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Sensors & Detectors News
Physicists Propose Novel Method to Catch Neutrinos
Jul 1, 1998 — For years, scientists have sought the elusive, weightless particles known as neutrinos. Neutrinos, which behave somewhat like photons (they can travel without changing direction through matter), are weakly interacting particles and so can travel much longer without interacting with interstellar matter. They are thought by some theorists to hold clues to the origins of the universe. Now two physicists from Columbia University have proposed building a telescope with a magnetic spectrometer that...
Physicists Report Neutrinos Have Mass
Jul 1, 1998 — In a discovery described as monumental, scientists report that neutrinos have a mass -- an observation that could alter current theories on dark matter and provide clues to the origin of the universe. The findings came from a $100 million detector...
Researchers Shrink Confocal Laser Microscope
Jul 1, 1998 — Scanning confocal laser microscopes are bulky and stay in one place. But a start-up company aims to find its success by miniaturizing these devices while still providing three-dimensional optical sectioning and high contrast. The battery-operated...
Target Acquisition:
Jul 1, 1998 — The criteria that the military uses to develop its targeting and surveillance imagers may be useful to those who are developing other types of imaging systems, such as microscopes, machine vision systems, consumer digital cameras and surveillance...
3-D Imager Has a Hand in Making Golf Gloves Fit
Jun 1, 1998 — Golfers may soon be able to send their hand measurements electronically to a glove manufacturing facility and receive custom-made gloves in just a few weeks. Photonics once again is the backbone of this capability. 4DI technology has also been...
Coating Method Makes Molecule-Thick Layers
Jun 1, 1998 — A method for dip coating a substrate with organic polymers may increase the efficiency of light-emitting diodes (LEDs) and computer displays while reducing costs and environmental hazards. The technique, being explored by a group of MIT researchers,...
Compact, Unattended Lidar System Relies on an Nd:YAG Laser
Jun 1, 1998 — Over the past 30 years, lidar systems have become increasingly useful for the study of air quality and dynamics. Lidar can measure vertical profiles of airborne particulates, wind speed and direction, water vapor, temperature and chemical species...
Facial Recognition System Verifies Driver's Identity
Jun 1, 1998 — A computerized facial recognition system, employing advanced algorithms coupled with off-the-shelf imaging equipment, has given this state's motor vehicles division an advantage in determining a license applicant's identity. Not long ago, there were...
Fibers in Spark Plug Monitor Ignition
Jun 1, 1998 — University of Texas researchers and the Ford Motor Co. are collaborating on a spark plug that employs fiber to monitor pre-ignition fuel concentration. The goal, said developer Mathew Hall, is reduced engine pollutants and improved performance by...
Inexpensive Infrared Sensors Rely on Microcantilever
Jun 1, 1998 — In a bid to provide an alternative to high-priced, cooled IR detectors, Sarcon Microsystems Inc. of Knoxille, Tenn., has developed a microcantilever-based sensor priced at about $4000 for a 240 3 320 array. Cooled IR detectors can cost upward of...
Infrared Thermography Unearths Hidden Graves
Jun 1, 1998 — Rarely is a suspect tried for murder in a case where no corpse has been found -- a frustrating predicament when law officials believe they know the crime has been committed and who the murderer is. Homicide investigators and search specialists often...
News Flash Photonics Assesses El Niño's Devastating Path
Jun 1, 1998 — Anyone who turned on CNN this winter remembers the images: expensive homes teetering on the edge of rocky cliffs, vulnerable to the Pacific's waves. Those familiar images were the result of El Niño -- the weather phenomenon blamed for...
Pentagon Urges Cooperation on Weapons Planning with Allies in Europe, Japan
Jun 1, 1998 — In an effort to coordinate a better defense among allied nations, the Pentagon has called for increased cooperation with Japan and Europe in the production of new weapons, including remote sensors. US Undersecretary of Defense Jacques Gansler said...
Phoenix Finds the Flames
Jun 1, 1998 — A team of engineering students from Trinity College in Hartford, Conn., took the No. 1 prize in an international contest to build a computerized robotic device that detects fire. The robot, dubbed Phoenix, employed IR sensors for edge and heat...
Researchers Unveil Metal-Free Cathodes for LEDs, Photodetectors
Jun 1, 1998 — Scientists at Princeton University in New Jersey have developed a class of metal-free cathodes for use in organic light-emitting diodes (LEDs) along with phototransistors, photodetectors, solar cells and lasers. Typically, organic LEDs employ a more...
Scientists Evaluate Statues, Cathedrals with Laser Radar
Jun 1, 1998 — A research group here has collaborated with an Italian team to evaluate the integrity of ancient monuments and historical structures using laser radar that was originally designed for atmospheric sensing. The problem of decaying artifacts is nothing...
Telescope Analysis Yields Down-to-Earth Benefits
Jun 1, 1998 — Astronomers and astrophysicists studying the nature of celestial objects require clear, sharp images collected by astronomical telescopes. To accomplish this, the engineers who design and build these instruments must ensure that light from the...
Terrestrial IR Imaging Benefits from Aerospace Programs
Jun 1, 1998 — Infrared imaging systems are exploding into virtually every corner of the industrial workplace. Improved resolution, thermal sensitivity, ruggedness and portability of imager components have expanded the use of imaging systems, and a good many of...
Tiny Bubble Is Key to Optical Measurement
Jun 1, 1998 — Engineers at water treatment plants and other facilities that monitor biological and chemical pollutants in water are turning to optical techniques such as spectroscopy. These techniques are not without their drawbacks. Transparent cells holding the...
Transistors Work at Low Temp
Jun 1, 1998 — Engineers at Germanium Power Devices are refining a transistor that works at liquid helium temperature. The germanium field-effect transistor was pioneered by Texas Instruments but never put into extensive production. The Massachusetts company,...
Detector Choices:
May 1, 1998 — Whether they need to image faraway stars, microscopic organisms or bottles on an assembly line, users of imaging systems face many choices: What type of light will work best? How does color play a role? Where should I position the camera? In...
Earth Sensor Keeps Satellite on Track
May 1, 1998 — Researchers from 15 countries have gained new insight into ozone, thanks to the continuation of a series of joint missions by NASA and Germany's space agency DARA. The German-built Crista-Spas II was sent on an 11-day mission in August to study...
Filter Helps Predict Solar Flares
May 1, 1998 — Although it has been making tunable etalons since 1978, Queensgate Instruments Ltd. has outdone itself by developing a 150-mm etalon as part of a system that will enhance the US Air Force's ability to predict solar flares. In helping the Air...
Imaging Diagnoses Complex Chips
May 1, 1998 — Today's typical microprocessor is a complex creature. The continuing trend toward faster, smaller and denser CMOS circuits does not help engineers measure a chip's signals for possible defects. Traditional inspection methods, which involve probing...
Laser Seam Finder Outperforms Mechanical Version
May 1, 1998 — Some time ago, Weibull Workshops, a Swedish manufacturer of chassis for heavy vehicles such as trucks and buses, replaced its mechanical arc welder systems with a Motoman K10 arc welding robot, but the company continued to use a mechanical means to...
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September 2024
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