| 摘要 |
PURPOSE:To uniform the distribution of the quantity of transmitted light in the imaging surface of a microlens array by selectively determining the shape of each visual-field aperture in an aperture array which changes in shape successively in conformity with some rule. CONSTITUTION:The pitches of successive diamond visual-field aperture arrays 5 and 7 which correspond to an upper lens array and successive diamond visual- field arrays 6 and 8 which correspond to a lower lens array conform to those of the upper and lower lens arrays respectively, and the size of the left apertures is greater than that of the right apertures. The quantity of light transmitted through a visual-field aperture array device 12 and accumulated on a photoreceptor drum 11 as a subject 9 is scanned is proportional to the total extent of the opening of respective apertures of the upper and lower less array. The opening shapes of the apertures of the array device 12 are determined corresponding to the irregular irradiation quantity distribution of a light source 10 to correct the distribution of the quantity of cumulative scanned and transmitted light in an imaging surface to a constant value. |
