiode can detect and measure the emitted light. This technique allows cost-effective detection of THz radiation at room temperatures.

公开(公告)号：US09778110B1

公开(公告)日：2017-10-03

申请号：US14690318

申请日：2015-04-17

Applicant: Picarro Inc.

Inventor： Chris W. Rella ,  Sze M. Tan ,  Yonggang He

IPC: G01J3/42 ,  G01J3/12 ,  G01J3/06 ,  G01J3/02 ,  G01J3/28

CPC classification number: G01J3/42 ,  G01J3/0275 ,  G01J3/06 ,  G01J3/10 ,  G01J3/28 ,  G01J2003/2853 ,  G01J2003/2859 ,  G01J2003/2866 ,  G01J2003/423

Abstract: Described self-referencing cavity enhanced spectroscopy (SRCES) systems and methods are tailored to acquiring spectra in a middle regime, in which signals are lower than optimal for conventional absorption spectroscopy, and absorption is higher than optimal for cavity ring-down spectroscopy (CRDS). Longitudinal mode resonance spectral peaks are analyzed individually to extract intensity ratios (e.g. maximum to minimum) and/or curve-fitting parameters, obviating the need to measure or precisely control the input light intensity.

公开(公告)号：US09772227B2

公开(公告)日：2017-09-26

申请号：US14864613

申请日：2015-09-24

Applicant: California Institute of Technology

Inventor： David C. Scott ,  Alexander Ksendzov ,  Warren P. George ,  James A. Smith ,  Abdullah S. Aljabri ,  Joel M. Steinkraus ,  Rudi M. Bendig ,  Douglas C. Hofmann

IPC: G01N21/00 ,  G01J3/02 ,  G01J3/42

CPC classification number: G01J3/0291 ,  G01J3/021 ,  G01J3/0256 ,  G01J3/42 ,  G01J2003/423 ,  G01N21/00

Abstract: A portable spectrometer, including a smart phone case storing a portable spectrometer, wherein the portable spectrometer includes a cavity; a source for emitting electromagnetic radiation that is directed on a sample in the cavity, wherein the electromagnetic radiation is reflected within the cavity to form multiple passes of the electromagnetic radiation through the sample; a detector for detecting the electromagnetic radiation after the electromagnetic radiation has made the multiple passes through the sample in the cavity, the detector outputting a signal in response to the detecting; and a device for communicating the signal to a smart phone, wherein the smart phone executes an application that performs a spectral analysis of the signal.