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Test & Measurement Features
Reflecting on the Past
One source rarely considered when addressing photonics issues is our ancestors: Great technological discoveries from many millennia ago may lead to modern day solutions. A recent example of this involves optimizing gold-based infrared reflectors...
Photonics Spectra, September 2009
Multiplexing UV-NIR Spectroscopy Measurements
Optical coating of large areas has become an increasingly important step in materials processing. Achieving the highest possible performance and respective yield from large panes of architectural glass, solar cells and thin-film layers requires...
Photonics Spectra, August 2009
Eliminating Systematic Errors in Cylindrical Surface Measurements
Interferometric metrology is the standard process for topographic measurements in the optical shop environment as well as in quality assurance laboratories. In all interferometric instruments, the tested wavefront is compared with a reference, with...
Photonics Spectra, August 2008
Hot Rockets!
Without a doubt, rocket engines are hot. Variable specific impulse magnetoplasma rockets fire continuously during a mission; therefore, a proper thermal system is needed to dissipate the waste heat and maintain a stable steady-state operating...
Photonics Spectra, August 2008
All IR Cameras Are Not Created Equal
As media saturation spreads in the Western world, it is almost impossible to go anywhere without seeing some kind of a camera. This increase in camera use is highly evident in the infrared and night-vision market. However, it is important to note...
Photonics Spectra, February 2004
Display Measurement: Measure What You See
Significant advances in display technology have been made in recent years, creating new market opportunities and applications. Liquid crystal and thin-film transistor displays are commonly integrated into motor vehicles and aircraft cockpits. They...
Photonics Spectra, May 2000
Computer Disks Require Precision Measurements
In 1996, Seagate Technology shipped 26.8 percent of the world's hard disk drives, according to DISK/TREND. Company officials say process automation has been one of the company's keys to competitive success, and photonics is a major factor in quality...
Photonics Spectra, August 1997
Objective Measurements Improve Imaging Optics
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, December 1996
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