DEVELOPMENT OF A NEAR INFRARED-VISIBLE SPECTROPHOTOMETER AT UTMSL
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Date
1973
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
A high resolution spectrometer has been designed to operate in the wavelength region spanning the near infrared through the visible. The monochromator configuration is a 1 1/4 meter Ebert-Fastie. The grating is a Bausch and Lomb $5 \times 10$ inch, 316 groove per millimeter echelle driven by a programmable stepping drive. A Perkin Elmer Model 112 spectrometer equipped with a $CaF_{2}$ prism has been modified to act as a predisperser. The sample section follows the monochromator so that only the highly dispersed light excites the sample gas. An interesting feature of the sampling section is the method of double beaming. A beam flipping mirror shifts the sample beam through two paths to a single detector. The signal from the detector [lead sulphide or photomultiplier] is amplified and digitized by an $A/D$ converter and then routed by a PDP-11 computer system to a storage buffer. Design features and performance will be discussed.
Description
Author Institution: Molecular Spectroscopy Laboratory, Department of Physics and Astronomy University of Tennessee, Knoxville