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Industrial Features
Novel Technology Could Increase Thermal Imaging Use
The desire to “see” in complete darkness or through obscurants such as smoke or fog has driven the development and adoption of thermal imaging technology in numerous industries. Thermal imaging translates a scene’s heat signature — the long-wavelength infrared energy produced in the 8- to 14-μm waveband — into digital data that can be used to produce a visible image or be fed into a computer for interpretation. Because the thermal energy of a scene is independent of reflected light and...
Photonics Spectra, October 2006
Selecting the Best Optical Mount
There are many types of mounts that can be used to hold and adjust mirrors, beamsplitters, lenses and other round, thin optics. Companies offer an extensive array of such products, from inexpensive fixed mounts to sophisticated adjustable...
Photonics Spectra, October 2006
Slab-Coupled Optical Waveguide Lasers Emerge from a Multimode Sea
Since the invention of diode lasers in 1962, researchers have sought to increase the power available from them in a single spatial mode. Because of their high brightness, single-mode diode lasers have many advantages for a variety of applications....
Photonics Spectra, October 2006
Smart Cameras Are Earning a Niche in Machine Vision
With apologies to Forrest Gump: Smart is as smart does. As the cost of memory and processor chips has dropped, camera vendors have crammed more and more intelligence into their devices. Consequently, current instruments can run the latest operating...
Photonics Spectra, October 2006
Suitability of Nanotube Films Depends on How They Are Made
At the University of Southern California in Los Angeles, scientists have reported that not all carbon nanotubes are equal as replacements for the transparent ITO electrodes in organic LEDs (OLEDs) and other photonic devices, such as organic...
Photonics Spectra, October 2006
Two-Photon Polymerization: A New Approach to Micromachining
The rapid technical development of ultrashort laser systems is creating exciting possibilities for very precise localization of laser energy in time and space. These achievements have triggered novel laser applications based on nonlinear interaction...
Photonics Spectra, October 2006
Circular Bragg Grating Boosts LED Output
A team of scientists at the National Institute of Standards and Technology in Boulder, Colo., has demonstrated that etching a circular Bragg grating into the surface of a semiconductor LED increases light extraction sevenfold. Such structures are of...
Photonics Spectra, September 2006
Improving Optical Free-Form Production
Production of free-form optics is one of the most challenging areas in the precision optics industry, creating continuously increasing demands on the machine manufacturers. Free-form optics include rotationally symmetric parts, such as aspheres and...
Photonics Spectra, September 2006
Plasma Deposition Yields Thin Films of Optically Active Dyes
Scientists in Europe have reported the development of a single-step, room-temperature plasma-enhanced chemical vapor deposition process that yields polymeric thin films incorporating isolated rhodamine molecules. They note that the method is...
Photonics Spectra, September 2006
Remote Laser Welding in Industrial Applications
The market for industrial laser systems is very mature and has been growing steadily for almost 30 years. In 1979, the first two-dimensional laser-cutting systems were introduced as tools for the fabrication industry. Today, this market has expanded...
Photonics Spectra, September 2006
Robust Light Propagated in Ultralarge-Mode-Area Fibers
In the past few years, ytterbium-doped fiber lasers have achieved diffraction-limited outputs at multiple kilowatt levels, and they now compete with or surpass their more complex counterparts: bulk, solid-state lasers. An all-fiber approach offers...
Photonics Spectra, September 2006
UV-Shifted Silicon Devices for Imaging and Detection
Ultraviolet and vacuum UV detection and imaging sensors are required for scientific instrumentation — UV spectrometers and camera systems — used to evaluate the uniformity of beams in vacuum UV lithography equipment. Conventional CCD and CMOS...
Photonics Spectra, September 2006
Visionary Hookups
The good thing about standards, it has been said, is that there are so many to choose from. That is certainly proving to be the case for the standards used to operate the interfaces of machine vision cameras. With the properly matched camera...
Photonics Spectra, September 2006
Building Semiconductor Structures in Optical Fiber
The backbone of the information superhighway comprises optical fiber. Optical fiber technology has lead to the revolution in telecommunications and is affecting many other fields, from defense and remote sensing to biomedicine. This impact is...
Photonics Spectra, August 2006
Excimer Laser Advances Enable High-Performance Flat Panel Displays
Many high-performance flat panel displays, including the latest active-matrix organic LED and system-on-panel devices, are based on polycrystalline silicon (“polysilicon”) rather than on the more widely used amorphous silicon....
Photonics Spectra, August 2006
Fizeau Interferometers Evaluated Using FlashPhase and Phase-Shift Fringe Analysis
Interferometers have been conventional tools for the optical industry and for optical engineering and research for at least three decades. They are used in optical metrology, in the semiconductor industry, for military applications, for laser design...
Photonics Spectra, August 2006
Laminated OLEDs Avoid Vacuum Processing
Investigators at GE Global Research in Niskayuna, N.Y., may have found a way to make OLEDs practical for general lighting applications. They have demonstrated a simple roll-to-roll lamination process that could be used to fabricate an OLED-based...
Photonics Spectra, August 2006
SOLID-STATE LIGHTING: Where Are We Going, What Are We Doing?
The LED industry and its organizations seem to be approaching the problem of establishing an infrastructure for the technology from the wrong end. We are examining specific “problems” with the assumption that solid-state lighting is mature and needs...
Photonics Spectra, August 2006
Cryogenic Laser Photolithography Finds Quantum Dot Registration
In quantum dot information processing, it is critical to be able to register the position of a single quantum dot with respect to the antinode of a defect (missing hole) in a photonic crystal to create strong coupling and cavity quantum...
Photonics Spectra, July 2006
How Much Energy Are You Throwing Away?
The Gaussian beam profile of a TEM00 laser is suitable for many applications. For targeting and alignment, the peaked Gaussian beam enables pinpoint precision. However, it is not ideal for other applications, including lithography, biomedical...
Photonics Spectra, July 2006
Measuring 3-D Semiconductor Packaging
Since the early 1900s, science and industry professionals have been using optical measurement and inspection for a clearer view of their products for research, development and manufacturing. These techniques of observing, measuring and analyzing...
Photonics Spectra, July 2006
PCI Motion Control in Microscope Automation
Over the past 15 years, microscopes have been transformed from devices for which the operator had to adjust the stage position, focus, filters and shutters by hand, into advanced systems in which these functions are automated. This has paved the...
Photonics Spectra, July 2006
Photonic Crystal Improves Output of Quantum Dot Films
The addition of a 2-D photonic crystal to the surface of LED structures boosts the output of these devices by freeing light that otherwise would be trapped inside. A team of scientists from the University of California, Santa Barbara, and from...
Photonics Spectra, July 2006
Subdiffraction-Limit Microscopy Exposes Vesicle Dynamics
Using a variant of fluorescence microscopy that enables subdiffraction-limit resolutions, scientists at Max Planck Institut für Biophysikalische Chemie in Göttingen, Germany, have imaged synaptic vesicle recycling in cultured neurons. The...
Photonics Spectra, July 2006
Fluorescent/Phosphorescent White Organic LEDs Employ Singlets and Triplets
In their continuing pursuit of a replacement for the incandescent light bulb, researchers at Princeton University in New Jersey and at the University of Southern California in Los Angeles, with the support of Universal Display Corp. of Ewing, N.J.,...
Photonics Spectra, June 2006
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