May 2011

Briefs : Energy
Lightweight Magnetic Cooler With a Reversible Circulator
A design of a highly efficient and lightweight space magnetic cooler has been developed at Goddard Space Flight Center that can continuously provide remote/distributed cooling at temperatures in the range of 2 K with a heat sink at about 15 K. The innovative design uses a cryogenic circulator that enables the cooler to operate at a high cycle frequency to achieve a large cooling capacity.
I/Q Digitizer

The ZT8540 I/Q Digitizer from ZTEC Instruments (Albuquerque, NM) functions as a baseband Vector Signal Analyzer (VSA) from DC to 300 MHz. This new baseband VSA provides the signal fidelity and real-time processing capabilities that enable a broad set of necessary RF and wireless test techniques, such as performing EVM (error vector...

Code Generation Software

MathWorks (Natick, MA) has announced the availability of MATLAB Coder, which

enables design engineers to automatically generate readable, portable C and

C++ code directly from their MATLAB algorithms. This new product eliminates

the need to manually translate MATLAB algorithm code into C and C++...

Piezoelectric Signal Conditioner

Meggitt Sensing Systems (San Juan Capistrano, CA) has introduced the Endevco® model 133, a three-channel general purpose piezoelectric signal conditioner with a wide bandwidth of 100 KHz (-3 dB corner), designed to condition

accelerometer output signals within modal and structural analysis, NVH,...

Buck Regulators

Allegro MicroSystems (Worcester, MA) has announced two new robust automotive grade buck regulators with high switching frequency and output current, each integrating a low resistance, high-side, N-channel MOSFET. Allegro’sA8582/A8583 devices incorporate current-mode control to provide excellent loop stability and transient...

Demonstrator PCB

Elan Digital System’s (Fareham, UK) USBHC869 USB interface chip now has a Demonstrator PCB including SDK driver code to help engineers simplify and speed up the development task of implementing the capability of the chip.Windows CE and Linux (Android) driver software are also available for this chip. The USBHC869 chip is...

News : Energy
May Issue of Lighting Technology Now Available

This issue of Lighting Technology has more new feature articles, application stories, tech briefs, products, and research news - all on the latest advances in LEDs and solid-state lighting.

Briefs : Lighting
Photoluminescent Nanofibers for High-Efficiency Solid-State Lighting

Polymer nanofibers are nanoscale materials whose properties can be adjusted to provide desirable light management performance for high efficiency solid-state lighting luminaires. The polymeric nanofibers at the core of this project have diameters on the order of 100 to 1000nm...

News : Green Design & Manufacturing
Splitting Water to Create Renewable Energy: Simplified

An international team of scientists led by a team at Monash University of Melbourne, Australia has found that the key to the hydrogen economy could come from a very simple mineral - commonly seen as a black stain on rocks.

News : Energy
Researchers Counteract Biofuel Toxicity in Microbes

Advanced biofuels are highly touted as potential replacements for gasoline, diesel, and jet fuels. Equally touted is the synthesis of these fuels through the use of microbes. However, many of the best candidate compounds for advanced biofuels are toxic to microbes, which presents a...

Articles : Green Design & Manufacturing
Cool and Green: Vehicle Thermal Management

Air conditioning is a ‘must-have’ for most new cars. But the fluorocarbon refrigerant HFC-134a – the global standard – is one of the ozone-depleting greenhouse gases causing global warming. With these concerns, the European Union has passed regulations phasing out the compound beginning in 2011...

Briefs : Green Design & Manufacturing
Improved, Low-Stress Economical Submerged Pipeline

A preliminary study has shown that the use of a high-strength composite fiber cloth material may greatly reduce fabrication and deployment costs of a subsea offshore pipeline. Above-water pipelines are often not feasible due to safety, cost, and environmental problems, and present, fixed-wall,...

Behind the Mars Science Laboratory Design

I spent part of the week at the 2011 Siemens PLM Connection Americas Users Conference (in Las Vegas!). William Allen, senior engineer at the Jet Propulsion Laboratory and mechanical systems design lead on the Mars Science Laboratory (MSL), spoke to the crowd about how the JPL, based in Pasadena, CA,...

