Method for producing halftone dots in a halftone plate recording apparatus
AssigneeDainippon Screen Seizo Kabushiki Kaisha
InventorTakashi Sakamoto
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Abstract
A method for producing halftone dots in a halftone plate recording apparatus is disclosed. A photosensitive material is scanned with a purality of light beams and a plurality of minute dots in lattice-like arrangement are exposed in the range of the halftone dots areas of the halftone plate. Distribution of the quantity of light beams for recording the minute dots is gradually reduced from the center to the periphery thereof, and the intensity of exposure light beams on the minute dots is controlled by the degree of conformity of the minute dots or the pattern of their arrangement with the halftone dot areas.
Claims4
A method for producing halftone dots in a halftone plate recording apparatus in which a photosensitive material is scanned by using a plurality of exposure light beams, and a plurality of minute points are exposed in lattice-like arrangement within halftone dot areas of a halftone plate to be recorded characterized by comprising the following steps:
- gradually reducing distribution of the quantity of exposure light beams which are used for recording said minute dots from the center to the periphery thereof;
- and
- controlling the intensity of exposure light beams on said plurality of minute dots depending on the degree of conformity of said minute dots or the pattern of their arrangement with said halftone dot areas.
Dependencies are inferred from the claim text.