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Industrial Features
Light Creates Tiny Patterns
The old trick, practiced by schoolboys everywhere, of concentrating a beam of sunlight through a magnifying lens to ignite paper -- or an unfortunate ant -- has been given a new twist. By using a microscopic plastic bead in place of the lens and light from a powerful laser instead of the sun, engineers were able burn ultrasmall patterns onto a blank microchip. The technique, which creates lines and dots that are 1000 times narrower than a human hair, could be used to create the tiny...
Photonics.com, June 2008
Building Better Solar Cells with Cameras
As a result of the world’s climate situation and the rising cost of fuel, “clean” methods of energy generation are drawing considerable interest. The result has been a significant boom in solar cell manufacturing over the past few years. Solar...
Photonics Spectra, June 2008
Controlled Growth of ZnO Microcrystals Achieved
Although ZnO-based microcrystals hold promise in a number of applications, current fabrication techniques are hampered by problems that have limited their effectiveness and their appeal. Fabrication, for instance, has been held back by a shortage...
Photonics Spectra, June 2008
Dual-Line CMOS Image Sensors Accelerate Postal Sorting
With faster innovation cycles, shorter times to market and higher investment costs, the pressure for more automation and higher production output is escalating in nearly all industries. In industrial applications, the demand for faster...
Photonics Spectra, June 2008
For a Real Close-up, a Little Light
Researchers from the University of Texas at Austin have shed new light on near-field scanning optical microscopy. Incorporating a nanometer-scale LED in the probe tip of an atomic force microscope, they acquired optical and topographic images of a...
Photonics Spectra, June 2008
Hybrid Solar Lighting
Hybrid solar lighting systems focus highly concentrated sunlight into a fiber optic bundle to provide sunlight in rooms without windows or conventional skylights. The flexible sunlight bundles are easily routed through small openings and around...
Photonics Spectra, June 2008
Organic Photovoltaics
Photovoltaics based on crystalline silicon dominate the commercial solar energy industry; however, because solar energy is competing with energy sources such as gas and coal, the quest for new photovoltaic materials has expanded. Any new energy...
Photonics Spectra, June 2008
Photovoltaic Technologies
In the 1950s, scientists at Bell Labs serendipitously discovered that silicon doped with certain “impurities” is very sensitive to light. This discovery arrived just in time for the Space Age, when a source of electricity was needed for satellites...
Photonics Spectra, June 2008
Photovoltaic Test Performance
The sun’s energy is abundant, and turning it into electrical power is not only good for the environment but also good business. In 2007, solar modules capable of producing approximately 3700 MW of energy were manufactured, resulting in about $30...
Photonics Spectra, June 2008
Precise Positional Adjustments with Laser-Induced Shock Waves
The trend in manufacturing today is to make everything smaller. Electronic gadgets, mechanical devices — everything is shrinking. Examples that come to mind are tiny microelectromechanical systems accelerometers built into automotive seat belts,...
Photonics Spectra, June 2008
Quality Down to the Last Detail
Today’s automobile manufacturing plants bear little resemblance to those in use less than a generation ago. Assembly robots now adapt the position of car body parts to each other before fitting, taking into account geometry variations of each piece...
Photonics Spectra, June 2008
Quantum Dots Created from Carbon Nanotubes
Carbon nanotubes are proving useful for sensing applications because they produce a strong Raman signal and make a detectable sound when hit with a laser. Nanotubes fluoresce as well, but not brightly. However, researchers have discovered that...
Photonics Spectra, June 2008
Socks with Nanosilver Could Present Problems
The saying “It all comes out in the wash” could take on a whole new meaning as nanoparticles become more common in consumer goods. Using scanning and transmission electron microscopy, Troy M. Benn and Paul K. Westerhoff of Arizona State University...
Photonics Spectra, June 2008
Strategically Placed Cameras Track Pharmaceuticals
Manufacturing of pharmaceuticals is an important and evolving industry. With the advent of globalization and the influx of counterfeit products, the development of new technologies such as e-pedigrees (secure files that store data about each move a...
Photonics Spectra, June 2008
Through a Lens, Wetly
If you want a variable lens in the future, you may have to get wet. That is the hope of several researchers and companies that are working on liquid lenses, devices that use water or another liquid as an optical element. These systems employ a...
Photonics Spectra, June 2008
Array of Tiny Quantum Cascade Lasers Provides Tunable Mid-IR Output
Unlike the near-infrared and visible spectral ranges, where diode lasers provide compact and reliable sources, the mid-infrared range — 3 to 15 μm — lacks good lasers. A breakthrough in this area occurred with the demonstration of the quantum...
Photonics Spectra, May 2008
Cavity Leak-Out Spectroscopy Aids Ethane Detection
Ethane is an important chemical that is used in several industrial processes, such as the manufacturing of ethylene, but it also is an important biomarker for human health. Trace amounts of the odorless gas are created as a by-product of oxidative...
Photonics Spectra, May 2008
Economic Challenges for Machine Vision
If you produce it, will customers buy it? As with other firms, machine vision companies are wondering how the products they manufacture will sell in the current economy. The concern is well justified; although machine vision products historically...
Photonics Spectra, May 2008
Focusing High-Power, Single-Mode Laser Beams
New generations of thin-disk and fiber lasers are combining excellent beam quality — M2 typically between 1.2 and ∼8 — with kilowatts output power. This combination brings the performance of beam-forming optics into question.1, 2 In...
Photonics Spectra, May 2008
Leaves Its Print on Surveillance
For better or worse, security is increasing, and that means new opportunities — and challenges — for machine vision. Cameras and systems developed originally for inspecting widgets now are being pressed into service for surveillance and for...
Photonics Spectra, May 2008
Visible and Nonvisible Imaging Techniques
The field of industrial microscopy has evolved from simple bright-field on-axis imaging to that of nonvisible and confocal-based technologies. Bright-field is a resolution-limited technique that uses on-axis illumination and imaging to form the...
Photonics Spectra, May 2008
Buildings Painted with Solar Cells Envisioned
SWANSEA, UK Researchers at Swansea University are investigating ways of painting solar cells onto the flexible steel surfaces that are used for cladding buildings. An ecological alternative, this photovoltaic method of capturing solar energy...
Photonics.com, May 2008
Laser Beams Aren’t the Only Hazards in the Laboratory
The ANSI Z136.1 standard has a sizable section about non-beam hazards in the photonics laboratory. What it tells us is that tunnel vision can be dangerous. If we’re focused only on hazards associated with laser beams, we leave ourselves open to a...
Photonics Spectra, April 2008
Lasers Support Emerging Solar Industry Needs
Despite its multibillion-dollar size, the solar industry exhibits many characteristics of an emerging sector in terms of manufacturing and product standardization. Indeed, rapid growth in solar cell manufacturing coupled with an extended period of...
Photonics Spectra, April 2008
Sunlight, Dyes and Inexpensive Semiconductors
In recent decades, the photovoltaic market has experienced tremendous growth — about 20 to 25 percent per year. The growth occurred because of the pressing need to establish renewable energy around the world and because photovoltaic technology was...
Photonics Spectra, April 2008
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