| http://www.w3.org/ns/prov#value | - In order to solve the problem, the present invention is a multi-level optical writer for writing an image by illumination to an optical-write-type recording medium laid with a display layer having a memory nature and a photoconductive layer, the optical writer including: a write section for writing a multi-level image to the display layer by illuminating, to the photoconductive layer, image light
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