| 摘要 |
PURPOSE:To execute positioning between transferred pictures precisely even if the moving speed of an original, the peripheral speed of a photosensitive body and the moving speed of transfer paper are not precisely equal by adjusting the angle of the optical axis of at least one convergent optical transmitting body. CONSTITUTION:Since it is recognized that the shift of exposing timing due to the difference between the speed VS of the original and the peripheral speed VD of the 3rd photosensitive body 3c is DELTAl3, the optical axis of a convergent optical transmitting body array 6 for the 3rd photosensitive body 3c is adjusted so that the photodetecting point of reflected light is shifted from the original by 1/2DELTAl3. Thereby, the photodetecting point is compensated by 1/2DELTAl3 and an exposing point on the 3rd photosensitive body 3c is simultaneously compensated by 1/2DELTAl3, so that the exposing position can be compensated by DELTAl3 in total. Similarly, the optical axis of the convergent optical transmitting body array 6 for the 1st photosensitive body 3a is adjusted so that the photodetecting point of the reflected light from the original is shifted by 1/2DELTAl6 because it is recognized that the shift of transfer timing due to the difference between the speed VP of the transfer paper and the peripheral speed VD of the photoreceptor 3a is DELTAl6. |
