PROJECTION OPTICAL SYSTEM, PROJECTION TELEVISION AND METHOD FOR FABRICATING LENSES OF PROJECTION OPTICAL SYSTEM FOR IMPROVING COLOR PURITY

摘要

PURPOSE: A projection optical system, a projection television and a method for fabricating lenses of the projection optical system are provided to increase transmissivity of desired colors by forming a color filter coating layer, to thereby improve color purity. CONSTITUTION: A projection optical system(30) is constructed such that a plurality of lenses(31,33,36,37) are arranged to project a plurality of color beams on a screen. A color filter coating layer(35) that absorbs at least one of the plurality of color beams is formed on the surface of at least one of the plurality of lenses. The color filter coating layer is formed of a UV hardening resin or a thermal-hardening resin.