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Singular Photonics Emerges from Stealth with Portfolio of SPAD-based Image Sensors


News provided by

Singular Photonics

23 Jan, 2025, 13:06 GMT

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Startup introduces range of sensors with layers of advanced computation to extract valuable information from images.

EDINBURGH, Scotland, Jan. 23, 2025 /PRNewswire/ -- Singular Photonics emerged from stealth mode today, launching a new generation of image sensors based on single photon avalanche diodes (SPADs). A spin-out from the University of Edinburgh lab of digital imaging pioneer Professor Robert Henderson, Singular is one of the first companies to bring advanced computation to SPAD-based image sensing, enabling in-pixel and cross-pixel storage and computations at the lowest light levels to reveal previously invisible details of the material world and its photon events.

The company will showcase its products for the first time at next week's SPIE Photonics West event in San Francisco.

SPADs use the "avalanche" effect in semiconductors to convert light directly into an electrical current, without the need for cooling or amplification. While most commercial SPAD-based image sensors have been limited to time-resolved counting of photons, Singular's core innovation lies in complex layers of computation beneath 3D-stacked SPAD sensors, comparable to the way FPGAs and GPUs revolutionized parallel computing by conducting high-speed, localized processing.

Prof Henderson leads the University of Edinburgh's CMOS Sensors and Systems Group. In 2005, he designed one of the first SPAD image sensors in nanometer CMOS technologies, leading to the first time-of-flight sensors in 2013, which today perform an autofocus-assist feature in more than a billion smartphones worldwide.

"There can be no doubt that SPAD sensors are the future of digital imaging, but their use to date in commercial devices hasn't extended much beyond time-resolved counting of photons," said Prof Henderson. "Computational cleverness can be the difference. We are building next-generation imaging sensors, where the computation is done digitally at the pixel level – exactly where the photons arrive."

Simultaneously capturing depth and temporal dimensions to generate 4D images that provide deep, data-rich insights, Singular's noiseless sensors enable more information to be extracted from light, supporting applications ranging from consumer and automotive electronics to the scientific and medical fields. The company's approach transforms SPAD sensors into 3D stacked computational engines capable of performing a wide range of sophisticated tasks, such as real-time photon counting, timing, and advanced processing techniques, including in-pixel histograms, statistical analysis and autocorrelation.

Singular is launching with two sensors, both of which are available today:

  • Andarta, developed in collaboration with tech giant Meta, has a miniature form factor combined with high sensitivity, and is optimized for use in a number of medical imaging modalities. The sensor supports multiple modes of operation including in-pixel autocorrelation measurements, and represents a significant step closer to SPAD integration in the wearables space. For example, Andarta enables monitoring of the rate of cerebral blood flow, monitoring rapid fluctuations in light as it passes through tissue, at depths not currently possible with current sensors.
  • Sirona, the company's first product, is a 512 pixel SPAD-based line sensor capable of time-correlated single photon counting (TCSPC) and enabling Raman spectroscopy, fluorescence lifetime imaging microscopy (FLIM), time-of-flight, and quantum applications. With on-chip histogramming and time binning capability, the sensor has the potential to revolutionize spectroscopy applications.

Singular has already inked multiple deals for its sensors with some of the world's leading instrumentation companies, and expects to announce more collaborations in 2025.

"We are in a unique position where we already have commercially available products and are generating revenue in our first year of incorporation," said Shahida Imani, CEO of Singular Photonics. "With new, even more advanced sensors coming to the market in 2025, we are well positioned to lead the SPAD-driven imaging revolution."

About Singular Photonics

Singular Photonics is developing the next generation of image sensors based on single photon avalanche diodes (SPADs) for a wide range of applications. A spin-out from the lab of digital imaging pioneer Robert Henderson, Professor of Electronic Imaging at the University of Edinburgh, Singular is one of the first companies to bring advanced computation to SPAD-based image sensing. Simultaneously capturing depth and temporal dimensions to generate 4D images that provide deep, data-rich insights, Singular's sensors enable the world to extract more information from light. www.singularphotonics.com

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