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公开(公告)号：US20250146870A1
公开(公告)日：2025-05-08
申请号：US18940403
申请日：2024-11-07
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Jürgen Dessecker , Patrick Ehlers , Marc Winter , Joseph B. Slater
Abstract: A spectrometer including: a laser light source, including a tunable diode laser with a coherent laser output, wherein the laser light source is configured to modulate the frequency of the coherent laser output; a photodetector arranged to receive the coherent laser output; at least one optical element arranged between the laser output and the photodetector; and an evaluation unit electrically connected to the photodetector. The laser light source and/or the first optical element is mounted on a movable carrier, wherein the movement of the carrier is oscillatory and changes the path length of the radiation such that interference signals are suppressed, wherein the suppression occurs due to interference between the radiation emitted from the light source and the change in the path length of the beam path due to the movement on the movable carrier.
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Patent Agency Ranking
公开(公告)号：US20240222836A1
公开(公告)日：2024-07-04
申请号：US18148550
申请日：2022-12-30
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Joseph B. Slater , Marc Winter
Abstract: A waveguide for conveying light with an input end and an output end to supply for an electromagnetic spectrometer includes: an input end having a convex envelope of a cross-section of the waveguide at the input end, which envelope defines a circular shape or a shape of a regular polygon with n1 corners, wherein n1 is a natural number bigger than 3; an output end having a cross-section that defines a slit shape; and a plurality of filaments, wherein an arrangement of the plurality of filaments defines the cross-sections at the input and output ends, wherein each filament includes a core and a reflective coating covering a lateral area of the core, wherein the core includes an optically transparent material.
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公开(公告)号：US11874230B2
公开(公告)日：2024-01-16
申请号：US17806134
申请日：2022-06-09
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Joseph B. Slater , Marc Winter , Oliver Link
CPC classification number: G01N21/65 , G01N9/24 , G01N33/0027
Abstract: A method for determining an amount of a Raman-invisible gas in a multi-component gas stream includes performing a first and second absolute Raman analysis on the gas stream. A decrease in the absolute Raman bands from the first analysis to the second analysis is attributed to an increase of the Raman-invisible gas in the gas stream. The amount of the Raman-invisible gas is calculated from the difference between the first and second sets of Raman bands. The calculation of the Raman-invisible gas is verified via a measurement and a calculation of a secondary property of the gas stream such as the thermal conductivity of the gas stream or the density of the gas stream.
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公开(公告)号：US20230400413A1
公开(公告)日：2023-12-14
申请号：US17806134
申请日：2022-06-09
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Joseph B. Slater , Marc Winter , Oliver Link
CPC classification number: G01N21/65 , G01N33/0027 , G01N9/24
Abstract: A method for determining an amount of a Raman-invisible gas in a multi-component gas stream includes performing a first and second absolute Raman analysis on the gas stream. A decrease in the absolute Raman bands from the first analysis to the second analysis is attributed to an increase of the Raman-invisible gas in the gas stream. The amount of the Raman-invisible gas is calculated from the difference between the first and second sets of Raman bands. The calculation of the Raman-invisible gas is verified via a measurement and a calculation of a secondary property of the gas stream such as the thermal conductivity of the gas stream or the density of the gas stream.
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公开(公告)号：US20240219231A1
公开(公告)日：2024-07-04
申请号：US18148564
申请日：2022-12-30
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Marc Winter , Joseph B. Slater
CPC classification number: G01J3/0294 , G01J3/0208 , G01J3/0221 , G01J3/024 , G01J3/18 , G02B6/02295
Abstract: A photonic crystal waveguide for conveying light with an input end and an output end to supply for an electromagnetic spectrometer includes: an input end having a convex envelope of a cross-section of the waveguide at the input end, which envelope defines a circular shape or a shape of a regular polygon with n1 corners, wherein n1 is a natural number bigger than 3; an output end having a cross-section that defines a slit shape; and a plurality of photonic crystal fibers, wherein an arrangement of the plurality of photonic crystal fibers defines the cross-sections at the input and output ends.
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公开(公告)号：US20240175804A1
公开(公告)日：2024-05-30
申请号：US18522602
申请日：2023-11-29
Applicant: Endress+Hauser Optical Analysis, Inc.
Inventor： Tobias Meinert , Benjamin Scherer , Marc Winter , Valentin Wittstock
CPC classification number: G01N21/1702 , G01N33/0027 , G01N2021/1704
Abstract: A gas sensor for determining a concentration of at least one gas in a gas mixture includes: at least one intensity modulatable light source; a measuring section, into which the gas mixture to be investigated can be allowed to flow; and an essentially gas-sealed detection cell, wherein the gas sensor is embodied such that light emitted from the light source is radiated into a measuring section, wherein the intensity of the emitted light is modulated with a modulation frequency, which differs from the resonant frequency of a mode of the acoustic resonance of the detection cell by less than 0.5 times, especially less than 0.25 times, the half-width of the mode. Further, a method for determining the concentration of the at least one gas in the gas mixture uses the gas sensor.
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