Innovation: A Game for All Ages

FIRST (For Inspiration and Recognition of Science and Technology) recently wrapped up its BODY FORWARD Challenge. Teams were asked to explore bio-engineering possibilities and discover innovative ways to improve and maximize the body's potential.

The winning team, known as the "Flying Monkeys," will receive...

Briefs : Green Design & Manufacturing
Radiation-Resistant Hybrid Lotus Effect for Achieving Photoelectrocatalytic Self-Cleaning Anticontamination Coatings

This innovation from Goddard Space Flight Center is an antibacterial, anti-contamination, and self-cleaning coating that uses nano-sized semiconductor semimetal oxides to neutralize biological pathogens and toxic chemicals, as...

Briefs : Physical Sciences
High-Temperature Thermometer Using Cr-Doped GdAlO3 Broadband Luminescence

A new concept has been developed for a high-temperature luminescence-based optical thermometer that both shows the desired temperature sensitivity in the upper temperature range of present state-of-the-art luminescence thermometers (above 1,300 °C), while maintaining...

Briefs : Physical Sciences
Method to Estimate the Dissolved Air Content in Hydraulic Fluid

In order to verify the air content in hydraulic fluid, an instrument was needed to measure the dissolved air content before the fluid was loaded into the system. The instrument also needed to measure the dissolved air content in situ and in real time during the de-aeration process....

Briefs : Physical Sciences
Method for Measuring Collimator-Pointing Sensitivity to Temperature Changes

For a variety of applications, it is important to measure the sensitivity of the pointing of a beam emerging from a collimator, as a function of temperature changes. A straightforward method for carrying out this measurement is based on using interferometry for...

Briefs : Physical Sciences
Metrology Arrangement for Measuring the Positions of Mirrors of a Submillimeter Telescope

The position of the secondary mirror of a submillimeter telescope with respect to the primary mirror needs to be known ≈0.03 mm in three dimensions. At the time of this reporting, no convenient, reasonably priced arrangement that offers this capability...

Briefs : Electronics & Computers
On-Wafer S-Parameter Measurements in the 325-508-GHz Band

New circuits have been designed and fabricated with operating frequencies over 325 GHz. In order to measure S-parameters of these circuits, an extensive process of wafer dicing and packaging, and waveguide transition design, fabrication, and packaging would be required. This is a costly...

Briefs : Electronics & Computers
Reconfigurable Microwave Phase Delay Element for Frequency Reference and Phase-Shifter Applications

A technique was developed to provide a reconfigurable high-precision microwave electrical phase delay for resonators and phase shifters. The invention employs multiple branches of transmission lines with open-ended or ground-ended terminations as...

Briefs : Electronics & Computers
High-Throughput, Adaptive FFT Architecture for FPGA-Based Spaceborne Data Processors

Exponential growth in microelectronics technology such as field-programmable gate arrays (FPGAs) has enabled high-performance spaceborne instruments with increasing onboard data processing capabilities. As a commonly used digital signal processing (DSP) building...

Briefs : Electronics & Computers
High-Speed Isolation Board for Flight Hardware Testing

There is a need to provide a portable and cost-effective galvanic isolation between ground support equipment and flight hardware such that any unforeseen voltage differential between ground and power supplies is eliminated. An interface board was designed for use between the ground support...

Briefs : Software
3D Orbit Visualization for Earth-Observing Missions

This software visualizes orbit paths for the Orbiting Carbon Observatory (OCO), but was designed to be general and applicable to any Earth-observing mission. The software uses the Google Earth user interface to provide a visual mechanism to explore spacecraft orbit paths, ground footprint...

Briefs : Software
MaROS: Web Visualization of Mars Orbiting and Landed Assets

Mars Relay operations currently involve several e-mails and phone calls between lander and orbiter teams in order to settle on an agreed time for performing a communication pass between the landed asset (i.e. rover or lander) and orbiter, then back to Earth. This new application aims to...

Briefs : Software
RAPID: Collaborative Commanding and Monitoring of Lunar Assets

RAPID (Robot Application Programming Interface Delegate) software utilizes highly robust technology to facilitate command-ing and monitoring of lunar assets. RAPID provides the ability for intercenter communication, since these assets are developed in multiple NASA centers.

Briefs : Software
Image Segmentation, Registration, Compression, and Matching

A novel computational framework was developed of a 2D affine invariant matching exploiting a parameter space. Named as affine invariant parameter space (AIPS), the technique can be applied to many image-processing and computer-vision problems, including image registration, template...

