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Proceedings Paper

High-performance spectrophotometer
Author(s): David R. Massie; Stephen R. Delwiche
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Paper Abstract

A spectrophotometer system is being updated with a new computer and control circuitry to measure agricultural products in the UV through NIR regions of the electromagnetic spectrum. This single beam instrument, along with its computer, will have wavelength repeatability near 0.005 nm. This performance is required for proper system response compensation in a single beam system. Analog electronics are kept to a minimum by early conversion of the signal with a 10-microsecond(s) 16-bit A/D converter. A fast response real-time computer is required to service the A/D, wavelength drive, and optical chopper. The paper reports on the development and selection of computer interfaces, data collection techniques, and performance characteristics of this laboratory spectrophotometer system. The system is regularly used as the development tool in investigating new measurement techniques on agricultural products, and also to evaluate optical filters and other spectrophotometric systems.

Paper Details

Date Published: 6 January 1995
PDF: 7 pages
Proc. SPIE 2345, Optics in Agriculture, Forestry, and Biological Processing, (6 January 1995); doi: 10.1117/12.198892
Show Author Affiliations
David R. Massie, USDA Agricultural Research Service (United States)
Stephen R. Delwiche, USDA Agricultural Research Service (United States)

Published in SPIE Proceedings Vol. 2345:
Optics in Agriculture, Forestry, and Biological Processing
George E. Meyer; James A. DeShazer, Editor(s)

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