The 40D20ER.1 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 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/10 surface flatness and a 20-10 surface quality.

• 波长区域

  VIS

• 波长范围

  450-700 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø101.6 mm

• 材料

  Borofloat® 33

• 镀膜类型

  Enhanced Aluminum

• 镀膜代码

  ER.1

• 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>93%, Rmin>90 % @ 450-700 nm

• 损伤阈值

  0.5 J/cm² with 10 ns pulses at 532 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 d20开头。宽带金属镜是一种性能优良的通用宽带反射镜。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。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/ 20 - 10表面平面度和表面质量。