| 摘要 |
PURPOSE:To make the photoelectric conversion output signal uniform by a method wherein the arrangement of a diode array is made coarse to dense from the center to the end. CONSTITUTION:The arrangement of light emitting diodes is so performed that the array end becomes in dense pitch, the center in coarse one, and the medium part in the intermediate one between dense and coarse, thus making the amount of image-forming light in an optical image forming plane uniform at a necessary part. As a result, the photoelectric conversion output signal becomes uniform because of obtaining the amount of uniform image forming light in said plane, therefore a uniform reproduced picture image can be obtained. Accordingly, the shading as conventional that the amount of image forming light by the uniform amount of light becomes large at the center of said plane and smaller toward the periphery can be corrected. |
