Abstract

An infrared plant stream analyzer is described which records as its output the ratio of two wavelengths; one the measuring and the other the reference wavelength. The two wavelengths are obtained by using two entrance slits in a grating spectrometer and chopping the radiation passing through each slit at a different frequency, permitting the use of electrical bandpass filters for wavelength separation and recording.

© 1963 Optical Society of America

Direct Recording of Integrated Band Intensities from a Linear Wavelength Spectrometer

B. Schurin, D. E. Williamson, and S. A. Clough
Appl. Opt. 2(6) 611-615 (1963)

An Optical Null Double-Beam Double-Pass Infrared Spectrophotometer

Shigeo Minami
Appl. Opt. 2(12) 1309-1315 (1963)

Small Infrared Spectrometer Analyzer for Chemical Process Streams*

L. W. Herscher and N. Wright
J. Opt. Soc. Am. 43(11) 980-983 (1953)

Interferometric Measurement of Wavelengths of Infrared Atomic Emission Lines in the Extraphotographic Region

Curtis J. Humphreys
Appl. Opt. 2(11) 1155-1163 (1963)

The Observation of Extraphotographic Infrared Atomic Emission Spectra

Curtis J. Humphreys and Edward Paul
Appl. Opt. 2(7) 691-698 (1963)