基于波分式3D技术成像原理,实现了一种宽角度互补三带通滤光膜的设计。通过对薄膜材料的研究,选择合适的材料作为法布里-珀罗滤光片的等效间隔层,改善了大角度入射时的能量分散现象,提高了大角度入射时的通带透过率。通过调节电感耦合等离子体反应气体量,降低了Nb₂O₅材料的消光系数,提高了薄膜在短波处的透过率。实验测试与分析结果表明,所研制的互补三带通滤光膜在0°~30°入射时的通带透过率均在92%以上,且透射光符合色平衡指标,满足设计要求。

A wide-angle complementary treble-bandpass filter is prepared based on the imaging principle of wavelength-division 3D technology. Via the investigation of film materials, suitable materials are selected as the equivalent spacer layer of the Fabry-Perot filter, which improves energy dispersion and enhance the bandpass transmissivity at a large incident angle of light. With the adjustment of the amount of the reactive gas of inductive coupled plasma, the extinction coefficient of Nb₂O₅ material can be reduced and the film transmissivity at a short wavelength can be enhanced. The experimental test and analysis results show that the prepared complementary treble-bandpass filters process the transmissivity of larger than 92% at each bandpass when light incident at 0°--30°. Moreover, the transmitted light satisfies the color balance index and meets the design requirements.