Overview:

Laser Beam Expander is used to compress the divergence angle of the beam by expanding the diameter of the laser beam, so it is widely used in laser ranging system or laser focus system. The beam through a laser beam expander features a smaller divergence angle, which can achieve the ideal effect in long distance measurement, and also can get smaller and higher energy beam spot in the laser processing applications.

Star Optic offers Beam Expanders can expand or reduce the diameter of a collimated beam by a factor of 2, 3, 5, 10, or 20. These Galilean beam expanders use a low-aberration, air-spaced design optimized to provide a wavefront error of less than λ/4 (i.e., diffraction-limited performance) and minimize the impact on the M2 value of the expanded beam. An expanded beam can be focused to a narrow diffraction-limited waist, which can be necessary for use with optics or instruments that have narrow input apertures

These fixed-magnification laser beam expanders are offered with optics that have either narrowband or wideband AR coatings.