Abstract

A digital pulse integrator is described for measuring the voltage-time area of electrical impulses such as the photocurrent resulting from the photoelectric observation of a xenon flash source. As the basis of its operation, the positive pulse to be integrated charges a capacitor. A decade scaler then counts the number of smaller negative pulses from a crystal oscillator that are required to discharge the capacitor to its original voltage.

A specific circuit has been tested both with square pulses having an adjustable amplitude and duration and with linearly attenuated impulses of irregular shape. Repeated measurements of similar pulses are reproducible within ±1 count. For pulses having amplitudes in the range 50 to 170 v and areas in the range 1.5 to 24 msec-v the observed count is linearly proportional to the pulse area within ±2 counts.

© 1960 Optical Society of America

Stroboscopic Flash Source for Kinetic Spectroscopy*

Jerry H. Current, Odell F. Raper, Henry H. Kramer, and Edward J. Bair
J. Opt. Soc. Am. 50(7) 668-671 (1960)

Minimum Detectable Dark Interval between Trains of Perceptually Fused Flashes

M. Lichtenstein and R. Boucher
J. Opt. Soc. Am. 50(5) 461-466 (1960)

Actinometric Determination of the Dissociation of Carbon Dioxide by a Single Flash*

M. H. Bortner, Vincent D. Povard, and Albert L. Myerson
J. Opt. Soc. Am. 50(2) 172-173 (1960)

Digital Circuit for Measurement of Spectral Line Intensities

Shigeo Minami, Hiroshi Yoshinaga, and Shigeru Fujita
J. Opt. Soc. Am. 51(6) 674-678 (1961)

Eye Movement and Stimulus Movement; New Photoelectric Electromechanical System for Recording and Measuring Tracking Motions of the Eye*

William M. Smith and Peter J. Warter
J. Opt. Soc. Am. 50(3) 245-250 (1960)