SHUTTER ARRAY

PURPOSE:To reduce electric power consumption by electrifying an oscillation diaphragm having a specular surface existing in an optical path form a light source to a photosensitive surface or impressing a voltage thereto and applying electrostatic attraction force or electrostatic repulsive force between said diaphragm and another electrode facing the same in proximity thereto. CONSTITUTION:Light emitted from a fluorescent tube 1 is collected by a condenser lens 2 and is stopped by a collimator 2a. The light is reflected by the movable electrode 3 of a shutter element and is irradiated through a lit 5 to photosensitive agent coated paper 6. A roller 7 for a platen to support the paper is provided. A weak AC power is applied to the electrode 4 so that the movable electrode 3 is kept slightly oscillated, then the deviation in the neutral position of the optical axis and the movable electrode is negligible and the shutter array is made advantageous for a change of lapse of time. The two electrodes attract to or repulse from each other to deform the movable electrode 3 when the voltage is impressed to the electrode 4 or the movable electrode 3 or said electrode is electrified. As a result, the optical path changes from the state (a) to the state (b) or (c) and the light no longer passes the slit 5, so that the photosensitive agent coated paper 6 is not exposed.