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. 26, 1981
Filed:
May. 02, 1979
Applicant:
Inventors:
Michael J Berry, Chatham, NJ (US);
Joseph J Barrett, Morris Plains, NJ (US);
Assignee:
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356301 ;
Abstract
A method and apparatus for spectroscopic material analysis are provided. Two coherent beams of monochromatic radiation are directed through a sample of material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the vibrational frequency of a preselected constituent of the material. Molecular energy of a preselected constituent of the material is increased, thereby producing a detectable signal in the form of a pressure wave. The signal is received by a detecting mechanism which indicates the magnitude thereof.