The FIR-ND10 Infrared Neutral Density Filter is a 1 inch (25.4 mm) diameter infrared neutral density filter with an optical density of 1.0, and ±3% transmittance tolerance. Optimized for 2 to 5 μm, this filter attenuates IR radiation from 2 to 14 μm. It is made from a germanium substrate and is coated with a spectrally neutral vacuum deposited metal alloy reflective coating.

• 尺寸

  Ø25.4 mm

• 光学密度

  1

• 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

• 厚度

  1.0 mm

• 厚度公差

  ± 0.2 mm

• 镀膜类型

  Vacuum deposited metal alloy

FIR-ND10红外中性密度滤光片是一个1英寸(25.4毫米)直径红外中性密度滤光片的光学密度1.0±3%透光率宽容。为2至5μm优化,这个过滤器从2到14μm变弱红外辐射。它由锗基板制成，并涂有光谱中性真空沉积金属合金反射涂层。