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AssigneePurup-Eskofot A/S
InventorsHeidi Marianne Hyldahl, Hans Peter Ballegaard, Niels Buus
Estimating the term…
A method and an apparatus for exposing light-sensitive materials, including a first light beam conducted from a light source with the wavelength λ1 to a first exposure point on the light-sensitive material via an optical system. This system has at least one input end and one output end as well as at least one reflecting or transmitting rotating optical element arranged relatively to the optical output end, wherein at least one additional light source generates an additional light beam with a wavelength λx which is different from λ1. The additional light beam with the wavelength λx is conducted via the input end of the optical system to the output end of the optical system, so as to be geometrically coincident with the first light beam at the output end of the optical system, the additional light beam being conducted from there to an additional exposure point on the light-sensitive material inside the image setter drum in dependence on λx or the mutual difference between the wavelength Δλ, said light beams being conducted completely or partly from the input end of the optical system via one or more light guides, preferably optical fibers, to the output end of the optical system.
A method of exposing light-sensitive materials, such as films and printing plates, by means of modulated light, wherein a first light beam is conducted from a light source with the wavelength λ1 to a first exposure point on the light-sensitive material via an optical system comprising at least one input end and one output end as well as at least one optical rotating reflecting or transmitting element arranged relatively to the optical output end, wherein at least one additional light source generates an additional light beam with a wavelength λx which is different from λ1, said additional light beam with the wavelength λx being conducted via the input end of the optical system to the output end of the optical system so as to be geometrically coincident with the first light beam, said additional light beam being conducted from the output end of the optical system to an additional exposure point on the light-sensitive material in dependence on λx or on the difference between wavelengths λ1 and λx, wherein the light beams are conducted from the individual light source to an exposure point through optical fibers via the optical system, wherein a rotating optical element with wavelength-splitting properties reflects or transmits the light to the exposure point in dependence on the wavelength of the light.
Dependencies are inferred from the claim text.