Search White Papers
Nanophotonics And Integrated Optics Photonic Crystal Cavities Whitepaper
The release of CST's white paper, 'Nanophotonics and Integrated Optics – Photonic Crystal Cavities' offers engineers details of which type of photonic crystal cavities are best suited to certain applications and outlines their general properties. Hands-on examples and application descriptions, such as the WDM channel filter, are illustrated in order to demonstrate how specific antenna design projects can be carried out using CST MICROWAVE STUDIO.
Finisar Introduces Optical Test Instrument for High-Resolution Spectral Analysis in R&D and Production Applications
Finisar Corporation today introduced the WaveAnalyzer 1500S High-Resolution Optical Spectrum Analyzer. The WaveAnalyzer 1500S provides a unique combination of ultra-high resolution and high-speed spectral analysis making it ideal for Research & Development as well as Production applications. This optical test instrument utilizes coherent detection and offers sub-picometer wavelength resolution across the entire C-band of optical communication systems. For example, a full C-band scan with 20 MHz spectral resolution takes only 1/4 of a second while a detailed spectral analysis of a 100 GHz window can be obtained in under 25 milliseconds.
Atmel Expands Family of maXTouch S Controllers with Enhanced Nodes and Capabilities
Atmel Corporation today announced the Atmel mXT540S, expanding its maXTouch S family of touch controllers further supporting the trend of designing larger screens into hand-held devices of various types.
Agilent Technologies Redefines the Oscilloscope Experience with the InfiniiVision 4000 X-Series
Agilent Technologies Inc today introduced the groundbreaking InfiniiVision 4000 X-Series digital-storage and mixed-signal oscilloscopes. This new series establishes unprecedented levels of flexibility and ease of use among units that use an embedded operating system.
Atmel maXTouch Controller Powers Touchscreen for Samsung’s Galaxy S III ‘Mini’ Smartphone
Atmel Corporation today announced Atmel's maXTouch mXT224S controller is powering the touchscreen in the recently launched Samsung Galaxy S III 'Mini' smartphone.
Atmel Expands into Rapidly Growing Ultrabook and Notebook Markets with New Windows 8 Certified MXT3432S
Atmel Corporation today announced sampling of the maXTouch S Series touchscreen controllers designed for the rapidly growing Ultrabook and notebook markets. Building upon the success of the maXTouch S Series, the new Windows 8 Certified Atmel mXT3432S is a touchscreen controller with a small footprint optimized for touchscreens up to 17.3 inches.
Waste and recycling facility cuts lighting energy needs by 68% using LEDS
Oxigen Environmental manages the waste streams of 100,000 domestic, commercial and industrial customers in Ireland. The company prides itself on utilising sustainable solutions to maximise resource efficiency through recycling and energy regeneration.
Synopsys' CODE V Optical Design Software reduces manufacturing costs
Synopsys today announced the availability of Synopsys' CODE V Optical Design Software, version 10.5, which offers new and improved optimization and tolerancing capabilities for the design of high-performance optical systems with reduced sensitivity to manufacturing and alignment errors.
Echelon Highlights Fast Payback Applications for Smart Street Lighting and Smart Buildings at the Light+Building Fair
Echelon Corporation will showcase several Smart Street Lighting and Smart Building solutions, built on Echelon's proven, open standard, multi-application energy control networking platform, at the world's leading trade fair for lighting and intelligent buildings, Light+Building, held at the Frankfurt Fair and Exhibition Centre on April 15-20 in Hall 9.0, Booth E10. Echelon and its partners will demonstrate how these solutions reduce energy use and carbon emissions while providing better end-user comfort and safety.
New Digital Door Sign Interface Kits – Exceed your Expectations
Enhanced LCD solution for Digital Signage`s fast growing area of digital door signs. Designed and approved by Display Solution AG, the new line of digital door sign interface kits matches all technical requirements with impressive benefits and extra features at a significantly lower price.
An Overview of Diode Lasers for Defense Applications
Diode lasers emitting from the visible red to 2.2 microns and beyond have broad utility in the defense space. Pumping applications range from fiber and solid state directed energy laser weapons including DPALs, eye safe lasers to include LIDAR, to infrared counter measures. Direct diode uses include illuminators from the near IR to the eye safe regime as well as countermeasures.
New Broad Spectrum Fiber for Fiber Sensor and Spectroscopy Applications
In the fields of fiber sensing and spectroscopy, many applications require the capability to measure optical signals across a very wide spectral range. Historically, optical fibers have been limited in their transmission spectral range. Fibers with high -OH content perform better at UV wavelengths. However, the -OH content creates very large absorption regions in the Near Infrared (NIR) wavelengths, particularly at 980, 1250 and 1383nm. Conversely, fibers with low -OH content can perform very well in the NIR region of the spectrum, but have very poor UV performance. Both types of traditional fibers transmit well in most of the visible spectrum.
