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Microscopy: Old Technology Gets New Life Jan 1, 1997 — Over the last 150 years of microscope development, an impressive array of innovations has come to light. Today’s seemingly commonplace imaging techniques include phase contrast, which won a Nobel prize for the Zeiss developer Frits Zernicke when introduced. Now, as progress continues for contrasting techniques such as brightfield, epifluoroscence and differential interference, some might speculate that the end is in sight for true optical innovations in light microscopy. But, with science...
Photonics Spectra, Jan 1997
Modular CCDs: Building Blocks for Large-Area Sensors Jan 1, 1997 — Using the concept of a jigsaw puzzle, the latest generation of high-resolution imagers is built up from several pieces of 1-megapixel blocks. Philips joins the pieces together using dedicated stitching patterns available on the masks during the...
Photonics Spectra, Jan 1997
Optical Software Undergoing Dramatic Change Jan 1, 1997 — Lens design software once was characterized by large, expensive and user-unfriendly programs running on large, expensive and painfully slow mainframe computers. Lens design was almost exclusively the domain of dedicated professionals in classical...
Photonics Spectra, Jan 1997
PC-Based Laser Analyzers: New Uses Require Improved Devices Jan 1, 1997 — Over the past few years the beam-profile quality of lasers has risen dramatically. Nevertheless, competitive pressures and demanding applications require even higher beam quality and are pushing the capabilities of many lasers. The only way to...
Photonics Spectra, Jan 1997
Raman Spectroscopy: Ready to Meet New Challenges Jan 1, 1997 — Once the realm of a few theorists, Raman spectroscopy has surged in popularity during the last decade. Improvements in optics, lasers, detectors and data analysis techniques have turned this laboratory technique into an industrial tool used even in...
Photonics Spectra, Jan 1997
Replica Molding: Complex Optics at Lower Costs Jan 1, 1997 — Researchers at Harvard’s Chemistry Department are exploring new ways of fabricating complex, optically functional surfaces, components and devices using elastomers as starting materials. Organic polymers in elastomeric molds show promise because...
Photonics Spectra, Jan 1997
Smart Lightpipe Designs Provide Cost-Effective Optics Jan 1, 1997 — For a technology that doesn't get much respect, lightpipes are undergoing remarkably rapid applications growth. Lightpipes carry light from sources -- incandescent or fluorescent lamps or light-emitting diodes -- to illumination tasks. Applications...
Photonics Spectra, Jan 1997
The Proactive View From Germany Jan 1, 1997 — As part of a joint presentation on Germany’s drive to keep pace in global, high-tech competition in research development and production, the Institute for Economic Research in Hamburg, Germany, suggests that the country must embrace an economic...
Photonics Spectra, Jan 1997
We Need to Curb Conflicts in Global High-Tech Jan 1, 1997 — There is remarkably little multinational cooperation for the development of new, commercially relevant technologies. There are regional efforts -- notably among the members of the European Union - but, even in Europe, national programs dominate...
Photonics Spectra, Jan 1997
Diode-Pumped Solid-State Lasers Find Their Place in the Lab Dec 1, 1996 — The $100 million-plus annual scientific laser market continues to be a prime area of opportunity and focus despite limited research and development expenditures in recent years. Historically dominated by gas, lamp-pumped solid-state and dye lasers,...
Photonics Spectra, Dec 1996
Laser Advances Spark Ultrafast Studies Dec 1, 1996 — Advances in solid-state short-pulse laser oscillators, amplifiers and ultrafast optics have sparked an explosion in the number of studies of ultrafast phenomena. These experiments include direct control of chemical reactions, direct observations of...
Photonics Spectra, Dec 1996
Laser Chemistry Moves Toward Smaller and Faster Probes Dec 1, 1996 — Molecular-level studies examine the effect of individual molecules on the properties of chemistry and materials. Recent progress in such studies has relied on some new laser techniques: Ultrafast lasers have recently reduced the time scale to break...
Photonics Spectra, Dec 1996
Lasers Control Molecular Motion Dec 1, 1996 — In quantum mechanics, interest has turned toward controlling, rather than explaining, atomic, molecular and electronic processes. The technology of coherent control employs light-induced interference to affect the dynamics of matter and assist in...
Photonics Spectra, Dec 1996
Lasers Offer Coherent Control of Material Behavior Dec 1, 1996 — The goals of laser control in chemistry include manipulation of collective and molecular properties. Femtosecond lasers have already helped study crystal lattices, and more extensive manipulations are expected because of advances in laser pulse...
Photonics Spectra, Dec 1996
Objective Measurements Improve Imaging Optics Dec 1, 1996 — Determining optical quality is no easy task because of the trade-offs in specifying imaging optics. For a quantitative assessment of optics, engineers turn to modulation transfer function measurements, which measure the frequency response of an...
Photonics Spectra, Dec 1996
Optical Fiber Reaches from Lab to Factory Dec 1, 1996 — The use of fiber optics in the laboratory has been steadily increasing for five years. Optical fiber devices can be used for temperature sensing, pressure sensing, pH measurements and material-specific sensing. However, the bulk of laboratory demand...
Photonics Spectra, Dec 1996
Photomultiplier Tubes See the Light -- One Photon at a Time Dec 1, 1996 — Dating archaeological finds, locating schools of fish, measuring food contamination, mapping the stars and monitoring pollution levels are all applications that requirer Raman spectroscopy. This article discusses appropriate optical fibers for each...
Photonics Spectra, Dec 1996
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