The T81-20X Laser Beam Expander provides a low cost means of focusing and shaping laser beams with a high degree of accuracy. This Galilean 20X beam expanders incorporate the highly regarded Tropel optical designs with improved adjustability and mounting. They are ideal for applications in which a small spot must be formed at some distance from the laser, or where the collimation range must be extended for illumination, or for alignment of distant objects. Wavefront distortion of less than λ/4 guarantees a minimum focused spot size even at long ranges. The lenses are antireflection coated with magnesium fluoride optimized for 632.8 nm, yielding transmission of over 95%. The T81-20X has an expansion ratios of 20x and a means for continuous focus change. As the power increases, the beam divergence decreases proportionately, providing a greater collimation range. These beam expanders can be conveniently attached to most HeNe lasers with the 1-32 accessory thread and are equipped with precision beam centering adjustments to compensate for slight decentrations of the entering laser beam.

• 放大率

  20x

• 波长范围

  632.8 nm (480-1100 nm with reduced transmission)

• 入口孔径

  1.5 mm  

• 出口孔径

  25.0 mm  

• 聚焦范围

  4 m to ∞

• 安装螺纹

  1.0 in. x 32 TPI

• 输入光束直径

  1.0 mm  

• 透射

  T > 95% at 632.8 nm

• 波前畸变

  < λ/4 on axis at 632.8 nm

• 
  

T81-20X激光束扩展器提供了一种低成本的聚焦和成形激光束的方法，具有很高的精确度。这个Galilean 20X光束扩展器结合了备受推崇的Tropel光学设计与改进的适应性和安装。对于必须在离激光器一定距离处形成一个小点的应用，或者为了照明或为了远处物体的对齐，必须扩展准直范围的应用，它们是理想的。波前畸变小于λ/ 4保证最低甚至聚焦光斑大小范围。在镜片上涂上一层氟化镁，经过优化，达到632.8 nm，透光率超过95%。T81-20X具有20x的扩展比和持续的焦点改变的方法。随着功率的增加，光束发散度按比例减小，提供了更大的准直范围。这些光束扩展器可以方便地连接到大多数HeNe激光器的1-32附属线程，并配备精密的光束中心调整，以补偿进入的激光束的轻微分散。