Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Patent
1991-02-15
1994-05-31
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
356236, 356318, 356346, G01N 2164, G01N 2165
Patent
active
053173783
ABSTRACT:
A spherical sample cell (FIG. 4A) bears an external inwardly specular laye defining a hollow imaging mirror 11D and an optical aperture 11E. The mirror acts as an integrator of both the exciting radiation for irradiating the sample and the resulting excited radiation to be analysed, the former entering and the latter exiting through the aperture 11E. Optical integration resulting from multiple internal reflections provides multifold increase in excited radiation compared with bare cells, which is of particular advantage in Raman spectrophotometry. Alternatively, the mirror may be provided in two complementary halves in a two-part cell-holder, in which case any conventional sample cell that fits within the mirror may be used. Spectrophotometers adapted for use with the sample cell or the cell holder as well as methods based on them are described.
REFERENCES:
patent: 4583860 (1986-04-01), Butner
patent: 4645340 (1987-02-01), Graham et al.
patent: 4684255 (1987-08-01), Ford
patent: 4838688 (1989-06-01), Rhoads
Jarrell Ash Engineering Publications Technical Bulletin, Prepared: Jun. 1969 Preliminary EB-146, Title-Raman Spectra from the Inorganic Gases.
Bennett Robert
Mould Henry M.
Grimes Edwin T.
Hantis K. P.
McGraw Vincent P.
Perkin-Elmer Ltd.
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