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. 02, 1989
Filed:
Jun. 28, 1982
Applicant:
Inventor:
Georges Comte, Lyon, FR;
Assignee:
Les Cables De Lyon, Lyon Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 731 ;
Abstract
An echometer which translates an optical signal into the centimetric or decimetric wave bands. A test signal and the local oscillator signal are provided by a single laser oscillator. The test signal and the local oscillator signal, which are 90.degree. different in phase, are modulated at centimetric or decimetric frequencies, and detected by mixing echo signals and the local oscillator signal with a photodiode or the like.