Image recording apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorKenji Sakakibara
Life of this patent
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Abstract
In an image recording apparatus, a halftone screen having its light transmittance varying regularly is arranged on an optical path extending between a light source and a photo-sensitive recording medium. The halftone screen is movable along the optical path between an operative position where a screening effect of the halftone screen is validated and an inoperative position where the screening effect of the halftone screen is invalidated. A controller is provided for controlling the position of the halftone screen in such a manner that when an image on an original is of a continuous tone, the halftone screen is moved to the operative position, while when the image on the original is of a dot tone, the halftone screen is moved to the inoperative position.
Claims12
An apparatus for recording an image on an original onto a photo-sensitive recording medium high in gamma value, which comprises:
- light source means for emitting a light with which said original is illuminated, the light from said light source means passing along a predetermined optical path extending between said light source means and said photo-sensitive recording medium;
- an optical system arranged on said predetermined optical path for exposing said photo-sensitive recording medium to the light from said original to form an image on said photo-sensitive recording medium, which image corresponds to the image on said original;
- halftone screen means having its light transmittance varying regularly, said halftone screen means being arranged on said optical path for movement therealong with respect to said photo-sensitive recording medium between an operative position where a screening effect of said halftone screen means is validated and an inoperative position where the screening effect of said halftone screen means is invalidated;
- moving means for moving said halftone screen means between said operative and inoperative positions;
- and
- control means for controlling said moving means in such a manner that when the image on the original is of a continuous tone, said moving means moves said halftone screen means to said operative position, while when the image on the original is of a dot tone, said moving means moves said halftone screen means to said inoperative position.
Dependencies are inferred from the claim text.