We have subdivided our Laser Beam
Expanders into three basic wavelength ranges: UV LASERS, VIS-NIR
LASERS, and HIGH-POWER LASERS (primarily Nd:YAG).
OFR manufactures Laser Beam Expanders which are basically
custom-assembled according to specific requirements of the
application. The telescope body consists of two black anodized,
close-fitting tubes which rotate in or out of each other,
locking screws, and a matched pair of Lenses: the Input Expander
and the Output Collimator. Actually, these Lenses are based
on our minimum aberration BestForm Laser Lenses which are matched so as to produce a collimated beam
whose wavefront distortion is consistent with diffraction
theory, namely 1/4-wave or better.
The simple telescope body enables adjustment of the spacing
between the lenses for focusing, collimating or diverging.
In general, we can match any combination of our BestForm Lenses
to meet a very wide variety of conditions and expansion ratios
from 2.5X to 50X. The Lenses are multilayer antireflection
coated for peak transmittance of > 96% through the pair.
We will specifically
fabricate custom brackets or adapters to fit the telescope
to existing apparatus as required. The EL-25-series and ELQ-25-series
Telescopes are 1.5" diameter x 4" long expanding
to 7" long depending upon lens combinations required.
Likewise, the EL-51-series and the ELQ -51-series are 2.5"
diameter x 8" long expanding to 12" long.