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. 12, 1988
Filed:
Jun. 20, 1985
Applicant:
Inventors:
Assignee:
ELF France, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356346 ; 356352 ;
Abstract
Selective modulation interferometric detector, intended for specifically detecting and/or identifying at least one gas in a gaseous mixture, especially with the aim of carrying out analysis and/or proportioning operations, the assembly E consists of a first strip L.sub.1 of interferometric quality having plane and parallel faces, of thickness e and index n introducing a displacement .DELTA.=2ne adapted to the gas to be analyzed, this strip L.sub.1 supplying on the detector a brilliant fringe, and a second strip L.sub.2 made of the same material as the first strip L.sub.1 which is slightly prismatic and supplying on the detector average illumination.