BXZ-355-1-4X is a high-precision 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 1× to 4×, allowing flexible adjustment of laser beam diameter without the need for lens changes to suit various processing requirements. The beam expander is optimized for the diffraction limit, maintaining excellent beam quality throughout the entire 1× to 4× magnification range. It 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.This beam expander consists of three groups of UV fused silica lenses, with magnification position markings engraved on the entrance end—rotating to the corresponding mark achieves collimated expanded beam output at the desired magnification. Adjustable divergence allows optimal matching with different laser systems. A locking mechanism is incorporated to maintain stable magnification after focusing adjustment. The entrance clear aperture is 6mm and the exit clear aperture is 24mm. Optical elements feature double-sided V-coating with transmittance exceeding 97% and damage threshold >5 J/cm² @355nm.

The BXZ-355-1-4X 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.