ANTI-ALIASING PROJECTION LENS

摘要

The present invention provides a projection lens set for projecting a video signal of an optical display device. The lens set has a Modulus of the Optical Transfer Function at the Nyquist frequency for the video signal and a Modulus of the Optical Transfer Function at twice the Nyquist frequency for the video signal, such that the Modulus of the Optical Transfer Function at the Nyquist frequency has at least twice the value of the Optical Transfer Function at twice the Nyquist frequency.