Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1983-04-08
1985-10-08
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
356334, 356315, G01J 318, G01J 342
Patent
active
045456801
ABSTRACT:
A chopperless spectroanalytical system of the double beam type in which radiation from a common source is split into reference and analysis beams. The two beams are directed along similar paths such that the analysis beam passes through an analysis region and the reference beam bypasses that analysis region. A monochromator has two spaced aperture regions such that one aperture region provides an entrance aperture for the analysis beam and an exit aperture for a dispersed portion of the reference beam; and the other aperture region provides an entrance aperture for the reference beam and an exit aperture for a dispersed portion of the analysis beam. The beams exiting from the two exit apertures are simultaneously monitored and compared to compensate for errors due to source fluctuations and the like.
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Perkin-Elmer Models 290B and 303 Atomic Absorption Spectrophotometers, Nov. 22, 1968 (brochure).
Fastie, W. G., "Image Forming Properties of the Ebert Monochromator," Journal of the Optical Society of America, V. 42, No. 9, p. 649.
Allied Corporation
Evans F. L.
Harringa Joel L.
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