| 摘要 |
PURPOSE:To permit a high quality image free from density nonuniformity to be obtained by making the read-out range in the direction of a secondary scanning at the time of test pattern read-out longer than the length of the one periodic time of a periodic density nonuniformity caused by the inherent property of the material to be recorded. CONSTITUTION:A conveying belt 8 is made to move at 127mm/S at the time of test pattern recording and brought to a stop when a test pattern recording part thereof reaches directly below a test pattern read-out system. A first scanning is made to store reflection light amount distributing data in a memory. The conveying belt 8 is then moved to move the material 3 to be recorded by 0.5mm. A second scanning is made of the test pattern read-out system. This cyclic action is repeated several times to make the read-out range in a primary scanning direction at least longer than the length of one periodic time of the periodic density nonuniformity caused by the inherent property of the material to be recorded and the results obtained by each scan are stored in a correction memory to correct the driving signal for driving each recording element. |
