Tiny pinholes in thin film could pave the way for 3-D holographic displays

phys.org | 1/24/2019 | Staff
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Researchers in Korea have designed an ultrathin display that can project dynamic, multi-colored, 3-D holographic images, according to a study published in Nature Communications.

The system's critical component is a thin film of titanium filled with tiny holes that precisely correspond with each pixel in a liquid crystal display (LCD) panel. This film acts as a 'photon sieve,' whereby each pinhole diffracts light emerging from it widely, resulting in a high-definition 3-D image observable from a wide angle.

System - LCD - Panel - Resolution - Titanium

The entire system is very small: it comprises a 1.8-inch off-the-shelf LCD panel with a resolution of 1024 x 768. The titanium film, attached to the back of the panel, is a mere 300 nanometres thick.

"Our approach suggests that holographic displays could be projected from thin devices, like a cell phone," says Professor YongKeun Park, a physicist at KAIST who led the research. The team demonstrated their approach by producing a hologram of a moving, tri-coloured cube.

Images

Specifically, the images are made by pointing differently coloured...
(Excerpt) Read more at: phys.org
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