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    • Volume 50, Issue 07

    More content from Volume 50, Issue 07

    Courtesy of Synopsys
    FIGURE 1. A cell-phone lens was optimized in CODE V without any control of tolerance sensitivity (a); a similar cell-phone lens was globally optimized in CODE V including the tolerance-sensitivity error function, resulting in a 24% improvement in RMS wavefront error (b). The cumulative probability charts show the probability of achieving the indicated RMS wavefront error performance for systems built within a set of specified tolerances using designated compensators. As the curves move farther to the left, better as-built performance is achieved.
    Optical-design programs encompass lens and illuminator design, analysis, and tolerancing, as well as photometrically tailored design and the interface with external computer-aided...
    July 8, 2014
    (Courtesy: Boeing)
    FIGURE 1. The U.S. Army's high-energy-laser mobile demonstrator (HEL-MD) shot down targets with a 10 kW fiber laser in tests at White Sands and Eglin AFB in Florida. Boeing supplied the acquisition, tracking, and beam-delivery optics that fire a beam through the portal on top of the Army's heavy expanded mobility tactical truck (HEMTT). Boeing will install a 60 kW laser for further tests.
    Solid-state lasers have reached the 100 kW class, and demonstrated that they can shoot down militarily important targets. The next challenge is to harden laser systems enough ...
    July 8, 2014
    FIGURE 1. A conceptual image shows the laser-inscription process; nonlinear absorption occurs at the laser focus, resulting in white-light emission and highly localized energy deposition. A laser can effectively draw a waveguide in a bulk-glass material.
    Integrated photonics can be written in glass via nonlinear absorption by focusing a short-pulse-duration laser into the glass; quantum-integrated-photonics (QIP) devices are being...
    July 8, 2014
    Conard Holton2
    In a recent blog posted on www.laserfocusworld.com, Strategies Unlimited analyst Allen Nogee noted that 2014 total laser sales are looking up, and some of the laggard areas are...
    July 8, 2014
    A VECSEL chip and its V-shaped cavity sit inside a sturdy plastic box; a beamsplitter and wavelength measurement instrumentation are placed outside the box. A birefringent filter (BRF) in the cavity produces single-frequency laser output. The high-reflection (HR) cavity mirror has a 600 mm radius of curvature (Rc).
    Researchers in Germany have developed a single-frequency, single-transverse-mode VECSEL that has a continuous-wave (CW) output of 23.6 W at 1013 nm.
    July 8, 2014
    A schematic comparison describes an OLED a) without any ILE scheme showing TIR and Fresnel reflection and b) with ILE using nanocrystalline scatterers and a high-index smoothing layer that scatters indiscriminately at all incident angles. The blue rays represent the light that travels within the escape cone, with the thin blue rays representing light reflected due to Fresnel reflection and the red rays representing the light that travels outside the device.
    Recognizing the opportunity for significant improvements in OLED output, Pixelligent has developed PixClear, a nanocrystalline synthesis and surface-modification technology that...
    July 8, 2014
    (Credit: Optics Letters)
    A Fresnel lens, 1 mm thick and with a diameter of a little less than 4 mm, is shown next to a Euro cent for comparison (inset); the lens allows images such as this one to be taken at IR wavelengths normally inaccessible to Si lenses.
    A group of French researchers has designed and fabricated a type of small, thin silicon (Si) Fresnel lens that can simplify compact thermal infrared (IR) cameras and make them...
    July 7, 2014
    Courtesy of Sigma Space Corporation
    A de-noised 3D point cloud data off of Point Lobo near Monterey, CA, obtained by HRQLS (top) is shown from an altitude of 2.3 km at a velocity of 200 knots. A 2D profile (bottom) of a 30 m strip from the top figure spans the ground from a local monastery (right) into the Pacific Ocean (left), demonstrating the ability of HRQLS to obtain coastal-bottom returns to depths of 13.5 m.
    The primary technical goal of Sigma’s recently introduced, self-funded, moderate-altitude high-resolution quantum lidar system (HRQLS; pronounced Hercules) is to allow large areas...
    July 7, 2014
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf3web
    Physicists from the Eberhard Karls Universität Tübingen in Germany have fabricated subwavelength gold nanocones that serve as nonlinear optical devices.
    July 7, 2014
    Researchers at the Beijing University of Technology are optimizing three-layer broadband optical antireflection (AR) coatings for silicon using what is called an ant colony algorithm...
    July 3, 2014
    Content Dam Lfw Print Articles 2014 07 Nb Osram Multilaser Web
    In the interests of boosting the power of blue-emitting laser sources for projection while at the same time reducing their complexity, Osram Opto Semiconductors has unveiled a...
    July 3, 2014
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf1web
    Rather than trying to create a grating coupler based on a certain principle, researchers at Technische Universität Berlin and IHP GmbH are using two “metaheuristic” search methods...
    July 2, 2014
    Content Dam Lfw Print Articles 2014 07 1407lfwnbf2web
    A new tunable design from the Wireless Optoelectronic Research & Innovation Centre (WORIC) at the University of South Wales uses an etalon-based design that enables the tuning...
    July 2, 2014
    Content Dam Lfw Print Articles 2014 07 Nb Fibrance
    Fibrance is the term coined by Corning Incorporated for its new optical fibers that distribute a variety of wavelengths of light evenly along their length, much like very tiny...
    July 2, 2014