An optical system designed to increase the diameter of a laser beam.
In most cases, the term "expander" is taken to mean a telescopic 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.
LaserArx is able to provide beam expanders for our laser modules, and they can be specifically aligned and calibrated for your purchase. If you require further assistance, please do not hesitate to email us at firstname.lastname@example.org.