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Adaptive Optics in Biological Imaging with Two-Photon Microscopy
Cutting-edge biological microscopy has enabled researchers to explore tissue at the subcellular level in vivo. Having the ability to observe physiological processes in vivo has led to breakthroughs in our understanding of cancer, eye disease and brain disorders and is paving the way for earlier diagnoses and more effective treatment. Until recently, biological imaging devices have had resolution limitations that restrict the ability of researchers and clinicians to detect critical detail in...
Photonics Spectra, December 2009
Calibrating the Thermal Camera
Thermal imaging, once the domain of the defense sector, is finding applications in a number of commercial and medical fields. As more manufacturers join the thermal camera business, the need to test these devices to recognized standards is becoming...
Photonics Spectra, December 2009
Photonics Is Heating Up in India
India is the seventh-largest country by geographical area and the second-most populous in the world. With approximately 1.17 billion people, it is second only to China, which has 1.34 billion. Situated in south Asia, between Pakistan, China and...
Photonics Spectra, December 2009
Sniffing out threats with light
It isn’t time to retire bomb-sniffing dogs – yet. However, that scenario is closer to happening, thanks to advances in surface-enhanced Raman spectroscopy, hyperspectral imaging and other photonics technologies. Armed with these, police and military...
Photonics Spectra, December 2009
Uncooled infrared detectors
Infrared camera manufacturers can choose from a wide variety of uncooled IR detectors to make different model designs for a variety of commercial, industrial and military products. Uncooled infrared detectors have seen many significant technology...
Photonics Spectra, December 2009
Under an Unblinking Eye
Used for displays in all manner of electronic gadgets, LCD panels are a mainstay of everyday life. Dozens of manufacturers – mainly in China, Taiwan, Japan and South Korea – produce a seemingly endless stream of these liquid crystal...
Photonics Spectra, December 2009
Finding peak performance under the cover of darkness
Whether in a helicopter or fixed-wing aircraft, or whether hunting for insurgents in Afghanistan or lost children on a mountain slope near Denver, pilots of all stripes are putting in more hours than ever after the sun sets. Night-vision goggles, or...
Photonics Spectra, November 2009
For Lidar, Many Happy Returns
For light detection and ranging (lidar) scanners, the returns are in – and they’re good. Innovations have made lidar scanners, which emit laser pulses and capture the returning light to determine distance to an object or characteristics of air,...
Photonics Spectra, November 2009
Getting VC Funding: Improving Your Odds
There is no shortage of good advice on how to get venture capitalists (VCs) to invest in your start-up company. Out of curiosity, I Googled “get VC funding” and found almost 2 million links. One top site is an informative short video by Paul...
Photonics Spectra, November 2009
LEDs: Beyond High Brightness
The US Department of Energy’s Energy Information Administration (EIA) reported in 2007 that the US had used roughly 526 billion kilowatt-hours of electricity for lighting (both commercial and residential). In 2008, the EIA reported that a typical...
Photonics Spectra, November 2009
Megawatt Laser Power at Sea
A solitary US naval warship is at sea when a fleet of ships surrounds it armed with hypervelocity cruise missiles and electromagnetic rail guns. Although it may be outnumbered, the warship has something the other ships don’t – an ultraprecise,...
Photonics Spectra, November 2009
Micro Video Lenses Grow Up
A few years ago, micro video lenses were used in machine vision almost exclusively for limited-space and low-resolution applications. But the ongoing reductions in size and cost of optical sensors, along with increases in pixel count, are allowing...
Photonics Spectra, November 2009
Optics in Space
The origins of free-space optical communications can be traced back to the late 19th century, with the introduction of Alexander Graham Bell’s “photophone” and the optical telegraph. Both of these technologies went the way of the daguerreotype, but...
Photonics Spectra, November 2009
Picosecond Lasers for High-Quality Industrial Micromachining
Just as CW and quasi-CW lasers have revolutionized the materials processing world, picosecond lasers are poised to change the world of micromachining. The use of picosecond lasers in micromachining was ushered in more than three decades ago because...
Photonics Spectra, November 2009
The UK Fights Back
The UK economy has had a tough slog in the past year and a half. At the end of September, the government reported that the gross domestic product shrank by 0.6% in the April to June period, marking five consecutive quarters of contraction. The 5.7%...
Photonics Spectra, November 2009
Imaging: The big picture
The image sensor market has enjoyed phenomenal growth in recent years. According to market analyst Tom Hausken of Strategies Unlimited in Mountain View, Calif., it reached $7.2 billion in 2008 after several years of strong double-digit growth. But...
Photonics.com, October 2009
A closer look at plastic solar cells
Plastic solar cells are lightweight, flexible and, most importantly, cheap to make. But so far, these devices lack one thing: efficiency. Now researchers at the University of Washington in Seattle believe that they may have the key to unlocking...
Photonics Spectra, October 2009
A New World of Fiber Sensors
Optical fiber is well-known for its ability to carry information at high speeds over long distances. Twenty years after the first transatlantic fiber optic cable was laid, these strands of ultrapure glass continue to offer unrivaled bandwidths. They...
Photonics Spectra, October 2009
Getting a foot in the door: The role of photonics in modern security systems
In times past, a guard might demand someone entering his domain to “halt and be identified.” Today that job is increasingly done by security ID systems using a variety of techniques, including photonic ones such as lasers, optical media and optic...
Photonics Spectra, October 2009
Instant Revenue: Marketing and Mergers
Given the current state of the economy, any practical discussion of marketing and business development should focus on revenue generation, here and now. What can photonics companies do right away to increase their bottom lines? It is wise to...
Photonics Spectra, October 2009
Lasers in solar cell production
Photovoltaic (PV) solar cells have been around for more than 50 years now, enjoying initial commercial success in familiar applications such as powering satellites in space and, later on, digital calculators and other portable devices. Since the...
Photonics Spectra, October 2009
Taking Semiconductor Manufacturing to the Extreme
As consumer and enterprise demand for faster computers increases, so will the demand for faster computer chips. The speed of computer chips is directly related to the number of transistors that can fit on a chip. Transistors work like switches...
Photonics Spectra, October 2009
The Photonics Industry Shines in France
“With more than 400 manufacturers of cutting-edge photonics technologies and a solid R&D base, French [photonics] companies have continuously delivered innovative new products that have ensured their strategic position in the global market,”...
Photonics Spectra, October 2009
The road to solar cell supremacy
The silicon traditionally used to make solar panels is costly and inefficient at converting sunlight into electricity, experts say, yet it remains the material most commonly used to make solar panels. “This sounds rather ugly, but silicon is the...
Photonics Spectra, October 2009
The Search for Other Earths
In recent years, astronomers have discovered more than 350 extrasolar planets, or exoplanets. But typical detection techniques are best suited for finding planets that are very dissimilar to Earth in terms of size and orbital characteristics, and it...
Photonics Spectra, October 2009
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