Beam Expander

Optosigma Beam Expanders are precision optical systems used to expand or reduce the diameter of a collimated laser beam without introducing divergence. They are available in refractive (lens-based) and reflective (mirror-based) designs, each suited to different wavelength ranges and power levels.

Refractive beam expanders:
– Galilean design (no internal focus): compact, suitable for CW and low-energy pulsed lasers; avoids air breakdown at focus
– Keplerian design (with internal focus): longer but allows spatial filtering at internal focus; used in high-quality beam cleanup
– Available for UV (193 nm), visible (355, 532, 633 nm), NIR (1064 nm), and IR (CO2, 10600 nm) wavelengths
– AR-coated elements for minimal reflection losses

Reflective beam expanders:
– All-mirror design: no chromatic aberration; suitable for ultra-broadband or ultrashort pulse applications
– Used when refractive optics introduce unwanted dispersion (femtosecond lasers)

Fixed magnifications available: 2x, 3x, 5x, 8x, 10x, 20x; some models offer adjustable (zoom) expansion for flexibility. Output beam quality (M2) is preserved when input is a good Gaussian beam.

NewRoad provides Optosigma beam expanders in Israel for laser marking, LIDAR, laser microfabrication, and research laser setups.