Briefs : Software
Image Calibration

Calibrate_Image calibrates images obtained from focal plane arrays so that the output image more accurately represents the observed scene. The function takes as input a degraded image along with a flat field image and a dark frame image produced by the focal plane array and outputs a corrected image. The three most prominent...

Briefs : Software
Rapid ISS Power Availability Simulator

The ISS (International Space Station) Power Resource Officers (PROs) needed a tool to automate the calculation of thousands of ISS power availability simulations used to generate power constraint matrices. Each matrix contains 864 cells, and each cell represents a single power simulation that must be run....

Briefs : Manufacturing & Prototyping
Optimization of Indium Bump Morphology for Improved Flip Chip Devices

Flip-chip hybridization, also known as bump bonding, is a packaging technique for microelectronic devices that directly connects an active element or detector to a substrate readout face-to-face, eliminating the need for wire bonding. In order to make conductive links between...

Briefs : Manufacturing & Prototyping
Pre-Finishing of SiC for Optical Applications

A method is based on two unique processing steps that are both based on deterministic machining processes using a single-point diamond turning (SPDT) machine. In the first step, a high-MRR (material removal rate) process is used to machine the part within several microns of the final geometry. In the...

Briefs : Manufacturing & Prototyping
A Method of Strengthening Composite/Metal Joints

The term “tape setback method” denotes a method of designing and fabricating bonded joints between (1) box beams or other structural members made of laminated composite (matrix/ fiber) materials and (2) metal end fittings used to fasten these structural members to other structural members. The...

Briefs : Materials
Measuring Moisture Levels in Graphite Epoxy Composite Sandwich Structures

Graphite epoxy composite (GEC) materials are used in the construction of rocket fairings, nose cones, interstage adapters, and heat shields due to their high strength and light weight. However, they absorb moisture depending on the environmental conditions they are exposed...

Briefs : Materials
Optimized Li-Ion Electrolytes Containing Triphenyl Phosphate as a Flame-Retardant Additive

A number of future NASA missions involving the exploration of the Moon and Mars will be “human-rated” and thus require high-specific-energy rechargeable batteries that possess enhanced safety characteristics. Given that Li-ion technology is the most...

Briefs : Materials
Real-Time Deposition Monitor for Ultrathin Conductive Films

A device has been developed that can be used for the real-time monitoring of ultrathin (2 Å or more) conductive films. The device responds in less than two microseconds, and can be used to monitor film depositions up to about 60 Å thick. Actual thickness monitoring capability will...

Briefs : Materials
Marshall Convergent Spray Formulation Improvement for High Temperatures

The Marshall Convergent Coating-1 (MCC-1) formulation was produced in the 1990s, and uses a standard bisphenol A epoxy resin system with a triamine accelerator. With the increasing heat rates forecast for the next generation of

vehicles, higher-temperature sprayable...

Briefs : Physical Sciences
Super Dwarf Wheat for Growth in Confined Spaces

USU-Perigee is a dwarf red spring wheat that is a hybrid of a high-yield early tall wheat (USU-Apogee) and a low-yield, extremely short wheat that has poor agronomic characteristics. USU-Perigee was selected for its extremely short height (≈0.3 m) and high yield — characteristics that make it...

Briefs : Physical Sciences
Dielectric Covered Planar Antennas at Submillimeter Wavelengths for Terahertz Imaging

Most optical systems require antennas with directive patterns. This means that the physical area of the antenna will be large in terms of the wavelength. When non-cooled systems are used, the losses of microstrip or coplanar waveguide lines impede the use of...

Briefs : Physical Sciences
Local Leak Detection and Health Monitoring of Pressurized Tanks

An optical gas-detection sensor safely monitors pressurized systems (such as cryogenic tanks) and distribution systems for leaks. This sensor system is a fiber-coupled, solid optical body interferometer that allows for the miniaturized sensing element of the device to be placed in...

Briefs : Physical Sciences
Single-Antenna Temperature- and Humidity-Sounding Microwave Receiver

For humidity and temperature sounding of Earth’s atmosphere, a single-antenna/LNA (low-noise amplifier) is needed in place of two separate antennas for the two frequency bands. This results in significant mass and power savings for GeoSTAR that is comprised of hundreds of...

