Laser Raman spectrophotometry system and adjustment thereof

Details Laser Raman spectrophotometry system and adjustment thereof Laser Raman spectrophotometry system and adjustment thereof

1982-01-07

1985-03-19

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

G01J 344

Patent

active

045055866

ABSTRACT:
A laser Raman spectrophotometry system for analyzing a sample material by measuring spectrum of Raman scattering produced by the sample under irradiation of laser light includes a laser light source for excitation of luminescence in addition to a laser light source for the excitation of the Raman scattering, and an optical system for rendering the optical path of the laser beam for luminescence excitation to substantially coincide with the optical path of the laser beam for the Raman scattering immediately before irradiation of the specimen. Luminescence spectrum brought about by the laser beam for luminescence excitation is adjusted by adjusting the laser power to simulate the luminescence spectrum concurrently produced by the laser beam for the excitation of Raman scattering, wherein both spectra of luminescence are subtractively combined together, to thereby cancel the luminescence component and allow only the spectrum of Raman-scattered light to be measured with a correspondingly enhanced accuracy.

REFERENCES:
patent: 4100416 (1978-07-01), Hirschfeld
Morhange et al., Applied Optics, vol. 15, No. 12, Dec. 1976, pp. 2969 and 2970.
Burgess et al., J. Physics E. Scientific Instruments (GB), vol. 10, No. 6, Jun. 1977, pp. 617-620.
Ignatev et al., Sov. Tech. Phys. Lett. vol. 4, No. 2, Feb. 1978, pp. 58 and 59.

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