提出一种新型的白光准直器, 它由梯度折射率光纤及光阑组成的微阵列构成。 在研究其准直原理及理论计算基础上, 讨论了材料和结构参数对准直特性的影响。 实验结果表明, 选择合适的参数, 可获得发散角小于±10°的近准直光, 该种准直器可满足扩展液晶显示器(LCD)视角对准直背光源的需求。

A new collimator is invented which is consisted of the graded-refractive-index(GRIN)-rod microarrays and diaphragm microarrays. The optical principle and the effects of material and structural parameters on collimating properties are studied theoretically. The results of calculation and preliminary experiments show that the quasi-collimating light with the low diffuse angle and small chromatism can be obtained when the parameters are chosen appreciatively. The collimator can meet the needs of collimating backlight of LCD.