Briefs : Physical Sciences
Broadband Achromatic Phase Shifter for a Nulling Interferometer

Nulling interferometry is a technique for imaging exoplanets in which light from the parent star is suppressed using destructive interference. Light from the star is divided into two beams and a phase shift of π radians is introduced into one of the beams. When the beams are...

Briefs : Physical Sciences
Fine Guidance Sensing for Coronagraphic Obser vatories

Three options have been developed for Fine Guidance Sensing (FGS) for coronagraphic observatories using a Fine Guidance Camera within a coronagraphic instrument. Coronagraphic observatories require very fine precision pointing in order to image faint objects at very small distances from a...

Briefs : Information Technology
Ascent Heating Thermal Analysis on Spacecraft Adaptor Fairings

When the Crew Exploration Vehicle (CEV) is launched, the spacecraft adaptor (SA) fairings that cover the CEV service module (SM) are exposed to aero heating. Thermal analysis is performed to compute the fairing temperatures and to investigate whether the temperatures are within the...

Briefs : Information Technology
Prioritized LT Codes

The original Luby Transform (LT) coding scheme is extended to account for data transmissions where some information symbols in a message block are more important than others. Prioritized LT codes provide unequal error protection (UEP) of data on an erasure channel by modifying the original LT encoder. The prioritized...

Briefs : Information Technology
Fast Image Texture Classification Using Decision Trees

Texture analysis would permit improved autonomous, onboard science data interpretation for adaptive navigation, sampling, and downlink decisions. These analyses would assist with terrain analysis and instrument placement in both macroscopic and microscopic image data products. Unfortunately,...

Briefs : Information Technology
More-Accurate Model of Flows in Rocket Injectors

An improved computational model for simulating flows in liquid-propellant injectors in rocket engines has been developed. Models like this one are needed for predicting fluxes of heat in, and performances of, the engines. An important part of predicting performance is predicting fluctuations of...

Briefs : Information Technology
Improved Systematic Pointing Error Model for the DSN Antennas

New pointing models have been developed for large reflector antennas whose construction is founded on elevation over azimuth mount. At JPL, the new models were applied to the Deep Space Network (DSN) 34-meter antenna’s subnet for corrections of their systematic pointing errors; it...

Briefs : Information Technology
Observability and Estimation of Distributed Space Systems via Local Information-Exchange Networks

Spacecraft formation flying involves the coordination of states among multiple spacecraft through relative sensing, inter-spacecraft communication, and control. Most existing formation-flying estimation algorithms can only be supported via highly...

Briefs : Information Technology
In-Orbit Instrument-Pointing Calibration Using the Moon as a Target

A method was developed for in-orbit measurement of the relative pointing of spectrometer channels, and the relationship between the spectrometer channels and the spacecraft coordinate system. In this innovation, individual scans of the Moon, from the three channels, were used to...

Briefs : Information Technology
Constraint Embedding Technique for Multibody System Dynamics

Multibody dynamics play a critical role in simulation testbeds for space missions. There has been a considerable interest in the development of efficient computational algorithms for solving the dynamics of multibody systems. Mass matrix factorization and inversion techniques and the...

Briefs : Information Technology
Entanglement in Self-Supervised Dynamics

A new type of correlation has been developed similar to quantum entanglement in self-supervised dynamics (SSD). SSDs have been introduced as a quantum-classical hybrid based upon the Madelung equation in which the quantum potential is replaced by an information potential. As a result, SSD preserves the...

Briefs : Electronics & Computers
Reliability of Ceramic Column Grid Array Interconnect Packages Under Extreme Temperatures

A paper describes advanced ceramic column grid array (CCGA) packaging interconnects technology test objects that were subjected to extreme temperature thermal cycles. CCGA interconnect electronic package printed wiring boards (PWBs) of polyimide were...

Briefs : Mechanical & Fluid Systems
Six Degrees-of-Freedom Ascent Control for Small-Body Touch and Go

A document discusses a method of controlling touch and go (TAG) of a spacecraft to correct attitude, while ensuring a safe ascent. TAG is a concept whereby a spacecraft is in contact with the surface of a small body, such as a comet or asteroid, for a few seconds or less before...

