The 20D20ER.2-PF Pinhole Free Broadband Metallic Mirror was developed to be virtually free of pinholes. Tiny pinholes in a metallic coating can increase scatter from a mirror. It is ideal for sensitive applications requiring an economical broadband reflector. 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 ER.2-PF protected silver coating is composed of a low emissivity silver film fully encapsulated by a multilayer dielectric stack to prevent oxidation. This coating has excellent broadband reflectivity in the IR, while maintaining very good performance in the visible and near IR. Average reflectivity is greater than 96% from 480–1100 nm and greater than 98.5% from 1.1–20 μm. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

• 波长区域

  Broadband

• 波长范围

  480-20000 nm

• 镜片形状

  Round

• 镜片尺寸

  Ø50.8 mm

• 材料

  Borofloat® 33

• 镀膜类型

  Protected Silver

• 镀膜代码

  ER.2-PF

• 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

  0-15°

• 通光孔径

  ≥central 80% of diameter

• S2 表面

  Ground

• 反射率

  Ravg>96%, Rmin>93% @ 480-1100 nm Ravg>98.5%, Rmin>97% @ 1.1-20 µm

• 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 d20开头。2-PF无针孔宽频带金属反射镜已发展到几乎无针孔。金属涂层上的小针孔会增加镜面的散射。这是理想的敏感应用需要一个经济的宽带反射。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。2- pf防护银镀层由低发射率的银膜组成，该银膜被多层介质堆叠完全包裹，以防止氧化。该涂层在红外光谱中具有良好的宽带反射率，同时在可见光和近红外光谱中保持了良好的性能。平均反射率大于96%在480 - 1100海里,从-20年1.1μm大于98.5%。这个镜子λ/今天比赛10表面平面度和表面质量。