| 摘要 |
<p>PURPOSE:To easily form a color image or gradation image on a photosensitive material having sensitivity to a plurality of different wavelengths, by controlling the voltage applied to the PLZT array arranged between a light source and an image forming lens. CONSTITUTION:As a color photosensitive material, a photosensitive and pressure- sensitive thermally developable color photosensitive material having sensitivity respectively effective in the vicinity of wavelengths of 680nm, 560nm and 500nm is used. Since a PLZT array 203 changes in a transmitting spectral characteristic by the change in the voltage applied to a power source 206, by controlling the voltage applied to the PLZT array 203 by a control apparatus 207, said array acts as a filter and the light having a wavelength reaching a condensing lens array 202 from a lamp 201 can be selected. Therefore, by transmitting the light of the wavelength corresponding to the sensitivity of the photosensitive material by controlling the voltage applied to the PLZT array 203 at every pixel, a color image can be exposed.</p> |
