The SAW28 is a Sapphire Window, 38.10 mm in diameter and 1.00 mm thick, uncoated. Sapphire windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. Sapphire, a single crystal form of Al2O3, is resistant to attack by strong acids due to its high dielectric constant. It has high compressive strength and a high melting point. It is also resistant to UV radiation darkening. Please note these sapphire windows are provided in random axis orientation by default and its birefringent nature could affect the polarization state of your application.

• 直径

  38.1 mm

• 材料

  Sapphire

• 增透膜

  Uncoated

• 表面平面度

  λ/4 @ 633 nm

• 表面质量

  80-50 scratch-dig

• 厚度

  1.0 mm  

• 厚度公差

  ± 0.05 mm

• 平行度

  ≤3.5 arc min

• 清洁

  See How to Clean Optics

• 通光孔径

  Central 90% of diameter

• 直径公差

  ± 0.25 mm

• 双折射

  0.008 for visible light orthogonal to optical axis

• 边缘处理

  Ground and beveled

• 表面粗糙度

  0.1 µm per inch

• 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

• 
  

SAW28是一扇蓝宝石窗，直径38.10毫米，厚1.00毫米，没有涂层。蓝宝石玻璃适用于高压、真空或腐蚀性空气的场合。蓝宝石是Al2O3的一种单晶形式，由于其高介电常数，所以能抵抗强酸的攻击。具有较高的抗压强度和较高的熔点。它还能抵抗紫外线辐射。请注意，这些蓝宝石窗口在默认情况下以随机轴方向提供，其双折射性质可能会影响应用程序的偏振状态。