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Hot Embossing Rivals Molding

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FREIBURG, Germany, Nov. 9, 2007 -- Hot embossing, a recently optimized technology in which glass is heated to high temperatures and molded on both sides, has been found to be up to 10 times faster and 70 percent cheaper than precision molding, with the lenses produced of comparable quality. A finished glass lens in the pressing mold. (Image: ©Fraunhofer IWM) Precision molding is the current standard for producing aspherical glass lenses, which can be found in cameras, fiber optics, auto headlights, infrared cameras and optical sensors for machine control. It is also used to form the focusing optics for items such as...Read full article

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    Published: November 2007
    Glossary
    glass
    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...
    infrared
    Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but shorter than those of microwaves. The infrared spectrum spans wavelengths roughly between 700 nanometers (nm) and 1 millimeter (mm). It is divided into three main subcategories: Near-infrared (NIR): Wavelengths from approximately 700 nm to 1.4 micrometers (µm). Near-infrared light is often used in telecommunications, as well as in various imaging and sensing...
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    optical
    Pertaining to optics and the phenomena of light.
    photonics
    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...
    asphericalBiophotonicscamerasdiefiber opticsFraunhofer Institute for Mechanics of MaterialsFreiburgglasshot embossingindustrialinfraredIWMlensesmedical instrumentsnanoNews & FeaturesopticalPeter Mannsphotonicsprecision moldingSensors & Detectorstelescopes

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