IEEE Sensors publishes a presentation "X-Ray Detection Using Single Photon Avalanche Diodes" by Anthony Bulling and Ian Underwood from University of Edinburgh, UK:
Another interesting presentation "Outdoor RGB-D Mapping Using Intel-RealSense" by Gayan Brahmanage and Henry Leung from University of Calgary, Canada demonstrates advantages of stereo depth sensing in sunlight.
The author completely misses to compare the technology against state-of-the-art direct X-ray detection and to point out the actual benefit of using SPADs. Xray spectroscopy with direct X-ray detection isn't new and conventional approaches yield a spectrogram within only one integration period where here, as count rates are used (instead of charge count) repetitive measurements are required. This looks like a classic case of - "just because you can do it doesn't mean you should do it"...
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