Briefs : Mechanical & Fluid Systems
Optical-Path-Difference Linear Mechanism for the Panchromatic Fourier Transform Spectrometer

A document discusses a mechanism that uses flex-pivots in a parallelogram arrangement to provide frictionless motion with an unlimited lifetime. A voice-coil actuator drives the parallelogram over the required 5-cm travel. An optical position sensor...

MTS 360 non-contacting SMD rotary position sensor

Piher International Corp., Libertyville, IL, has announced the MTS 360 non-contacting SMD rotary position sensor that combines a through-shaft design with 360° absolute position feedback in an ultra-miniature size. Measuring 6 x 17 x 18 mm, the sensor can be integrated directly onto a PCB. The...

Who's Who
Chad R. Frost, Intelligent Systems Division’s Area Lead for Autonomous Systems and Robotics, NASA Ames Research Center, Moffett Field, CA

Chad R. Frost supervises the Autonomous Systems and Robotics (ASR) technical area in Ames Research Center's Intelligent Systems Division. ASR staff develops advanced automation and control technologies to...

Chad R. Frost, Intelligent Systems Division’s Area Lead for Autonomous Systems and Robotics, NASA Ames Research Center, Moffett Field, CA

Chad R. Frost supervises the Autonomous Systems and Robotics (ASR) technical area in Ames Research Center's Intelligent Systems Division. ASR staff develops advanced automation and control technologies to...

Articles : Energy
Microinverters Are Launching a Solar Renewable Revolution

Given that solar-photovoltaic (PV) generating technology has been around for decades, one might think its general application in commercial and consumer circles might be a little more pervasive. After all, it is clean, safe, and relatively simple. Ask any expert and it’s likely you’ll...

Application Briefs : Software
Software Helps NASA Develop Next-Generation Air Vehicles
PHX ModelCenter® software
Phoenix Integration
Wayne, PA

Phoenix Integration’s PHX ModelCenter® software has been used by NASA to create a robust, physics-based design and analysis framework to be used early in the design...

Application Briefs : Imaging
Multispectral Camera to Photograph Vegetation from the International Space Station
FluxData FD-1665 3CCD Multispectral Camera
FluxData Inc.
Rochester, NY

FluxData has launched a multispectral imager on a mission to the International Space Station (ISS). The FluxData FD-1665 3CCD...

Techs for License
Soft-Feel Grain Surface Treatment for Hard Plastic Mimics Sensation on Fingertips

This technology gives hard-surface plastics a soft and moist feel by imposing a “grain” or texturing onto the surface. It has application in automotive interiors, household utensils, electronics, mobile phones, and other locations where a hard plastic surface...

Techs for License
Development of Organic Materials that Melt by Light Irradiation

AIST has developed organic materials that melt from solid to liquid with only the irradiation of light, without heating, and can be restored to their original solid state. Unlike irreversible photosensitive resins, which cannot be restored to their original state after their state...

NASA Tech Needs
Quick and Easy Way to Identify Beryllium Contamination and Assess its General Level

A company seeks a simple, real-time way to identify that a plant area is clear of beryllium contamination and, if it is not, to obtain a general assessment of the level of contamination that may be present without having to send swabs to a laboratory for testing....

NASA Tech Needs
Rheology Modification for Phase-Inversion Mini-Emulsion Formulation

An organization seeks expertise or technology to modify the viscosity of a mini-emulsion during storage to prevent leakage of the liquid from its container at 35 °C and above. During storage in an ambient-pressure container, the mini-emulsion must maintain a high viscosity so...

NASA Tech Needs
Cathode Assembly for Molten Regolith Electrolysis

The production of oxygen and metals from off-Earth planetary materials (regolith or rocks) is an important focus area of technology development led by the In-Situ Resource Utilization (ISRU) Project. Over the past few years, oxygen production by direct electrolysis of lunar oxides in molten form...

Articles : Robotics, Automation & Control
Jet Propulsion Laboratory

Jet Propulsion Laboratory (JPL), a division of the California Institute of Technology, is a Federally Funded Research and Development Center (FFRDC) of NASA. The Laboratory has a wide-ranging charter for solar system exploration, Earth observation, astrophysical research, and technology development. It is located on 176...

