New research by Tel Aviv University will allow cameras to recognize colors that cannot be perceived by the human eye and even ordinary cameras.
This technology allows to visualize gases and substances such as hydrogen, carbon and sodium, each with a unique color in the infrared spectrum, as well as biological compounds found in nature but ̵6;invisible’. are ‘with the naked eye or with a normal camera. It has groundbreaking applications in a wide range of fields from computer gaming and photography to security, medicine, and astronomy.
The research was conducted by Dr. Michael Mrejen, Yoni Erlich, Dr. Assaf Levanon and Professor Haim Suchowski of TAU’s Department of Condensed Materials Physics. The results of the study were published on the October 2020 issue of Reviews on Laser & Photonics.
“The human eye receives photons at wavelengths between 400 nanometers and 700 nanometers – between the wavelengths of blue and red,” explains Dr. Mrejen. “But that’s only a very small part of the electromagnetic spectrum, including radio waves, microwaves, X-rays and more. Below 400 nanometers there is ultraviolet or UV radiation, and over 700 nanometers have radiation. Infrared, itself is divided into near infrared, medium and far infrared.
“In each of these parts of the electromagnetic spectrum, there is a lot of information about materials encoded as ‘colors’ that have so far been obscured from view.”
The researchers explain that colors in these parts of the spectrum are of great importance, as many materials with their own characteristics are represented as colors, especially in the medium infrared range. For example, cancer cells can be easily detected because they have a higher molecular concentration of a certain type.
Current infrared detection technologies are very expensive and it is almost impossible to render those ‘colors’. In medical imaging, experiments have been performed in which infrared images are converted into visible light to identify cancer cells by molecules. Up until now, this conversion required very complicated and expensive cameras, not necessarily for general use.
But in their research, the TAU researchers were able to develop a cheap and efficient technology that could be mounted on a standard camera and allowed to convert light photons from the entire pink region for the first time. outboard to the visible region, at frequencies. that the human eye and standard camera can recognize.
Professor Suchowski explained: “Humans can see between red and blue. If we can see in the infrared, we will see that elements like hydrogen, carbon and sodium have one. single color “. “So an environmental monitoring satellite can ‘see’ a pollutant emitted from a factory, or a spy satellite will know where the explosives or uranium are hidden. night. “
After patenting their invention, the researchers were developing the technology through a grant from the Innovation Agency’s KAMIN project, and they met with a number of companies based in Israel and international.
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Michael Mrejen et al, Multi-Color Timing – Acquisition images resolved by converting the total trailer frequency, Reviews on Laser & Photonics (Year 2020). DOI: 10.1002 / lpor.202000040
Provided by Tel Aviv University
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