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:
Jan. 13, 2009
Filed:
Jun. 18, 2007
Wilfried Diekmann, Luebeck, DE;
Lars Wulf, Sereetz, DE;
Wilfried Diekmann, Luebeck, DE;
Lars Wulf, Sereetz, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A measuring device for determining the concentrations of gases by radiation absorption. The device includes at least one radiation source for generating radiation, a measuring cell, which is arranged downstream of the radiation source and in which the medium to be measured is located and at least one radiation detector, which is reached by the radiation after it has been sent through the measuring cell. A radiation guide device is provided by which the radiation is guided to the radiation detector. The radiation guide device includes a main optical unit, which has, on the one hand, an optical element (), so that the punctiform radiation source is imaged in a bar-shaped radiation spot () extending along a preferred direction (), and which has, on the other hand, parallel reflection surfaces (), which extend at right angles to the preferred direction and at the inner surfaces of which the radiation is totally reflected between the optical element () and the radiation detector ().