Light modulator having digital micro blaze diffraction grating

A light modulator having a digital micro blaze diffraction grating, comprising:

• a substrate;
• a pair of supporting members displaced on the substrate, and spaced apart from each other;
• a plurality of diffraction members having a band shape, which are connected to the supporting members at both ends thereof so as to be suspended on the substrate, are arranged parallel to each other, and have reflective surfaces for reflecting incident light on upper sides thereof;
• a plurality of protrusions, each of which is provided on an edge of a lower surface of a corresponding one of the diffraction members so that the reflective surfaces of the diffraction members incline when the diffraction members are drawn downward;
• and
• a plurality of driving units, which moves the diffraction members upward or downward so that the reflective surfaces of the adjacent diffraction members are situated at a first position, in which the reflective surfaces form a flat mirror, or at a second position, in which the reflective surfaces diffract the incident light.