| 摘要 |
PURPOSE:To improve the S/N ratio of a reproduced picture by providing an optical shutter standing in line a single liquid crystal, array on an image forming line in the main scan direction and arranging a single long-size photoelectric transducer at the opposite side to a ''Selfoc'' lens respectively. CONSTITUTION:An original 1 which is carried in the subscanning direction A at a fixed speed is irradiated by the light of an exposure lamp 3 which is condensed by a mirror 2. Then an extremely narrow linear part B of an original picture which is orthogonal to the direction A is successively formed into an image on a prescribed line via a ''Selfoc'' lens 4. This image is scanned from an end to the other end of the part B, and the bright and dark images of the original are converted into series electric signals. Then liquid crystal cells 8 constituting an optical shutter 7 are successively driven from an end through another end of the cell 8 within a period of time corresponding to the subscanning speed of the original 1. The bright and dark images on the main scanning line B on the original surface are successively transmitted every minute part and then formed into images on a photoelectric transducer 6. |
