Patent ID: 6137635
Filing Date: 2000-10-24
Classification: G02B,H04N

Abstract:
A projector apparatus comprising:three optical modulators, each for modulating a different color component light beam with image information for said color component;a beam combining optical system which synthesizes the output from the three optical modulators into a combined beam;a projection lens that is approximately telecentric on its reduction side and which magnifies and projects the output from the beam combining optical system onto a screen; anda transparent plate, positioned between an optical modulator for at least one of the different color component light beams and the beam combining optical system, said transparent plate being of a thickness to correct the on-axis chromatic aberration that occurs for the color component in which said plate is positioned, wherein only one transparent plate is provided, and said plate is positioned between an optical modulator that modulates red-colored light and said beam combining optical system.