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  • ASPH Precision-Molded Glass Aspheric Lenses
Mar 2007
CVI Melles GriotRequest Info
ASPH aspheric lenses are diffraction limited, antireflection coated and available with numerical apertures from 0.30 to 0.55. Precision-molded glass aspheric lenses are a practical compromise between a multielement lens and a molded plastic lens. A molded glass aspheric lens has two advantages over a multielement lens. First, the aspheric design reduces spherical aberration and coma in a single element; and second, with fewer optical surfaces required, overall light transmission is higher. In addition, molded glass aspheres operate over a much broader temperature and humidity range than plastic lenses. Molded glass aspheres are often used in applications such as laser diode collimating and focusing, fiber coupling, barcode scanning, LCD and LCOS digital projection, optical data storage, microscopic measurement and distance remote sensing.


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Not spherical; an optical element having one or more surfaces that are not spherical. The spherical surface of a lens may be slightly altered so as to reduce spherical aberration. Aspheric surfaces are frequently, but not necessarily, surfaces of revolution about the lens axis.
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda, lime and sand, melted and cast, rolled or blown to shape. Most glasses are transparent in the visible spectrum and up to about 2.5 µm in the infrared, but some are opaque such as natural obsidian; these are, nevertheless, useful as mirror blanks. Traces of some elements such as cobalt, copper and...
A transparent optical component consisting of one or more pieces of optical glass with surfaces so curved (usually spherical) that they serve to converge or diverge the transmitted rays from an object, thus forming a real or virtual image of that object.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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