Imaging apparatus

Imaging apparatus for exposing a recording medium, said apparatus comprising:

• a light source;
• a light-valve array for receiving light from said source, said array comprising a plurality of light valves, each of said light valves including an electrostatically deflectable element having a transmitter waveguide thereon and a stationary element having a receptor waveguide thereon, said deflectable element having an initial position in which a beam of light can be transmitted from said transmitter waveguide to said receptor waveguide and said waveguides are axially aligned, said deflectable element being movable from the initial position through a series of positions in which progressively less light can be transmitted to the receptor waveguide and to a fully-deflected position in which no light can be transmitted, each of said elements being selectively deflectable in response to an information signal;
• optical means for receiving beams from said elements and for imaging said beams on said recording medium;
• and
• control means connected to said elements for controlling the deflection thereof in accordance with an information signal which contains gray-scale information.