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:
May. 21, 2002
Filed:
May. 19, 1999
Wilfried Diekmann, Lübeck, DE;
Abstract
An infrared optical gas sensor is improved with respect to the quality of the measured signal. The infrared radiation detectors ( ) used as the reference radiation and measuring radiation detectors include thin layers of a partially transparent material, which sends an electric measured signal that depends on the radiation intensity received. The infrared radiation detectors are arranged stacked one over the other and with an interposed narrow-band filter ( ) each, which are transparent at the measuring wavelength. The infrared radiation detectors have an electrically conductive coating on the top side and the underside and are contacted. The measuring radiation detector ( ) follows the reference radiation detector ( ) in the direction of the beam and the reference radiation detector ( ) is transparent for at least part of the measuring radiation at the measuring wavelength, or the reference radiation detector follows the measuring radiation detector in the direction of the beam, and the measuring radiation detector is transparent for at least part of the reference radiation at the reference wavelength.