EXPOSURE DEVICE

摘要

There is provided an exposure device capable of suppressing the affect of a temperature change even if the ambient temperature is changed, realizing an accurate gradation expression, and outputting a stable photograph image quality. Gradation data (P4) which has been inputted is converted into correction gradation data by a conversion table for correcting the non-linearity of the exposure concentration. The exposure condition in the exposure head is controlled according to the correction gradation data, thereby performing gradation exposure to a photosensitive material. A plurality of conversion tables are provided corresponding to the temperature ranges and a temperature detection unit is provided for detecting the ambient temperature. According to the temperature data in the temperature detection unit, the conversion tables are switched by the switching data. As a result, even if the ambient temperature is changed, it is possible to perform an accurate gradation expression and output a stable photograph image quality.