The FIR-IR is a Infrared ND Filter Set of 25.4 mm diameter filters and includes: 0.3, 0.6, 1.0, 2.0 & 3.0 OD Filters. Optimized for 2 to 5 μm, these filters attenuate IR radiation from 2 to 14 μm. These one-inch diameter filters are made from germanium substrates coated with a spectrally neutral vacuum deposited metal alloy reflective coating.

• 尺寸

  Ø25.4 mm

• 波长范围

  2000-5000 nm

• 材料

  Optical grade germanium

• 尺寸公差

  ±0.2 mm

• 表面质量

  80-50 scratch-dig

• 平行度

  3 to 5 arc min (0.8 to 1.5 mrad)

• 通光孔径

  All but 1.5 mm outer rim

• 镀膜类型

  Vacuum deposited metal alloy

ir是一套直径25.4 mm的红外ND滤波器，包括:0.3、0.6、1.0、2.0、3.0 OD滤波器。为2至5μm优化,这些过滤器从2到14μm减弱红外辐射。这些一英寸直径的过滤器是由锗基片涂覆光谱中性真空沉积金属合金反射涂层制成的。