- Patent Title: Device and method for fast recording of an absorption spectrum of a fluid using a plurality of etalons in combination with a tunable fabry-perot interferometer
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Application No.: US14390523Application Date: 2013-04-04
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Publication No.: US09939374B2Publication Date: 2018-04-10
- Inventor: Ralf Buchtal , Peter Dreyer , Livio Fornasiero
- Applicant: Dräger Medical GmbH
- Applicant Address: DE Lübeck
- Assignee: DRÄGERWERK AG & CO. KGAA
- Current Assignee: DRÄGERWERK AG & CO. KGAA
- Current Assignee Address: DE Lübeck
- Agency: McGlew and Tuttle, P.C.
- Priority: DE102012007030 20120405
- International Application: PCT/EP2013/057112 WO 20130404
- International Announcement: WO2013/150102 WO 20131010
- Main IPC: G01N21/3504
- IPC: G01N21/3504 ; G01J3/26 ; G01J3/42 ; G01J3/433

Abstract:
A device for recording an absorption spectrum of a fluid has a radiation source (1) that emits a radiation in a spectral range along a beam path (11), a measuring path (5), along which the radiation passes through the fluid and arranged in the beam path, a tunable Fabry-Perot interferometer (7), arranged in the beam path and transmitting radiation in the spectral range as a displaceable bandpass filter, and a detector (9, 35) measuring the intensity of the radiation in the spectral range. An etalon (3) is arranged for spectral modulation of radiation in the beam path and has a plurality of transmission maxima (17) in the spectral range. The bandpass filter, formed by the Fabry-Perot interferometer (7), is displaceable across the spectral range such that spectral modulation of the radiation by the etalon (3) is measured by the detector (9, 35) as a modulation of radiation intensity over time.
Public/Granted literature
- US20150300948A1 DEVICE AND METHOD FOR FAST RECORDING OF AN ABSORPTION SPECTRUM OF A FLUID Public/Granted day:2015-10-22
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