利用ZEMAX光学软件设计了一款适用于部分2.03cm(0.8英寸)单片DLP投影机机型的短焦(广角)数字投影镜头。该镜头结构由10片透镜组成，具有结构简单、生产成本低、易加工等特点。镜头的全视场角2w达到80°，相对孔径约为1/2.1，有效焦距约为12.7mm，等效后截距约为37mm，其投射比约为0.78/1，即1m的投射距离可以投射出160.02cm(63英寸)的画面。镜头有较好的成像质量，在分辨率极限35lp/mm处，0.7视场以内的MTF值均大于0.35，在1/2分辨率极限处大部分视场的MTF值大于0.7，全视场畸变量的绝对值小于3%。

A short focal digital projection lens for 2.03cm DLP projectors was designed with ZEMAX. The structure is composed of ten lenses. Its production cost is low, and it is processed easily. The full FOV of the lens is 80°, the aperture is about 1/2.1, E.F.L is about 12.7mm, B.F.L is about 37mm, and projection ratio is about 0.78/1. Its MTF in all fields less than 28°is higher than 0.35 at the limiting spatial frequency of 35lp/mm. MTF in the most fields at half of the limiting spatial frequency is higher than 0.7. The absolute value of the full field of view distortion of the lens is less than 3%. The image quality of the lens is very good.