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. 22, 1988
Filed:
Apr. 17, 1986
Applicant:
Inventors:
Gerard Fortunato, Lyons, FR;
Dominique Laurent, Lyons, FR;
Assignee:
Elf France, Courbevoie, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G01J / ;
U.S. Cl.
CPC ...
356346 ; 356351 ;
Abstract
Interferometric device for the detection and/or analysis of gas, of the type comprising an optical assembly forming the image of a light source on the sensitive element of the detector, comprising a photoelastic modulator comprising a silica or fluorine plate associated to a piezoelectric ceramic to vibrate in order to give the plate a birefringency variable by compression, having an axis parallel to that of a birefringent plate and an interferential filter constituted by a grating multiplexer device; and having application to the interferometric detection of gas through high-sensitivity.