公开(公告)号：US20160139036A1

公开(公告)日：2016-05-19

申请号：US15005375

申请日：2016-01-25

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： François BABIN

IPC: G01N21/25 ,  G01N21/27

CPC classification number: G01N21/255 ,  G01N21/27 ,  G01N21/274 ,  G01N21/65 ,  G01N21/7703 ,  G01N21/78 ,  G01N21/80 ,  G01N2021/7709 ,  G01N2021/772 ,  G01N2021/7793 ,  G01N2201/0612 ,  G01N2201/082 ,  G01N2201/0826 ,  G01N2201/0833 ,  G01N2201/084 ,  G01N2201/088

Abstract: An optical system for sensing an environmental parameter, comprising: an optical pulse generator for generating an excitation pulse; a pulse splitter for splitting the excitation pulse into a sensing pulse and a reference pulse; a sensing arm for receiving the sensing pulse, the sensing arm comprising an emission sensor for sensing the environmental parameter, the optical emission sensor generating a first measurement pulse having a measurement wavelength; a reference arm for receiving the reference pulse, the reference arm comprising an emission artefact adapted to convert the reference pulse into a second measurement pulse having the measurement wavelength; a time delay line for delaying a relative propagation of the measurement pulses; a light detector for measuring an optical energy of the first and second measurement pulses; and an optical link for optically connecting the pulse generator to the pulse splitter, and the sensing and reference arms to the light detector.

Abstract translation: 一种用于感测环境参数的光学系统，包括：用于产生激励脉冲的光脉冲发生器; 用于将激励脉冲分成感测脉冲和参考脉冲的脉冲分离器; 用于接收感测脉冲的感测臂，所述感测臂包括用于感测所述环境参数的发射传感器，所述光发射传感器产生具有测量波长的第一测量脉冲; 用于接收参考脉冲的参考臂，所述参考臂包括适于将所述参考脉冲转换成具有所述测量波长的第二测量脉冲的发射伪影; 用于延迟测量脉冲的相对传播的延时线; 用于测量第一和第二测量脉冲的光能的光检测器; 以及用于将脉冲发生器光学连接到脉冲分离器的光学链路，以及用于光检测器的感测和参考臂。

公开(公告)号：US20220018771A1

公开(公告)日：2022-01-20

申请号：US16931474

申请日：2020-07-17

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： François BABIN ,  Jean-François GRAVEL ,  Pascal DUFOUR

IPC: G01N21/64 ,  G01N21/65 ,  G01N33/00

Abstract: There is described a method for detecting a given gas species present in a gaseous sample. The method generally has splitting a primary optical pulse into first and second optical pulses, the primary optical pulse having a duration and carrying optical power within an excitation spectrum encompassing at least one absorption spectral band of the given gas species, the first optical pulse being propagated across an optical gas filter unit containing an amount of the given gas species and attenuating the first optical pulse at the at least one absorption band, one of i) the primary optical pulse and ii) the first and second optical pulses being propagated across the gaseous sample, and temporally delaying the first and second optical pulses from one another; measuring signal values of the delayed optical pulses; and detecting the presence of the given gas species in the gaseous sample based on the signal values.

公开(公告)号：US20180052100A1

公开(公告)日：2018-02-22

申请号：US15679359

申请日：2017-08-17

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： François BABIN ,  Jean-François GRAVEL ,  Pascal DUFOUR

IPC: G01N21/33 ,  G01N21/65

CPC classification number: G01N21/33 ,  G01J3/44 ,  G01M3/18 ,  G01M3/38 ,  G01N21/65 ,  G01N21/94 ,  G01N2021/1797 ,  G01N2201/0214

Abstract: The method of determining the presence of a spill of a petroleum product by the detection of a petroleum-derived volatile organic compound (VOC) generally has a step of providing an ultraviolet (UV) radiation generator and a receiver assembly aimed at a scene; a step of illuminating a distant target in the scene with a UV radiation beam, the UV radiation beam having an excitation wavelength being tuned to a resonance Raman excitation wavelength of the petroleum derived VOC; a step of receiving a return signal from the distant target; and a step of determining the presence of the petroleum-derived VOC upon detecting Raman scattering in the received return signal, the Raman scattering being indicative of a resonance Raman interaction between the UV radiation beam and molecules of the petroleum-derived VOC.

公开(公告)号：US20190204231A1

公开(公告)日：2019-07-04

申请号：US16326763

申请日：2017-08-18

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： François BABIN

IPC: G01N21/65 ,  G01N21/33 ,  G01N21/94 ,  G01J3/44

CPC classification number: G01N21/65 ,  G01J3/44 ,  G01J3/4406 ,  G01M3/18 ,  G01M3/38 ,  G01N21/33 ,  G01N21/94 ,  G01N2021/1797 ,  G01N2201/0214

Abstract: The method for determining the presence of a molecule having a Raman resonance generally comprises illuminating a sample with a first radiation beam, the first radiation beam having a first excitation wavelength being tuned to a Raman resonance of the molecule; receiving a first return signal from the sample following illumination of the sample with the first radiation beam; measuring a first intensity of the first return signal using an intensity detector; illuminating the sample with a second radiation beam, the second radiation beam lacking the first excitation wavelength and having a second excitation wavelength being different from the first excitation wavelength; receiving a second return signal from the sample following illumination of the sample with the second radiation beam; measuring a second intensity of the second return signal using an intensity detector; and determining the presence of the molecule in the sample based on the first and second intensities.

公开(公告)号：US20160131514A1

公开(公告)日：2016-05-12

申请号：US14938955

申请日：2015-11-12

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： François BABIN ,  Jean-François GRAVEL

IPC: G01F1/86 ,  G01N21/65

CPC classification number: G01F1/86 ,  G01N21/39 ,  G01N21/53 ,  G01N21/6456 ,  G01N21/65 ,  G01N2021/1793 ,  G01N2021/399 ,  G01N2021/536

Abstract: There is described a method for remotely monitoring an exhaust plume emitted by an exhaust stack, the method comprising: determining a velocity of a flow of the exhaust plume at an output of the exhaust stack, the exhaust plume comprising one molecule; propagating a first light within the exhaust plume, the first light being propagated in close proximity to the output of the exhaust stack; detecting a second light emitted by the exhaust plume and measuring an energy of the second light, the second light resulting from an interaction of the first light with the exhaust plume; and determining a mass emission rate of the at least one molecule using the measured energy of the detected second light, the velocity, and a surface area of the exhaust plume at the output of the exhaust stack, the surface area being orthogonal to a direction of the flow of the exhaust plume.

Abstract translation: 描述了一种用于远程监测由排气烟囱发射的排气羽流的方法，所述方法包括：确定排气烟囱在排气烟囱的输出处的流量的流速，所述排气羽流包含一个分子; 在排气羽流内传播第一光，第一光在废气堆的输出附近传播; 检测由所述排气羽流发射的第二光并测量所述第二光的能量，所述第二光由所述第一光与所述排气羽流的相互作用产生; 以及使用所检测的第二光的测量能量，所述速度以及所述排气烟囱的输出处的所述排气羽流的表面积来确定所述至少一个分子的质量排放速率，所述表面积正交于 排气羽流的流动。