The 40D20AL.2 Broadband Metallic Mirror is an excellent general purpose, broadband reflectors. This 4 inch (101.6 mm) diameter mirror is made from a 17.7 mm thick Borofloat® 33 substrate. Borofloat® 33 has low thermal expansion and is an excellent substrate for most applications. The AL.2 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 20-10 surface quality.

• 波长区域

  UV

• 波长范围

  250-600 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø101.6 mm

• 材料

  Borofloat® 33

• 镀膜类型

  UV Enhanced Aluminum

• 镀膜代码

  AL.2

• 表面质量

  20-10 scratch-dig

• 表面平面度

  λ/10 at 632.8 nm

• 基板编号

  40D20

• 入射角

  0-45°

• 通光孔径

  ≥central 80% of diameter

• S2 表面

  Ground

• 反射率

  Ravg>90% @ 250-600 nm

• 损伤阈值

  2 J/cm² with 10 ns pulses at 355 nm, 20Hz

• 厚度

  17.7 mm  

• 厚度公差

  ±0.25 mm

• 直径

  101.6 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

40 d20al。2 .宽频金属镜是一种优良的通用宽频反射镜。这4英寸(101.6毫米)直径镜子是用17.7毫米厚Borofloat®33衬底。Borofloat®33有低的热膨胀和是一个很好的衬底对于大多数应用程序。AL.2 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/ 20 - 10表面平面度和表面质量。