Abstract

An x-ray sensitometric calibration of Kodak RAR 2490 film has been performed over the 0.28–8.04-keV range of photon energies. The characteristic curves (optical density D vs exposure H) are fit well over the entire range by a two-parameter, analytic function, log10(10D − 1) = A log10H + B. Solarization is found to occur at an exposure of 2 × 103 photons/(μm)2 for 1.49-keV photons. Comparison with other films is made.

© 1977 Optical Society of America

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