New Technology Enables Cameras to Capture Colors Invisible to the Human Eye

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Tel Aviv University breakthrough has functions in most cancers detection, safety and even gaming.

New analysis from Tel Aviv University will enable cameras to acknowledge colours that the human eye and even abnormal cameras are unable to understand.

The expertise makes it doable to picture gases and substances akin to hydrogen, carbon and sodium, every of which has a singular shade within the infrared spectrum, in addition to organic compounds which are present in nature however are “invisible” to the bare eye or abnormal cameras. It has groundbreaking functions in a wide range of fields from laptop gaming and images in addition to the disciplines of safety, drugs, and astronomy.

The analysis was carried out by Dr. Michael Mrejen, Yoni Erlich, Dr. Assaf Levanon and Prof. Haim Suchowski of TAU’s Department of Physics of Condensed Material. The outcomes of the examine have been revealed within the October 2020 difficulty of Laser & Photonics Reviews.

“The human eye picks up photons at wavelengths between 400 nanometers and 700 nanometers — between the wavelengths of blue and red,” explains Dr. Mrejen. “But that’s solely a tiny a part of the electromagnetic spectrum, which additionally consists of radio waves, microwaves, X-rays and extra. Below 400 nanometers there’s ultraviolet or UV radiation, and above 700 nanometers there’s infrared radiation, which itself is split into near-, mid- and far-infrared.

“In each of these parts of the electromagnetic spectrum, there is a great deal of information on materials encoded as ‘colors’ that has until now been hidden from view.”

Prism Rainbow

The researchers clarify that colours in these elements of the spectrum are of nice significance, since many supplies have a singular signature expressed as a shade, particularly within the mid-infrared vary. For instance, most cancers cells may very well be simply detected as they’ve the next focus of molecules of a sure sort.

Existing infrared detection applied sciences are costly and largely unable to render these “colors.” In medical imaging, experiments have been carried out during which infrared pictures are transformed into seen mild to establish the most cancers cells by the molecules. To date, this conversion required very subtle and costly cameras, which weren’t essentially accessible for common use.

But of their examine, TAU researchers have been in a position to develop low-cost and environment friendly expertise that would mount on a normal digital camera and permits, for the primary time, the conversion of photons of sunshine from your complete mid-infrared area to the seen area, at frequencies that the human eye and the usual digital camera can choose up.

“We humans can see between red and blue. If we could see in the infrared realm, we would see that elements like hydrogen, carbon and sodium have a unique color,” explains Prof. Suchowski. “So an environmental monitoring satellite could ‘see’ a pollutant being emitted from a plant, or a spy satellite would see where explosives or uranium are being hidden. In addition, since every object emits heat in the infrared, all this information could be seen even at night.”

After registering a patent for his or her invention, the researchers are growing the expertise by way of a grant from the Innovation Authority’s KAMIN undertaking, they usually have already met with various each Israel-based and worldwide firms.

Reference: “Multicolor Time‐Resolved Upconversion Imaging by Adiabatic Sum Frequency Conversion” by Michael Mrejen, Yoni Erlich, Assaf Levanon and Haim Suchowski, 20 August 2020, Laser & Photonics Reviews.
DOI: 10.1002/lpor.202000040



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