The granular nature of the photographic emulsion places a limit on the accuracy with which the density of a small area on the film can be defined. This in turn limits the accuracy with which incident exposures can be calculated when, for example, a spectrograph is employed for radiometric measurements. The quantity of information conveyed by a single density measurement is estimated for a particular emulsion and microdensitometer scanning aperture.
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References
1.
MilneG., “High Speed Spectrograph Designs for the Visual and Ultraviolet Spectral Regions,” interim report on contract NONR 1799 (01), Institute of Optics, University of Rochester (July 1956)
2.
MeesC. E. K., The Theory of the Photographic Process, (1954) p. 170
3.
WebbJ., J. Opt. Soc. Am.45, 379 (1955)
4.
ZweigH.HigginsG., and MacAdamD., J. Opt. Soc. Am.48, 928 (1958)
5.
GoldmanS., Frequency Analysis, Modulation, and Noise, (1948) pp. 303–306