Briefs : Sensors/Data Acquisition
Biosensing Technology Offers Advanced Diagnostic Capabilities

Electronic biosensing technology could someday displace the multi-welled microplate, long a standard tool in biomedical research and diagnostic laboratories. Essentially arrays of tiny test tubes, microplates have been used for decades to simultaneously test multiple samples for their...

Briefs : Materials
Die Extrusion Technology for Medical Tubing Applications

Although the concept of nanotechnology (controlling matter on an atomic scale) dates back to 1959, it is only now becoming more commercially realized. It has the potential to challenge the way all products are extruded in almost every type of medical tubular or related industrial product...

Briefs : Medical
Blood Pressure Monitoring Tool

The MDMouse system incorporates a pre-existing medical device into a conventional computer control mouse. The tool is designed to measure blood pressure outside of the medical environment, and to provide that information for use by individuals, clinical evaluation companies (CROs), healthcare providers, and...

Briefs : Medical
Laser Sintering for Customized Medical Applications

Engineers have long been aware of the potential of laser sintering to create innovative and beneficial medical products. Because it is an additive (layer-by-layer) manufacturing process, laser sintering can build parts free of the traditional constraints imposed by machining or...

Briefs : Medical
Cubic-Millimeter Energy-Autonomous Wireless Intraocular Pressure Monitor

A prototype implantable eye pressure monitor for glaucoma patients is believed to contain the first complete millimeter-scale computing system. The pressure monitor is designed to be implanted in the eye to conveniently and continuously track the progress of glaucoma, a...

Briefs : Medical
Single, Stationary Lens Able to Create Microscopic 3D Images

A lens that enables microscopic objects to be seen from nine different angles at once to create a 3D image has been developed. Other 3D microscopes use multiple lenses or cameras that move around an object; the new lens is the first single, stationary lens to create microscopic 3D...

Features : Photonics/Optics
Laser Beam vs. Electron Beam Welding Which process works best for what?

Proponents of laser beam welding (LBW) and electron beam (EBW) welding each pronounce the singular praises of their favored technology, but often the best solution for a customer is to use both technologies together. Both processes are well suited to joining components with...

Briefs : Physical Sciences
Optical Fiber Array Assemblies for Space Flight on the Lunar Reconnaissance Orbiter

Custom fiber optic bundle array assemblies developed by the Photonics Group at NASA Goddard Space Flight Center were an enabling technology for both the Lunar Orbiter Laser Altimeter (LOLA) and the Laser Ranging (LR) Investigation on the Lunar Reconnaissance...

Briefs : Photonics/Optics
Automated Cryocooler Monitor and Control System

A system was designed to automate cryogenically cooled low-noise amplifier systems used in the NASA Deep Space Network. It automates the entire operation of the system including cool-down, warm-up, and performance monitoring. The system is based on a single-board computer with custom software and...

Application Briefs : Photonics/Optics
Making Machine Vision Systems Smarter

Machine vision technology is used extensively throughout manufacturing to improve product quality, increase productivity and reduce costs. One of the reasons for that is a machine vision system will work tirelessly on mundane repetitive tasks at high speed with great precision.

Briefs : Photonics/Optics
Multi-Wavelength, Multi-Beam, and Polarization-Sensitive Laser Transmitter for Surface Mapping

A multi-beam, multi-color, polarized laser transmitter has been developed for mapping applications. It uses commercial off-the-shelf components for a low-cost approach for a ruggedized laser suitable for field deployment.

Briefs : Physical Sciences
Optical Communications Link to Airborne Transceiver

An optical link from Earth to an aircraft demonstrates the ability to establish a link from a ground platform to a transceiver moving overhead. An airplane has a challenging disturbance environment including airframe vibrations and occasional abrupt changes in attitude during flight. These...

News : Lighting
Jewel-Toned Organic Phosphorescent Crystals: A New Class of Light-Emitting Material

Pure organic compounds that glow in jewel tones could potentially lead to cheaper, more efficient, and flexible display screens, among other applications. University of Michigan researcher Jinsang Kim and his colleagues have developed a new class of material that...

Glass and transparent plastics, especially acrylic resins, have long been used in the lighting industry for various aesthetic and functional purposes. As the industry has evolved,...

Articles : Lighting
Differences Between Color Measurement Systems

Industry professionals and researchers engaged in the measurement and characterization of light sources are confronted by the age old question — should an instrument be utilized which employs spectroradiometric technology, or should tristimulus colorimetry technology based instruments be used to...

