355nm F-Theta scan lens is a critical optical component specifically designed for ultraviolet laser processing systems, widely used in laser marking, precision cutting, drilling, and micro-machining applications.

Key Features

This lens series is optimized for the 355nm UV wavelength, utilizing high-quality UV-grade fused silica as the lens substrate material, offering exceptional thermal stability and high laser damage thresholds. The optical system employs an air-spaced lens construction, eliminating internal focal points and enabling operation at laser powers up to 4kW without active cooling.

Optical Performance

The defining characteristic of F-Theta lenses is the linear relationship between spot position and scan angle (h = f × θ), which significantly simplifies scan control system design. Both telecentric and non-telecentric designs are available. Telecentric F-Theta lenses ensure the chief ray of the focused beam remains perpendicular to the focal plane across the entire scan field, delivering excellent spot consistency between center and edges. Scan fields range from 50mm×50mm to 158mm×158mm, with focused spot sizes achieving micron-level precision.

Mechanical Specifications

The standard mounting interface is M85×1 thread, compatible with mainstream galvo scanning systems. Protective windows are available as an option to prevent optical contamination from processing debris.

Typical Applications

355nm F-Theta scan lenses are widely used in high-end manufacturing applications including semiconductor wafer dicing and scribing, flexible PCB drilling, solar cell scribing, fine laser marking, and precision medical device manufacturing. The UV wavelength offers high photon energy with a minimal heat-affected zone, making it particularly suitable for micro-machining applications demanding high precision and tight thermal control.