Beam expander

Beam Expander

A beam expander is any optical system designed to increase the diameter of a laser beam. In most cases, the term is taken to mean a telescope designed to take a small-diameter collimated beam input beam and produce a larger diameter collimated output beam, thus reducing the divergence of the beam. The beam expander consists of a negative input lens and a positive objective. The expansion factor is the ratio of the focal length of the two lenses.

Features

Applications

Low power loss

Precision laser machining: capable to provide a high power density focal spot.

Good output collimation

Able to withstand laser power of more than 1000 W

Laser range finder: capable to provide a highly collimated beam.

Adjustable divergence angle of 18 to 32 mrad with the variable beam expanders

Combining with a spatial filter, able to modify laser power distribution.

Specifications