Beam Expanders for Laser Tools
Beam Expander, actually a Zoom Telescope
The primary advantage of a beam expanding laser telescope in an industrial laser tool is shrinking the focused spot which then greatly increases focused power density. For example a 3.3X beam expansion shrinks the spot by 1/3 thus providing an order of magnitude (10X) increase in power density. Since it is power density that your part “feels”, this is significant. Getting the equivalent by raising your maxed out laser power by 10X is generally either impossible or very expensive. A telescope is a useful method for improving laser processing.