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For LEDs, Maybe size Does Matter
In the lighting and display product markets, the buzz has been about LEDs, which have experienced dramatic changes in the past several years and which continue to push aggressively forward. The hot topic is organic LEDs (OLEDs) and their promise to deliver improvements for both lighting and display. In the past year, the first products have made their way into retail outlets to generally favorable reviews. One of the highest-profile OLED product announcements was Sony’s XEL-1, an 11-in....
Photonics Spectra, November 2008
Helping LEDs Keep Their Cool
In the general illumination market, LEDs are winning acceptance and experiencing phenomenal growth. However, despite the enthusiasm, there still are significant barriers to their widespread use in other potentially hot markets. As designers...
Photonics Spectra, November 2008
Hoping for a sunny day?
It seems like renewable sources of energy – and solar technology in particular – are rapidly gaining attention and momentum. Driven by rising energy prices, but equally by favourable tax breaks in a number of European countries, solar cells and...
Photonics.com, November 2008
Light Armor Keeps Workers Safe from Harm
The factory floor hums with human and mechanical activity. Industrial robots weld steel, conveyors move parts, cameras scan inventory, and lasers mark pieces prior to assembly into a final product. Trays of parts feed into the processing floor, and...
Photonics Spectra, November 2008
O Stars in the Firmament, Release Your Secrets
Nearly 400 years ago, Galileo Galilei kicked the development of optical telescopes into high gear. Since then, there has been a steady stream of progress both in the technology behind what Galileo first termed the “perspicillum” and in our knowledge...
Photonics Spectra, November 2008
Optics Make Lasers Safer in the Long Run
Originally characterized as a solution in search of a problem, lasers now are the answer to a host of problems. Two recent examples show just how laser optics enable new applications. One promises to make a common safety tool – the light barrier –...
Photonics Spectra, November 2008
The Great White Organic Hope
The world is coming to the realization that solid-state lighting offers the promise of a green energy-saving technology. And poised to fulfill that promise are white organic LEDs (OLEDs) that offer exciting new illumination forms and...
Photonics Spectra, November 2008
The Silicon-Sapphire Breakup
Traditionally, LEDs are fabricated by growing heterostructures on either sapphire or silicon carbide substrates, but each of these has its own set of problems. Sapphire provides a poor lattice match and low thermal conductivity, silicon carbide is...
Photonics Spectra, November 2008
Brave New Virtual World: Second Life
Avatar-inhabited online worlds such as Second Life (SL) could be the next new wave of the Internet. Science-related organizations and companies, along with a number of academic institutions, already have begun establishing residency in these digital...
Photonics Spectra, October 2008
CHECK POINT
On Sept. 21, 2007 – just six years and 10 days after two planes took off from Boston’s Logan International Airport and rammed into the World Trade Center in New York – MIT undergraduate Star Simpson entered the very same airport wearing some LED...
Photonics Spectra, October 2008
Concentrating the Sun
Researchers worldwide are looking for the combination that will unlock the door to more efficient solar energy. A variety of approaches are being tested that, hopefully, will raise efficiencies to a level that will bring solar to parity with...
Photonics Spectra, October 2008
Displays That Look Back
Digital signage is nothing new. Whether in New York City’s Times Square or along the highway, digital signs enable more than one advertisement to appear in a given location, and the quick changes of the display often catch the attention of...
Photonics Spectra, October 2008
Faster, Stronger, Higher:
Lighting, specialized optics and other technologies that can be labeled “protophotonics” were being used in sporting contests long before night games were played at Wrigley Field, but bright lights and television cameras have become old standbys,...
Photonics Spectra, October 2008
Helium: Up, Up and Away?
Refiners are struggling to keep up with demand, prices have increased dramatically over the past few years, and debate is raging over depleting federal reserves. If you think the subject is oil, think again. Helium, the most important supercoolant...
Photonics Spectra, October 2008
How to Do Business in France
What do companies such as Intel, Colgate-Palmolive and Toyota have in common? They have all chosen France as the location for their European headquarters. Company directors consistently rank France as one of the top locations for setting up or...
Photonics.com, November 2008
In the Spirit of Managing the Planet
Gathering satellite images of Earth is nothing new. Nor is using the information to analyze our continents, oceans and weather-related events for environmental, strategic and reconnaissance purposes. What seems to be changing is the way in which...
Photonics Spectra, October 2008
Inspection in the Fast Lane
In a security-conscious age, there is a world of information to keep tabs on. Walk into an airport or a federal building, and you are screened for forbidden objects. If you run a small retail shop and are busy in the back room, knowing when a...
Photonics Spectra, October 2008
Interacting with the Whole Earth
Researchers at Microsoft Corp. recently revealed a device that allows users to interact with an image, such as a globe, projected onto a sphere. To create the prototype display, the researchers started with a commercially available globe projection...
Photonics Spectra, October 2008
Mining the Moon with Solar
If NASA has its way, Solar energy and fiber optics will combine to power a high-temperature furnace that mines oxygen on the moon. A manned lunar base will require a substantial supply of oxygen, both for life support and for propellants, and rather...
Photonics Spectra, October 2008
Optical Thin-Film Coating Methods
Chances are that this magazine comes off a press that uses components with thin-film coatings. What’s more, your supermarket checkout scanners, cell phones, cars and TVs all utilize thin-film coatings. Despite the wide range of applications, there...
Photonics Spectra, October 2008
Pocket-Size Roll-Up Displays
Displays are becoming tiny, but the smaller they get, the harder it is to see a lot of information at once. Although devices such as the iPhone include ways to zoom in on information in an e-mail or on a Web page, this gets tiring if you’re trying...
Photonics Spectra, October 2008
Researchers Who Turn into Entrepreneurs
Interviewed four people who have founded companies based on new photonics technologies developed in their research. They range in age from 34 to 49, and their companies have spun out from universities in England, Scotland and Ireland, although one...
Photonics.com, November 2008
Soda Can Videos
You’ve just finished drinking your favorite soda, but before you recycle the can, imagine that it has a button allowing you to view a music video. Researchers led by Dr. Roel Vertegaal at Queens University in Kingston, Ontario, Canada, have designed...
Photonics Spectra, October 2008
Spectroscopy Hunts Down Counterfeit Drugs
Consumers are using the Internet to buy prescription drugs more cheaply, sometimes without a prescription, but they may get more than they bargained for because some unscrupulous retailers provide fake or adulterated drugs. The problem has been...
Photonics Spectra, October 2008
Taking Solar to the Extreme
When polar explorer Robert Swan – the first person to walk to both the North and South Poles – returned from his most recent expedition to Antarctica in March 2008, he brought back proof that solar technology is entering a new era. Swan had...
Photonics Spectra, October 2008
(2,924 results found)

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