The 20D20AL.2-PF Pinhole Free Broadband Metallic Mirror was developed to be virtually free of pinholes. Tiny pinholes in a metallic coating can increase scatter from a mirror. It is ideal for sensitive applications requiring an economical broadband reflector. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The AL.2-PF UV enhanced aluminum coating is a durable, broadband UV reflector with average reflectivity greater than 90% from 250–600 nm. The aluminum film is overcoated with UV transparent magnesium fluoride to prevent oxidation of the metal. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

• 波长区域

  UV

• 波长范围

  250-600 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø50.8 mm

• 材料

  Borofloat® 33

• 镀膜类型

  UV Enhanced Aluminum

• 镀膜代码

  AL.2-PF

• 表面质量

  15-5 scratch-dig

• 表面平面度

  λ/10 at 632.8 nm

• 基板编号

  20D20

• 入射角

  0-15°

• 通光孔径

  ≥central 80% of diameter

• S2 表面

  Ground

• 反射率

  Ravg>90% @ 250-600 nm

• 厚度

  12.7 mm  

• 厚度公差

  ±0.25 mm

• 直径

  50.8 mm  

• 直径公差

  +0/-0.13 mm

• 倒角

  0.38–1.14 mm face width

• 倒角公差

  45° ±15°

• 清洁

  See How to Clean Optics

20 d20al。2-PF无针孔宽频带金属反射镜已发展到几乎无针孔。金属涂层上的小针孔会增加镜面的散射。这是理想的敏感应用需要一个经济的宽带反射。这个2英寸(50.8毫米)直径镜子是用12.7毫米厚Borofloat®33衬底。硼泥热膨胀率低，是大多数应用的优良基体。AL.2-PF UV增强铝涂层是一种耐用的宽带UV反射器，平均反射率在250-600 nm范围内大于90%。铝膜上覆盖了紫外透明氟化镁，防止金属氧化。这个镜子λ/今天比赛10表面平面度和表面质量。