Features | Photonics Spectra

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Features

Clothing manufacturers have long recognized that a completely automatic measuring system could revolutionize the apparel industry. Not only could a consumer be sure that mail-order clothing would fit, but he or she could also view a digital representation of how they would look when wearing a particular garment.However, digital measuring systems have been too expensive for general use, partly because it is difficult to provide accuracy across the wide range of possible human shapes. Recently,...

Photonics Spectra, May 1997

Quake Alert:

At 5:45 p.m. on January 17, 1995, school children busily jumped rope and played hide and seek near their homes in Kobe, Japan. Mothers handled the business of the home and fathers put the finishing touches on another workday. At 5:46, the ground...

Photonics Spectra, May 1997

Quantum Dots

The techniques used to manufacture computer chips have created a wealth of optoelectronic devices with remarkable features. These heterostructures (sandwiches created by alternating layers of two materials with different conductive properties) owe...

Photonics Spectra, May 1997

Adaptive Optics Aim for Earthly Applications

Large Earth-based telescopes use adaptive optics to measure and compensate for rapidly fluctuating wavefront distortions that blur the images of objects viewed through the turbulent atmosphere. Compensation for turbulence is important in many other...

Photonics Spectra, April 1997

Fiber Optic Gyros Put a New Spin on Navigation

Aircraft, spacecraft and ships have long benefitted from using gyroscopes to help them navigate, and recently advances in photonic gyroscopes have brought this technology into the mainstream. These improved gyroscopes -- based on fiber optic...

Photonics Spectra, April 1997

Laser Radar Watches the Friendly Skies

Rain, fog, high winds and snow are notorious for ruining air travel schedules. Not only do these conditions inhibit the smooth (and tightly scheduled) flow of aircraft, but they add to the air traffic controller’s burden. Laser radar research under...

Photonics Spectra, April 1997

Photonics in Transportation

Since the 1980s, the world’s burgeoning population has forced many governments to realize that they must build more efficient transportation systems or fail to meet the needs of a modern citizenry. The problem is simply defined: you can only cram so...

Photonics Spectra, April 1997

Stereo Displays Add A New Dimension to Work

If commercially available stereoscopic displays could work without special glasses and be viewed from virtually any angle, by any number of people at once, we would probably view all three-dimensional data stereoscopically. Alas, such a technology...

Photonics Spectra, April 1997

Applications The Key to Imager Choice

Unless you know the questions to ask, selecting the right imaging technology for your applications can seem more of a coin toss than an educated choice -- an outright nightmare for those uninitiated in the intracacies of solid-state imaging...

Photonics Spectra, March 1997

Artificial Nose Knows Chemical Odors

The vertebrate olfactory system is well-known for its extraordinary sensitivity and broad selectivity. Tufts University researchers have incorporated this array format into the design of a broadband optical vapor sensor.

Photonics Spectra, March 1997

Diode Lasers Sing Spectroscopy's Tune

Environmental issues such as global warming, ozone depletion and photochemical air pollution have increased concern about how pollutants affect the environment. This has led to an increased emphasis on detecting pollutants, understanding their...

Photonics Spectra, March 1997

Fiber Biosensors Help Decode Genes

Deciphering the human genome and exploring genetic variation are fueling a biomedical revolution. Diagnosis of inherited disorders and disease at the genetic level relies on the identification and detection of the responsible gene sequences. Optical...

Photonics Spectra, March 1997

Fiber Bundle Grows Microscopy Tools

Near-field optical techniques employ a single nanometer-size aperture that scans across a region of interest. Increasing the number of apertures expands the area that can be scanned at one time. Tufts University researchers have generated thousands...

Photonics Spectra, March 1997

Laser Technique Sniffs Out Pollutants

While many factors can diminish a city's quality of life, one literally takes residents breath away: smog. Traffic, industrial pollution, weather patterns and geography can turn a perfectly lovely city into a very hazy place. Cleaning the air...

Photonics Spectra, March 1997

Laser-Induced Fluorescence Fires Up Engine Research

As the world's sensitivity to environmental pollution increases, it is becoming increasingly important to understanding the overall nature of combustion. They key to this knowledge is precise and detailed measurement of the temperature, distribution...

Photonics Spectra, March 1997

Optical Fibers Make Sense of Chemicals

Optical fibers have revolutionized a variety of fields: They carry images through endoscopes, voices through phone lines, data and video through cable networks, and, more recently, physical and chemical information through sensors. The fiber's...

Photonics Spectra, March 1997

Stay Tuned: Photonic Filters Color Your World

Spectral information enhances our knowledge of astronomy, chemistry, metallurgy, and meteorology, and it contributes to applications in photonics, communications and medical instrumentation. Different specialties may use one of many spectral...

Photonics Spectra, March 1997

3-D Imaging Adds Depth to Science, Industry and Medicine

When most people over 30 think of three-dimensional video, they conjure up memories of wearing silly red/blue glasses to watch even sillier horror movies. Today, three-dimensional imaging is serious business. An impressive array of advances in 3-D...

Photonics Spectra, February 1997

Europe's Telcos Gird for Traffic Onslaught

European telecommunications companies, anticipating the demand for delivery of interactive multimedia services to business and residential customers, are busy planning for tomorrow. On the drawing boards are broadband networks designed for...

Photonics Spectra, February 1997

Fiber-Free Laser Communications Soar to 'Unheard of' Heights

When telecommunications companies first looked for solutions to the overcrowded world of wired, electronic communication, coherent light and fiber optics were there. Fiber optics brought high-bandwidth communications without the electromagnetic...

Photonics Spectra, February 1997

High-Power Diode Lasers Earn a New Image

The growth and development of continuous-wave high-power diode lasers in the last few years has been phenomenal, enabling many advances in a wide range of applications. Diodes’ efficiency, compactness and cost-effectiveness make them an excellent...

Photonics Spectra, February 1997

Integrated Optics: Molding Photonic Components into Solutions

Instrumentation and consumer product designers are enamored of photonics technology. Products containing lasers, LEDs and detectors abound on the shelves of electronics stores, appliance centers and even the corner gas station. Photonics makes new...

Photonics Spectra, February 1997

Spatial Light Modulators Help Machines 'See' Faster

Once, our eyes were all the quality control we needed. But as products became more complex -- containing more, smaller parts -- so did the need for quicker, more efficient inspection techniques. Photonics technology has mirrored the increasing...

Photonics Spectra, February 1997

A Bright Future for Organic Light-Emitting Diodes

Organic materials are part of our everyday life, but only recently have photonic devices begun to exploit their versatility. For more than 20 years it was common knowledge that organic crystals exhibited electroluminescence when large voltages were...

Photonics Spectra, January 1997

All Solid-State Lasers: An Industry Option with Big Potential

Improvements in the size, power, lifetime and ruggedness of solid-state lasers has truly improved their chances in a marketplace that sees a laser as a device and not necessarily a tool. As applications for solid-state devices grow, researchers will...

Photonics Spectra, January 1997

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