Patent attributes
A film exposer has a modulator which modulates light from a light source and projects it onto a light-sensitive film guided continuously past the modulator. The modulator comprises a two-dimensional arrangement of elements which each project a specific quantity of light onto the film. A pixel entering the projection area of the modulator of the film on one side integrates the light which is projected onto the pixel by elements arranged in a row in the transport direction of the film. The quantity of light integrated by the pixel depends on how many elements are switched on, that is to say project light onto the film, while the film passes through the projection area of the modulator. The total quantity of the light to be integrated can be adjusted for each pixel by appropriate control of the elements respectively lying in a row in the transport direction of the film. In one embodiment of the film exposer, the quantity of light projected by individual elements or groups thereof can be adjusted individually or differs by area.
