公开(公告)号：US06358748B1

公开(公告)日：2002-03-19

申请号：US09677611

申请日：2000-09-28

Applicant: Jonathan D. Weiss

Inventor： Jonathan D. Weiss

IPC: G01N2164

CPC classification number: G01N21/645 ,  G01N21/7703 ,  G01N2021/7709 ,  G01N2021/7786 ,  G01N2201/088

Abstract: A microbend fiber-optic chemical sensor for detecting chemicals in a sample, and a method for its use, is disclosed. The sensor comprises at least one optical fiber having a microbend section (a section of small undulations in its axis), for transmitting and receiving light. In transmission, light guided through the microbend section scatters out of the fiber core and interacts, either directly or indirectly, with the chemical in the sample, inducing fluorescence radiation. Fluorescence radiation is scattered back into the microbend section and returned to an optical detector for determining characteristics of the fluorescence radiation quantifying the presence of a specific chemical.

Abstract translation: 公开了一种用于检测样品中的化学物质的微弯纤维化学传感器及其使用方法。 该传感器包括至少一个光纤，其具有微弯曲部分（在其轴上具有小的起伏部分），用于发射和接收光。 在透射中，引导穿过微弯曲部分的光从纤维芯中散射出来，直接或间接地与样品中的化学物质相互作用，从而诱导荧光辐射。 荧光辐射被散射回微弯曲部分并返回到光学检测器，以确定定量特定化学物质存在的荧光辐射的特性。

公开(公告)号：US6115528A

公开(公告)日：2000-09-05

申请号：US157266

申请日：1998-09-21

Applicant: John E. Schmucker ,  Jon C. Falk ,  William B. Archer ,  Raymond J. Blasi

Inventor： John E. Schmucker ,  Jon C. Falk ,  William B. Archer ,  Raymond J. Blasi

IPC: G02B6/36

CPC classification number: G01N21/59 ,  G01N21/01 ,  G01N2201/088 ,  G02B6/4428

Abstract: This invention provides a device for Raman spectroscopic measurement of composition and concentrations in a hostile environment by the use of a first fiber optic as a means of directing high intensity monochromatic light from a laser to the hostile environment and a second fiber optic to receive the lower intensity scattered light for transmittal to a monochromator for analysis. To avoid damage to the fiber optics, they are protected from the hostile environment. A preferred embodiment of the Raman fiber optic probe is able to obtain Raman spectra of corrosive gases and solutions at temperatures up to 600.degree. F. and pressures up to 2000 psi. The incident exciting fiber optic cable makes an angle of substantially 90.degree. with the collecting fiber optic cable. This 90.degree. geometry minimizes the Rayleigh scattering signal picked up by the collecting fiber, because the intensity of Rayleigh scattering is lowest in the direction perpendicular to the beam path of the exciting light and therefore a 90.degree. scattering geometry optimizes the signal to noise ratio.

Abstract translation: 本发明提供了一种用于拉曼光谱测量在恶劣环境中的组成和浓度的装置，其通过使用第一光纤作为将来自激光的高强度单色光引导到敌对环境的手段，以及第二光纤以接收较低的 强度散射光传输到单色仪进行分析。 为了避免损坏光纤，它们可以免受恶劣环境的影响。 拉曼光纤探头的一个优选实施例能够在高达600°F的温度下获得腐蚀性气体和溶液的拉曼光谱，压力高达2000psi。 事件激发的光纤电缆与收集光纤电缆成大致90度的角度。 由于瑞利散射的强度在垂直于激发光束的光束路径的方向上最低，因此该90°几何最小化由收集光纤拾取的瑞利散射信号，因此90°散射几何优化信噪比。

公开(公告)号：US20240219295A1

公开(公告)日：2024-07-04

申请号：US18555438

申请日：2022-04-11

Applicant: NKT Photonics A/S

Inventor： Peter Moselund ,  Rasmus Engelsholm ,  Erik Nicolai Christensen

IPC: G01N21/17 ,  G02F1/365

CPC classification number: G01N21/1702 ,  G02F1/365 ,  G01N2021/1706 ,  G01N2201/06113 ,  G01N2201/088

Abstract: Disclosed is an optical system for monitoring a parameter, such as a density or a pressure, of a fluid, in particular a gas or a mixture of gases, in a hollow core of an optical fiber, wherein the optical system comprises: an optical fiber which comprises a hollow core that is filled with a fluid, a pulsed laser for providing pulsed laser light, which is input into a first end of the optical fiber such that the laser light propagates through the hollow core from the first end to a second end of the fiber, wherein the pulsed laser light is configured to induce nonlinear processes by interacting with the fluid in the hollow core, and wherein the optical system further comprises a monitoring device for detecting acoustic vibrations in the fiber and for determining a parameter of the fluid based on the acoustic vibrations.

