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公开(公告)号：JPS4956688A
公开(公告)日：1974-06-01
申请号：JP5450073
申请日：1973-05-16
Abstract: 1429198 Photometric gas analyzer ITT INDUSTRIES Inc 16 May 1973 [17 May 1972] 23313/73 Heading G1A The invention relates to apparatus for measuring the constituents of flue or stack emissions. The apparatus includes a perforated tubular probe 21 which is mounted in the stack. Light from a mercury lamp 23 is directed through the probe to be reflected back by mirror 27, to pass through a filter wheel 28 to a photo-multiplier 51 whose logarithmic response is used in the measurement by the use of a Beer's law calculation of absorption of light by the different constituents. The apparatus has a pressurized air input 30, which is fed along the sides of probe 21 and used to form air curtains in front of the windows covering mirror 27 and the housing 22, and an input 31 to provide purging of the probe with clean air for calibration purposes. The filter wheel 28 is provided with five filters, two identical ones for use in e.g. SO 2 measurement, two identical ones for e.g. NO 2 measurement, and a reference filter corresponding to a wavelength unaffected by either NO 2 or SO 2 . One each of the first two pairs is coupled with a neutral filter which cuts down the intensity by 1000 times to provide for calibration. The filter disc continuously rotates and its rotation is sensed by magnetic pick-ups 42, 43 and used by gating circuits 55', Fig. 6, to control the delivery of photo-multiplier output signals which have all been inverted in amplifiers 80-81", except for the reference filter signal which is delivered direct, through sample/hold circuits to the comparison circuit. The sample/hold circuits 57'-61' correspond to the five filter positions. In the calibration mode, a purging gas is passed through the probe and no absorption takes place therein. The filter outputs for SO 2 , NO 2 are compared with reference filter output by summing amplifiers 121', 122' and indicated at 123', 124' the switches 102', 103' being in their dotted positions. Potentiometers 88', 86" are varied to give zero values on the indicators. A range adjustment for the indicators is made by adjusting 116', 119', when the switches are in the solid position and the "calibration" SO 2 , NO 2 filters (i.e. those with additional neutral density filters) are being compared with the reference. For actual measurement, the probe is allowed to fill with flue gas and the switches are in the dotted position. The indicators may be voltmeters, or recorders or a process control may be provided. The instrument can provide smoke density or turbidity measurement. Besides visible light, ultraviolet or infrared wavelengths may be used.
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公开(公告)号：US12104957B2
公开(公告)日：2024-10-01
申请号：US17620408
申请日：2020-06-25
Applicant: Protea Ltd
Inventor： Chris Daw , Robin Hutchinson
CPC classification number: G01J3/427 , G01J3/0218 , G01J3/108 , G01J3/12 , G01N21/33 , G01N21/3504 , G01N33/0037 , G01N33/0042 , G01J2003/102 , G01J2003/1213 , G01N2021/3155 , G01N2201/08
Abstract: The invention relates to a photometer (30) for analysing the composition of a sample gas. The photometer comprises an infra-red (IR) source (20) configured to direct a first plurality of pulses (40) of IR radiation through the sample gas to an IR detector (26), at least two of the first plurality of pulses being of different wavelength. The photometer further comprises an ultraviolet (UV) source (32) configured to generate a second plurality of pulses (38) of UV radiation for conveyance to a UV detector (36), at least two of the second plurality of pulses being of different wavelength. A path selection arrangement (22, 42-50) is configured to selectively convey different ones of the second plurality of pulses (38) to one of the sample gas and the UV detector (36). The photometer further comprises processing circuitry coupled to the IR source (20), the UV source (32), the IR detector (26), the UV detector (36) and the path selection arrangement (22, 42-50). The processing circuitry is configured to (i) select the wavelength to be used for a given UV pulse of the second plurality of pulses (38), (ii) receive a plurality of detection signals from each of the IR detector (26) and the UV detector (36) and (iii) based on the detection signals, determine a concentration of at least one component of the sample gas. A method for analysing the composition of a sample gas is also disclosed.
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公开(公告)号：US20240068866A1
公开(公告)日：2024-02-29
申请号：US18237594
申请日：2023-08-24
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI
CPC classification number: G01J3/021 , G01J3/0208 , G01J3/0289 , G01J3/427 , G01J2003/423
Abstract: The spectrometer includes: a light source unit emitting a laser beam; a mirror unit including a first plane mirror having a first mirror surface and a second plane mirror having a second mirror surface, wherein a measurement target is introduced between the first mirror surface and the second mirror surface; and a light detector detecting the laser beam returned by multiple reflection between the first mirror surface and the second mirror surface. The first mirror surface and the second mirror surface are arranged non-parallel to each other when viewed from the Z-axis direction so as to form an optical path of the laser beam reciprocating in the Y-axis direction while performing multiple reflection between the first mirror surface and the second mirror surface. The optical path of the laser beam between the first mirror surface and the second mirror surface is inclined with respect to the Z-axis direction.
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公开(公告)号：US11668608B2
公开(公告)日：2023-06-06
申请号：US17063816
申请日：2020-10-06
Applicant: Tokyo Electron Limited
Inventor： Tong Wu , Kenji Nagai
IPC: G01J3/427 , G01K11/125 , G01N21/41 , G01K7/02 , G01N21/71
CPC classification number: G01K7/02 , G01J3/427 , G01K11/125 , G01N21/41 , G01N21/71 , G01N2201/1211
Abstract: A temperature measurement system configured to measure a temperature of a target object having a first main surface and a second main surface includes a light source unit configured to emit output light penetrating the target object and including a first wavelength range and a second wavelength range; a measurement unit configured to measure a spectrum of reflected light; an optical path length ratio calculator configured to calculate an optical path length ratio between the output light of the first wavelength range and the output light of the second wavelength range; and a temperature calculator configured to calculate the temperature of the target object based on the optical path length ratio and a previously investigated relationship between the temperature of the target object and a refractive index ratio between the output light of the first wavelength range and the output light of the second wavelength range.
