Beam Expanders are optical devices that increase the diameter of the input beam to produce a larger output. Used with collimated positive focal lengths. Refers to lenses that converge light rays to a focal point. In beam expanders, lenses with positive focal lengths are used to manipulate the beam path effectively, either in Keplerian or Galilean telescope configurations. They have important applications in remote sensing, interferometry, and laser scanning.Our pre-engineered lenses give our customers the option to choose from a variety of preliminary designs based on what suits their application best. But you aren’t limited to in-stock options. Just tell us your application requirements (dimensions, wavelength range, field of view, etc.) and our team of expert engineers will optimize our preliminary designs to meet your exact needs. This will save you the hassle of fully designing a product from scratch and help reduce or eliminate design fees!