Exposure device with spatial light modulator and neutral density filters

Exposure device for writing mixed data onto a photosensitive support comprising:

• a light source, supplying an exposure light,
• a first two-dimension pixel matrix modulator, and
• a neutral optical filter means having at least two different optical densities, the modulator and the filter being arranged in series on an optical path of the exposure light coming from the source,
• wherein the filter means comprises at least two optical filters with different optical density, and a mechanism to selectively insert one of the filters into the exposure light's optical path, and
• wherein each optical filter of the filter means has a uniform density.