公开(公告)号：US10027425B2

公开(公告)日：2018-07-17

申请号：US15319364

申请日：2015-06-16

Applicant: ETH Zürich

Inventor： Andreas Hugi ,  Gustavo Filipe Ferreira Villares ,  Jérôme Faist

IPC: H04B10/04 ,  H04B10/64 ,  G01J3/433 ,  G01J9/02 ,  H04B10/50 ,  H04B10/524 ,  G01J3/42

Abstract: A method for optical and electrical signal processing of a multi-heterodyne signal generated by a multi-mode semi-conductor laser, for a system comprising two laser sources and an sample interaction unit. At least the beam of one of the laser passes through said sample interaction unit before being combined on a detector. The first laser is tuned (40=>42) by an amount keeping the tuning result within the available detector bandwidth (55). Then the second laser is roughly tuned by the same amount as the tuning of the first laser to bring back the signal to the vicinity (48) of the original place in the RF-domain and within the bandwidth (55) of the detector. The tuning steps are repeated with different value of mode spacing for reconstructing the sample spectrum and provide a high resolution image of the dip (41) absorption line (40).

公开(公告)号：US10012540B2

公开(公告)日：2018-07-03

申请号：US15314001

申请日：2015-05-01

Applicant: GHGSat Inc.

Inventor： James J. Sloan ,  Berké Durak ,  David Gains ,  Francesco Ricci ,  Jason McKeever ,  Joshua Lamorie ,  Mark Sdao ,  Vincent Latendresse ,  Jonathan Lavoie ,  Roman Kruzelecky

IPC: G01J3/26 ,  G01J3/28 ,  G01J3/42 ,  G02F1/21 ,  G01N21/17 ,  G01N21/3504

CPC classification number: G01J3/26 ,  G01J3/28 ,  G01J3/2823 ,  G01J3/42 ,  G01N2021/1793 ,  G01N2021/3531 ,  G02F2001/213

Abstract: Systems, methods, and devices relating to optical imaging systems for gathering data on atmospheric trace gas emissions from a satellite. An optical system used in the satellite has a Fabry-Perot interferometer coupled to a suitable telescope. The interferometer is a wide angle Fabry-Perot interferometer which creates a fringing pattern in concentric circles with each fringe being a different wavelength on the imaging system. A filter is used with the optical system and allows multiple adjacent modes in a selected spectral range to pass through the interferometer to the imaging system. Each pixel in the imaging system collects light at multiple wavelengths within the selected spectral range. The optical system gathers multiple images of the target area allowing light from the target area to be collected at multiple different wavelengths. Different absorption data for different atmospheric trace gases can be gathered in a single satellite pass over the target area.

公开(公告)号：US20180172580A1

公开(公告)日：2018-06-21

申请号：US15735526

申请日：2016-06-10

Applicant: NEO MONITOR AS

Inventor： Ove BJORØY

IPC: G01N21/39 ,  G01J3/42 ,  G01J3/02 ,  G01J3/10

Abstract: Gas monitor based on tuneable diode laser spectroscopy comprising at least one light source (1000) matched to at least one target gas (5000) and at least one light sensitive detector (3000), and optical means (2000; 2200) to form light beams and direct light beams through the target gas to be analysed as well as directing the light onto at least one detector (3000). The optical means comprise a retro reflector (2200) and a mirror arrangement comprising a central mirror (2100) and a surrounding mirror (2300) arranged with an offset angle between their optical axes, the central mirror (2100) being arranged for receiving light from the light source (1000) and directing light to the retro reflector (2200), the retro reflector (2200) arranged for returning the light to the surrounding mirror (2300), and the surrounding mirror (2300) arranged for reflecting the light into the detector (3000). The gas monitor also comprises a control system controlling light sources, digitising analogue signals as well as determining characteristics of the gas. The gas monitor further comprises internal alignment means for fine alignment. The gas monitor can comprise two or more light sources (1000, 1100, 1200) targeting gases with absorption lines in two or more wavelength ranges. The gas monitor can in certain embodiments comprise one or more gas cells (2910, 2920) that can be inserted in an optical path to verify the performance of the instrument.

公开(公告)号：US20180171157A1

公开(公告)日：2018-06-21

申请号：US15578367

申请日：2016-06-03

Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. ,  SHARKLET TECHNOLOGIES, INC.

Inventor： Chelsea Marie MAGIN ,  Shravanthi T. REDDY ,  Anthony B. BRENNAN

IPC: C09D5/16 ,  G01J3/42 ,  C03C3/078 ,  C08L87/00 ,  C08L57/00

CPC classification number: C09D5/1637 ,  B08B17/065 ,  C03C3/078 ,  C08L57/00 ,  C08L83/04 ,  C08L87/00 ,  C09D5/1618 ,  G01J3/42

Abstract: An article has a surface topography for resisting bioadhesion of organisms and includes a base article having a surface. A composition of the surface includes a polymer. The surface has a topography comprising a pattern defined by a plurality of spaced apart features attached to or projected into the base article. The plurality of features each have at least one microscale dimension and at least one neighboring feature having a substantially different geometry, wherein neighboring patterns share a common feature. The surface has an optical transmission at 400 nm to 700 nm of equal to or greater than 70%. In one embodiment, the surface can comprise a coating layer disposed on the base article.

公开(公告)号：US09945787B2

公开(公告)日：2018-04-17

申请号：US13737523

申请日：2013-01-09

Applicant: Roche Diagnostics Operations, Inc.

