Patent ID: 8854720

Claim:
A tri wavelength diffraction modulator, comprising: a stationary substrate with a bottom electrode plate formed on top of the stationary substrate; a first electrode plate comprising a first suspended beam suspended in parallel above the stationary substrate and a first connection anchored onto the stationary substrate; and a second electrode plate comprising a second suspended beam suspended in parallel above the first electrode plate and a second connection anchored onto the stationary substrate, wherein: the second suspended beam of the second electrode plate comprises a reflecting layer, a dielectric layer, and at least one micro aperture opened in the reflecting layer; and the stationary substrate comprises a driving circuitry built inside the stationary substrate, the driving circuitry being adapted to provide electrical charge to the bottom electrode plate, the first electrode plate and the second electrode plate, respectively, so as to remain a relax distance, a pull-close distance and a pull-apart distance between the first suspended beam and the second suspended beam, respectively, within different time durations; the pull-close distance being adapted to make illumination of a first wavelength in incident illumination pass through the micro aperture to form diffraction, the relax distance being adapted to make illumination of a second wavelength in the incident illumination form diffraction, and the pull-apart distance being adapted to make illumination of a third wavelength in incident illumination form diffraction.