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Photonics Spectra - October 1998
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Issue Library
Features
Remote Sensing Guides Farmers to Increased Profits
The US Department of Agriculture estimates the value of field crops, fruits and nuts, and commercial vegetables produced on the 2 million farms across the US at more than $87 billion a year. Although...
Photonics Analyzes Food Quickly, Efficiently
You are what you eat. Perhaps food analysts have that old adage in mind when they carefully examine the content of their products. What consumer, after all, wants to be a croissant with poorly...
Laser Analysis:
Valid information about the performance of a laser is the foundation for its proper use. As the variety of commercial lasers increases, users need a greater overall understanding of how to measure...
Rules of Thumb:
Scientists, engineers and product developers face daily phone calls and hallway visits from peers who want quick answers to complex questions: "If I improve X, how will it affect Y and Z?" We tend to...
Laser Safety:
Injuries from lasers are nothing new. Every year since the laser's invention more than 30 years ago, laser technicians, research assistants, seasoned laser engineers and Ph.D. physicists get hurt...
Photonic Eyes Separate the Wheat from the Chaff
Sophisticated machine vision systems, used in industry for a variety of tasks from wafer sorting to component-defect detection, are making inroads into agricultural and food processing applications...
Tech Pulse
Lens Array Increases Photodetection Efficiency
A two-lens array developed by physicists contributing to the HERA-B detector facility at the Deutsches Elektronen-Synchrotron facility shows that some of the most advanced experimentation in pure...
Lenses Boost Solar Cells' Power
Two solar concentrator arrays will supply Deep Space 1's power-hungry propulsion system with more than 2 kW at the beginning of the mission. The solar concentrator arrays with refractive linear...
Low-Cost Quantum Cascade Laser Nears Reality
A team of researchers has designed a quantum cascade laser using one of the most common low-cost semiconductor compounds in the world: gallium arsenide (GaAs). The advance could prove important in...
Tiny Transistors Fit on New Chip
Researchers at Texas Instruments in Dallas have developed transistors with a channel length of 0.07 µm -- so small that 400 million can fit on a single chip. The new technology could draw...
Kopin and Motorola Sponsor Design Contest
Kopin Corp. of Taunton, Mass., and Motorola Inc., based in Hong Kong, have issued a challenge to engineers, designers and students: Design a portable commercial product that incorporates Kopin's...
Device Detects Particles in Gas Flow
The combination of a laser and time-of-flight mass spectrometry promises to enable semiconductor manufacturers to measure the size and type of individual particles in a vacuum chamber during the...
Holographic Storage Takes a Step Toward Viability
If holographic storage is ever going to make it out of the lab and really compete with existing data storage techniques, researchers must come up with practical, cost-effective solutions to some of...
Mirror Enables 3-D Lithography
Ball Semiconductor Inc. has set its sights on revolutionizing the computer-chip industry by manufacturing a spherical chip. To accomplish this, it has incorporated a multifaceted mirror into its...
Eye-on-a-Chip Seeks to Mimic Human Vision
Scientists are looking to improve on one of nature's wonders -- the human eye. Researchers at the University of Michigan are leading a multiuniversity effort to design a microchip eye that could...
Integrated Components Trim NASA Budgets
Space exploration at the beginning of the next century will balance tight budgetary constraints against the need to understand our planetary environment. New technologies introduced in NASA's New...
New Option Emerges for Optical Networks
For the past few years, the news in telecommunications circles has been wavelength division multiplexing. Now Commercial Technologies Corp. in Richardson, Texas, hopes to add a new catchphrase to the...
Our Bodies, Our Photons
The thermal effects of microwave radiation on living tissue are well-documented and strictly regulated. However, researchers are drawing attention to the fact that microwave radiation, even in...
Scientists Fabricate Plastics with Nonlinear Properties
Although researchers have successfully designed optical-quality plastics, the nonlinear optical properties of plastic tend to fade over time. Therefore, many researchers have dismissed plastics as...
Lasers Are Used to Screen Solid-State Catalysts
Scientists looking for solid-state catalysts that are important to the chemical and oil industries have relied on trial-and-error processes because catalytic activity is difficult to screen. Unlike...
Feds Postpone Laser Safety Tests
The delayed delivery of a laser has held up evaluations of the US Federal Aviation Administration's guidelines for laser exposure within 10 nautical miles of an airport. The tests, which were...
Luminous-Intensity Standard Set for Traffic Lights
The International Commission on Illumination in Vienna, Austria, recently reviewed requirements for the luminous intensity of road traffic signals. It undertook a major review of its recommendations...
Scientists Unveil High-Power Mid-IR Laser
Commercially available lasers based on semiconductor compounds such as PbSn have proved suitable for applications requiring wavelengths in the mid-IR range. The only problem with these lasers is that...
