The 20Z40ER.1 Broadband Metallic Mirror is an excellent general purpose, broadband reflectors. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 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 ER.1 enhanced aluminum coating may be used wherever a broadband visible and near infrared reflector is needed. A multilayer dielectric stack deposited over the aluminum film boosts reflectance and improves the durability of the coating. Average reflectivity is greater than 93% from 450–700 nm. This mirror has a λ/20 surface flatness and a 10-2 surface quality.

• 波长区域

  VIS

• 波长范围

  450-700 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø50.8 mm

• 材料

  Zerodur®

• 镀膜类型

  Enhanced Aluminum

• 镀膜代码

  ER.1

• 表面质量

  10-2 scratch-dig

• 表面平面度

  λ/20 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>93%, Rmin>90 % @ 450-700 nm

• 损伤阈值

  0.5 J/cm² with 10 ns pulses at 532 nm, 20Hz

• 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 z40er。宽带金属镜是一种性能优良的通用宽带反射镜。这面直径2英寸(50.8毫米)的镜子是由12.7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。ER.1增强铝涂层可用于需要宽带可见和近红外反射器的任何地方。沉积在铝膜上的多层介质堆叠可以提高反射率，提高涂层的耐久性。在450-700 nm范围内，平均反射率大于93%。这个镜子λ/ 10 20表面平面度和表面质量。