| 摘要 |
PROBLEM TO BE SOLVED: To emit a light in each color onto an original uniformly by using LEDs of a required minimum number in each color and not employing optical components (diffusion member or the like with high diffusion) causing a loss of luminous quantity on the way of an optical path to the original. SOLUTION: LEDs emitting each color are classified into those in each color, they are mounted on an independent board 100, and it is placed on a rotary turret 102 and positioned sequentially onto an optical axis. Thus, it is not required to place the LEDs in each color on one board, resulting in eliminating uneven luminous quantity caused by an arrangement pattern of the LEDs in each color. This is because the arrangement pattern without uneven luminous quantity can easily be set. Furthermore, since many LEDs are placed on one board, deficient luminous quantity is reduced and a light diffusion board with high diffusion is not required. |
