As the name suggests a beam expander is an optical system used to increase the diameter of a laser beam. The most common reason for using a beam expander is to increase the beam diameter to a size which allows the smallest possible focussed spot to be obtained.


Standard beam expanders for CO2 (10.6µm) laser systems:
Input beam diameter Expansion ratio Lens material Part number
<6mm X1.5 ZnSe 1006-100
<6mm X2 ZnSe D1383-01
<6mm X2.5 ZnSe 1205-100
<6mm X3 ZnSe 858-100
<6mm X3.75 ZnSe 575-100
<6mm X4 ZnSe 1147-100
<6mm X5 ZnSe 1149-100
      Custom designs available upon request.