Multiwavelength spectrophotometer

Details Multiwavelength spectrophotometer Multiwavelength spectrophotometer

1985-03-11

1987-12-29

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01J 342, G01J 336

Patent

active

047157127

ABSTRACT:
Light from a light source is dispersed by a grating. Two multichannel light detectors are arranged for detecting the dispersed light. One light detector detects the first order of interference and the other light detector detects the second order of interference in overlapping wavelength ranges. The outputs of the two light detectors are averaged for improving the S/N ratio, particularly in wavelength ranges in which the light intensity of the light source is low.

REFERENCES:
patent: 4060327 (1977-11-01), Jacobowitz et al.
patent: 4253765 (1981-03-01), Kato et al.
patent: 4357673 (1982-11-01), Willis et al.
patent: 4563090 (1986-01-01), Witte
Borman, Analytical Chemistry, vol. 55, No. 8, Jul. 1983, pp. 836A, 838A, 842A.

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