Imaging

Finding the Right Lens: The Factors to Focus On

A sharp image requires more than just a good camera; it also takes the right lens. Several aspects must be considered to make sure that the camera and lens work perfectly together and fit a specific application.

Posted in: Articles, Imaging

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From 2D to 3D: MARVEL Tool Offers Immersive View Inside the Brain

Thanks to a partnership between a surgeon and NASA’s Jet Propulsion Laboratory (JPL), a new camera system could improve minimally invasive surgeries and provide 3D endoscopic images of the brain.

Posted in: Application Briefs, Articles, Imaging

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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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