Imaging

Stereoscopic Planar Laser-Induced Fluorescence Imaging for Time-Resolved 3D Movies in Hypersonic Flow

This technique may be useful in applications where time-resolved visualization of unsteady, high-speed flows is needed, such as detonations, supersonic combustion systems, and explosions. Langley Research Center, Hampton, Virginia Understanding and predicting transition from laminar to turbulent flow in hypersonic boundary layers is an active and important field of research because transitional and turbulent heating can be four or more times higher than laminar heating on hypersonic vehicles, including the Orion Crew Exploration Vehicle (CEV).

Posted in: Briefs, Imaging

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Modified-Wolter-Schwarzschild X-ray Telescope

Goddard Space Flight Center, Greenbelt, Maryland X-ray survey missions require nested grazing incidence telescopes with a large field of view (1° or larger) and moderately high resolution across the field of view. This cannot be accomplished using flat focal plane detectors. The telescopes have excellent on-axis resolution, but unacceptable resolution at the edge of the field of view. The aberrations need to be optimized and correctly balanced to improve the telescope optical performance across the field of view.

Posted in: Briefs, TSP, Imaging

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Machine Vision-Based Pose Estimation System

This system uses ellipse detection for spacecraft autonomous rendezvous and docking (AR&D). Goddard Space Flight Center, Greenbelt, Maryland During on-orbit servicing of non-cooperative satellites, the relative position of the satellite with respect to the servicing vehicle is needed. Non-cooperative satellites do not have devices to assist the pose estimation (such as markers or reflector), so a system that uses the natural features of the satellite to determine its pose needs to be developed.

Posted in: Briefs, TSP, Imaging

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Solar Doppler Shift-Based Solar Tracker

Potential applications may be in terrestrial solar thermal collectors. NASA’s Jet Propulsion Laboratory, Pasadena, California This solar tracker integrates a camera with a field of view (FOV) large enough to easily image the entire solar disc — co-boresited with a narrow-band spectrometer that measures the frequency of a Doppler shifted line — with an algorithm designed to drive zero Doppler shift rotation axis of the Sun.

Posted in: Briefs, Imaging

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Beam Shaping for CARS Measurements in Turbulent Environments

This approach obtains more reliable quantitative measurements in a scramjet engine. Langley Research Center, Hampton, Virginia Taking measurements in a scramjet engine is particularly challenging because of the harsh testing environment. Any probe inserted in the flow would generate shock waves, strongly perturbing the flow. Coherent Anti-Stokes Raman spectroscopy (CARS) is a non-intrusive laser-based measurement technique that has been implemented successfully to measure temperature and species concentrations in ducted scramjet engines.

Posted in: Briefs, Imaging

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Electronic Component Testing: A Non-contact Sport

As electronic circuit boards and components get smaller and more powerful, inherent heat can cause significant damage. Infrared thermography can identify hot spots, allowing for improved thermal management and greater advances in circuit board design.

Posted in: White Papers, Electronics, Electronics & Computers, Cameras, Imaging

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High Speed Thermal Cameras -- The Need for Speed

With today’s engineering challenges, the need for non-contact, high speed thermal measurement has never been greater. Traditional forms of temperature measurement such as thermocouples and spot pyrometers do not offer the resolution or speed required to fully characterize high speed thermal devices and provide adequate temperature measurement. Infrared cameras offer thousands, even millions, of points of non-contact high speed thermal measurement. However, not all infrared detectors are created equal. Here we’ll discuss the most common types of thermal infrared detectors and the capabilities as well as limitations of each. You’ll find this discussion helpful for solving applications involving fast moving targets or targets with fast thermal slew rates and the following information will provide the knowledge base to ensure measurements are reliable, avoiding a “garbage in, garbage out” situation.

Posted in: White Papers, Defense, Cameras, Imaging, Data Acquisition, Detectors

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The Advantages of Cooled IR Cameras

For many years, thermal imaging cameras have been used by scientists, researchers and R&D specialists for a wide range of applications, including industrial R&D, academics & research, non-destructive testing (NDT) & materials testing, and defense and aerospace. However, not all thermal cameras are created equal and for some applications dedicated, advanced thermal cameras with high speed stop motion capability are required in order to get accurate measurements.

Posted in: White Papers, Automotive, Cameras, Imaging

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Area-Scan Camera

The Basler beat area-scan camera from Basler (Ahrensburg, Germany/ Exton, PA) features 12 MP of resolution, progressive scan, and global shutter technology. Using the Camera Link interface, the cameras process 62 frames per second. Possible applications include measurement and identification; semiconductor and electronics manufacturing; license plate identification; and fluorescence microscopy. Basler’s free pylon Camera Software Suite, based on the GenICam standard, works with the Basler beat series. The software suite provides access to all functions and optimal operation of the camera.

Posted in: Products, Imaging, Manufacturing & Prototyping

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Area-Scan Camera

The SAPPHIRE S-25A70/CXP area-scan camera from Adimec (Eindhoven, the Netherlands/Stoneham, MA) is equipped with the CoaXPress V1.1 Quad interface (4 x CXP-6). CoaXPress CXP-6 Quad offers a peak transfer rate of 2 Gigapixels/s. Data transmission between the camera and frame grabber occurs at up to 25 Gbits/s (4 x 6.25 Gbits/s). The S-25A70/CXP camera utilizes the ON Semiconductor Vita25k global shutter image sensor. Additionally, the 25-Megapixel CMOS global shutter device delivers images of 5120 x 5120 pixels at a maximum of 73 full frames per second (fps). A defect pixel correction algorithm maintains image uniformity. At maximum speed, cable lengths over 30 meters are supported without the need for signal repeaters.

Posted in: Products, Imaging, Manufacturing & Prototyping

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