Articles : Lighting
Pursuing Reliable LEDs

Semiconductor-based light-emitting diode (LED) devices first appeared in the 1960s. Today, with the advances in materials, design, and manufacture of LED devices, we are seeing a wide spectrum of LEDs that are cheaper, more colorful, more efficient, more intense, and more reliable.

Briefs : Lighting
Photoluminescent Nanofibers for High-Efficiency Solid-State Lighting

Polymer nanofibers are nanoscale materials whose properties can be adjusted to provide desirable light management performance for high-efficiency solid-state lighting (SSL) luminaires. The polymeric nanofibers at the core of this project have diameters on the order of 100 to...

Briefs : Lighting
White Scattered Photon Extraction LEDs with Multi-Phosphor Layers

Early phosphor-converted white light-emitting diodes (LEDs) produced light with poor color characteristics in terms of color rendering index (CRI) and correlated color temperature (CCT). More recent LEDs have improved their color properties by combining multiple phosphors instead...

Application Briefs : Lighting
Airfield Lighting Heated Lens
Kopp Glass, Pittsburgh, PA

Incandescent lamps have been used as the primary light source in airfield lighting designs for many years. With recent environmental awareness of the general population and government regulation forcing greater energy efficiency, the lighting industry is rapidly transitioning to...

Application Briefs : Lighting
LED Wingtip Navigation Lighting
Honeywell, Phoenix, AZ
Airbus, Toulouse, France

Honeywell's light-emitting diode (LED) wingtip navigation lighting is now standard on new production Airbus A320 Family aircraft, comprising the A318, A319, A320, and A321. Honeywell’s LED wingtip navigation lighting lasts up to 40 times longer than...

Techs for License : Lighting
Extensible Light-Sensing LED Array

This technology involves the use of an extensible array of light-emitting diodes (LEDs) as a means of sensing incident light levels. The light-sensing LED array can be used to construct highly-dynamic backlights for displays and large-format synthetic aperture cameras.

Products : Lighting
Curvable LED Display

The F-6 curvable LED display from Pixled (Ostend, Belgium) features convex and concave curvability on both the horizontal and vertical planes. The F-6 can be shaped into a combination of both directions on both planes via integrated mechanics on each module. This can be achieved quickly and simply with no additional tools or...

Products : Lighting
LED Array

Cree, Inc. (Durham, NC) offers the XLamp® CXA20 LED array, which can enable a 60-watt A-lamp equivalent while consuming 11 watts. With a single, uniform optical source, compact 22mm x 22mm footprint, and two-screw attachment, the CXA20 array simplifies the manufacturing process for customers who require a single component in their...

Products : Lighting
Self-Retaining LED Mounting Spacers

Self-retaining, T-1 LED mounting spacers designed to assure uniform and perpendicular LED positioning while reducing assembly costs are available from Keystone Electronics Corp. (Astoria, NY). The spacers feature internal retention “teeth” which secure spacers onto LED leads, prior to assembly on PCBs. The...

Products : Lighting
Flexible LED Backlight

Lumex (Palatine, IL) introduces QuantumBrite flexible LED backlight technology. Customizable in any shape, size, and color, QuantumBrite flexible LED backlights are up to 88% thinner and can cost up to 80% less than standard LED backlight technology. The QuantumBrite flexible LED backlight is made out of an ultra-thin...

Products : Lighting
LCD-LED Driver Cross-Reference Guide

Endicott Research Group, Inc. (ERG) (Endicott, NY) has updated its online LCD-LED Driver Cross- Reference Guide. The online guide has datasheets on over 200 drivers supporting more than 150 OEM panels. It has been updated with ERG’s line of full-function drivers for LED-backlit industrial LCDs in the 5.7"...

Products : Lighting
Stacked Flat Type Light Guide Panel

At 6mm thick, the stacked flat type light guide panel from DynaScan Technology (Taipei, Taiwan) is an assembly of simple flat light guides, without any curvature or wedge angle, allowing over 90% light output efficiency. Due to the flat lightguide structure and front space providing an adjustable long...


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Heavy-Duty Engine Design for a Transitioning Market

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Upcoming Webinars: Photonics/Optics

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