| 摘要 |
PURPOSE:To attain a high contrast clear image by a method wherein a photochromic material is placed between a non-light emitted display device forming transparent light into an image form in response to a digital image information and a photosensitive material. CONSTITUTION:Exposed light from an exposure light source is shielded or transmitted for every image so as to form an image with a liquid crystal mask 12 of transparent type having many pixels and then light passed through the liquid crystal mask 12 is projected against a photochromic material 14. The photochromic material 14 becomes transparent where light passed through the liquid crystal mask directly impinges against the photochromic material 14 and its amount of light is attenuated at another place where the liquid impinges indirectly against the photochromic material 14. The place where no light impinges is opaque or in a dark color. Accordingly, light passed through the liquid crystal mask 12 is intensified at its contrast with the photochromic material 14 and further projected onto the photosensitive material. With such an arrangement, it is possible to get a clear image of high contrast. |
