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(38,329 articles)
Popular News
Liquid Used as Lens for Miniature Cameras
Oct 1, 2004 — As cell phone cameras and other optical devices become smaller and smaller, the lenses become more complex. When the surface-to-volume ratio increases, so does friction, making it difficult to fabricate tiny lenses with moving parts. As a possible solution, a group at Philips Research Eindhoven in the Netherlands has developed a variable-focus liquid lens with no moving parts. The meniscus between two immiscible liquids forms the lens. One of the liquids is an electrically conducting aqueous...
An Organic Field-Effect Transistor Emits Ambipolar Light
Oct 1, 2004 — A new light-emitting field-effect transistor suggests the possibility of electrically pumped organic lasers, potentially prompting investigators to consider novel approaches to multifunctional field-effect devices. A group of researchers from the...
Thermally Actuated Fabry-Perot Filter Tunes Across C- and L-Bands
Oct 1, 2004 — A tunable filter at the output of a semiconductor laser could tune the laser's output across a range of wavelengths. Such a tunable laser would be invaluable in fiber optic communications systems because it could not only reduce the number of spare...
Mode-Locked Laser Has Potential as OC-768 Transmitter
Oct 1, 2004 — A research group at Massachusetts Institute of Technology's Lincoln Laboratory in Lexington, Mass., has designed, built and operated a 40-GHz mode-locked hybrid fiber/semiconductor laser that has potential as the transmitter in next-generation...
Advances Lead to Miniature Supercontinuum Sources
Oct 1, 2004 — Supercontinuum sources are finding increasing use in applications that require a source with very broad spectral bandwidth and high spatial brightness. A common method of generating supercontinuum light has involved the coupling of the output from a...
Robot Explores Gas Mains in New York
Oct 1, 2004 — A self-propelled robot may be coming to the rescue of old, decaying gas lines running under New York and surrounding areas. With some pipes dating to the late 1800s, maintenance is a challenge made even more difficult by the city's web of...
Automation Advances Life Sciences Microscopy
Oct 1, 2004 — Automated microscopy in the life sciences can trace its beginnings to the semiconductor industry. In the 1970s, automated microscope stages were developed and used extensively for wafer inspection in semiconductor fabrication. By grafting motorized...
Spinning Disk vs. Laser-Scanning Confocal Microscopes
Oct 1, 2004 — When imaging thick biological specimens, light from out-of-focus planes often obscures the fluorescence of structures of interest. Various confocal methods can remove out-of-focus light to reveal the structures. Different confocal systems allow...
Through the Looking Glass and What Cavity Ringdown Found There
Oct 1, 2004 — What is air? Scientists worldwide continue to focus their attention and their instruments on answering that simple question with an ever-increasing standard for accuracy. It is no longer sufficient to know that air is composed mostly of nitrogen and...
When the Light Fails
Oct 1, 2004 — Proper lighting is an important part of any machine vision system. Obviously, the lighting needs to be adequate, but it also should be arranged so that it amplifies the things you want the vision system to see while attenuating those you don't....
UV LEDs Suitable for Fluorescence Spectroscopy
Oct 1, 2004 — LEDs that emit in the 340-nm wavelength range have been developed by scientists in the division of engineering and department of physics at Brown University in Providence, R.I., and in the department of electrical engineering at Yale University in...
Improvements Sought in Nitride-Based LEDs
Oct 1, 2004 — A team of engineers at National Cheng Kung University in Tainan, Taiwan, has reported the results of its investigations into the fabrication of InGaN/GaN multiple quantum-well green LEDs by metallorganic chemical vapor deposition. The group hopes...
Offering More Performance for Less Money, Accurately
Oct 1, 2004 — The optical engineering discipline has entered a golden age. The computational power of personal computers has steadily increased for 20 years while costs have fallen. Similarly, the technical capability of optical design software has increased...
Interoperability in Optical Design Tools
Oct 1, 2004 — Today's photonics market is demanding optical design tools that not only are powerful and easy to use, but that also work well with a company's already-established set of software tools. Optical, mechanical, dynamic and other software tools work...
Better Illumination Design Through Automated Optimization
Oct 1, 2004 — Light pipes couple and shape light-source output distribution in a variety of illumination applications, including automotive and avionic displays, fiber optic illuminators and display backlights. Traditionally, successful design of these systems...
Motion Control Meets the Vacuum
Oct 1, 2004 — Traditional motion-control devices, including stepper motors and DC servomotors, were designed for the industrial manufacturing environment and brought repeatability and accurate automation to processes such as cutting and welding. However, most of...
Motion and Vibration Control in Ultrafast Research
Oct 1, 2004 — Research into ultrafast phenomena continues to be a dominant area of investigation, with wide-ranging applications in biological imaging, remote sensing, materials analysis and machining. Scientists continue to look for techniques to improve system...
High-Power Pulsed Laser Diodes Take on New Industrial and Commercial Applications
Oct 1, 2004 — The ability of pulsed laser diodes to provide short pulses of intense power has made them an ideal choice for military applications such as target designating and rangefinding. Indeed, much of the historical motivation for developing these diodes...
Jobs in Photonics
Oct 1, 2004 — When Photonics Spectra conducts a research project with its readership, the results are not always what we anticipate. Salary surveys for our industry in particular can be quite revealing because this topic is not often discussed and the information...
EM4 Acquires Assets of PowerNetix
Oct 1, 2004 — Supplier of photonic and integrated optic modules EM4 Inc. of Bedford, Mass., has purchased the intellectual property and assets of PowerNetix Inc. The acquisition includes the San Jose, Calif., company's packaging technology, optical manufacturing...
Video Display and e2v technologies Enter into Agreement
Oct 1, 2004 — Video Display Corp. of Tucker, Ga., has arranged to acquire the Pevicon camera tube assets and business of e2v technologies ltd. of Chelmsford, UK, and intends to integrate the operation into its infrared Teltron Technologies facility in Birdsboro,...
US Company Chosen as Supplier for German Space Projects
Oct 1, 2004 — Tesat-Spacecom GmbH & Co. KG of Backnang, Germany, has selected Discovery Semiconductors Inc. of Ewing, N.J., to supply fiber-coupled, high-speed photodiodes for space applications. Discovery, which has passed environmental tests such as gamma...
JDS Uniphase Buys, Divests Businesses
Oct 1, 2004 — In California, JDS Uniphase Corp. of San Jose has expanded its high-definition display business with the purchase of Advanced Digital Optics Inc. for approximately $12 million in cash. By acquiring the Westlake Village company, JDS will enhance its...
Novalux and Edmund Industrial Optics Form Distribution Partnership
Oct 1, 2004 — Novalux Inc. of Sunnyvale, Calif., has signed a North American distribution agreement with Edmund Industrial Optics of Barrington, N.J., for its Protera Center for Devices and Radiological Health-compliant laser systems. Based on Novalux's patented...
Honeywell Granted Rights to Optrand's Sensing Technology
Oct 1, 2004 — Under a signed agreement, Honeywell of Morris Township, N.J., has garnered the exclusive rights to Optrand's fiber optic sensing technology for direct measurement of in-cylinder pressure in engine applications. The sensing enables a higher level of...
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