| 摘要 |
PROBLEM TO BE SOLVED: To make the gradation of a table memory necessary for actual density regulation securable and to make the resolution of images maintainable even when high-sensitivity photosensitive materials are used. SOLUTION: This laser beam scanning unit 100 has laser beam sources 104R, etc., for generating laser beams, an LUT 1064 updatably storing optical modulation data in correspondence to the respective gradations of the image data, an AOM 106R, etc., for modulating the intensity of the laser beams from the laser beam source with the optical modulation data from the LUT, an output regulating means for printing the images onto the photosensitive materials 1 by introducing the modulated laser beams to the photosensitive materials 1 on the downstream with a scanning optical system and increasing or decreasing the outputs of the respective laser beam sources in correspondence to the kinds, etc., of the photosensitive materials 1 and a memory updating means 1065 for increasing or decreasing the respective gradations of the optical modulation data stored in the LUT according to the increase or decrease of the outputs described above.
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