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free-space optics Features
Holographic Combiners Improve Head-Up Displays
Combiners are semitransparent surfaces used in head-up display (HUD) and augmented reality (AR) systems to overlay an image presented by a projector on top of the viewer’s physical world. The combiner is transparent and lets the viewer see...
Photonics Spectra, May 2019
Data Demands Drive Free-Space Optics
Light-based options promise to pick up where radio-frequency technology leaves off. In wireless communications, things are getting crowded. Growing data demands are bumping up against radio frequency capacity. In response, researchers and companies...
Photonics Spectra, February 2013
Optics in Space
The origins of free-space optical communications can be traced back to the late 19th century, with the introduction of Alexander Graham Bell’s “photophone” and the optical telegraph. Both of these technologies went the way of the daguerreotype, but...
Photonics Spectra, November 2009
Compact Telescope Design Suited to Military and Commercial Applications
Most applications that use telescopes opt for one of two designs: the Gregorian or the Cassegrain. Of these two, the latter is most often used. A new telescope that improves on the Gregorian hopes to challenge that with a design that has...
Photonics Spectra, September 2004
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