KENLEY, England, May 26, 2010 — Optical Surfaces Ltd.’s range of laser beam expanders provide a proven means of focusing and shaping laser beams with a high degree of accuracy. Designed to be easy to use and to provide accurate, unobstructed and achromatic expansion of any collimated input source, four standard beam expanders are available offering 5×, 10×, 15× and 20× magnification. They are suitable for use in applications in which a small spot must be formed at some distance from the laser, or where the collimation range must be extended for illumination, or for alignment of distant objects. Manufactured to better than λ/10 surface accuracy, their off-axis design produces no central obscuration and delivers highly efficient transmission, unspoiled by spider diffraction patterns. Alignment aids are supplied with each beam expander to ensure correct beam pointing. The all-reflecting design is achromatic and, with aluminum coatings, the devices can operate from the UV to the far-IR without adjustment. Using zero expansion glass mirror substrates, they provide high operational stability. In addition to the standard products, the company also provides custom models optimally tailored to suit customer needs. Customized versions can be produced to provide lower wavefront distortions, different expansion ratios, higher transmissions and damage thresholds, and larger output beam diameters. The devices are housed in a robust box assembly that can be fixed to an optical table and that enables transportation to different sites without the need for internal realignment. Test interferograms and an optical path difference map are supplied with every beam expander.