The 20D20DM.4 Laser Line Dielectric mirror is a highly efficient reflector optimized for the 632.8 nm wavelength. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The DM.4 coating is designed for use with HeNe lasers and has a center wavelength of 632.8 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/10 surface flatness and a 15-5 surface quality.

• 波长区域

  VIS

• 波长范围

  632.8 nm

• 镜片形状

  Round

• 直径

  50.8 mm  

• 材料

  Borofloat® 33

• 镀膜类型

  Laser Line Dielectric

• 镀膜代码

  DM.4

• 表面质量

  15-5 scratch-dig

• 表面平面度

  λ/10 at 632.8 nm

• 基板编号

  20D20

• 入射角

  0-45°

• 通光孔径

  ≥central 80% of diameter

• S2 表面

  Ground

• 反射率

  Rs, Rp>99% @ 632.8 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

20 d20dm。4 .激光线介质镜是针对632.8 nm波长优化的高效反射镜。这个2英寸(50.8毫米)直径镜子是用12.7毫米厚Borofloat®33衬底。硼泥热膨胀率低，是大多数应用的优良基体。DM.4涂层用于HeNe激光器，中心波长为632.8 nm。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/今天比赛10表面平面度和表面质量。