Request InfoOptical Surfaces Ltd.Hyperbolic mirrors from Optical Surfaces Ltd. are designed for deep space observation telescopes and earth observation satellites. Hyperbolic mirrors are used in a telescope design to correct certain distortions caused by an extremely fast f-ratio design. A hyperbolic secondary mirror is used in Cassegrain telescopes to correct the spherical aberration caused by shorter focal length of the parabolic primary. The mirrors can be produced at up to 500 mm in diameter with typical wave front error of λ/20 PV, surface finish of 10/5, and microroughness of <1.2 nm RMS. The...See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra July 2023 IssueMirror MountsWedged back paraboloid mounts from Optical Surfaces Ltd. provide a secure and stable platform for mirror diameters from 50 to 200 mm. Constructed in black anodized aluminum, the device’s...Photonics 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. Delivering artifact-free high magnification,...Photonics Spectra September 2023 IssueModular Beam ExpanderOptical Surfaces’ pre-aligned large diameter beam expander modules enable complex 5-degrees of freedom set-up in a matter of minutes. The modular beam expander assembly components include...Photonics Spectra January 2024 IssueMirror MountsThe OS series of large-diameter mirror mounts from Optical Surfaces Ltd. provides a secure platform for larger, high-precision flat, off-axis, and spherical mirrors. 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