355nm laser beam expander is a high-precision beam shaping optical component specifically designed for ultraviolet laser systems, widely used in precision laser processing and scientific research applications. Featuring a Galilean lens configuration with precise combination of concave and convex lenses, it effectively expands the incident beam diameter while significantly reducing beam divergence and improving far-field spot quality.

Key Advantages

This beam expander series is optimized for the 355nm UV wavelength, utilizing UV-grade fused silica (UVFS) optical materials combined with high-performance anti-reflection coatings to achieve ≥98.5% transmission and excellent beam quality. The optical system employs an air-spaced lens construction without cemented elements, eliminating internal focal points and providing an extremely high laser damage threshold (up to 10 J/cm²) for stable operation in high-power UV laser systems. The entire optical system is optimized for diffraction-limited performance with wavefront error controlled to ≤λ/10, ensuring high-precision transmission of UV laser beams.

Product Variants

Both fixed magnification and continuously adjustable zoom beam expanders are available. Fixed magnification models offer standard ratios including 1.5X, 2X, 4X, 8X, and 10X, featuring compact construction and high stability. Zoom beam expanders provide continuous adjustment ranges of 1-4X and 2-10X, offering flexibility for diverse processing requirements. Standard mounting interfaces include M30×1 or M34 threads, compatible with mainstream UV laser processing systems.

Typical Applications

The 355nm UV laser beam expander is widely used in demanding applications including semiconductor wafer dicing, flexible PCB drilling, precision micromachining, laser medical equipment, scientific research optics, and high-precision 3D additive manufacturing where processing accuracy and beam quality are critical requirements.