An image forming apparatus includes a grating light valve (GLV) optical modulating device for modulating light projected by a monochromatic light source unit so that the light thus modulated is projected onto a photosensitive drum. This arrangement enables printing at a higher speed and high-quality...http://www.google.fr/patents/US6025859?utm_source=gb-gplus-shareBrevet US6025859 - Electrostatic printer having an array of optical modulating grating valves
Electrostatic printer having an array of optical modulating grating valves
