Light-Field Sensor for 3D Scene Construction with Unprecedented Angular Resolution
By NUS News (Singapore), May 18, 2023
A large scale angle-sensing structure comprising nanocrystal phospors, a key component of the sensor, illuminated under ultraviolet light.
At the core of the novel light-field sensor are inorganic perovskite nanocrystals—compounds that have excellent optoelectronic properties.
National University of Singapore scientists created a three-dimensional (3D) light-field sensor that can reconstruct scenes with ultra-high angular resolution using a novel angle-to-color conversion framework.
The device features an angular measurement range exceeding 80 degrees, high angular resolution which can potentially be less than 0.015 degrees for smaller sensors, and a 0.002-nanometer-to-550-nanometer spectral response range.
Inorganic perovskite nanocrystals form the heart of the sensor, which can detect 3D light fields across the X-ray to visible light spectrum due to the crystals' controllable nanostructures.
The researchers patterned the crystals onto a transparent thin-film substrate mated to a color charge-coupled device, which transforms incoming optical signals into color-coded output for use in 3D image reconstruction.
Proof-of-concept experiments showed the sensor could accurately reconstruct images of objects 1.5 meters (4.9 feet) away.
From NUS News (Singapore)
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