3 ms·
Most likely not. SPADs are good for detecting single photons (I have designed electronics for this), but to quench the pixel after every detection you need sign
by IndrekR 3y ago
Most likely not. SPADs are good for detecting single photons (I have designed electronics for this), but to quench the pixel after every detection you need significant dead-time for the pixel. Single pixel needs to be an array here, size of which defines the dynamic range of the pixel. Each element within the pixel can not be much smaller than the wavelength to be detected. That means you need significant array of arrays to do any meaningful imaging — sensor will be very large.
- anfractuosity 3y agoWhen you say quench the pixel after every detection, is that after every single photon? I just came across this - https://petapixel.com/2023/04/03/canons-new-sensor-enables-long-range-night-vision-capabilities/ https://petapixel.com/2023/04/03/canons-new-sensor-enables-l... which sounds interesting.
- IndrekR 3y agoThank you for that! Indeed the world has moved on since last time I worked with SPADs (2011). Canon progress you linked seems to be outlined well in several articles published by Kazuhiro Morimoto. Most importantly 3D-stacking the pixel readout with back side illumiation and getting rid of discrete "multiplication wells" which undergo avalanche independently.