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Patent Agency Ranking
公开(公告)号：US20230011975A1
公开(公告)日：2023-01-12
申请号：US17784870
申请日：2020-10-15
Applicant: Foss Analytical A/S
Inventor： Jeppe Sandvik CLAUSEN
Abstract: A method for determining an optical pathlength through a cuvette of a spectrophotometric apparatus includes obtaining a first single beam spectrum of a liquid zero-material at least in a first energy region in which the liquid zero-material absorbs at least a portion of incident optical radiation; obtaining a second single beam spectrum of a second liquid at least in the first energy region, the second liquid having a composition excluding the liquid zero-material and having no absorption of incident optical radiation in the first energy region; determining a dual beam spectrum of the liquid zero-material relative to the second liquid at least in the first energy region from the first and second single beam spectra; and calculating an optical pathlength through the cuvette based on processing spectral information obtained from the first energy region of the determined dual beam spectrum.
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公开(公告)号：US20220341783A1
公开(公告)日：2022-10-27
申请号：US17620408
申请日：2020-06-25
Applicant: Protea Ltd
Inventor： Chris Daw , Robin Hutchinson
Abstract: The invention relates to a photometer (30) for analysing the composition of a sample gas. The photometer comprises an infra-red (IR) source (20) configured to direct a first plurality of pulses (40) of IR radiation through the sample gas to an IR detector (26), at least two of the first plurality of pulses being of different wavelength. The photometer further comprises an ultraviolet (UV) source (32) configured to generate a second plurality of pulses (38) of UV radiation for conveyance to a UV detector (36), at least two of the second plurality of pulses being of different wavelength. A path selection arrangement (22, 42-50) is configured to selectively convey different ones of the second plurality of pulses (38) to one of the sample gas and the UV detector (36). The photometer further comprises processing circuitry coupled to the IR source (20), the UV source (32), the IR detector (26), the UV detector (36) and the path selection arrangement (22, 42-50). The processing circuitry is configured to (i) select the wavelength to be used for a given UV pulse of the second plurality of pulses (38), (ii) receive a plurality of detection signals from each of the IR detector (26) and the UV detector (36) and (iii) based on the detection signals, determine a concentration of at least one component of the sample gas. A method for analysing the composition of a sample gas is also disclosed.
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公开(公告)号：US20210172866A1
公开(公告)日：2021-06-10
申请号：US17179734
申请日：2021-02-19
Applicant: Regeneron Pharmaceuticals, Inc.
Inventor： Andria SKINNER , Natallia KULYBA
IPC: G01N21/31 , G01N33/68 , G01N30/02 , G16C20/30 , G01J3/427 , G16B5/00 , G01N21/27 , A61K47/68 , B01D15/34 , G01N21/33 , G01N30/88
Abstract: The present disclosure provides methods of assessing DAR of ADC products that provide advantages over known methods. Specifically, methods of the disclosure can be used in high-throughput applications and/or without having to dilute ADC samples during the assessment.
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公开(公告)号：US20210164912A1
公开(公告)日：2021-06-03
申请号：US16772954
申请日：2018-12-05
Applicant: ABB Schweiz AG
Inventor： Michael Ohora
IPC: G01N21/89 , G01J3/427 , G01N21/3559 , G01N21/86
Abstract: A web manufacturing supervision system for monitoring properties of a web being transported in a moving direction during a web manufacturing process, includes: a) a radiation source for illuminating a first spot on the web; b) a tunable first detector for capturing signal radiation emanating from the first spot within a signal wavelength band; the signal wavelength band being adjustable to one of at least a first wavelength band and a second wavelength band; c) a second detector for capturing reference radiation emanating from the first spot within a reference wavelength band; d) control means for alternatingly tuning the signal wavelength band to the first wavelength band and the second wavelength band and measuring the signal at both wavelength bands simultaneously.
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250.发明授权公开(公告)号：US10980456B2
公开(公告)日：2021-04-20
申请号：US16312080
申请日：2018-05-22
Applicant: Rijul Gupta
Inventor： Rijul Gupta
IPC: A61B5/1455 , A61B5/145 , G01J3/00 , A61B5/00 , G01N21/31 , G01N21/47 , G01J3/28 , G01N21/49 , G01J3/02 , G01J3/10 , G01J3/427 , G01J3/457
Abstract: A multi-channel measurement device for measuring properties of human tissue, may comprise a microcontroller and first and second source/sensor complexes. The first source/sensor complex may include a first housing having a first measurement portion, a first light sensor coupled to the microcontroller and exposed to the first measurement portion, and a first plurality of light sources coupled to the microcontroller and exposed to the first measurement portion. The second source/sensor complex may include a second housing having a second measurement portion, a second light sensor coupled to the microcontroller and exposed to the second measurement portion, and a second plurality of light sources coupled to the microcontroller and exposed to the second measurement portion. The first and second source/sensor complexes are coupled to each other such that the first measurement portion is opposite the second measurement portion and human tissue may be placed between the the first and second measurement portions. The microprocessor is configured with instructions stored in non-volatile memory to individually activate each of the light sources of the first and second pluralities of light sources and to record light intensity detected by the first and second light sources while an individual light source is activated. Each combination of an individually activated light source and one of the first and second light sensors provides a distinct measurement channel for measuring the absorption spectra of human blood and tissue.
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