| 摘要 |
PURPOSE:To realize a clear copying for such a center bound-form original as a book, etc., by measuring the distance between the original and the original board and the angle of inclination of the original to control the position of the original board and the scanning speed and at the same time carrying out the control of the luminous intensity. CONSTITUTION:The distance between an original board 1 and the original and the angle of inclination of the original are measured by means of a semiconductor laser oscillator 5 and a CCD image sensor 7 in a distance measuring circuit 16. The board 1 can move up and down by means of an original board position controller consisting of the support members 8 and 9. The measurement signal of the circuit 16 is supplied to a prescribed circuit. Then a light source 20, the scanning speed of a mirror 21 and the position of the board 1 are controlled in accordance with the distance between the original and the board 1 and the angle of inclination of the original. In addition, the luminous intensity on the original surface is measured to control the voltage of the light source 20. As a result, the reduction and the bur of a picture and a full-black picture caused by the lack of the light volume can be eliminated to obtain a clear picture. |
