Patent ID: 6175431
Filing Date: 2001-01-16
Classification: G02B,H04N

Abstract:
A color filtering device comprising:holographic means positioned to intercept propagating polychromatic light for selectively diffracting particular color lights of said polychromatic light to a preselected destination, said color lights being associated with different wavelength ranges within the visible light spectrum, said holographic means including at least two reconfigurable holographic optical elements, each of said reconfigurable holographic optical elements having holographically recorded interference fringes to optically manipulate said particular color lights, each of said reconfigurable holographic optical elements being reconfigurable with respect to a diffractive characteristic in response to an applied electrical field, said reconfigurable holographic optical elements being positioned and oriented such that said polychromatic light is transmitted through more than one of said reconfigurable holographic optical elements.