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Active Aircraft Pylon Noise Control System
Unmanned Aerial Systems Traffic Management
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
Self-Healing Wire Insulation
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Design, Fabrication, and Test of WFIRST/AFTA GRISM Assembly

Goddard Space Flight Center, Greenbelt, Maryland This work originated with the Wide Field InfraRed Survey Telescope (WFIRST) slitless spectrometer design (GRISM assembly), which attempted to follow the Hubble Space Telescope (HST) method of employing a singleelement GRISM as a slitless spectroscope. However, WFIRST’s field of view (FOV) is ~100x of HST’s wide field camera, and the spectral resolution is ~5x higher with a relatively faster f/8 system. The design turned out to be extremely difficult using only one diffractive surface. Even with many freeform optical elements, and putting a grating on a toroid surface, the image performance was still not satisfactory.

Posted in: Briefs, TSP, Imaging, Photonics

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Spinal Ultrasound Just-in-Time Training Tool

This software facilitates ultrasound imaging of the cervical and lumbar spine by crewmembers in-flight. Lyndon B. Johnson Space Center, Houston, Texas Back pain and injury are recognized risks that can affect the well-being and performance of crewmembers during missions, as well as their long-term health. Spine elongation is a documented effect of microgravity, back pain is a common occurrence in early flight, and the post-flight incidence of spinal injury is higher than the population average. These observations suggest that spinal unloading results in a transition to a new set point for the spine, and causes discomfort and an increased risk of injury.

Posted in: Briefs, TSP, Imaging, Photonics

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Wide-Spectrum Organic Mass Spectrometer Using Far-Ultraviolet Ionization

Lyndon B. Johnson Space Center, Houston, Texas Two-step laser desorption/photoionization mass spectrometry (L2MS) represents a powerful tool for the organic analysis of astromaterials. The technique has high sensitivity and requires little to no sample preparation.

Posted in: Briefs, TSP, Imaging, Photonics

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Tiny Lenses Capture Very Big View

Engineers from the University of Wisconsin-Madison have created the first- ever flexible, Fresnel zone plate microlenses with a wide field of view — a development that could allow everything from surgical scopes to security cameras to capture a broader perspective. The advance centers on a method for creating tiny lenses, each the size of a grain of salt, embedded within a flexible plastic polymer. This approach allowed the researchers, led by Hongrui Jiang, the Vilas Distinguished Achievement Professor and Lynn H. Matthias Professor in electrical and computer engineering at UW-Madison, to bend an array of multiple lenses into a cylindrical structure. An array of these miniscule lenses, each no larger than a head of a pin, can capture an almost complete panorama, producing images from a 170-degree field of view.

Posted in: Articles, News, Optics, Photonics

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Product of the Month: Multi-Functional Goniometer

Lambda Research Corporation (Littleton, MA), the US distributor of opsira metrology equipment and designer and publisher of illumination and optical design software, has introduced the robogonio from opsira. The robogonio is the first robot-driven, multi-functional goniometer that incorporates six-axis measurement of angular-dependent photometric and radiometric parameters to combine the advantages of different conventional goniometer types into one device.

Posted in: Products, Products, Photonics

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Using Radiation-Hardened Optoelectronic Devices

Optoelectronic components must be protected from the radiation they are exposed to in military, space and nuclear environments to prevent malfunction and damage. Radiation hardening electronics makes them resistant to this damage by letting them retain characteristics, and keeps imaging and electrical performance consistent with pre-radiation values. This is especially critical for components used in applications like a satellite or a nuclear reactor that cannot be accessed and must work properly for many years.

Posted in: Articles, Features, Photonics

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How Quantum Dots and Ultra HD Are Changing the Way TV Displays Are Made

Chances are you’re familiar with HDTV. Most of us have one of these in our living rooms. In fact, according to a recent study, more than 80% of US residents probably have at least one HDTV in their homes. And there’s a good possibility these sets are LCDs. They may be a few years old but they’re thin, look great hanging on the wall and basically do their job well. Some of these HDTVs also have 3D capabilities but the required glasses have long been lost to the couch cushions or the dog ate them or they just never made it out of the packaging due to lack of content support by broadcasters.

Posted in: Articles, Features, Photonics

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