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.