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Athermalized Beam Expanders

Photonics.com
Aug 2018
Optical Surfaces Ltd.Request Info
 
KENLEY, England, Aug. 16, 2018 — Athermalized Beam ExpandersAthermalized beam expanders from Optical Surfaces Ltd. are based upon a Dall-Kirkham off-axis mirror design that incorporates invar elements to provide thermal stabilization.

In addition, to better control thermal behavior, the off-axis mirrors in the athermalized beam expanders have a short focal length, resulting in a very robust assembly, which is less sensitive to temperature changes. As a result, high optical performance is maintained over a wide range of temperatures. Benefiting from an off-axis design, the expanders provide an unobstructed output and highly efficient transmission.

The reflective design of the beam expanders is achromatic and with aluminium coatings can operate from UV to FIR without adjustment or internal realignment. Each athermalized beam expander is housed in an aluminium housing with provision for fixing to an optical table. Alignment aids are provided to ensure correct beam pointing.


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