Projection television receiver having dichroic mirrors and a projecting lens with three different focal points

摘要

Apparatus is provided for projecting a television image to a distant screen using a lens which is not color corrected. Three separate images of different primary colors are produced by three kinescopes. The images are directed by a set of dichroic mirrors to a projection lens. A single image is thereafter projected by the lens to a distant screen. Color correction of the optics is achieved by altering the relative position of the kinescopes with respect to the dichroic mirror assembly and altering the magnitude of deflection signals supplied to each kinescope.