Optical Surfaces Ltd (OSL) has introduced its range of laser beam expanders, providing a proven means of focusing and shaping laser beams with a high degree of accuracy. Four standard beam expanders are available offering x5, x10, x15 and x20 magnification. The expanders are designed to be easy to use and to provide accurate, unobstructed and achromatic expansion of any collimated input source. OSL beam expanders are suitable for 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 lambda/10 surface accuracy, the off-axis design of OSL's laser beam expanders produces no central obscuration and highly efficient transmission is obtained, unspoilt by spider diffraction patterns. Alignment aids are supplied with each beam expander to ensure correct beam pointing. The all-reflecting design of OSL laser beam expanders is achromatic and with aluminium coatings can operate from the UV to far IR without adjustment. By incorporating zero expansion glass mirror substrates, the beam expanders provide high operational stability.
In addition to the standard products, OSL also provides custom beam expanders tailored to suit the needs of individual customers.