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Active Aircraft Pylon Noise Control System
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Method of Bonding Dissimilar Materials
Sonar Inspection Robot System
Applying the Dynamic Inertia Measurement Method to Full-Scale Aerospace Vehicles
Method and Apparatus for Measuring Surface Air Pressure
Fully Premixed, Low-Emission, High-Pressure, Multi-Fuel Burner
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Machine Vision System Measures ‘Drops’ in Citrus Grove Health

A University of Florida Institute of Food and Agricultural Sciences researcher has developed a machine vision system to measure the quantity of a citrus grove’s dropped and decayed oranges. The fallen fruit provides an indication of a so-far incurable disease that has been spreading through Florida’s trees since its first appearance in the state in 2005.

Posted in: Application Briefs, Applications, Imaging, Photonics

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Acrylate-Based Specialty Optical Fiber Coatings for Harsh Environments

Applications of optical fibers at high temperatures and in harsh environments demand coatings sustainable under those conditions. The goal of this work was to evaluate thermal and environmental stability of a series of commercially available and in-house formulated acrylate-based coatings. Dual and single-coat fiber designs were tested. The individual formulations included non-urethane and urethane acrylates, silicone acrylates and an organic-inorganic hybrid acrylate. The “as drawn” fibers were tested for attenuation, mechanical reliability, microbend sensitivity, delamination resistance and coating stripability. Thermogravimetric analysis (TGA) was used for estimating the use temperature of the coatings. In addition, the fibers were exposed to harsh environments, including dry aging in air (150°C) and in nitrogen (250°C), autoclaving, immersion in high pressure/temperature water (up to 200°C and 2000 psi) and immersion in a hot cable gel (160°C). Based on the obtained results, the best formulations were ranked for suitability in different types of fiber application.

Posted in: White Papers, Aeronautics, Defense, Optics, Photonics

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Boosting Machine Vision with Built-in FPGA Image Preprocessing

Since imaging processing tasks can consume major CPU resources in machine vision applications, increasing processing performance within size constraints is, accordingly, a common challenge for solution providers. The following discusses the efficacy of FPGA in addressing such performance shortcomings, presents the image processing tasks most suitable for FPGA, and compares the capabilities of CPU and FPGA in operation. A built -in FPGA image preprocessing solution supporting machine vision app lications is then presented.

Posted in: White Papers, Imaging, Optics, Photonics, Machinery & Automation, Robotics

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How the Laser, Optic, & Photonic Industries Benefit from Electropolishing

Improve precision and cleanliness with an enhanced surface finish. Like other industries that utilize electropolishing to finish metal components, there are many benefits associated with electropolishing metal components used in photonics, optics or laser applications.

Posted in: White Papers, Coatings & Adhesives, Materials, Medical, Optics, Photonics

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NASA’s Infrared Sensor Spots Near-Earth Asteroids

The Near-Earth Object Camera (NEOCam) is part of a proposed NASA mission to find potentially hazardous asteroids. In a Q&A with Photonics & Imaging Technology, NEOCam principal investigator Amy Mainzer ex plains how the NEOCam chip, a stamp-sized mega pixel infrared sensor, detects the faint heat emitted by near-Earth objects circling the Sun.

Posted in: Articles, Features, Imaging, Photonics

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Advanced Digital Microscopes Providing Simple Solutions to Common Microscopy Issues

Thanks to a combination of high-quality optics and advanced digital imaging technology, today’s newest digital microscopes provide efficient solutions to a variety of common microscope challenges faced by users of conventional optical and digital microscopes. The following represent 10 conventional microscope issues and 10 solutions made possible with current digital microscope technology.

Posted in: Articles, Features, Imaging, Photonics

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Characterizing Richness of Previously Unmapped Terrain and Estimating its Impact on Navigation Performance using 3D Range Sensors in Flight

NASA’s Jet Propulsion Laboratory, Pasadena, California Landers to large planetary bodies such as Mars typically use a secondary reconnaissance spacecraft to generate high-fidelity 3D terrain maps that are subsequently used for landing site selection and creating onboard maps for terrain-relative navigation systems. This luxury does not exist with small primitive bodies such as comets and asteroids. For these bodies, the landing spacecraft has to perform the 3D mapping and, with possible help from ground control, choose a feasible landing site. To enable this operation, the spacecraft would need to carry a 3D ranging sensor system such as a LIDAR. With the spacecraft placed in extended mapping orbits, 3D range measurement data is then used to create a shape model of the object. Terrain-based navigation schemes that employ cameras could then be used to image, detect, match, and track features against the map database to provide a 6-degrees-of-freedom (DOF) navigation solution during descent. Camera-based systems, however, are not robust to lighting variations, and do not provide a direct 3D position/range feedback.

Posted in: Briefs, Optics, Photonics

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