July 22, 2016

Optical Surfaces Ltd. (OSL) announces new specialist Reflective Beam Expanders for high power lasers applications that can achieve higher power density through operating in a vacuum.

Supplied optimised to individual customer specifications, all OSL vacuum compatible beam expanders incorporate smooth running mechanics that do not require lubrication, optical designs that avoid use of glues and cements that might outgas and sandblast finished metalwork that eliminates stray light without the need for anodising.  On completion and performance testing - the beam condensers undergo scrupulous cleaning in a cleanroom environment where they are made ready for dispatch in specially developed packaging.

OSL vacuum compatible reflective beam expanders are aspheric mirror-based devices offering either beam expansion or reduction capabilities. Incorporating high precision off-axis mirrors, they provide an unobstructed output and highly efficient transmission. Reflective beam expanders use mirrors which have constant focal lengths, regardless of the light being focused. Thus, they can be used with collimated polychromatic light without the need of any fine focus adjustment. Available in a wide range of fixed or variable magnification configurations – the beam expanders are designed to be easy to use and to provide accurate, unobstructed expansion/contraction of any collimated input light source. They are also portable and can be used without the need for internal re-alignment.

Each beam expander is supplied housed in aluminium with provision for fixing to an optical table. Alignment aids are provided to ensure correct beam pointing. Manufactured to better than lambda/5 surface accuracy, the off-axis design produces no central obscuration and efficient transmission is obtained, unspoilt by spider diffraction patterns. An interferogram and OPD map is supplied with every product.

For further information please visit www.optisurf.com/index.php/products/laser-beam-expanders/

Optical Surfaces Ltd (www.optisurf.com) has been producing optical components and systems for more than 50 years and is now accepted as one of the world's leading manufacturers of beam expanders and collimators for a wide range of applications. The company's ISO 9001-2008 approved manufacturing workshops and test facilities are deep underground in a series of tunnels excavated in solid chalk where temperature remains constant and vibration is practically non-existent. With such stable conditions testing, particularly with long path lengths, becomes quantifiable and reliable. Working with these natural advantages is a highly skilled team of craftsmen with a commitment to excellence in both product quality and customer service.