Dual -purpose band pass filter of absorption type day night

The utility model discloses a dual -purpose band pass filter of absorption type day night aims at providing daytime formation of image clear, colour cast and have the low angle effect not, can satisfy the dual -purpose band pass filter of absorption type day night of formation of image in evening simultaneously again. And comprises a base plate, substrate material is blue glass, and one side coating of base plate has and has absorption characteristic and have a high coated material layer of passing through the characteristic at the infrared band at the visible light wave band, and the opposite side of base plate has plated binary channels optical filtering rete, coated material layer surface is equipped with and subtracts anti - rete. 本实用新型公开了种吸收型日夜两用带通滤光片，旨在提供种白天成像清晰、不偏色且具有低角度效应，同时又能满足晚上成像的吸收型日夜两用带通滤光片。它包括基板，所述基板材料为蓝玻璃，基板的侧涂覆有在可见光波段具有吸收特性并且在红外波段具有高透特性的涂覆材料层，基板的另侧镀有双通道滤光膜层，所述涂覆材料层表面设有减反膜层。