The 20SW8-180 is a Sapphire Window, 50.80 mm in diameter and 2.00 mm thick. Sapphire windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. The raw material has negligible lattice distortion and is oriented with the optical axis normal to the faces to minimize the inherent birefringent properties of single crystal sapphire.

• 直径

  50.8 mm

• 材料

  Sapphire

• 增透膜

  Uncoated

• 表面平面度

  λ/4 @ 633 nm

• 表面质量

  40-20 scratch-dig

• 厚度

  2.0 mm  

• 平行度

  ≤3 arc min

• 清洁

  See How to Clean Optics

• 通光孔径

  Central 80% of diameter

• 直径公差

  +0/-0.25 mm

• 边缘处理

  Ground and beveled

• 热膨胀系数

  8.4 x 10-6 K-1

• 热极限

  22 W m-1 K-1

• 波长范围

  150 to 5000 nm

20SW8-180是一个蓝宝石窗，直径50.80毫米，厚2.00毫米。蓝宝石玻璃适用于高压、真空或腐蚀性空气的场合。该材料的晶格畸变可以忽略不计，且光轴垂直于表面，使单晶蓝宝石固有的双折射性能降到最低。