| 摘要 |
PURPOSE:To attain ease of assembling and adjustment of a device and to improve the quality of reproduced picture, by using a linear image sensor and replacing a filter at each scanning in the main scanning direction so as to separate color in time division. CONSTITUTION:A lamp (l) and the 1st mirror are moved incorporatedly from a position shown by solid lines to a left position shown by dotted lines, and the 2nd and the 3rd mirrors are shifted by a half distance during this movement. The original is scanned in the sub-scanning direction by the movement of the scanning optical system. In the figure, S is a linear image sensor and the arrangement of photodetectors is extended in the vertical direction of this paper. A filter disc F is split into two as shown in the figure, one division RX is a red cut filter and the other half N is a light decreasing neutral filter and a detecting mark (d) is provided at the boundary of both divisions on a circular frame. While the detecting mark (d) is detected and the filter disc F turns by about a half turn, the front face of a lens L is covered with the red cut filter RX and the CCD completes one scanning during that time. |
