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Driving Down Detection Limits
Identifying and quantifying the presence of metals is an important factor in determining environmental, public health and product quality. Metals can be either harmful or beneficial, and the amount of the metal present in a given substance often is the sole determinant of which effect is observed. Since the advent nearly 40 years ago of commercial instruments that can sensitively measure metal concentration levels, the scope of elements detected and the limits of detection have steadily...
Photonics Spectra, February 2004
Fluorescence Detection Gains in Sensitivity
The biotechnology and medical diagnostics industries could soon benefit from a technique that promises enhanced sensitivity over conventional fluorescence detection methods. Developed at the University of Maryland in Baltimore and called directional...
Photonics Spectra, February 2004
Hybridizing Spectroscopic Techniques
Any given material can be characterized using a wide variety of spectroscopic techniques, each of which provides useful information. Depending on the material in question, of course, some methods are more effective than others. For example,...
Photonics Spectra, February 2004
Infrared Cameras Take Off in New Directions
The principles behind infrared technology have not changed much since they were developed in the 1800s, yet advances in sensors, electronics and optics give rise to new applications for IR cameras every day. Higher speed, greater field of view,...
Photonics Spectra, February 2004
Infrared Thermography Streamlines Automotive R&D
Infrared thermography inspection has become a powerful tool in the automotive research and development toolbox, not only saving time and expense, but also adding the unique advantage of radiometric imaging. Two recent examples of IR thermography in...
Photonics Spectra, February 2004
IR Imaging Assesses Damage in Mechanical Parts
Testing the damage induced by fatigue loading to mechanical structures has traditionally been a challenge because it requires a number of samples and many mechanical tests to obtain an accurate figure of the damage mechanisms and their values. Using...
Photonics Spectra, February 2004
Laser Diode Manufacturers Turn Up the Power
By one estimate, the global market for high-power laser diodes could approach $450 million by 2006 (Figure 1). So it perhaps comes as no surprise that quite a few players have entered the market recently. To compete, they must accommodate...
Photonics Spectra, February 2004
Laser-Induced Breakdown Spectroscopy Moves Ahead
Although the first laser plasma was generated in the early years of laser development, it was not until the late 1990s that laser-induced breakdown spectroscopy escaped the borders of scientific curiosity. One can simply describe it as a technique...
Photonics Spectra, February 2004
Low-Temperature Measurement of Shiny Metals
Understanding and controlling the temperature of metals at all times during the manufacturing process is paramount if companies are to deliver products that are ever stronger and lighter. With new, unoxidized metals, the emissivity or radiation...
Photonics Spectra, February 2004
MCT-Based Cameras Uncover New Infrared Imaging Applications
Infrared cameras based on mercury-cadmium-telluride (MCT) focal plane arrays are finding their way into a growing number of imaging applications. Typical of these applications is the benefit of new levels of sensitivity in certain IR spectral...
Photonics Spectra, February 2004
Near-Field Scanning Optical Microscopy and Spectroscopy Advance
Although the rapid advance of scanning probe microscopy in the 1990s enabled routine imaging of unaltered samples at unprecedented nanoscale resolution, researchers still could not uniquely identify the chemical composition of materials and unveil...
Photonics Spectra, February 2004
OFC 2004 Highlights Broadband Access and Cost-Cutting Technologies
Broadband access, including fiber to the premises, and technologies that cut capital and operational costs are key issues that will be discussed at the Optical Fiber Communications Conference (OFC 2004) on Feb. 22 through 27 at the Los Angeles...
Photonics Spectra, February 2004
'Smart' Cameras Broaden Applications for Machine Vision
In its early days, machine vision was considered expensive, in need of more power, and difficult to learn and use. In recent years, however, the advent of “smart” cameras has ushered in an era of machine vision systems that successfully addresses...
Photonics Spectra, January 2004
4D Technology Wins Circle of Excellence Award
The ultrahigh-speed PhaseCam 4000 interferometer system from 4D Technology Corp. of Tucson, Ariz., captures high-accuracy, quantitative optical phase measurements. It uses a computer-generated holographic diffraction grating and a polarization phase...
Photonics Spectra, January 2004
Actuality Systems Wins Circle of Excellence Award
The Perspecta spatial 3-D system is a combination of software and hardware that enables the use of standard modeling applications to create high-resolution 3-D images. The system generates images with height, width and depth inside a 20-in. dome,...
Photonics Spectra, January 2004
Apollo Instruments Wins Circle of Excellence Award
Apollo Instruments Inc.’s F40-xxx-1 laser diode produces 40 W with ~4-MW cm–2 sr –1 brightness. The Irvine, Calif., company says that this is a magnitude high-er than other fiber-coupled laser diodes, and that the device is compact, reliable,...
Photonics Spectra, January 2004
Camera Technologies Advance and Expand
Users of detectors for all wavelengths of the spectrum have the same demands year in and year out: faster cameras, better resolution, improved sensitivity, smaller packages and easier-to-use software that will integrate seamlessly with a myriad of...
Photonics Spectra, January 2004
Carl Zeiss MicroImaging Wins Circle of Excellence Award
The ApoTome optical sectioning device from Carl Zeiss was designed to make it fast and easy to generate optical sections of biological fluorescence specimens. This optoelectronic add-on device for a fluorescence light microscope uses structured...
Photonics Spectra, January 2004
Coating Equipment Advances Thin-Film Applications
Even as the telecom market bubble burst, advances in optical coating technology developed for telecom applications began fueling advances in other application areas. Dense wavelength division multiplexing filters, for instance, place exacting...
Photonics Spectra, January 2004
Corning Wins Circle of Excellence Award
The OptiFocus Lensed Taper from Corning Inc. of Corning, N.Y., focuses light to very small spot sizes farther from the lens, thus avoiding yield loss and a greater amount of light being reflected off the surface. The company says its uniqueness...
Photonics Spectra, January 2004
Crystal Fibre A/S Wins Circle of Excellence Award
Crystal Fibre A/S of Birker/od, Denmark, designed its AIR-12-1060 air-guiding fiber to transmit around the Nd:YAG wavelength of 1060 nm. The fiber, which uses the photonic bandgap principle to trap light in the hollow core, guides the major part of...
Photonics Spectra, January 2004
Digital Imaging from the Inside Out
Companies that develop systems for medical imaging are motivated not only by the demand by hospitals for faster results at lower cost, but also by new imaging technologies. Radiology, like many branches of medical imaging, is going digital, and it’s...
Photonics Spectra, January 2004
Digital Radiography Gains Ground
Flat panel digital detectors were introduced in the 1990s as an alternative technology to traditional film, computed radiography and image intensifiers for diagnostic medical imaging. As their performance has improved, they have begun to challenge...
Photonics Spectra, January 2004
Disk Lasers Enable Application Advancements
The driving factor in the development of lasers for industrial materials processing is the demand for higher power levels combined with improved beam quality. Achieving this goal with conventional Nd:YAG rod lasers is limited because of thermal...
Photonics Spectra, January 2004
Eastman Kodak Co., Image Sensor Solutions Wins Circle of Excellence Award
The KAF-22000CE CCD large-format color image sensor from Eastman Kodak Co.’s Image Sensor Solutions of Rochester, N.Y., has 22 million pixels that produce high-resolution, high-quality images in digital still camera systems used by commercial...
Photonics Spectra, January 2004
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