Fixed beam expanders
The variable beam expanders 1x-4x for wavelengths of 355 nm, 532 nm and 1030–1080 nm offer high image quality along with their very compact length. All versions can be adjusted continuously between 1 and 4 times the expansion factor. The larger the expanded beam, the smaller the structures the F-Theta lens can generate.
A focusing ring enables targeted adjustment of the laser beam divergence and therefore compensation of the focal length tolerances in the overall system. It is also possible to change the position of the image plane according to the scanning system.
With their optimized construction design, the beam expanders are extremely robust and compact so the lenses do not rotate during a set-up change. That improves beam stability. The beam expanders have a diffusion-limited design and are tempered for the respective application wavelengths of 355 nm, 532 nm or 1030–1080 nm. The settings can be adjusted using the zoom and focus scales engraved directly onto the beam expander.