Abstract

Experiments were performed to discover whether or not the use of the step-sector is a valid method of film calibration for spectrochemical analysis. It was found for the films tested, viz., Eastman Spectrum Analysis No. 1, Spectrum Analysis No. 2, I–L, 103–F, I–N, and III–F, that the calibration curve was a valid one if the sector was run at speeds greater than about 40 flashes per exposure. Schwarzschild coefficients were calculated for the above films under the conditions of the experiment.

© 1951 Optical Society of America

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