Inventor： Rik Harbers ,  Kurt Schildknecht

IPC: G01N21/00 ,  G01N21/75 ,  G01J3/28 ,  G01J3/42 ,  G01N21/25

CPC classification number: G01N21/75 ,  G01J3/28 ,  G01J3/42 ,  G01N21/255

Abstract: An optical device for determining the presence and/or concentration of analytes in a sample is presented. The optical device comprises a detector and a detection unit comprising optical path components. The detection unit has wavelength-dependent responsivity. The optical device further comprises a light source for emitting light of different respective usable wavelength ranges. The light is guidable through the optical path to the detector to generate baseline signals and response signals relative to the baseline signal indicative of the presence and/or concentration of analytes in the optical path. The intensity of the light reaching the detector is adjusted inverse to the wavelength-dependent responsivity with respect to at least two respective usable wavelength ranges so that a reduction of the ratio between the maximum baseline signal at one of the selected usable wavelength ranges and the minimum baseline signal at another of the selected usable wavelength ranges is obtained.

公开(公告)号：US20180100767A1

公开(公告)日：2018-04-12

申请号：US15805278

申请日：2017-11-07

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

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

IPC: G01J5/04 ,  G01J1/58 ,  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：US20180088316A1

公开(公告)日：2018-03-29

申请号：US15819227

申请日：2017-11-21

Applicant: Seiko Epson Corporation

Inventor： Tomonori Matsushita ,  Nozomu Hirokubo

IPC: G02B26/00 ,  G01J3/02 ,  G01J3/50 ,  G01J3/42 ,  G01J3/32 ,  G01J3/28 ,  G01J3/06 ,  G01J3/26 ,  G01J3/10

Abstract: An optical module includes a wavelength variable interference filter having a fixed reflective film, a movable reflective film which faces the fixed reflective film with a gap between reflective films interposed therebetween, and an electrostatic actuator that changes the gap between reflective films, and a gap control unit that controls the electrostatic actuator. The gap control unit controls the electrostatic actuator on the basis of an order which is set in accordance with a wavelength to be measured, and changes the gap between the reflective films.

公开(公告)号：US09921196B2

公开(公告)日：2018-03-20

申请号：US14128920

申请日：2012-06-26

Applicant: Piotr Strauch

Inventor： Piotr Strauch

IPC: G01N30/74 ,  G01N21/39 ,  G01J3/42 ,  G01N21/3504

CPC classification number: G01N30/74 ,  G01J3/42 ,  G01N21/3504 ,  G01N21/39

Abstract: A method in which a sample of a gas mixture to be analyzed via gas chromatography is conducted through a chromatographic separating device via a carrier gas, separated components of the gas mixture are subsequently quantitatively determined in an absorption spectrometer having a wavelength-adaptable light source, and in order to increase the speed of analysis and to be able to also determine components that cannot be measured via absorption spectroscopy, the wavelength of the light source can be adapted to an absorption line of the carrier gas, where the individual components of the gas mixture are determined indirectly via a concentration reduction of the carrier gas.

公开(公告)号：US09915562B2

公开(公告)日：2018-03-13

申请号：US15235401

申请日：2016-08-12

Applicant: ABB, Inc.

Inventor： John Brian Leen ,  Nathan E. Bramall

IPC: G01J5/02 ,  G01J3/02 ,  G01J3/42 ,  G01N21/3504

CPC classification number: G01J3/021 ,  G01J3/0208 ,  G01J3/0243 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/42 ,  G01N21/3504 ,  G01N21/39 ,  G01N2021/391 ,  G01N2021/399 ,  G01N2201/06113

Abstract: A cavity-enhanced absorption spectroscopy instrument has an optical cavity with two or more cavity mirrors, one mirror of which having a hole or other aperture for injecting a light beam, and the same or another mirror of which being partially transmissive to allow exit of light to a detector. A spherical-spherical configuration with at least one astigmatic mirror or a spherical-cylindrical configuration where the spherical mirror could also be astigmatic prevents a reentrant condition wherein the injected beam would prematurely exit the cavity through the aperture. This combination substantially increases the number of passes of the injected beam through a sample volume for sensitive detection of chemical species even in less than ideal conditions including low power laser or LED sources, poor mirror reflectivity or detector noise at the wavelengths of interest, or cavity alignment issues such as vibration or temperature and pressure changes.

公开(公告)号：US20180031423A1

公开(公告)日：2018-02-01

申请号：US15550006

申请日：2015-02-09

Applicant: Shimadzu Corporation

Inventor： Masahide GUNJI ,  Akira NODA ,  Kensuke OTAKE

IPC: G01J3/36 ,  G01J3/28 ,  G01J3/42 ,  G01J3/12

CPC classification number: G01J3/36 ,  G01J3/12 ,  G01J3/28 ,  G01J3/2803 ,  G01J3/42

Abstract: A problem addressed by the present invention is to reduce the influence of stray light incident on each light-receiving element in the case of receiving each wavelength of light using a plurality of light-receiving elements. The multichannel spectrophotometer according to the present invention is a detector for simultaneously detecting the entirety of wavelength-dispersed light obtained by introducing light from a sample to a light-dispersing element (16) and dispersing this light into wavelengths by the light-dispersing element (16), including: a multichannel-type detector (17) including a plurality of light-receiving elements arranged in a one-dimensional form in a wavelength-dispersing direction of the light-dispersing element; a light amount calculator (221) for calculating the amount of light from a detection signal of each of the plurality of light-receiving elements (PD); a spectrum creator (222) for creating, from the amounts of light calculated by the light amount calculator (221), a spectrum showing a relationship between wavelength and the amount of light; and a computing section (224) for estimating, from the spectrum, the amount of stray light incident on each light-receiving element (PD) and correcting the spectrum by subtracting, from the amount of wavelength-dispersed light incident on each light-receiving element, the amount of stray light.