| 摘要 |
PURPOSE:To correct the uneven light quantity in accordance with the overlap degree of a focusing optical transmission body array, by interlocking the focusing optical transmission body array and a holding base in the direction for approaching an image forming surface and going away therefrom, so that a moving distance of the holding base goes to two times of a moving distance of the focusing optical transmission body array. CONSTITUTION:A focusing optical transmission body array 5 is placed in a position where the distance to the holding surface 1a of a holding base 1, and the distance to an image forming surface 3a of an image forming body are equal. In such a state, when an adjusting member 10 is operated, the focusing optical transmission body array 5 moves in the direction for approaching the image forming surface 3a and going away therefrom, and an overlap degree (m) is varied. In such a case, by interlocking with the movement of the focusing optical transmission body array 5, the holding base 1 moves by the distance of two times of a moving distance of the focusing optical transmission body array 5, and accordingly, even when the adjusting member 10 is operated, the state that the focusing optical transmission body array 5 is placed at a position where the distance to the holding surface 1a and the distance to the image forming surface 3a are equal is maintained. In such a way, the uneven light quantity can be corrected simply in accordance with the overlap degree (m) of each focusing optical transmission body array.
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