Researchers Advance VCSEL Technology
In the quest to develop long-wavelength vertical cavity surface-emitting lasers (VCSELs), scientists have faced two large barriers: temperature performance and operating voltage. W.L. Gore &...
BrainTech and UTMC to Develop Vision Recognition Board
BrainTech Inc., based in Vancouver, British Columbia, Canada, and UTMC Microelectronic Systems Inc., a business unit of Hamilton Standard, have agreed to develop and manufacture a visual recognition...
Fiber Increases Bandwidth in WDM Amplifiers
There has been one major problem with conventional erbium-doped fiber optic amplifiers. Because of certain characteristics of erbium-doped fiber, dense wavelength division multiplexing (WDM) systems...
light speed
Excel Technology Buys CO2 Laser-Maker Synrad
Pursuing a strategy to strengthen its laser products line, Excel Technology Inc. recently acquired Synrad Inc. of Mukilteo, Wash., a maker of sealed, all-metal CO2 lasers, for about $22 million. Wall...
DRS Technologies Buys Raytheon Divestitures
DRS Technologies Inc. recently announced an agreement to purchase portions of Raytheon's ground electro-optical systems and focal plane array businesses, which formerly were parts of Hughes Aircraft...
Get Ready for the Euro
On Jan. 1, 1999, European business will wake up to the euro, the single currency devised to take the place of national currencies in 11 countries involved in European monetary union. The good news is...
Process Analytical Instrumentation Markets Continue Growth
According to a recent report compiled by Frost & Sullivan of Mountain View, Calif., the market for process analytical instrumentation will continue to grow at a moderate pace between 1998 and...
AlliedSignal Attempts Hostile Takeover of Amp
Amp Inc., a manufacturer of fiber optic connectors based in Harrisburg, Pa., has rejected a $9.8 billion takeover attempt by AlliedSignal Inc. of Morris Township, N.J. Despite the rejection,...
Competitors Join Forces for Airborne Laser
When it comes to matters of national defense, even the fiercest competitors can put aside their differences. Heraeus Amersil Inc. of Duluth, Ga., and Corning Inc. in Corning, N.Y., manufactured a...
Electric Lightwave to Create Western US SONET Ring
Electric Lightwave Inc. of Vancouver, Wash., announced that it would implement what it calls the largest ringed SONET network in the Western US. The company's 3000-mile SONET ring is slated for...
II-VI Inc. Wins Verdict Against Consultant
II-VI Inc. of Saxonburg, Pa., a producer of materials for optical, IR and nuclear radiation detectors, has won its lawsuit against a former consultant. A jury found that Emmanuil Raiskin had...
Accent on Applications
Airborne Multispectral Radiometer Images Fire and Ice
It is difficult enough to prevent and detect wildfires, but even after one has been spotted, its potency and path are unpredictable. Now a device that could map these erratic fires is being developed, based on the two most common technologies that have been used for this purpose. Snow-capped Telegraph Peak, near Los Angeles, appears yellow-green in the background of the infrared image. From...
Digital Cameras Improve Surveillance in Port of Houston
On a busy day, nearly 400 large vessels -- ships and tows -- navigate through the port of Houston. Until recently, the US Coast Guard's Vessel Traffic Service had used a system of analog video...
Infrared Laser Examines Mudslides
Mudslides cause millions of dollars of damage and kill hundreds of people every year. Unlike other natural phenomena such as hurricanes or even earthquakes, mudslides are more challenging to predict;...
Presstime Bulletin
Researchers Reveal High-Resolution Images of Black Hole
Scientists may be a little closer to understanding black holes, thanks in part to an imaging technique called IR speckle interferometry. Pioneered by Andrea Ghez of the University of California in...
Telecom Consortium Signs $1.5 Billion Cable Project
More than 50 telecom companies signed a contract to provide a fiber optic cable link between Europe and the US for $1.5 billion. The link will help decrease waiting time on the World Wide Web. The...
After Weeks of Speculation, Ciena-Tellabs Merger Is Canceled
Ciena Corp. and Tellabs Inc. have canceled plans to merge. Directors of both companies said they would not be able to gain approval for the merger from shareholders. Originally, Lisle, Ill.-based...
Power Spectra Halts Operations
Citing a lack of operating capital, Power Spectra Inc. suspended operations Aug. 27. The company laid off all its employees. Located in Sunnyvale, Calif., the company designed and manufactured...
Robotic Vision Systems Announces Layoffs
Robotic Vision Systems Inc., a manufacturer of automated 3-D machine vision systems, has reduced its worldwide work force by 140. The layoffs reflect the company's goal of reducing expenses in a...
Mexican Volcano Sends out Plumes
Since 1994, the Popocatepetl volcano has intermittently shown signs of life. After a few months of relative calm, the volcano has again begun sputtering plumes of steam and gas. Full eruption such as...
