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True Invisibility Remains Elusive
But research moves toward practical applications of cloaking technology. Invisibility cloaks have long captured our imaginations, whether actual cloaks imbued with magical powers – see the Lord of the Rings and the Harry Potter series – or the conceptually related “cloaking technology” found everywhere in science fiction and high-tech action movies. The latter often come with a perfectly plausible, if not yet perfectly realized, explanation of how they might work. T...
Photonics Spectra, August 2012
Where the Jobs Are
In today’s recovering economic climate, the outlook for jobs in photonics, optics and related disciplines is generally more favorable than it has been and is showing signs of continuing improvement, according to one longtime recruiter for the...
Photonics Spectra, August 2012
All-Fiber Probes Hold Promise for Medical Imaging Applications
Optical fiber probes are still in the early stages of manufacturing, but filament fusion technology enables many probe designs, from ball lenses to fiber lenses, among others. Cleaving fiber bundles with high quality and good throughput facilitates...
Photonics Spectra, July 2012
Aspheres Deal with Bigger Deviations
New tools and the integration of measurement capabilities into design software are helping to solve problems – and scientists in academic and government laboratories are researching tomorrow’s solutions. Aspheres are increasingly used...
Photonics Spectra, July 2012
Beam Profiling Helps Make Medical Devices Better
The amount of time and energy needed to invest in the setup and use of an untried, but useful, piece of equipment can be daunting. But once some of the basics are explained, the initial effort seems far more palatable. Here is a look at how one...
Photonics Spectra, July 2012
DPSS Lasers Give Medical Device Manufacturing an Edge
With a wide range of wavelengths, short pulse durations, high average powers and high pulse energies, compact and cost-effective diode-pumped solid-state (DPSS) lasers have a promising future in medical device manufacturing. Medical device...
Photonics Spectra, July 2012
Electronics Augments Modern Process Control Spectroscopy
Good wavelength accuracy and high sensitivity are key optical features of a spectrometer system, although resolution is a matter of mechanical design. However, in process control, the detector array and the related readout electronics are often more...
Photonics Spectra, July 2012
Nanoscale Biomaterials Require Close Observation
Replacement bones and blood vessels are just two types of artificial tissues that require deep-imaging microscopy techniques to develop. Studying useful materials is not limited to macroscale structures such as sheet metal, optical glass, wood...
Photonics Spectra, July 2012
FEL Pulses and Ultrafast Lasers Team Up to Explore New Frontiers
Free-electron lasers are uniquely bright sources of extremely short x-ray pulses that can be combined with synchronized ultrafast laser pulses to perform cutting-edge experiments in physics and chemistry. In the short time of their existence as...
Photonics Spectra, June 2012
HiPER to Expand Europe’s Role in Laser-Driven Nuclear Fusion Technology
In November 2010, the US’ National Ignition Facility fired the first shot toward a clean energy future. And Europe’s HiPER project will answer the call to arms. Coal, oil and other fossil fuels may or may not have staying power beyond...
Photonics.com, June 2012
Hyperspectral Imaging Gets Stamp of Approval for Food Processing
A technology that evolved from the cloaked secrecy of military satellites and reconnaissance technology is finding its way into poultry- and produce-processing facilities. Hyperspectral imaging holds so much promise across so many applications, and...
Photonics Spectra, June 2012
Interferometer Keeps Optics Shop on Track
Dynamic interferometry allows the National Optical Astronomy Observatory’s optics lab to avoid heavy vibration when the city builds a streetcar line nearby. Sometimes making transit run more smoothly can create a few bumps elsewhere. The...
Photonics Spectra, June 2012
Lasys 2012 to Emphasize Materials Processing
Every two years, the trade fair draws thousands to Stuttgart to discuss new technologies, applications and ideas for laser systems. Innovations and recent developments in laser technology – machines and subsystems, processes and services...
Photonics.com, June 2012
LEDs Lower Costs, Boost Crops Inside Greenhouses
Cooler, longer-lasting and more wavelength-specific than incandescent bulbs, far-red LEDs will be the green future of horticulture. Maximizing food resources in large-scale operations may be the best way to bring sustenance to those without, but...
Photonics Spectra, June 2012
Modeling Improves Fiber Amplifiers and Lasers
Developing active fiber devices based only on experimental tests is highly inefficient, often leading to time-consuming, expensive iterations in the laboratory. Working with a numerical model is the best way to learn how fiber devices work, how to...
Photonics Spectra, June 2012
Quantum Efficiency Advances Sensors for Night Vision
In recent years, low-noise CMOS imaging sensors have triggered many new opportunities and applications for the night-vision market. Although low noise is key, it is not the only parameter to consider when dealing with low-light vision. Sensitivity...
Photonics.com, June 2012
193-nm Lithography Opens Doors for Diffractive Micro-Optics
Design considerations and fabrication affect performance for a near-IR large-angle homogenizer for use in 3-D sensors based on time of flight. The field of diffractive micro-optics is playing an increasingly important role in today’s...
Photonics Spectra, May 2012
Hitting Every Angle with Autostereoscopic 3-D Displays
Clever use of electro-optics, lens arrays, diffusers and software advances the multidimensional way of seeing The broad field of autostereoscopic display – the creation of imagery that appears three-dimensional without requiring the use of...
Photonics Spectra, May 2012
Time Delay Integration Speeds Up Imaging
Using a sensor architecture that permits photoelectrons generated from multiple exposures to be summed with no additive noise enables high-speed imaging under light-starved conditions. This technology has become a standard in the automated...
Photonics Spectra, May 2012
Vision Software Enables NASA Robonaut to See
The first robotic visitor to the International Space Station performs difficult visual and tactile tasks in service to the human crew. The first humanoid robot astronaut boarded the International Space Station (ISS) in August 2011. Mission STS-133...
Photonics Spectra, May 2012
Wafer-Etching Process Brightens Future for LEDs
With far higher etch rates and per-unit cost savings, high-temperature wet etching of sapphire wafers is giving dry etching a run for its money. LED manufacturers today can choose between two very different manufacturing processes. Dry etching...
Photonics Spectra, May 2012
Connected and Smarter, Cameras Keep Watch
Digital network cameras are increasingly coming into play for surveillance and security applications. Fading fast are the days of closed-circuit television, yesterday’s video surveillance staple that displays the output of analog cameras on...
Photonics Spectra, April 2012
Conscripting Terahertz Sensors
Imaging and spectroscopy in the terahertz frequency range eventually will give troops a welcome advantage in the field. Terahertz waves are short enough to provide resolution of less than 1 mm, yet long enough to penetrate most nonmetallic...
Photonics Spectra, April 2012
Defense, Security Show Targets Baltimore
SPIE moves its DSS conference and trade show to the Charm City to maximize exposure to governmental agencies, military institutions and research organizations. At the mention of Baltimore, certain things come to mind: crab cakes, the Orioles, Camden...
Photonics Spectra, April 2012
How to Evaluate a Measurement Application’s Requirements
Precision noncontact metrology application factors can seem complicated, especially when 3-D or multispectral measurements are involved. Here’s how to ensure a robust and otherwise optimized metrology solution for your application. The...
Photonics Spectra, April 2012
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