Telecine scanning apparatus with spectrally-shifted sensitivitie

Facsimile and static presentation processing – Static presentation processing – Attribute control

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358 76, H04N 911

Patent

active

050033794

ABSTRACT:
A telecine scanner is selectively conformed to evaluate the dye densities characteristic of either negative or print film. The film is interposed in a light path between a light source and a pickup stage that develops a plurality of color output signals from the light passing through the film. Color channel filters included in the pickup stage have spectral passbands in the respective colors that are broad enough to include the spectral dye densities of both negative and print materials. The scanner sensitivity is further limited to a particular film material by inserting an appropriate shaping filter set into the light path, preferably between the light source and the film, for conforming the peak sensitivity of at least one of the passbands to the peak spectral density of the corresponding dye of the particular film material.

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