Influence of Crossover Light on the Shape of the Characteristic Curve

Abstract

The shape of he characteristic curve of the double screen/film system is known to be affected by the screen light spectrum. This suggests that the crossover light also affects the shape of the characteristic curve because its spectrum is different from that of primary light. Therefore, a study of the influence of crossover light on the shape of the characteristic curve was carried out from the viewpoint of the spectrum and incident direction of light to an emulsion. The component of blue light in the crossover light was increased relative to the primary light. The characteristic curves were nearly the same when the primary and crossover light, which have different spectra, fell on the surface of the emulsions. The characteristic curves, which were made by rays of incident light from the surface and base of the emulsion, were different even if the lights had the same spectra. It was determined that crossover light influenced the shape of the characteristic curve. Furthermore, it was also determined that the influence is caused by the incident direction of light to an emulsion, not by the spectrum.