Abstract There are three projection displays technologies in industry, including LCD,LCOS ,and DMD light-valve projector. Portative projection display will become main stream in market .In this thesis ,using a optical simulation program ,Zemax, to release the optical projector seidel Aberrations and the chromatic Aberrations。The modifying of a patent US4726667, which the LCD projector larger semi-diameter contacted to portative projection lens special specification and used two aspheric surfaces to optimize aberrations balance and approach solution fast.