Photographic recording process
AssigneeAgfa-Gevaert
InventorsHans-Joachim Schumann, Hans hlschlager, Helmut Kampfer
Life of this patent
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Abstract
For electronic image recording in one or more colors a photographic recording material comprising in at least one layer photo-sensitive silver halide and a compound capable of luminescence is image-wise exposed and developed to produce a latent luminescence image. The image information contained in the latent luminescence image is scanned photoselectively by a luminescence spectroscopic process and is recoded electronically in the form of monochromatic luminescence signals. The process provides images in one or more colors and is highly sensitive. Recording materials of extremely low silver application can be used.
Claims9
A photographic recording process, in which a latent luminescence image is produced by the image-wise exposure of a photosensitive photographic recording material, wherein a photographic recording material comprising at least one layer which contains photosensitive silver halide and at least one compound capable of luminescence is exposed image-wise and developed by a silver halide developer to thereby produce a silver image and a latent luminescence image superimposed on the silver image, and the image information contained in the latent luminescence image is scanned photoselectively by a luminescence spectroscopic process and is recorded electronically in the form of monochromatic luminescence signals.
The process for electronically recording including the steps of
- first image-wise exposure and development of a photosensitive photographic recording material
- comprising
- at least three silver halide emulsion layers of a photographic recording material, said three silver halide emulsion layers differing in spectral sensitivity and each containing a uniform distribution of a compound capable of luminescence, each of said compounds capable of luminescence contained in one of said three silver halide emulsion layers differing from said compounds capable of luminescence contained in others of said three silver halide emulsion layers in that it is excited by exciting light from a different partial region of the spectrum,
- whereby a silver image is produced in each layer, and
- each of said silver images thus produced represents a color separation image corresponding to the spectral sensitivity of the respective layer;
- and then
- scanning each of said color separation images by a beam of monochromatic light of a wavelength suitable for the excitation of the luminescence of the compound capable of luminescence contained in the respective layer, and
- the luminescence of the compound capable of luminescence contained in each of said three silver halide emulsion layers being weakened image-wise by the silver image in said layer;
- and then
- detecting quantatively by an opto-electronic transducer device the image information of each color separation image in the form of the luminescence thus excited;
- converting the information into electronic image signals and
- recording electronically.
Dependencies are inferred from the claim text.