公开(公告)号：US20240142384A1

公开(公告)日：2024-05-02

申请号：US18493952

申请日：2023-10-25

Applicant: Exner & Tottewitz Besitz GbR

Inventor： Michael Tottewitz ,  Detlef Exner ,  Gabriel Cremers ,  Yasar Güney

IPC: G01N21/85

CPC classification number: G01N21/8507 ,  G01N2201/086 ,  G01N2201/088

Abstract: A sensor positioning device, having a holding module, with a sensor receptacle, fastening element and spring element, the sensor receptacle being mounted movably relative to the fastening element along a compensating axis. The spring is arranged between the fastening element and the sensor receptacle to cooperate therewith, to create a restoring force during movement of the receptacle relative to the fastening element. A measurement connector with an abutment is configured for arrangement onto a process container, and is configured for releasable arrangement on the holding module. The sensor positioning device is configured such that, when the measurement connector is arranged on the holding module, the sensor receptacle is movable relative to the fastening element along the axis, and a pressing force of the sensor receptacle onto the abutment of the measurement connector is created by the spring. A sensor unit, for turbidity measurement, is provided having the sensor positioning device.

公开(公告)号：US20230333024A1

公开(公告)日：2023-10-19

申请号：US18302209

申请日：2023-04-18

Applicant: The United States Department of Energy

Inventor： Ruishu F. Wright ,  Nathan Diemler ,  Nageswara R. Lalam ,  Jagannath Devkota ,  Paul R. Ohodnicki, JR.

IPC: G01N21/77 ,  F17D5/00

CPC classification number: G01N21/7703 ,  F17D5/005 ,  G01N2021/7773 ,  G01N2201/084 ,  G01N2201/088

Abstract: One or more embodiments relate to a sensor configuration system comprising at least one device configured to sense a first parameter; at least one device configured to sense a second parameter, and at least one interrogator device. The at least one device configured to sense the second parameter interfaces with the at least one device configured to sense the first parameter, and the at least one interrogator device interfaces both the at least one device configured to sense the first parameter and the at least one device configured to sense the second parameter where the at least one interrogator device spatially interrogates both the at least one device configured to sense the first parameter and the at least one device configured to sense the second parameter.

公开(公告)号：US11650153B2

公开(公告)日：2023-05-16

申请号：US16300696

申请日：2017-05-12

Applicant: MAXWELLIAN INC.

Inventor： Alireza Hassani

IPC: G01N21/552

CPC classification number: G01N21/554 ,  G01N2201/088

Abstract: Plasmonic optical fibers, plasmonic optical sensors and methods of manufacturing the same. A fiber core conveys an optical signal therewithin and provides a plasmonic sensing area exposed to a fluid. The plasmonic sensing area is formed only on a section of an external surface of the fiber core. The plasmonic sensing area provides an interface within the section of the external surface for the conveyed signal to at least partially exit the fiber core and cause a modified optical signal to be conveyed in the fiber core. An optical signal generator may provide the optical signal to the plasmonic optical fiber, an optical signal receiver may discriminate the conveyed optical signal from the modified optical signal and a processor module may analyze the modified optical signal and identifies physical characteristics of the fluid present at the sensing area.

公开(公告)号：US09983121B2

公开(公告)日：2018-05-29

申请号：US14693947

申请日：2015-04-23

Applicant: FAZ TECHNOLOGY LIMITED

Inventor： Douglas O. Carlson

IPC: G01N21/00 ,  G01N21/25 ,  G01D5/353 ,  G01M11/00

CPC classification number: G01N21/255 ,  G01D5/35316 ,  G01D5/35396 ,  G01M11/31 ,  G01N2201/0612 ,  G01N2201/088

Abstract: A device and method for tracking a spectral response. The device and method including inputting light to a waveguide medium having a plurality of perturbation sensors disposed in a spaced relationship in the waveguide medium; receiving a plurality of signals reflected from the plurality of perturbation sensors; retrieving from the received signals, data representing a plurality of signal values, each signal value comprising at least a magnitude value and a wavelength value; identifying within the plurality of signal values, at least a first signal value and a second signal value, being in an overlap state; estimating, for at least some of the plurality of perturbation sensors, an expected signal value; associating each expected signal value with a respective signal value from the plurality of signal values; updating each expected signal value with the associated signal value.

