Tag: without

New “Metalens” Shifts Focus Without Moving – Enables Miniature Zoom Lenses for Drones, Cellphones, or Night-Vision Goggles

A new MIT-fabricated metalens shifts focus without tilting, shifting, or otherwise moving. The design may enable miniature zoom lenses for drones, cellphones, or night-vision goggles. Credit: Courtesy of the researchers Polished glass has been at the center of imaging systems for centuries. Their precise curvature enables lenses to focus light and produce sharp images, whether […]

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Researchers Warn: At Least 50% of COVID-19 Infections Are Transmitted by People Without Symptoms

Analysis of spring New York City outbreak finds asymptomatic cases make up at least 80% of COVID-19 cases. A new study out of the University of Chicago has found that during the initial wave of the COVID-19 outbreak in New York City, only between one in five and one in seven cases of the virus […]

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