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Photonics.com Optics & Optical Coatings Technology Newsletter (9/10/2013)

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Photonics.com Optics & Optical Coatings Technology Newsletter
Transparent Ceramics Find Wide Use in Optics
Polycrystalline ceramics with the cubic spinel structure enable multiple defense applications, including night-vision goggles and IR optics for military systems such as domes, lenses, reconnaissance and sensor windows – they also have applications in nonmilitary arenas such as semiconductor processing, oil and gas drilling, medical optics and lasers.
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Faster Mold Coating Tests Make Glass Processing More Efficient
Bypassing the time-consuming wear stages of heating and cooling allows quick testing of mold coating lifetimes while increasing efficiency for precision glass molding.
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The Complexities of High-Power Optical Coatings Understanding the Complexities of High-Power Optical Coatings
In today's optics industry, many optical systems have come to rely on high-power laser sources, built with precision optical elements. Many of these elements require coatings to improve transmission or reflection for certain wavelengths or polarization states. Coating failure can substantially impede the performance ability of these high-power laser systems. While standard coating technology can provide cost-efficient, easily reproducible precision results, there are limitations to the durability of standard coatings, particularly when subjected to high intensity irradiation. As a result, specialized high-power optical coatings are often required. High-power optical coatings can be applied to a range of optical elements, such as optical lenses, mirrors, windows, optical diffusers, optical filters, polarizers, beamsplitters, and diffraction gratings.
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Optical Coatings Take a Leap Forward
A University of Vienna and JILA collaboration builds on advancements in semiconductor lasers, quantum optomechanics and microfabrication to demonstrate low-loss mirrors based on substrate-transferred epitaxial multilayers that exhibit both unprecedentedly low mechanical loss and high optical quality.
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OCT improves S-GRIN lens manufacturing process
Spherical gradient in refractive index (S-GRIN) lenses are lightweight and easily deformable, but manufacturing them with high quality and consistency is challenging. Now, researchers at the University of Rochester are embedding OCT into the manufacturing process to get a better view of the lens’ complete structure.
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Spray-on flat lens works in the UV
A new, easily fabricated metamaterial-based flat lens that bends and focuses UV light could improve photolithography, nanoscale manipulation and manufacturing, and even high-resolution 3-D imaging, say its developers at NIST.
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