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Home NEWS Science News Chemistry

INRS researchers design the world’s fastest UV camera

Bioengineer by Bioengineer
October 8, 2020
in Chemistry
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An international team of researchers succeeded in recording photons in the ultraviolet range in real time

IMAGE

Credit: Jinyang Liang: Single?Shot Ultraviolet Compressed Ultrafast Photography. Laser & Photonics Reviews, 2020, volume 14, Cover of Issue 10. Copyright Wiley-VCH GmbH. Reproduced with permission.

The team of Professor Jinyang Liang, a specialist in ultrafast imaging at the Institut national de la recherche scientifique (INRS), in collaboration with an international team of researchers, has developed the fastest camera in the world capable of recording photons in the ultraviolet (UV) range in real time. This original research is featured on the front cover of the 10th issue of the journal Laser & Photonics Reviews.

Compressed ultrafast photography (CUP) captures the entire process in real time and unparalleled resolution with just one click. The spatial and temporal information is first compressed into an image and then, using a reconstruction algorithm, it is converted into a video.

Developing a Compact Instrument for UV

Until now, this technique was limited to visible and near-infrared wavelengths, and thus to a specific category of physical events. “Many phenomena that occur on very short time scales also take place on a very small spatial scale. To see them, you need to sense shorter wavelengths. Doing this in the UV or even X-ray ranges is a remarkable step toward this goal,” says Jinyang Liang, who led the study.

To record in this new range of wavelengths and to develop the technique into a user-friendly product, researchers designed a compact UV-CUP system with Christian?Yves Côté of Axis Photonique Inc. via an academia-industry collaboration. The new system features a patterned photocathode, which is used to simultaneously detect and encode “black light”. “Like a standard camera, our technology is passive. It does not produce light; it receives it. Therefore, our photocathode had to be sensitive to the photons emitted as UV light. This design makes our technique a stand-alone system that can be easily integrated into various experimental platforms,” says Jinyang Liang, who has been contributing to the development of CUP since his postdoctorate.

Liang worked with François Légaré, also an INRS professor, to generate and take images of UV pulses at the Advanced Laser Light Source (ALLS) laboratory. “The outstanding research environment at the Énergie Matériaux Télécommunications Research Centre of INRS is very helpful. It is so much more efficient when all necessary design, manufacturing, and characterization capabilities are available in the same building.”

Dividing up the Reconstruction Problem

“Taking the picture is only the first half of the job,” says Jinyang Liang. “It also has to be reconstructed.” To do this, the researchers developed a new algorithm, more efficient than standard algorithms, via their collaboration with Boston University. Its strength comes from a division of tasks. “Rather than solve the reconstruction problem as a lump, the algorithm divides the reconstruction into smaller problems that it tackles individually,” explains Professor Liang.

With the innovations in both hardware and software, UV-CUP has an imaging speed of 0.5 trillion frames per second. It produces videos with 1500 frames in large format. As a light-speed imager, UV-CUP sees flying UV photons in real time. “It always fascinates me when you can watch the fastest object in the universe in such great detail,” says Yingming Lai, a Master’s student at INRS and the first author of the article.

The device developed through this international collaboration will be sent to the research laboratory SOLEIL Synchrotron in France to visualize physical phenomena. It could capture laser-plasma generation, a phenomenon that is essential for deducing certain properties of materials, and UV fluorescence, which is important in medical imaging to identify biomarkers linked to diseases.

###

About the Study

Researchers received funding from the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canada Foundation for Innovation (CFI), the Fonds de recherche du Québec – Nature et technologies (FRQNT), the Fonds de recherche du Québec – Santé (FRQS), and the National Science Foundation (NSF).

About INRS

INRS is a university dedicated exclusively to graduate level research and training. Since its creation in 1969, INRS has played an active role in Quebec’s economic, social, and cultural development and is ranked first for research intensity in Quebec and second in Canada. INRS is made up of four interdisciplinary research and training centres in Quebec City, Montreal, Laval, and Varennes, with expertise in strategic sectors: Eau Terre Environnement, Énergie Matériaux Télécommunications, Urbanisation Culture Société, and Armand-Frappier Santé Biotechnologie. The INRS community includes more than 1,400 students, postdoctoral fellows, faculty members, and staff.

Contact :

Audrey-Maude Vézina

Service des communications de l’INRS

418 254-2156

[email protected]

Media Contact
Audrey-Maude Vezina
[email protected]

Original Source

https://inrs.ca/en/news/inrs-researchers-design-the-worlds-fastest-uv-camera/

Related Journal Article

http://dx.doi.org/10.1002/lpor.202000122

Tags: Algorithms/ModelsAtomic/Molecular/Particle PhysicsChemistry/Physics/Materials SciencesDiagnosticsMedicine/HealthOpticsParticle PhysicsSoftware EngineeringTechnology/Engineering/Computer Science
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