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:
Aug. 18, 1981
Filed:
Oct. 24, 1979
Applicant:
Inventor:
Paul F Liao, Fair Haven, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356301 ; 356318 ;
Abstract
Saturation spectroscopy involving synchronous phase-sensitive detection and measurement of the intensity of the output when one of the input beams is chopped has a drawback that scattered light and fluorescence from the sample will also be chopped and produce a large background signal. According to the present invention, the direction of propagation of one of the input beams is modulated. This causes the direction of propagation of the output to be similarly modulated while producing only a negligible effect on the background radiation from scattering and fluorescence.