The 20QS20 Shear Plate Collimation Tester is a 2.0 inch (50.8 mm) diameter wedged window that allows for quick testing of collimation by utilizing shearing interferometry. When the collimation tester is aligned at a 45° angle of incidence with respect to the incident beam, an interference pattern is formed. By adjusting the input beam condition and observing the fringe pattern, the collimation of the beam can be accurately obtained.

• 直径

  50.8 mm

• 材料

  UV Grade Fused Silica

• 波长范围

  195-2100 nm

• 表面平面度

  ≤λ/10 at 632.8 nm over the clear aperture

• 表面质量

  60-40 scratch-dig

• 厚度

  9.4 mm

• 厚度公差

  ±0.5 mm

• 倒角

  0.38–1.14 mm face width

• 倒角公差

  45° ±15°

• 通光孔径

  Central 80% of diameter

• 直径公差

  +0/-0.25 mm

• 增透膜

  Uncoated

• 楔形

  4.4 ± .88 arc sec

20QS20剪切板准直测试仪是一个直径为2.0英寸(50.8毫米)的楔形窗口，允许使用剪切干涉测量法快速测试准直。当准直试验机对齐在45°入射角对入射电子束,形成干涉图样。通过调节入射光束条件，观察条纹图样，可以精确地得到光束的准直。