红外中性密度滤波片,IR ND滤光片

Andover红外ND滤光片提供三种标准尺寸:直径12.5mm、25mm和50mm。红外中性密度滤波片可以生产定制的尺寸，以及定制的光谱特性。

所属品牌：

产品介绍

红外中性密度滤光片（IR Neutral Density Filters）又被称为红外衰减片，顾名思义，是一种专为红外光谱区间设计的光学滤光片。Andover红外中性密度滤光片从基板上的金属合金涂层中获得光密度，该涂层由波长区域决定。与全电介质或吸收型不同，金属型Andover红外衰减片采用吸收和反射的组合来降低光的强度，而不会改变光的色彩平衡或波长组成。这意味着无论红外光的波长如何，Andover红外中性密度滤光片都会以相同的比率减少其能量。因此，Andover红外ND滤光片具有出色的光谱中性特性。

红外ND滤波片的标准品：

型号	波长范围（nm）	尺寸（mm）	厚度（mm）	Scratch-Dig	OD	平面度
030FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	0.3	5 or better at of Interest
030FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.3	5 or better at of Interest
030FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.3	5 or better at of Interest
030FNIR-BBAR-25	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.3	5 or better at of Interest
030FNIR-BBAR-50	2000-14000	25.0 +0/-0.2	1.0±-0.2	80/50	0.3	5 or better at of Interest
050FNIR-12.5	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.5	5 or better at of Interest
050FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.5	5 or better at of Interest
050FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.5	5 or better at of Interest
050FNIR-BBAR-25	5200-7000	25.0 +0/-0.2	1.0±0.2	80/50	0.5	≤ 5 waves at 5800nm
050FNIR-BBAR-50	5200-7000	50.0 +0/-0.2	1.0±0.2	80/50	0.5	≤ 5 waves at 5800nm
060FNIR-12.5	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.6	≤ 5 waves at 5800nm
060FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.6	≤ 5 waves at 5800nm
060FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.6	≤ 5 waves at 5800nm
070FNIR-12.5	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.7	5 or better at of Interest
070FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.7	5 or better at of Interest
070FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.7	5 or better at of Interest
080FNIR-12.5	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.8	5 or better at of Interest
080FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.8	5 or better at of Interest
080FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.8	5 or better at of Interest
090FNIR-12.5	2000-14000	12.5 +0/-0.2	1.0±0.2	80/50	0.9	5 or better at of Interest
090FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	0.9	5 or better at of Interest
090FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	0.9	5 or better at of Interest
100FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	1.0	≤ 5 waves at 5800nm
100FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	1.0	≤ 5 waves at 5800nm
100FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	1.0	≤ 5 waves at 5800nm
100FNIR-BBAR-25	5200-7000	25.0 +0/-0.2	1.0±0.2	80/50	1.0	≤ 5 waves at 5800nm
100FNIR-BBAR-50	5200-7000	50.0 +0/-0.2	1.0±0.2	80/50	1.0	≤ 5 waves at 5800nm
130FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	1.3	≤ 5 waves at 5800nm
130FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	1.3	≤ 5 waves at 5800nm
130FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	1.3	≤ 5 waves at 5800nm
150FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	1.5	≤ 5 waves at 5800nm
150FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	1.5	≤ 5 waves at 5800nm
150FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	1.5	≤ 5 waves at 5800nm
150FNIR-BBAR-25	5200-7000	25.0 +0/-0.2	1.0±0.2	80/50	1.5	≤ 5 waves at 5800nm
150FNIR-BBAR-50	5200-7000	50.0 +0/-0.2	1.0±0.2	80/50	1.5	≤ 5 waves at 5800nm
200FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	2.0	≤ 5 waves at 5800nm
200FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	2.0	≤ 5 waves at 5800nm
200FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	2.0	≤ 5 waves at 5800nm
200FNIR-BBAR-25	5200-7000	25.0 +0/-0.2	1.0±0.2	80/50	2.0	≤ 5 waves at 5800nm
200FNIR-BBAR-25	5200-7000	50.0 +0/-0.2	1.0±0.2	80/50	2.0	≤ 5 waves at 5800nm
250FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	2.5	≤ 5 waves at 5800nm
250FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	2.5	≤ 5 waves at 5800nm
250FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	2.5	≤ 5 waves at 5800nm
300FNIR-12.5	2000-14000	12.5+0/-0.2	1.0±0.2	80/50	3.0	≤ 5 waves at 5800nm
300FNIR-25	2000-14000	25.0 +0/-0.2	1.0±0.2	80/50	3.0	≤ 5 waves at 5800nm
300FNIR-50	2000-14000	50.0 +0/-0.2	1.0±0.2	80/50	3.0	≤ 5 waves at 5800nm
300FNIR-BBAR-25	5200-7000	25.0 +0/-0.2	1.0±0.2	80/50	3.0	5 or better at of Interest
300FNIR-BBAR-50	5200-7000	50.0 +0/-0.2	1.0±0.2	80/50	3.0	5 or better at of Interest

红外中性密度滤波片在2-14μm的透过率曲线

Andover中性密度滤波片提供三种标准尺寸的滤波片：12.5mm、25mm和50mm直径，具有统一的中心厚度1mm。红外ND滤波片的基材是锗，有效孔径为光学直径（Outer Diameter, OD）的90%。Andover中性密度滤波片的平整度<5 waves per 25mm，这是一个比较严格的平整度要求，表明该红外中性密度滤光片在其表面上的任意25mm长度内，最高点与最低点之间的高度差不超过5个光波长度。Andover红外ND滤光片的平行度为10 arc minutes or better，即小于10弧分，偏离角度不会超过0.1667度，并且实际性能很可能会更加接近完美平行。此外Andover还可以根据客户的需求定制不同尺寸、不同光学特性的IR ND滤光片。