| 摘要 |
PURPOSE:To generate a picture without density and color unevenness by revising exposure information of an optical beam corresponding to picture information in response to a measured temperature of a photosensing material and controlling the exposure of the light beam based on the revised exposure information. CONSTITUTION:The temperature of a photosensing material 36 is measured by a temperature sensor 46 and inputted to a control circuit 12 via an ADC 48. The circuit 12 converts the measured temperature of the material 36 into exposure information of a laser beam. The converted exposure information is inputted to each driver 58 and laser beams L1, L2, L3 of a prescribed exposure radiate from the semiconductor laser 14 by driving the relevant semiconductor laser 14. The beams L1, L2, L3 radiating from the laser 14 are mixed through an optical path 24 and the result radiates to the material 36 via reflection mirrors 26,28, a polygon mirror 30, an ftheta lens 32 and a cylindrical mirror 34. Thus, the laser beam with the exposure in response to the measured temperature radiates to the photosensing material, a prescribed coloring density is obtained and a desired picture is formed. |
