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Long-Range Surveillance Day or Night Long-Range Surveillance Day or Night
Law enforcement and security professionals who safeguard borders, ports, nuclear power and chemical plants, and other high-value/high-danger assets deploy thermal imaging cameras as a critical component to their overall day/night situational awareness plans. One benefit of this type of camera as opposed to light-intensifying night-vision technology or infrared illuminators is that, with thermal technology, radiation emitted from objects can be sensed, providing imagery independent of light,...
Photonics Spectra, April 2004
Near-Field Holography Manufactures Submicron Gratings Near-Field Holography Manufactures Submicron Gratings
Gratings with a 200- to 600-nm pitch are necessary for telecommunications devices such as passive optical components and InP laser diodes. They also are required in some emerging applications, including biosensors and various microelectromechanical...
Photonics Spectra, April 2004
Outsourcing: A Growing Trend for Optomechanical Assemblies Outsourcing: A Growing Trend for Optomechanical Assemblies
One area of the optics industry that continues to experience growth is that of precision optomechanical assemblies. This trend runs in parallel with increased reliance on more sophisticated laser-based instrumentation, which places extreme demands...
Photonics Spectra, April 2004
Spectroscopy Takes Security into the Field Spectroscopy Takes Security into the Field
With important advances in the miniaturization, cost and performance of optoelectronic devices and sampling accessories, techniques such as fluorescence spectroscopy and laser-induced breakdown spectroscopy have found new applications in...
Photonics Spectra, April 2004
Strengthening Global Surveillance and Security
Patrolling national borders, detecting explosives and weapons in luggage and cargo and scanning battlefields for toxins are different tasks, yet they all have something in common. They are undertaken to ensure global security, the need for which is...
Photonics Spectra, April 2004
Testing the Water Testing the Water
Shortly after Sept. 11, an incident arose in which a water reservoir had been tampered with. The severity and seriousness of the act resulted in speculations of terrorist activity. The reservoir in question was the primary water source for a...
Photonics Spectra, April 2004
Vacuum Sealing Adds Life to Scientific CCDs Vacuum Sealing Adds Life to Scientific CCDs
Perhaps a key question for any scientific imaging application is how long the CCD camera will last before the chip underperforms. One major “camera killer” is condensation on the chip. Most cameras leave the factory virtually blemish-free, but over...
Photonics Spectra, April 2004
X-ray System Provides Improved Baggage Screening X-ray System Provides Improved Baggage Screening
Ensuring the safety of airline passengers has created a demand for larger, more robust security devices at baggage check-in sites. Previous x-ray systems could scan baggage but could neither detect three-dimensional objects nor automatically discern...
Photonics Spectra, April 2004
Alkali Lasers Challenge Thin Disks and Fibers Alkali Lasers Challenge Thin Disks and Fibers
What led you to investigate alkalis as laser materials? I’m an inventor, an applied scientist. I like asking what the problem is and then looking for solutions to it. At any given time, we have an arsenal of lasers and we often try to force...
Photonics Spectra, March 2004
Automation Speeds Fiber Alignment Automation Speeds Fiber Alignment
Coupling a single-mode fiber to the lens of an infrared diode laser is one of the most common optical fiber alignment tasks. The success of this pigtailing process depends on accurate manipulation of the fiber in the X-, Y- and Z-axes, typically to...
Photonics Spectra, March 2004
CO2 Lasers Maintain Their Momentum
Even in last year’s somewhat slow market, CO2 laser technology remained a strong contender in industrial laser applications — cutting and welding in particular. The technology also made incremental gains in applications such as cladding and marking....
Photonics Spectra, March 2004
CO2 Technology Continues to Evolve CO2 Technology Continues to Evolve
The first commercial application for CO2 lasers was wire stripping — using a large, flowing gas system that required regular repair and maintenance. Today, the latest developments for this type of laser include a system scheduled for launch into...
Photonics Spectra, March 2004
Fiber Lasers Poised to Seize Market Share Fiber Lasers Poised to Seize Market Share
Significant progress over the past two years in the development of fiber lasers has led to an increase in the CW power of single-fiber devices from 130 W to 1 kW. Advances in fiber design have played a major role, particularly the development of...
