Abstract

A general equation has been derived for the characteristic curve for the <i>spectrographic level</i> of illumination. This equation is relatively simple, fits the experimental curve very well, and although applied to only three types of emulsions so far, is believed to be applicable to most emulsions. This equation is log₁₀D_s/D=(I₁₀/I)ⁿ (t₁₀/t)^q where D and Ds are density and saturation density, respectively; I and t are intensity and time, respectively; I₁₀, t₁₀, n and q are constants. Ds, I₁₀, n and q are all parameters of emulsion, wavelength and development.

Investigations of the Exposure Scales of Characteristic Curves of Photographic Emulsion Layers*

A. P. H. Trivelli
J. Opt. Soc. Am. 42(7) 467-474 (1952)

Linearization of Characteristic Curves in Photographic Photometry

Gerard de Vaucouleurs
Appl. Opt. 7(8) 1513-1518 (1968)

Characteristic curves for photographic emulsions from nonlinear fitting: a study of statistical and model error

Joel Tellinghuisen
Appl. Opt. 30(13) 1723-1729 (1991)

The Effect of Light-Absorption on the Shape of the Photographic H. and D. Curve*

J. H. Webb
J. Opt. Soc. Am. 38(1) 27-34 (1948)

Noise Characteristics of Photographic Emulsions Used for Holography

Wai–Hon Lee and Milton O. Greer
J. Opt. Soc. Am. 61(3) 402-409 (1971)