The 30Z20AL.2 Broadband Metallic Mirror is an excellent general purpose, broadband reflectors. This 3 inch (76.2 mm) diameter mirror is made from a 14.7 mm thick Zerodur substrate. Zerodur is a glass-ceramic material where thermal expansion is nominally zero. This extra stability can be critical for applications requiring diffraction limited performance. 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 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

  Ø76.2 mm

• 材料

  Zerodur®

• 镀膜类型

  UV Enhanced Aluminum

• 镀膜代码

  AL.2

• 表面质量

  15-5 scratch-dig

• 表面平面度

  λ/10 at 632.8 nm

• 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

  14.7 mm  

• 厚度公差

  ±0.25 mm

• 直径

  76.2 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

30 z20al。2 .宽频金属镜是一种优良的通用宽频反射镜。这面直径3英寸(76.2毫米)的镜子是由14.7毫米厚的零调衬底制成的。零是一种热膨胀名义上为零的微晶玻璃材料。对于需要衍射限制性能的应用程序，这种额外的稳定性是至关重要的。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/今天比赛10表面平面度和表面质量。