Back to results
US 4,788,131 AGranted
Method of electronic processing of exposed photographic material
AssigneeEastman Kodak Company
InventorsLillian M. Kellogg, Joseph M. Hodes
Life of this patent
Estimating the term…
Abstract
A method is described for electronically processing exposed photographic materials for detection and measurement of latent images contained therein.
Claims12
A method of electronic processing of a latent image from a photographic element comprising the steps of:
- (a) providing an exposed photographic element comprising photosensitive silver halide grains;
- (b) placing the element in an electromagnetic field and cooling the element to a temperature between about 4 to about 270K to prevent further image formation;
- (c) subjecting the element to a uniform exposure of relatively short wavelength radiation;
- (d) exposing the element to pulsed, high intensity, relatively longer wavelength radiation to excite electrons out of image centers;
- and
- (e) measuring any resulting signal with radiofrequency photoconductivity apparatus.
3 more elements
Dependencies are inferred from the claim text.