Choice of Laser Sources for Micromachining Apps
To date majority of the micromachining applications have been addressed with the lamp pumped pulsed Nd:YAG laser. However, the increasing complexity of microelectronics/ engineering devices and the requirement for higher yields and automated production systems place stringent demands on the micromachining techniques. This has led to development of new laser sources fiber and dick lasers etc. These lasers with diffraction limited beam quality offer many advantages such as small spot size, high power density, enhanced processing speeds, reduced heat affected zone for a range of micromachining applications.
Damage Resistance of FiberTech Fibers for High Power Laser Applications
In cooperation with the BAM Federal Institute for Materials Research and Testing in Berlin, FiberTech optical fibres were characterized with respect to their damage resistance against high-power laser radiation.
Design and fabrication of low-cost thermal imaging optics using precision chalcogenide glass molding
Aspheric and diffractive surfaces in infrared materials are traditionally fabricated by single point diamond turning, which is a high-cost, low-throughput process, not suitable for low-cost, high-volume applications. Precision molding of chalcogenide glasses is a novel process we developed to allow the efficient fabrication of quality infrared optics in large volumes. In this paper we present the advantages and particularities of designing thermal imaging lenses for high-volume applications using precision molded chalcogenide glasses.
Super small 4-chip LEDs – Federal FM Series is now available.
The newly launched super small 4-10W 4-chip LED Series is now available in the full spectrum of white and RGBA, RGBW, RGGB multi colors. It offers great performance in a single ultra small component of only 5mm x 5mm. The super mini size allows designers to develop a much simpler optics and consequently help to reduce the overall system cost.
Handling of Silicone Resin LEDs
In recent years, the brightness of LEDs has continually increased, allowing them to be used in completely new application areas. Due to the strong increase in brightness, the bonded system of chip and housing takes on increased significance.
Warranty Cost Savings of LED Signal Lights
LED lamps have a significantly higher reliability than incandescent bulbs. The potential savings in warranty repair when using LEDs instead of incandescent bulbs is highly attractive for automotive signal lamps—especially center high mount stop lamps (CHMSLs) and rear combination lamps.
Drives 1 high brightness LED at a constant current of 1000 mA from 5V to 30V input.
The LM3485 design is a buck regulator derived controlled current source designed to drive high power, high brightness LEDs (HBLEDs) at a constant current of 1.0A. The design can accept an input voltage ranging from 5V to 30V and can control the output current delivered to series and/or parallel arrays of HBLEDs as long as the forward voltage of all the LEDs in series is less than 0.9 x Vin. The accuracy of the output current is +-10%.
Flexible Light Strip Module
The design guide describes the reference design hardware and firmware implementation, thus this documentation is useful to streamline the design process and to ensure they design a product into their system/ product correctly.
Cree/NXP Task Light Reference Design
This application note demonstrates that an LED task light can readily outperform its linear fluorescent equivalent and incoperate dimming for mood setting and for additional energy savings.
LEDs and Heat: Managed or Micromanaged?
All of the focus on thermal management of light emitting diodes raises the question: is it always worth the cost? For LEDs, every penny must be applied efficiently. The benefits of lower junction temperature are well known, but there is a tipping point between investing additional product cost in thermal management and getting a return on that investment. Good thermal management starts with clear product and application definition.
Light Guides
Light Guides are used wherever the light of a lightsource should be distributed homogeneously over a particular area, when there is a spatial distance between light source and the area which is to be illuminated.
DN74 ZXSC400 Photoflash LED reference design
This design note shows the ZXSC400 driving a Photoflash LED. The input voltage is 3V with a maximum pulsed output current of 1A for 2ms.
Cree® XLamp® ML-E T8 Reference Design
Several Department of Energy (DOE) CALiPER program tests conducted in 2008-2010 evaluated a broad sample of market-available LED-based T8 lamps and concluded that they do not yet represent a viable option to the fluorescent lamp.
Charge Pump Based Multiple LED Driver
This application note describes a multi−functional system, capable of generating and controlling the power needed to utilized three features available in modern cellular phones. In addition to larger displays, with full color capability, flash and torch features have now been added to support the embedded camera and the night path finder. These features are made possible by using an ultra bright LED powered by standard battery cells.
Reference Design Report for a 5 W Dimmable Power Factor Corrected LED Driver (NonIsolated) Using LinkSwitchTM-PL LNK457DG
This document is an engineering report describing a non-isolated LED driver (power supply) utilizing a LNK457DG from the LinkSwitch-PL family of devices.
