The 20LP-NIR Precision Linear Polarizers is constructed by laminating a polymer polarizing film between two high-precision glass or fused silica windows. Each window has a high-efficiency 1100 to 1750 nm broadband NIR antireflection coating. The assembly is mounted in a 2 inch (50.8 mm) diameter black anodized aluminum housing for protection and provides a 30.5 mm clear aperture. The transmission axis is clearly marked. The result is a linear polarizer with high transmission and low wavefront distortion that are easy to mount.

• 直径

  50.8 mm  

• 波长范围

  1100-1750 nm

• 材料

  Grade A N-BK7

• 偏振材料

  Polymer film

• 消光比

  1,000:1

• 损伤阈值

  1 W/cm2 CW, 0.2 J/cm2 with 20 nsec pulses, visible, typical

• 反射率

  Ravg <0.5 %, 1100-1750 nm

• 表面质量

  40-20 scratch-dig

• 通光孔径

  30.5 mm

• 直径公差

  ±0.13 mm

• 透射光束偏移

  ≤2 arc min

• 波前畸变

  ≤ λ/2 at 632.8 nm over the clear aperture

• 非偏振光透射率，平行对

  H0 >18%

• 非偏振光透射率，单片

  TT >29%

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20LP-NIR精密线性偏振器是通过在两个高精度玻璃或熔融二氧化硅窗口之间夹覆一层聚合物偏振膜来实现的。每个窗口都有一个高效的1100至1750纳米宽带近红外防反射涂层。该总成安装在直径为2英寸(50.8 mm)的黑色阳极氧化铝外壳中，用于保护，并提供30.5 mm的透明孔径。传动轴标记清楚。结果是一种高透射、低波前畸变、易于安装的线性偏振器。