Evaluation of LC Fresnel Phase Plate Utilized as Colour Filter

A method to decompose the white light into three primary colours was proposed. The switchable Fresnel Phase Plate (FPP) containing liquid crystal could be utilized as colour filters to form sub-pixels. Some optical properties of such device were estimated by means of Kirchhoff diffraction equation which is scale wave equation derived from Helmholtz's equation. The performance of LC-FPP and conventional colour filter was compared. Other configuration of LC-FPP was concerned. And some experiments were done to verify the theoretical calculation.