Address: 4, Jiang Wang Miao Street Nanjing,Jiangsu 210042, China
Phone: +86-25-85282507
Hyperbolic Mirror
Hyperbolic mirrors are intended to form the image of object in focal plane, and normallyare used in astronomy telescopes, as well as other optical systems demandingbroadband reflection and excellent photographic effect. For example, R-C telescopesutilize two hyperbolic mirrors as the primary and secondary mirror, which also results in a smaller spot size on and off axis. Cassegrain telescopes have primary parabolic mirrors focusing their rays onto a convex hyperbolic secondary mirror, which yields excellent correction over moderatefields both for visual and photographic astronomy.Like ellipsoidal mirrors and parabolic mirror, hyperbolic mirror can be on-axisor off-axis. They can be made of a variety of materials, including BK7 glass,copper, fused silica, UV grade fused silica, nickel, and other optical glasses.Common coatings include none (uncoated), enhanced aluminum, protected aluminum,dielectric, protected gold and silver.We can provide both on-axis and off-axis hyperbolic mirrors with the shape of eitherconvex or concave. Our company specializes in the production of medium to large-sizecustom hyperboloid with exacting tolerances, high grade surface finish anddifficult coatings. Surface accuracy can be verified by the Foucault test or onthe Zygo interferometer.Specifications:1) Material: BK7 (K9)2) Diameters: Φ25.4 - 460mm3) Types: on-axis, off-axis4) Surface quality: up to 10 - 5 S&D5) Surface accuracy: up to λ/206) Clear aperture: ≥90%7) Diameter tolerance: +(0.1 - 1) / -0.0mm (depends on dimension)8) Focal length tolerance: ±(1% - 1.5%) (depends on dimension)9) Bevel: (0.1 - 2mm) x 45° (depends on dimension)10) With coating
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Ellipsoidal mirrors have two conjugate foci. Light from one focus passes throughthe other after reflection. Ellipsoids collect a much higher fraction of total emittedlight than a spherical mirror or c
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