复眼透镜提高液晶投影照明系统的能量利用率

照明系统是液晶投影仪的重要组成部分．它将直接影响到投影仪的光能利用率以及色彩等系统性能。对于复眼照明系统，复眼透镜的良好设计可以大人提高系统的能量利用率。在对液晶投影照明系统的原理进行分析的基础上，提出了两种复眼透镜的设计方案。两种方案均采用矩形子复眼，便于设计和加工。通过对复眼透镜中每个子复眼进行偏心以及改变其形状大小来提高系统能量利用率。计算机模拟结果表明，两种设计方案与传统设汁相比，在光能利用率上分别提高了16．5％和26．3%，并且具有较高的均匀性。最后，还对两种复眼透镜的设计方案进行了分析和比较。

Fly Eye Lens Array Used in Liquid Crystal Projection Display with High Light Efficiency

Illumination system is a main part in liquid crystal projection display system, and is important to color fidelity and other performance of a projector. As for fly eye illumination system, the light efficiency would be dramatically increased, if the fly eyes lenses are well designed. Two designs of the fly eye lenses are introduced on basis of the analysis on liquid crystal projection displays. The sub-fly eyes in both designs are all rectangular, so they are easy to design and manufacture. The light efficiency could be increased by decentering the sub-fly eyes and changing their shapes. By simulation, the light efficiencies of these two designs are increased by 16.5% and 26.3% respectively. The illuminating light on liquid crystal panel has good uniformity. In the end, two designs are compared with each other.