Products
FIBER FUSION SPLICER
The Aurora Instruments Inc. Fusion 3500 fiber optic fusion splicer combines profile alignment system and local injection/detection technology in a compact unit. In profile alignment mode it detects fiber end defects and makes low-loss splices and estimates splice loss in about 14 s. In injection/detection mode it achieves lower splice losses and more accurate estimates. The device provides two...
Aurora Biomed Inc.
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FIBER TESTING
Fiber Instrument Sales Inc. has introduced its Universal Continuity Tester, which accepts ST, FC and SC connector styles. The user simply inserts the connector into the universal adapter and operates...
Fiber Instrument Sales Inc.
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CCD CAMERA SYSTEMS
Catalina Scientific Corp. is offering backside-illuminated CCD camera systems designed for low-light-level imaging spectroscopy. The KestrelSpec series features broad spectral response with 80%...
Catalina Scientific Instruments LLC
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DEFECT CLASSIFICATION
A machine vision software tool from Cognex is designed to overcome the limits of today's inspection methods. Called PatInspect, it is based on the company's PatMax technology, which enables the...
Cognex Corp.
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CONFOCAL MICROSCOPE
The Optiphot 200C from Nikon is a confocal microscope system for integrated circuit production and inspection. It uses confocal, bright- and dark-field, differential interference contrast and...
Nikon Instruments Inc.
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POWER SUPPLY
Analog Modules Inc. has increased its line of flashlamp simmer supplies with the model 864. With a power rating of 60 W, the 864 has an adjustable open circuit voltage of up to 1500 V to initiate...
Analog Modules Inc.
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X-RAY SOURCES
Hamamatsu Corp.'s two x-ray sources, the L6731-01 and the L6622-01, are ruggedly built to withstand industrial environments. They are suited for a variety of industrial inspection and testing...
Hamamatsu Corporation
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DEEP-UV LASER
Light Age Inc. has unveiled the Pal/Pro-UV, a versatile, all-solid-state deep-UV laser that produces ultranarrow spectral bandwidths at 193 and 248 nm and is tunable to other wavelengths. The laser...
Light Age Inc.
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LASER DIODE DRIVER
Newport Corp.'s model 5600 high-power laser diode driver operates in either CW or quasi-CW mode. Providing up to 65 A of output, the device can drive multiple high-power laser diode bars in series....
MKS/Newport
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LASER FOCUSING LENSES
High-speed f/2 diffractive laser focusing lenses are available from OptoSigma Corp. They achieve near-diffraction-limited performance via diffractive and refractive surfaces and have l/4 wavefront at...
OptoSigma Corp.
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NIR LASER DIODES
A range of vertical-cavity surface-emitting lasers (VCSELs), called the Specdilas V-series, is available from Laser Components GmbH. The lasers emit perpendicular to their PN junction, and feature...
Laser Components Germany GmbH
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COMPUTER-CONTROLLED OPO
Continuum has enhanced its Surelite optical parametric oscillator (OPO) with computer-control capability. The broadband tunable device, called the SLOPO-PC, runs under the Windows operating system....
Amplitude Laser Inc.
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CO2 LASER OPTICS
Laser Research Optics is offering a complete line of CO2 laser beam delivery optics. Optimized for 10.6-µm laser radiation where depth of field is important, these optics are available in a wide...
Laser Research Optics
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AUTOMATED DEEP-UV INSPECTION SYSTEM
The 300-mm Axiospect 300 from Carl Zeiss Inc. is designed for the inspection and defect analysis of 0.13-µm and higher geometries. Its new optical system offers deep-UV imaging as a basic capability....
Carl Zeiss Microscopy LLC
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FILM METROLOGY
A transparent film metrology system from Rudolph Technologies Inc., called the SpectraLaser UTF, provides guaranteed subangstrom thickness accuracy of ±0.5 A and tool-to-tool matching of ±0.1 A. The...
Rudolph Technologies Inc.
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PARTICLE ANALYSIS
The SALD 201V particle-size analyzer from Shimadzu Scientific Instruments Inc. features a measuring range of 0.4 to 200 µl. It is a compact, portable instrument for food, liquid, cosmetic and...
Shimadzu Scientific Instruments Inc.
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SIGNAL GENERATOR
Berkeley Nucleonics Corp. is offering a DC- to 20-MHz benchtop function and arbitrary waveform generator, the BNC model 625A SmartARB, with signal processing and analysis functions. It provides the...
Berkeley Nucleonics Corporation
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IR THERMOMETER
The Series 3000.4GX high-speed infrared temperature transducers from Everest Interscience Inc. have a response time of 20 ms and a turn-on time of 10 ms. These small infrared thermometers give...
Everest Interscience Inc.
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CALIBRATION TOOL
ILX Lightwave Corp. has introduced a rugged and portable calibrator for optical spectrum analyzers. The model FCS-8812 supplies over 50 crisp acetylene absorption lines near the 1550-nm...
Newport - ILX Lightwave, Photonics
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