A beam expander can enlarge an input beam by the factor M, but it can also reduce it by the factor 1/M with a reversed optical beam path. Beam expanders are optical systems for increasing or decreasing the diameter of a laser beam. larger collimated output beam. In such systems, the object rays. 📦 For purchasing, use the RP Photonics Buyer's Guide for beam expanders. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions. In other words, it stretches the beam out while keeping its direction and properties intact.