High Efficiency (≥85%), High Power Factor (>0.9) 15 W T8 Isolated LED Driver Using LinkSwitchTM-PH LNK406EG
The document describes a power factor corrected LED driver designed to drive a nominal LED string voltage of 50 V at 0.3 A from an input voltage range of 90 VAC to 265 VAC. The LED driver uses the LNK406EG from the LinkSwitch-PH family by Power Integrations.
LED Task Light Reference Design
Designing a SSL linear fixture that exceeds linear fluorescent performance, is cost competitive, and satisfies Energy Star performance criteria requires a system level design approach. By this, we mean that all four system level elements, LED selection, Secondary Optics, SSL Driver Selection/Performance, and Thermal Management must be taken into consideration. NXP, Cree, and Brightview teamed up to design an Under-Cabinet SSL fixture that exceeded linear fluorescent performance, while keeping cost low and satisfying Energy Star performance targets.
Cree® XLamp® LEDs for Distributed Illumination Applications
In the first century of electric lighting, the now universal bulb-luminaire dichotomy gave rise to a variety of basic illumination (lamp or bulb) technologies, thousands of different styles and configurations of these lamps along with tens of thousands of luminaires. A large class of lighting systems, from cove lighting to inceiling troffers are implemented with single (or multiple) linear fluorescent lamps (LFL)
Discrete LEDs vs. Packaged Solutions
Designers use LEDs in three basic applications....either as a diagnostic indicator on a circuit board inside a piece of equipment, for front panel status indication, or illumination. These applications can be served by either discrete LEDs (see Fig. 16) or by packaged solutions such as DialightÕs Circuit Board Indicator (CBI) Series that combines an LED with a plastic housing (see Fig. 17). While discrete LEDs may appear to have an advantage in cost, when the total installed cost of the device is considered, the CBI solution is generally less expensive.
Lighting System Interconnection Levels
The lighting industry is now engaged in a metamorphosis similar to that experienced by the electronics industry in the 70s and 80s. At that time, to address this emerging market, AMP Incorporated developed the six Electronic Packaging Levels. These are now well grounded and used throughout Tyco Electronics to categorize interconnects. In this paper, the author establishes a similar hierarchy directly applicable to current and future lighting systems.
Dimming LEDs with respect to grouping current
In the design of a driving circuit for LEDs, the dimming behaviour is an important topic to fulfil the end customer requirements. The intend of this application note is to describe the behaviour of LEDs in respect to brightness by varying the current and to suggest solutions for avoiding negative influence for the application.
Surface Mount ChipLEDs
An industry leader in high brightness LED technology, Avago Technologies offers a wide range of high quality ChipLED products to meet customer demand for various surface mount lighting requirements. High brightness LED technology offers better efficiency, lower driving current and a smaller number of LEDs. Avago's ChipLED products have the lowest profile in the industry, and are positioned to support high volume, cost effective solutions.
LED Reference Design Cookbook
The LED Reference Design Cookbook is designed to provide you with a valuable tool to help you solve your lighting design needs. Customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of AC/DC, DC/DC, LED drivers, power management devices, wireless and wired interface control and embedded processors.
Thermal Management of Visible LEDs
The purpose of this application bulletin is to answer design questions about high-power visible light emitting diodes (LEDs).
Performance Comparison of Two LED Downlight Designs ChromaLit™ Remote Phosphor Lighting System vs. Conventional White LED System
Conventionally, LED downlights implement white LEDs that are constructed of a blue LED device coated with phosphor. In the application, these LEDs are arranged in combination with a diffuser optic in order to perform with uniform luminance. This architecture is compared with a downlight designed with a ChromaLit™ remote phosphor light source converting the light emitted by an array of blue LEDs in a reflective mixing chamber. The blue LEDs in each system are controlled to be equivalent and both systems are designed to produce light of 3000K correlated color temperature (CCT) and 80CRI. The light output and luminous efficacy of both systems is compared under room temperature conditions with elevated system temperature during steady state operation.
Design Guide for Seven Segment Displays
Agilent Technologies offers a full range of LED (Light Emitting Diode) display products that meet a variety of designer needs. The product offering of seven-segment displays ranges from low cost, standard brightness displays to high ambient light displays that produce up to 7.5 mcd per segment.
Behaviour of InGaN LEDs in Parallel Circuits
Some year s ago, the color range of Light Emitting Diodes ( L EDs) on the market was limited to the red to green spectrum. Then, blue LEDs were developed and introduced into the market . These blue devices made it possible to build so called " single- chip white " LEDs, using a yellow converter material in combination with a blue die. Most of the blue and white LEDs use Indium Gallium Nitrite (InGaN) as an epitaxial layer.
Getting to Know LEDs, Applications and Solutions
Light-Emitting Diodes (LEDs) are a reliable means of indication compared to light sources such as incandescent and neon lamps. LEDs are solid-state devices requiring little power and generating little heat
Page 1 2
