The divergence of green laser
beam is normally very big. If the working distance of laser is long
you have to decrease the beam divergence. This beam expander series
is specially designed for use with green laser. The different
expansion ratio can provide a small beam diameter at *0m, **0m even
at ***0m. The lens design has considered the correction of
spherical aberration in order to get good beam quality at long
distance.Other expansion ratio is optional based on your
request.
