| 摘要 |
PURPOSE:To reduce the dispersion of resolution in case of main scanning and secondary scanning by making the width of light reception in the vertical direction of light- receiving elements arranged in one-dimensions narrower than that in the parallel direction. CONSTITUTION:Rectangular light-receiving sections 11 juxtaposed to a CCD line sensor 9 are separated by light-shielding sections 12, and the aperture width l3 of the light- receiving section 11 represents length obtained by subtracting the width l2 of the light-receiving section 11 from a pitch l1 in the parallel direction (the direction of main scanning) of the light-receiving section. Width in the direction of secondary scanning rectangular to the direction of main scanning is represented by l4, l4<l3 is selected. When main scanning and secondary scanning have the same picture element density, picture-element density l5 in the direction of secondary scanning is equalized to the pitch l1 of the light receiving section in the direction of main scanning, and desired resolution is not acquired regarding secondary scanning on the reading of the picture of secondary scanning by main scanning and the movement of an optical system. When a solid-state image sensor is formed in l4<l3 as shown in the constitution, there is no resolution difference between main scanning and secondary scanning, thus allowing the reading of the picture with high accuracy. |
