Salt-grain-sized camera can produce crisp high-definition images
An article from TechWatch Edition 10
The system relies on a technology called a ‘metasurface’. Metasurfaces are thin two-dimensional metamaterial layers that allow or inhibit the propagation of electromagnetic waves.
In this application, the metasurface comprises 1.6 million cylindrical posts and can be produced much like a computer chip, on a space 0.5 millimetres wide. These posts are carefully designed to bend light in just the right manner so that the array, as a whole, shapes the entire optical wave front. A key advancement was the development of a model to efficiently approximate the metasurfaces’ image production capabilities.
Using machine learning-based algorithms, the posts’ interactions with light combine to produce crisp, high-definition colour images that are comparable with a traditional lens set-up 500,000 times larger in volume. The camera could be applied to medical imaging within the human body, or providing small robots with better vision. It has even been suggested that thousands of these sensors could turn a whole surface (like the back of a mobile phone) into one giant camera.
Source: Princeton University
Enjoyed this article? Read more just like this in our quarterly TechWatch magazine. Subscribe free today here.
04 May 2023
How Test & Evaluation is carried out in other sectors: by QinetiQ & SIA Partners
03 May 2023
Early Careers Leadership event
02 May 2023
World IP Day 2023: Women and Intellectual Property
26 Apr 2023
24 Apr 2023