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Sensors & Detectors News
Pentagon's Laser Test Fails to Meet Objective
Dec 1, 1997 — When the Pentagon fired a mid-infrared laser at an orbiting US Air Force satellite in October, it failed to accomplish one of the experiment's main objectives: recording the impact. The Defense Department aimed the laser at an infrared camera onboard the satellite 260 miles above the Earth's surface. However, the camera did not transmit images of the strike, because it was receiving instructions at the moment of impact. The camera cannot record images and transmit data at the same time....
Photonics Leads the Way to a Stellar Alignment
Dec 1, 1997 — Stationed on 18-m towers in New York and California, a one-of-a-kind photonic device has played a crucial role aligning eight cylindrical mirrors and the telescope assembly for the Advanced X-ray Astrophysics Facility, NASA's newest space-based...
A Photonics-First Sheds Light on Global Warming
Nov 1, 1997 — GREENBELT, Md. -- A spaceborne photonic combination could help knock some of the guesswork out of studying global warming and its relationship to aircraft. Scientists know that cirrus clouds hold IR radiation in the atmosphere, raising the Earth's...
CCD Dynamic Range: Buyers Need Comparable Specifications
Nov 1, 1997 — The dynamic range of a solid-state image sensor is one of the main characteristics if the device is used in high-end digital still photography. In video applications, the monitor or the human eye averages the noise from picture to picture. In a...
Detector Makes Unearthly Impression
Nov 1, 1997 — The highly touted Mars Pathfinder voyage in August made headlines not just because it afforded the world its first up-close images of the Red Planet, but also because it marked NASA's successful use of inexpensive, commercially available technology....
IR Beamsplitter Coatings Reduce Gas Analyzer Size, Cost
Nov 1, 1997 — A manufacturer of gas-analysis equipment had developed a product that could quickly and accurately measure up to 250 hydrocarbon gases, but it was not without its problems. It was a large, expensive instrument. The company determined that a...
Laser Sensor Controls Mold Level for Aluminum Ingots
Nov 1, 1997 — The Reynolds Metals Co. Alabama Reclamation Operations in Muscle Shoals, Ala., processes aluminum from recycled cans, scrap from canning plants and other sources of new and used aluminum as part of the company's extensive recycling network....
Navy Seeks Photonic Solutions for 2000 and Beyond
Nov 1, 1997 — WASHINGTON -- Photonics will play an important role in information, aviation, networked defenses and other key applications for national defense, according to a National Research Council report. Photonic sensor techniques will be important for...
Optical Fibers Restore Old Records
Nov 1, 1997 — LAUSANNE, Switzerland -- A group of scientists at the Federal Institute of Technology's (EPFL) metrology lab has designed an optical stylus that can play old 78-rpm records that are too fragile or damaged to be played on a traditional record player....
Optical Security:
Nov 1, 1997 — The computer, the boon of the modern age, has leveled the once stratified business world with the delicacy of a velvet-gloved fist. In this new world where information is king and transactional ease a must, risk management has become a balancing act...
Optical Ultrasound Smooths Rough Spots
Nov 1, 1997 — ORSAY, France -- Industries use ultrasound in quality assurance and materials analysis, and a new optical technique may simplify the process for many applications. Noninvasive ultrasound techniques solve problems in the aerospace and automotive...
Photonics Gives New Life to Old Tune
Nov 1, 1997 — BUENA PARK, Calif. -- The player pianos that were so popular in the early part of this century are making a comeback -- this time with a high-tech twist. Although computerized player pianos that store live performances and play them back note for...
Raytheon Acquisition Approved
Nov 1, 1997 — WASHINGTON -- US Justice Department officials have approved Raytheon Co.'s $9.5 billion acquisition of Hughes Electronics Corp. The acquisition makes the Lexington, Mass., company the nation's third-largest defense contractor. The deal went through...
Sensors' New Clothes Enhance Efficiency
Nov 1, 1997 — ALBUQUERQUE, N.M. -- A new coating for chemical sensors promises to increase their sensitivity by a factor of 500. The porous coating, developed at Sandia National Laboratories, is less than 1 µm thick, but its extremely high surface area makes...
Silica Fiber Monitors Temperature in Oil Wells
Nov 1, 1997 — The fuel industry has traditionally used submersible electric pumps to deliver oil from underground reservoirs to ground level. These devices are affected by changes in temperature and pressure, which can slow production and shorten the pump's life....
University of Vermont Incorporates Sensors in State Bridges
Nov 1, 1997 — To monitor the structural health of Vermont's aging bridges, the University of Vermont in Burlington has spearheaded a campaign to equip some bridges with an array of different optical sensors. Campaign to equip some bridges with an array of...
EG&G to Supply Detector for GE Digital X-Ray
Oct 1, 1997 — SANTA CLARA, Calif. -- An amorphous silicon detector built by EG&G in Santa Clara will form the backbone of General Electric's new digital x-ray system, which could reduce or eliminate the need for x-ray film as well as speed processing time and...
Fiber Optic Switch Sheds Light on Cancer Research
Oct 1, 1997 — Researchers at the University of Pennsylvania are focusing on the application of near-IR light to probe the oxygenation states of tissues for diagnostic and functional imaging purposes. As part of a breast cancer study, the team is using a technique...
Fish Dine by Carefully Monitored Light
Oct 1, 1997 — Do the gilled inhabitants of Georges Bank, an important feeding and spawning ground just east of Cape Cod, Mass., prefer to take their meals at high noon, or are their appetites whetted by the ambiance of a sunset or the moonlight? Researchers...
FORTE Satellite to Record Lightning Strikes
Oct 1, 1997 — The FORTE satellite is orbiting Earth after a successful launch on Aug. 29. The satellite, which is a joint project of Los Alamos National Laboratory and Sandia National Laboratories in New Mexico, will test ways of detecting illegal nuclear weapons...
IR Cameras Keep Texas Police ALERT
Oct 1, 1997 — Criminals in the Dallas area who rely on the cover of night are no match for local law enforcement's latest weapon. The US Department of Transportation and the Texas Transportation Institute recently employed Raytheon TI Systems' NightSight infrared...
Laser maker aims at paparazzi
Oct 1, 1997 — MARCOUSSIS, France -- While the world's wrath turned on the paparazzi in the wake of the death of Diana, Princess of Wales, one French laser maker has done something about it. Photographers skulking around hotels or lying in wait to ambush...
NIST Develops Stable Optical Retarder
Oct 1, 1997 — Scientists at the National Institute of Standards and Technology's (NIST) Optoelectronics Div. have developed a stable linear optical retarder for use as a calibration reference. Optical retarders, known as wave plates, are critical for polarization...
Raman Spectroscopy Could Simplify Pollution Monitoring
Oct 1, 1997 — COLUMBIA, Mo. -- Power plants must continuously track the amount of carbon monoxide, sulfur dioxide and nitric oxide that emit from their smokestacks. There usually is a separate detection system for each pollutant, but research at the University of...
Researchers fired up about infrared alarm
Oct 1, 1997 — WEST LAFAYETTE, Ind. -- The old adage "Where there's smoke, there's fire" could give way to "Where there's flickering infrared radiation, there's fire," if researchers at Purdue University have their way. They have developed a fire detection device...
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May 2024
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