Patent ID: 6674579
Filing Date: 2004-01-06
Classification: G02B,H04N

Abstract:
A method of primary color correction to obtain â€œwhiteâ€  point color control in an optical system, comprising the steps:passing a beam of light for which color correction is desired in an optical path extending through a pre-polarizer to partially polarize said light beam; said polarized beam of light having a first primary color of a lesser supply and two primary colors in a greater supply in said polarized beam of light; passing said polarized beam of light through a polarization modulator that independently changes the degree of polarization of selected portions of said two primary colors in greater supply without substantially changing the polarization of said primary color in lesser supply; independently varying the degree of polarization of said selected portions of said two primary colors in greater supply to selectively control the color supply thereof; and passing said color controlled polarized beam of light through a second polarizer.