Metalenses move forward...

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Metalenses move forward...

#1  Postby Macdoc » Feb 13, 2018 4:12 am

Hybrid optics bring color imaging using ultrathin metalenses into focus
February 12, 2018, University of Washington

Image
The UW team's metalens consists of arrays of tiny pillars of silicon nitride on glass which affect how light interacts with the surface. Depending on the size and arrangement of these pillars, microscopic lenses with different properties can be designed. A traditional metalens (top) exhibits shifts in focal length for different wavelengths of light, producing images with severe color blur. The UW team's modified metalens design (bottom), however, interacts with different wavelengths in the same manner, generating uniformly blurry images which enable simple and fast software correction to recover sharp and in-focus images. Credit: Shane Colburn/Alan Zhan/Arka Majumdar

Read more at: https://phys.org/news/2018-02-hybrid-op ... s.html#jCp


The UW team's metalens consists of arrays of tiny pillars of silicon nitride on glass which affect how light interacts with the surface. Depending on the size and arrangement of these pillars, microscopic lenses with different properties …more
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require lenses made of a new array of materials.
In a paper published Feb. 9 in Science Advances, scientists at the University of Washington announced that they have successfully combined two different imaging methods—a type of lens designed for nanoscale interaction with lightwaves, along with robust computational processing—to create full-color images.


Read more at: https://phys.org/news/2018-02-hybrid-op ... s.html#jCp


Yet the total thickness of their imaging system is 200 micrometers, which is about 2,000 times thinner than current cellphone cameras.



:what: another photographic revolution in the works :coffee:
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EO Wilson in On Human Nature wrote:
We are not compelled to believe in biological uniformity in order to affirm human freedom and dignity.
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Re: Metalenses move forward...

#2  Postby SkyMutt » Feb 14, 2018 2:38 am

No kidding. In addition to the advance you've noted, Eric Fossum, the inventor of the CMOS image sensor chip used in digital cameras has invented a new one that's much more sensitive.
Serious, but not entirely serious.

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