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Quantum Theory of the Latent Photographic Image

1934; American Institute of Physics; Volume: 2; Issue: 8 Linguagem: Inglês

10.1063/1.1749516

1520-9032

T. H. James, J. J. Coleman,

Advancements in Photolithography Techniques

A general formulation involving quantum ideas is given for the relation between the amount of photolytic action in latent image formation and the amount of light producing it. A method of deducing the number of ``effective'' quanta per grain necessary to produce developability is given. Slow process emulsions require, in general, the absorption of from 3 to 4 ``effective'' quanta. This number agrees with that found for physical development by Reinders and Hamburger. Faster emulsions require a smaller number (1 to 2), showing presumably the presence of more highly developed sensitivity centers. The number for any emulsion should depend to some extent upon the developer used. Parametric equations are given which relate the amount of photolytic product to the number of developable grains. These equations lead to a characteristic curve which has a point of inflection when the number of ``effective'' quanta required per grain is greater than one but none when the number is equal to one.