公开(公告)号：US20180143133A1

公开(公告)日：2018-05-24

申请号：US15574732

申请日：2016-05-16

Applicant: INL-International lberian Nanotechnology Laboratory

Inventor： Diana Viegas ,  Raquel Queirós ,  Jana Nieder ,  Maria Teresa Férnandez ,  Begoña Espiña ,  Paolo Freitas ,  Lars Montelius

IPC: G01N21/552 ,  G01N21/65 ,  G01N21/77

CPC classification number: G01N21/554 ,  G01N21/553 ,  G01N21/658 ,  G01N21/7703 ,  G01N2021/7716 ,  G01N2201/088 ,  G01N2201/0886

Abstract: The present invention relates to an optical fibre for use in a system for detection of one or more compounds in a fluid. The optical fibre (100, 101, 202) comprising at least two binding portions (102, 104, 118, 210, 211, 212) separated from each other along the longitudinal direction (106) of the optical fibre (100, 101, 202), wherein each of the at least two binding portions (102, 104, 118, 210, 211, 212) comprises a plasmonic structure (120) and/or a SERS structure (121), and a binding material (126) for binding of one or more compounds, wherein at least two binding portions (102, 104, 118, 210, 211, 212) are arranged for binding the same compound or compounds, wherein the optical fibre (100, 101, 202) is arranged for receiving light and transmitting light to each of the at least two binding portions, wherein each of the at least two binding portions (102, 104, 118, 210, 211, 212) is arranged such that light transmitted through that binding portion (102, 104, 118, 210, 211, 212) without bound compound is different compared to light transmitted through that binding portion (102, 104, 118, 210, 211, 212) with bound compound, or light reflected back from that binding portion (102, 104, 118, 210, 211, 212) without bound compound is different compared to light reflected back from that binding portion (102, 104, 118, 210, 211, 212) with bound compound. The present invention further relates to a system (200) for detection of one or more compounds in a fluid (103) and an optical fibre (100, 101, 202) for use in such a system (200) and a method (400) using the system (200).

公开(公告)号：US09915602B2

公开(公告)日：2018-03-13

申请号：US14619166

申请日：2015-02-11

Applicant: MOCON, INC.

Inventor： John Eastman

IPC: G01N21/27 ,  G01N21/64 ,  G01N21/77

CPC classification number: G01N21/278 ,  G01N21/643 ,  G01N21/6486 ,  G01N21/77 ,  G01N2021/6432 ,  G01N2201/088

Abstract: A calibration tool and method of using the tool to calibrate a fiber optic needle oxygen sensor. The tool includes at least a vial sealingly covered by a septa and containing a supply of particulate oxygen getter within the chamber of the vial. The vial has an open top and is constructed from an oxygen impermeable material. The septa is resealing, needle-penetrable and oxygen impermeable. The supply of particulate oxygen getter is retained within an oxygen permeable sachet.

公开(公告)号：US20170307524A1

公开(公告)日：2017-10-26

申请号：US15493589

申请日：2017-04-21

Applicant: Commissariat à l'ènergie atomique et aux énergies alternatives ,  Centre National De la Recherche Scientifique ,  Universite Pierre et Marie Curie (Paris 6)

Inventor： Veronica SORGATO ,  Michel Berger ,  Anne Planat-Chretien ,  Christine Vever-Bizet ,  Genevieve Bourg-Heckly ,  Charlotte Emain

IPC: G01N21/47 ,  G01N33/483

CPC classification number: G01N21/474 ,  G01N21/4738 ,  G01N21/4795 ,  G01N33/4833 ,  G01N2021/4709 ,  G01N2021/4742 ,  G01N2021/4773 ,  G01N2201/088

Abstract: A method and a device allow optical properties of a sample to be estimated. The method includes the illumination of the sample by a first light source, and the formation of an image of the sample thus illuminated, on the basis of which a first optical property is estimated, at various points on a surface of the sample. The method also includes measuring an auxiliary optical property of the sample and estimating the first optical property, taking account of the auxiliary optical property measured on the sample.