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:
Mar. 27, 2001
Filed:
Sep. 10, 1999
Torsten Diehl, Fischbachtal, DE;
Norbert Lenk, Ilmenau, DE;
Rainer Riesenberg, Jena, DE;
Jürgen Schöneich, Jena, DE;
Abstract
The invention relates to a Hadamard spectrometer which enables the detection of a range of polyatomic gases or liquids for example using infrared absorption. The aim of the invention is to produce a spectrometer of this type which provides higher resolution, improved wavelength precision and an improved signal-to-noise ratio using conventional detector lines and which allows a small and compact design. To this end, a detector line (,) with a set interval (a) between the individual detector areas (,) is used for a detector unit (,), and a linear assembly (,) is also used for a light-emitting respective reflective assembly (,). The linear assembly includes (n) adjoining identical light sources (,), n always remaining ≧3, which can be activated individually according to the Hadamard Principle. The individual light sources (,) are positioned at an interval (b) from each other in such a way that b is an integral multiple of a plus or minus 1/n when they are projected onto the detector line.