The 20Z40DM.8 Laser Line Dielectric mirror is a highly efficient reflector optimized for a narrow 1520 to 1580 nm wavelength range. 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 DM.8 coating is designed for use with diode lasers and has a center wavelength of 1550 nm. The coating achieves greater than 99% reflectance, from 0–45° angle of incidence, for any polarization. This multilayer dielectric coating is extremely durable, making it resistant to damage from repeated cleaning. This mirror has a λ/20 surface flatness and a 10-2 surface quality.

• 波长区域

  IR

• 波长范围

  1520-1580 nm

• 镜片形状

  Round

• 直径

  50.8 mm  

• 材料

  Zerodur®

• 镀膜类型

  Laser Line Dielectric

• 镀膜代码

  DM.8

• 表面质量

  10-2 scratch-dig

• 表面平面度

  λ/20 at 632.8 nm

• 基板编号

  20Z40

• 入射角

  0-45°

• 通光孔径

  ≥central 80% of diameter

• S2 表面

  Ground

• 反射率

  Rs, Rp>99% @ 1520-1580 nm

• 厚度

  12.7 mm  

• 厚度公差

  ±0.25 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

• 损伤阈值

  500 W/cm2 CW, 2 J/cm2 for 10 nsec pulses

20 z40dm。8激光线介质镜是一种高效的反射镜，适用于1520 ~ 1580 nm波长范围。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。DM.8涂层是为二极管激光器设计的，中心波长为1550nm。反射涂层达到大于99%,从0-45°入射角,极化。这种多层介质涂层非常耐用，可以防止反复清洗造成的损坏。这个镜子λ/ 10 20表面平面度和表面质量。