Description

Expansion of a laser beam reduces the divergence in the same ratio, and so is desirable for use over long distances. These expanders have a focusing movement of 16mm on the output lens and so can be used to produce a converging beam.

Our Standard range have very high transmittance and aberration correction within the diffraction limit. For the smaller apertures we use high-index singlet lenses (see High-index planoconcave laser lenses and High-index planoconvex laser lenses) allowing these expanders to handle high laser powers. To maintain correction for larger output apertures we use cemented-doublet output lenses.