The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2018
Filed:
Apr. 04, 2013
Dräger Medical Gmbh, Lübeck, DE;
DRÄGERWERK AG & CO. KGAA, Lübeck, DE;
Abstract
A device for recording an absorption spectrum of a fluid has a radiation source () that emits a radiation in a spectral range along a beam path (), a measuring path (), along which the radiation passes through the fluid and arranged in the beam path, a tunable Fabry-Perot interferometer (), arranged in the beam path and transmitting radiation in the spectral range as a displaceable bandpass filter, and a detector () measuring the intensity of the radiation in the spectral range. An etalon () is arranged for spectral modulation of radiation in the beam path and has a plurality of transmission maxima () in the spectral range. The bandpass filter, formed by the Fabry-Perot interferometer (), is displaceable across the spectral range such that spectral modulation of the radiation by the etalon () is measured by the detector () as a modulation of radiation intensity over time.