Optical Surfaces supplies variable focus motorized beam expanders for LIDAR systems used in meteorological applications.
An off-axis reflective beam expander reduces the blind zone of LIDAR systems and therefore often offers the best solution to this problem. In LIDAR systems, such as Doppler Wind LIDAR, the wavefront performance of the beam expander is very important for the LIDAR efficiency.
Variable focus motorized beam expanders from Optical Surfaces incorporate off-axis mirrors, which provide an unobstructed output and highly efficient transmission. The reflective design of these beam expanders is achromatic, and with aluminium coatings they can operate from UV to far IR without adjustment. Optical Surfaces beam expanders are portable and can be used without the need for internal re-alignment — an important consideration in a LIDAR system.

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