| 摘要 |
PURPOSE:To obtain a large output with high image resolution even in case the sufficient luminance is not obtainable on the photodetecting surface within an image pickup element, by securing the correspondence between the feeding speed of an original picture and the transfer speed of the electric charge in the image pickup element. CONSTITUTION:An image pickup element 20 contains a photodetecting transfer part 21 where CCD 31-34, etc., use both as the photodetecting parts and transfer parts are arranged and an output register 22 where the CCD 35, etc. are set in one train. The output is extracted via an amplifying part 23 for the element 20. The pitch Pc between CCDs is set so as to satisfy Pc=mPd, where Pd means the scanning line pitch of an original 1 and (m) is the magnification ratio of a lens 2, respectively. At the same time, for the CCds within the element 20, the element 20 is set so that the transfering direction of the electric charge is coincident with the direction where the original picture shifts on the element 20. In such a way, a large output is obtained with high image resolution without accelerating the reading speed even in case the sufficient luminance is not obtainable on the photodetecting surface within the element 20. |
