continuously variable beam expander is a precision optical device designed for high-power laser systems, enabling stepless adjustment of beam magnification within a specified range. This provides exceptional flexibility and adaptability for laser material processing applications. Magnification ranges typically cover 1-3X, 2-8X, and even 2-12X or 3-15X, with smooth adjustment via manual handwheel or motorized control.

Optical Design

This product series adopts a classic Galilean telescope configuration with no internal focal point, effectively eliminating the risk of optical damage under high power densities. All optical elements are fabricated from fused silica, offering excellent thermal stability and high damage thresholds. Advanced anti-reflection coatings ensure >97% transmission while minimizing ghost reflections. Transmitted wavefront accuracy reaches λ/4 to λ/10, guaranteeing diffraction-limited performance.

Key Advantages

The core advantage lies in its "one-lens-fits-many" capability. Magnification can be continuously adjusted across the full range via a handwheel or motorized control, while divergence can be independently adjusted for optimal beam collimation. Select high-end models feature non-rotating optics, limiting beam pointing wander to within 1 mrad during adjustment. Motorized versions support closed-loop control and encoder feedback, achieving adjustment times as fast as 0.7 seconds.

Typical Applications

This product serves primarily in R&D parameter exploration and multi-scenario adaptation, widely used in: laser marking and cutting system optimization, solar cell scribing, LiDAR systems, confocal microscopy, and research or industrial environments requiring frequent changes in processing scale. Available for mainstream laser wavelengths including 355nm, 532nm, and 1064nm.