Photoacoustic rotational raman spectroscopy
US4270864A · kind A · utility
13Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Mar 14, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 rotational 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.