Request InfoOptical Surfaces Ltd.KENLEY, England, Aug. 16, 2018 — Athermalized 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...See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra October 2022 IssueCompact Beam ExpandersThe A1 series of compact beam expanders from Optical Surfaces Ltd. delivers ×30 magnification from 2-mm aperture high-power laser beam lines. 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