Patent ID: 7149028

Claim:
A transmissive-diffractive light modulator, comprising: a substrate made of a transparent material; a plurality of upper reflective plates being arranged on the substrate to be spaced apart from each other at predetermined intervals and each having a ribbon shape, each of the upper reflective plates being attached at both ends thereof to the substrate while being spaced at an intermediate portion thereof from the substrate and being vertically movable at the intermediate portion thereof, with a reflective lower surface provided on each of the upper reflective plates to reflect or diffract incident light; a plurality of lower reflective plates attached to predetermined positions of the substrate at which the plurality of upper reflective plates are spaced from the substrate, so as to reflect or diffract the incident light, the plurality of lower reflective plates being spaced apart from each other at predetermined intervals; and an actuating unit to move the plurality of upper reflective plates vertically.