The 50Q04AV.2 is a circular variable metallic neutral density filter, made of UV grade fused silica, 127 mm in diameter, surface flatness of ≤1λ/2, and coated for an OD range of 0.05-2.0.


Our circular variable neutral density filters are designed to simplify attenuation and beam splitting in the visible to NIR. The variable attenuation and beam splitting around a 270° circle is achieved by a thin, reflective aluminum film. A broadband, visible AR coating on the back side allows the filter to be left in the beam path at all times with minimal losses or ghost images. Circular variable ND filters are available with BK 7 substrates for general laboratory use, or UV fused silica substrates for maximum thermal stability.

• 尺寸

  Ø127.0 mm

• 光学密度

  0.05 - 2

• 光学密度公差

  ±0.15 over 270° at 0° AOI

• 材料

  UV Grade Fused Silica

• 耐用性

  Metalized area MIL-M-13508C, AR coated area MIL-C-675, moderate abrasion

• 尺寸公差

  +0/-0.25 mm

• 表面平面度

  ≤λ/2

• 表面质量

  30-10 scratch-dig

• 倒角

  0.50–1.52 mm face width

• 倒角公差

  45° ±15°

• 清洁

  See How to Clean Optics

• 通光孔径

  From 33 mm to 101 mm diameter

• 损伤阈值

  75 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at the specified wavelength, typical

• 厚度

  9.53 mm

• 厚度公差

  ±0.38 mm

• 内径

  25.4 mm  

50 q04av。2是一个循环变量金属中性密度滤光片,由紫外线等级熔融石英,直径127毫米,表面平面度≤1λ/ 2,涂的OD 0.05到-2.0之间。

我们的圆形可变中性密度过滤器的设计，以简化衰减和光束分裂在可见的近红外。可变衰减和光束分裂270°循环是通过薄,反光铝膜。在背面的宽带，可见的AR涂层允许过滤器被留在光束路径在任何时候以最小的损失或鬼图像。圆形可变ND过滤器可与bk7衬底用于一般实验室，或紫外熔融硅衬底用于最大的热稳定性。