BXZ-355-2-8X-B is a high-performance continuous zoom beam expander specifically designed for 355nm ultraviolet lasers. Manufactured with high-quality UV fused silica (UVFS) optical material and precision coating technology, it delivers excellent transmittance and a high damage threshold in the ultraviolet band, capable of withstanding long-term stable operation in high-power UV laser systems.

The key advantage of this product is its continuous zoom function, offering an adjustable magnification range from 2× to 8×, allowing flexible adjustment of laser beam diameter without the need for lens changes to suit various processing requirements. According to LENSTEK's official specifications, this model features an 11mm entrance clear aperture and a large 60mm exit clear aperture, with a compact housing length of 185-194mm. The "-B" suffix indicates a large output aperture design (Big output diameter), providing larger clear aperture compared to the standard version to meet applications requiring larger beam diameters.This beam expander adopts a Galilean optical design with no internal focal point, effectively avoiding air ionization risks in high-power UV laser applications, making it particularly suitable for high-power UV laser systems. UV fused silica material offers extremely high transmittance at the 355nm wavelength, and combined with high-damage-threshold anti-reflective coating (Ravg<0.25%), the total transmittance exceeds 97%. Adjustable divergence enables optimal matching with different laser systems, and a locking mechanism is incorporated to maintain stable magnification after focusing adjustment.

The BXZ-355-2-8X-B is widely used in UV laser marking, flexible PCB cutting, ceramic drilling, semiconductor wafer dicing, scientific research, and laser measurement applications requiring high flexibility, making it an ideal optical solution for dynamic beam size adjustment in 355nm UV laser systems.