Photonics Spectra, March 2004
Fibers Deliver CO2 Laser Beams for Medical Applications Fibers Deliver CO2 Laser Beams for Medical Applications
An innovative class of optical fibers was developed several years ago at Massachusetts Institute of Technology in Cambridge, based on 1998 work with photonic bandgap reflectors, a new type of dielectric mirror that can reflect light and that...
Photonics Spectra, March 2004
FT Interferometry Measures Homogeneity FT Interferometry Measures Homogeneity
Today’s advanced semiconductor applications have pushed the limits of optical lithography systems. While the ability to fabricate optical components to their surface-form specifications is critical, the quality of the glass itself — or more...
Photonics Spectra, March 2004
Hollow Retroreflectors Promote Precision Optical Alignment Hollow Retroreflectors Promote Precision Optical Alignment
Precision optical alignment capability across a range from the UV to the far-IR and a lighter-weight design have long given hollow retroreflectors an advantage over their solid cousins (retroreflector prisms) in boresighting, laser tracking,...
Photonics Spectra, March 2004
Hollow Silica Waveguides Offer IR Solutions Hollow Silica Waveguides Offer IR Solutions
Applications in the mid- and far-infrared regions have long suffered from the lack of a reliable, cost-effective means of guiding optical power in an optical fiber or other flexible waveguide. Many systems still depend on line-of-sight...
Photonics Spectra, March 2004
Inductively Coupled Plasma Fuels Elemental Spectroscopy Inductively Coupled Plasma Fuels Elemental Spectroscopy
Over the past three decades, inductively coupled plasma, which forms during inductive heating of ionized gas, has become a valuable source for elemental spectroscopy. In induction-coupled plasma spectroscopy, plasma formation involves passing an...
Photonics Spectra, March 2004
Kinematics and Precision Stages Drive Laser Welding Kinematics and Precision Stages Drive Laser Welding
No longer an exotic manufacturing application, laser welding is now a common production tool for processing pacemakers, defibrillators and other implantable medical devices. Applying the weld to the seams of these devices requires precise firing...
Photonics Spectra, March 2004
Light Engines Enhance Machine Vision Illumination Light Engines Enhance Machine Vision Illumination
Even the most sophisticated machine vision system will fail if the lighting isn’t right. Variations in intensity, poor color rendering or even a simple lack of brightness can affect imaging system performance, and any vision system design must...
Photonics Spectra, March 2004
Low-Power Lasers Make Their Mark Low-Power Lasers Make Their Mark
Although sealed CO2 lasers have been used to mark plastics, paper and other organic materials for years, two recent areas of growth include the marking of metals and glass — applications once considered the domain of other, often higher-cost...
Photonics Spectra, March 2004
New Support Systems Pack on More Power New Support Systems Pack on More Power
In manufacturing applications from welding to cutting and powdered metal deposition, the thirst for laser power is pushing CO2-based laser machining systems to higher power levels. As laser source technology advances, a need to harness this power...
Photonics Spectra, March 2004
Optical Profiling Techniques Characterize Free-Form Optics Optical Profiling Techniques Characterize Free-Form Optics
Optics that deviate from the traditional spherical shape are increasingly popular in optical designs because of their superior image quality, reduced cost and smaller space requirements. The increased availability of free-form optics is attributable...
Photonics Spectra, March 2004
Positioning Precision Takes Center Stage Positioning Precision Takes Center Stage
These basic laws of physics can frustrate any system designer’s best efforts to move a component from point A to point B rapidly and to stop it on the desired target. In most cases, the positioning system must repeat this action over and over with...
Photonics Spectra, March 2004
Positioning Systems Make Submicron-Level Moves Positioning Systems Make Submicron-Level Moves
Demanding by their very nature, submicron and nanometer-scale positioning tasks are further complicated when the management of motion is under vacuum or when it requires extended travel, more repeatability, higher speed or greater uptime — of...
Photonics Spectra, March 2004
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