Sill Optics Variable Beam Expander

Sill Optics Variable Beam Expanders are designed to optimize focus diameter, focus position and beam propagation within a laser system. All optical elements within these beam expanders are constructed from fused silica substrates featuring a special low-absorption coating to minimize thermal effects.  These beam expanders can withstand the high thermal strain of small beam diameters and provide stable and reliable performance while utilizing high average or high peak power lasers. Sill Optics Variable Beam Expanders are available for use with 355nm, 532nm,and 1064nm design wavelengths and feature high damage thresholds for pulsed lasers up to 0.3 J/cm² (1s, 50Hz). These beam expanders are ideal for ideal for high power laser applications where magnification changes may be required, such as prototyping, solar cell manufacturing, confocal microscopy, or R&D.