The 40D20ER.4 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.4 protected gold coating is ideal for applications requiring broadband reflectance in the near IR to the far IR. A multilayer dielectric overcoat provides protection to the gold from the environment. Average reflectivity is greater than 96% from 650–1700 nm and greater than 98% from 1.7–20 μm. This mirror has a λ/10 surface flatness and a 20-10 surface quality.

• 波长区域

  Broadband

• 波长范围

  650-20000 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø101.6 mm

• 材料

  Borofloat® 33

• 镀膜类型

  Protected Gold

• 镀膜代码

  ER.4

• 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>96%, Rmin>92% @ 650-1700 nmRavg>98%, Rmin>96% @ 1.7-20 µm

• 损伤阈值

  0.5 J/cm² with 10 ns pulses at 1064 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。4 .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。该ER.4保护金涂层是理想的应用需要宽带反射在近红外到远红外。多层介质涂层可以保护黄金不受环境影响。平均反射率大于96%在650 - 1700海里,从-20年1.7μm大于98%。这个镜子λ/ 20 - 10表面平面度和表面质量。