Abstract

An automatic recording spectrophotometer for the visible, especially adapted for the study of cathodoluminescent materials, is described. It consists of a demountable light source and an interrupter, a glass monochromator with compensation for the variation of the dispersion with wave-length, a photoelectric electron multiplier, a signal amplifier stabilized by negative feedback, and a motor drive amplifier controlling the deflection of the recording head. The wave-length scale is made linear by the introduction of a spiral cam of appropriate form. The system is distinguished by high sensitivity (usable for sources emitting one millilumen/cm²), high speed ( $1\frac{1}{4}$ minutes for a record), linear wave-length scale, high stability and easy adjustment.

© 1939 Optical Society of America

An Automatic Spectral-Sensitivity Curve Tracer

T. B. Perkins
J. Opt. Soc. Am. 29(6) 226-234 (1939)

Automatic Recording Spectroradiometer System

W. L. Heaps
Appl. Opt. 10(9) 2045-2059 (1971)

The Response of Several Fluorescent Materials to Short Wave-Length Ultraviolet Radiations

N. C. Beese
J. Opt. Soc. Am. 29(7) 278-282 (1939)

Continuously Recording Spectroradiometer*

David L. MacAdam
J. Opt. Soc. Am. 48(11) 832-840 (1958)

Wide Range Intensity Measurements in Photoelectric Spectrophotometry

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J. Opt. Soc. Am. 29(11) 466-469 (1939)