Optical system for a three-tube projection television set

摘要

A three-tube color projection television. The outside projection optics are arranged so that a single part can be produced for use in projection televisions of diverse screen size. An image surface correcting lens is at a fixed angle with respect to the face of a projecting tube. The fixed angle corresponds to the Scheimpflug angle of one screen size. A focusing lens is at an adjustable angle with respect to the image surface correcting lens, thereby allowing overall angle adjustment and use of the part in projection televisions of diverse screen size.