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(38,293 articles)
Popular News
Photonics in: Medicine
May 1, 2000 — Photonics plays a key role in medicine and health care. Lasers, with their precise targeting of tissues and locations, have found a home in many areas of surgery. Digital images and their transmission and display are critical in diagnostic procedures. These are not niche applications, either. An estimated 1 million laser-assisted in situ keratomileusis (LASIK) procedures were performed in the US last year, with twice that number predicted for 2001. The growth rate may be even higher outside t...
Photonics in: Military/Aerospace
May 1, 2000 — The technological force that was on display during the Persian Gulf conflict in the early 90’s represented the beginning of the end for the military’s traditional role as the sole standard-bearer of advanced technology. The New World...
Plastic Optics Challenge Glass
May 1, 2000 — Injection-molded plastic optics with precision requirements were most likely first produced in high volume by Eastman Kodak Co. during the 1960s. The lenses were spherical and crude by today’s standards. In the late 1960s, Polaroid Corp. and...
Quantum Cascade Lasers Make Sense for Sensing
May 1, 2000 — Chemical sensing has enormous potential in environmental monitoring, medical applications and industrial process control. Recent studies have linked airborne heavy carbon isotopes to the early formation of ulcers and some stomach cancers. New...
Technology Close-Up:
May 1, 2000 — Determining an application’s parameters and requirements is important when shopping for an image sensor. The goal is to match the capabilities and limitations of the sensor to the application’s price and performance needs. Image sensor...
Photonics in: Telecommunications
May 1, 2000 — The telecommunications industry is in a frenzy to deliver more bandwidth. The (mostly) all-optical network concept, with a modicum of mechanical and electrical switches, is the future. But before that happens, the industry must learn to integrate...
Opening the Terahertz Window
May 1, 2000 — Exploration of the far-infrared region of the electromagnetic spectrum has been frustrated by the difficulty of generating and detecting radiation at terahertz frequencies (0.1 to 10 THz). Researchers had to contend with low-brightness thermal...
Cognex to Buy Machine Vision Business
May 1, 2000 — In an agreement valued at up to $19 million in cash, Cognex Corp. of Natick, Mass., plans to purchase the machine vision business of Tokyo-based Komatsu Ltd. Under its terms, Cognex would acquire the rights to Komatsu's machine vision...
JDS Uniphase, E-Tek Merger Under Review
May 1, 2000 — The Antitrust Div. of the US Department of Justice has requested additional information and documentary material relating to the planned merger of JDS Uniphase Corp. of Nepean, Ontario, Canada, and E-Tek Dynamics Inc. of San Jose, Calif., under the...
Lucent Contracted for Chinese Networks
May 1, 2000 — Lucent Technologies of Murray Hill, N.J., has announced that it has signed supply contracts totaling more than $145 million with two telecommunications companies in China. Lucent will provide its WaveStar dense wavelength division multiplexing...
Tactical Laser Concept Examined
May 1, 2000 — Officials from the US Department of Defense discussed the Airborne Tactical Laser concept at a conference of the National Defense Industries Association in Washington. The 300-kW chemical oxygen-iodine laser is a possible candidate for the Defense...
IR Simulation Leaves Waco Tragedy Unresolved
May 1, 2000 — On March 19, eight men at Fort Hood, Texas, fired assault rifles, machine guns and grenade launchers as aircraft fitted with forward-looking infrared cameras collected images. Officials hope that the images from the tests will end speculation that...
Infrared Sensor Watches for Black Ice
CANBY, Ore. -- CANBY, Ore. -- Black ice is a tricky thing. You’re sailing down the freeway because everything looks fine, when suddenly the next curve you maneuver sends you into a spin. Now, an infrared temperature sensor promises to alert drivers to this...
IR Exposes Gas-Phase Metal Carbides
NIEUWEGEIN, Netherlands — Researchers have produced the first direct infrared spectra of the gas-phase metal carbide clusters Ti8C12 and Ti14C13. The vibrational spectra, which reflect the atomic forces that give a molecule its structure, support earlier conceptions of the...
Smaller Chips See Larger Markets
May 1, 2000 — New complementary metal oxide semiconductor technology from Philips Semiconductor of Eindhoven, the Netherlands, is under development for low-cost video imaging applications. The company says its proprietary SeeMOS technology enables the production...
Luminescent Materials Show Structure Damage
MALVERN, UK -- MALVERN, UK -- Flashes of light given off by crystals as they fracture may provide clues to structural problems in composite materials used on aircraft and racing cars. When combined with optical fiber and silicon photodiodes, triboluminescent...
Scientists Resolve Ionization Debate
FRANKFURT, Germany -- FRANKFURT, Germany -- Since 1983, physicists have argued over how intense laser beams can multiply ionized atoms. Three paradigms competed to fill the theoretical void. Now the work of two independent teams in Germany seems to have put the issue to...
Doped Pentacene Yields Efficient Plastic Solar Cells
MURRAY HILL, N.J. -- MURRAY HILL, N.J. -- Organic solar cells have a singular advantage over their inorganic counterparts: They are much less expensive to produce. Unfortunately, their application has been held back by lagging energy conversion efficiencies. Now, a team...
High-Power Lasers Do the Work of Four
May 1, 2000 — Santa Clara, Calif.-based Coherent Inc. has delivered prototypes of its proprietary optically pumped semiconductor lasers for testing in telecommunications applications, such as pumping erbium-doped fiber amplifiers. The 980-nm fiber-coupled devices...
Large IR Sensor Peers Deeper into Space
May 1, 2000 — A 2048 x 2048-pixel infrared sensor developed by the Rockwell Science Center in Thousand Oaks, Calif., is on its way to the University of Hawaii’s Institute of Astronomy in Manoa Valley, Oahu. The HgCdTe device, which is sensitive in the 0.9-...
Light Drives Molecular Motor
GRONINGEN, Netherlands -- GRONINGEN, Netherlands -- Scientists at the University of Groningen and Tohoku University in Sendai, Japan, have used light to power one of the first working single-molecule motors. When irradiated with ultraviolet light, the molecule rotates...
Lasers Manipulate Condensate
GAITHERSBURG, Md. -- GAITHERSBURG, Md. -- Researchers at the National Institute of Standards and Technology have used lasers to write and then read quantum-mechanical phase patterns in a Bose-Einstein condensate -- an ultracold cloud of atoms that share the same quantum...
One-Atom Maser Confirms Planck’s Theory
May 1, 2000 — Nearly a century after Max Planck explained changes in the spectra of hot radiating bodies in terms of quanta, a team from the Max Planck Institute for Quantum Optics and the University of Munich, both in Garching, Germany, have demonstrated the...
Mongrel Particles Act like Bosons
SOUTHAMPTON, UK -- SOUTHAMPTON, UK -- Strange quasiparticles made of photons and electrons may lead to applications in quantum optoelectronics, including high-efficiency microlasers, optical amplifiers and switches. The particles, called polaritons, display properties...
Sensitization Produces High-Efficiency Organic LEDs
PRINCETON, N.J. -- PRINCETON, N.J. -- Organic LEDs promise much to the commercial display industry -- cool, low-voltage operation, smaller pixels, low cost -- but manufacturing difficulties and efficiency problems have prevented them from penetrating the market. A...
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July 2024
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