When a recording starting point of a color photosensitive material reaches a
position on which light beams are focused by a condenser lens and a reflecting
mirror, a light beam is emitted from a red organic EL element of a light source
by a controller, and red image data corresponding to a plurality of lines is transferred
to a DMD. In accordance with the image data, on-off control of micromirrors of
the DMD is carried out, and the red light beam emitted from the light source is
made incident on the DMD. When the micromirrors are on, the incident light beam
is reflected toward the reflecting mirror. The light beam is focused onto a recording
surface of the color photosensitive material by the condenser lens and the reflecting
mirror, and red exposure is carried out. Subsequently, green exposure and blue
exposure are carried out in the same way.
