Special Coverage

Supercomputer Cooling System Uses Refrigerant to Replace Water
Computer Chips Calculate and Store in an Integrated Unit
Electron-to-Photon Communication for Quantum Computing
Mechanoresponsive Healing Polymers
Variable Permeability Magnetometer Systems and Methods for Aerospace Applications
Evaluation Standard for Robotic Research
Small Robot Has Outstanding Vertical Agility
Smart Optical Material Characterization System and Method
Lightweight, Flexible Thermal Protection System for Fire Protection
Nasa Tech Briefs

2.2-Micron, Uncooled, InGaAs Photodiodes and Balanced Photoreceivers up to 25-GHz Bandwidth

These photodiodes have applications in LiDAR sensors, telecommunications links, and pulsed laser systems.Traditional applications for 2-micron photodetectors have been largely dominated by passive remote sensing where detectors having bandwidth of even one megahertz are deemed sufficient. The onus in such applications is to achieve low dark current through active cooling. The advent of high-power, 2-micron-wave-length lasers have made coherent LiDARs viable for active sensing applications. Such a system needs photodetectors that can handle high local oscillator optical power and have large bandwidth. Through a combination of high coherent gain and small integration time, a large signal-to-noise ratio can be achieved. Operation at high optical power levels reduces the significance of photodiodes’ dark current. As a result, uncooled operation at room temperature is feasible, simplifying the overall instrument design.

Posted in: Briefs, Photonics, Optics, Remote sensing, Cooling

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Coming Soon - Enhanced Tailpipe, Material Emission, and Leak Analysis with SIFT-MS

In Conjunction with SAERegulators and consumers demand increasingly lower levels of gaseous emissions from diverse automotive and aerospace sources, such as combustion exhaust, component emissions, and leakage. Emission compositions vary widely between sources but frequently consist of both volatile organic compounds (VOCs) and inorganic gases.

Posted in: Upcoming Webinars, Automotive, Materials

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Coming Soon - New SAE Standards on Additive Manufacturing: World’s First for Aerospace Industry

In Conjunction with SAEThis SAE Standards Webinar will outline the specification structure and strategy for specifications encompassing additive manufacturing processes and materials. Topics will include the interconnected relationship between the precursor materials, process, and resulting fabricated materials specifications for additive manufacturing. Baseline specifications for metallic materials using laser powder bed fusion form the basis from which it is expected other AM material and process specifications will be modeled.

Posted in: Upcoming Webinars, Aerospace, Manufacturing & Prototyping

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Today’s Advanced Hose And Hydraulic Systems

If you’re under pressure to pick the right components to keep your hydraulic hose assemblies running at peak performance—without incidents or downtime—you’re not alone.

Posted in: White Papers, Motion Control, Automation

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Technical Webinar Series from the Editors of SAE: Hybrid & EV Propulsion

In Conjunction with SAEGreater use of vehicle electrification is essential for OEMs to meet the far more stringent global CO2 emission standards coming early in the next decade, and the technologies related to batteries, power control, and e-motors are progressing steadily. New vehicle electrical architectures, including 48-V hybrid systems and lower-cost EV drives, are poised to play a major role. In this 60-minute Webinar, experts discuss what’s over the technology horizon and what challenges engineers face as the plug-in future approaches.

Posted in: On-Demand Webinars, Propulsion

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Interface Simplifies Remote Robot Operation

Georgia Institute of Technology researchers created a new interface to remotely control robots that is much simpler and more efficient than current techniques. The user simply points and clicks on an item, then chooses a grasp. The robot does the rest of the work. The traditional interface for remotely operating robots employs a computer screen and mouse to independently control six degrees of freedom, turning three virtual rings and adjusting arrows to get the robot into position to grab items or perform a specific task. But for someone who isn’t an expert, the ring-and-arrow system is cumbersome and error-prone. It’s not ideal, for example, for older people trying to control assistive robots at home.

Posted in: News, Motion Control, Robotics, Software

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Fabrication of Freeform Optics

Freeform surfaces on optical components have become an important design tool for optical designers. Non-rotationally symmetric optical surfaces have made solving complex optical problems easier. The manufacturing and testing of these surfaces has been the technical hurdle in freeform optic’s wide-spread use. Computer Numerically Controlled (CNC) optics manufacturing technology has made the fabrication of optical components more deterministic and streamlined for traditional optics and aspheres. Optimax has developed a robust freeform optical fabrication CNC process that includes generation, high speed VIBE polishing, sub-aperture figure correction, surface smoothing and testing of freeform surfaces. Metrology of freeform surface is currently achieved with coordinate measurement machines (CMM) for lower resolution and interferometry with computer generated holograms (CGH) for high resolution irregularity measurements.

Posted in: White Papers, Imaging, Optics, Photonics, Test & Measurement

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