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  • Hermetic Sealing of Sapphire Windows
    The use of sapphire material for optical sensing, emitting or detecting has been increasing considerably in the last 20 years, hence the term "window". Sapphire offers a high-quality optical surface finish, the hardness to prevent scratches, and high temperature processing capabilities. Although
  • Sapphire Viewport Transmission Curve
    Sapphire is a synthetic, hexagonal single crystal anisotropic material which displays substantially different physical, thermal, dielectric and optical characteristics when measured along different axes. MDC sapphire viewports are constructed using 90° crystal orientation, where the crystal
  • Science Update
    with a sensor that uses near-infrared-reflectance spectroscopy to take readings through a sapphire "window " on its bottom. Initial field trials have demonstrated an ability to measure moisture, organic carbon, and total nitrogen in soils. Data from on-the-go soil analyses particularly
  • Optical Ceramics and Semiconductor Ceramics
    Optical ceramics and semiconductor ceramics are specialized ceramic materials. Ceramic materials are used in fabricating and processing optical components such as lenses, windows, prisms, optical fiber and lasing materials. Single-crystal ceramics, transparent ceramics, sapphire and quartz
  • MICRO:New Technologies-Analysis & Metrology, by Patrick J. McCann, p.93 (July '99)
    of such materials as sapphire, calcium fluoride, or zinc selenide. The signal from a detector facing the laser provides information on the identity and concentration of the molecules present as the laser is tuned across the relevant absorption bands. Semiconductor lasers fabricated using epitaxially

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