L² CMOS IMAGE SENSOR FOR LOW LIGHT VISION
Pierre Fereyre, Frédéric Devrière, Stéphane Gesset, Marie Guillon, Thierry Ligozat, Frédéric Mayer, Gareth Powell, Vincent Prevost, Frédéric Ramus, Olivier Seignol
e2v semiconductors, France
The paper talks about 1/1.8-inch 1.3MP imager for night vision applications. Among other things, the paper shows rarely published nightglow spectrum:
Yes, I scoured the www looking for this data a couple of years ago but could find only day time data. Thanks for posting.
ReplyDeleteSorry this is commun knowledge and CAN be fond in man y publiques matériels!
ReplyDeleteTrue, it's common knowledge and publicly open. Still, it's hard to find in free open access sources.
ReplyDeleteIf you have another link to free source of night glow spectrum, please post it.
Will fin d one and post it latéral...
ReplyDeleteIt strikes me that there's something shady about this graph. At 700 nm, the night-glow-only figure is slightly more than 1e7. The figure for night-glow plus 0.25 moon-glow is almost 5e7, suggesting that 0.25 moon-glow is about 4e7, 0.5 moon-glow is about 8e7, and 1.0 moon-glow is about 16e7. However, the actual figures in the graph are for night-glow plus 0.5 moon-glow around 15e7 and for night-glow plus 0.89 moon-glow more than 40e7.
ReplyDeleteIn any event, I'm somewhat skeptical about the low-light part of low-light imaging. A lot of applications (the bulk even?) are in security and defense, where the environment might not have a lot of ambient visible light, but is usually chock full of active infrared sources (bodies, engine blocks, heat shadows, et cetera). So it seems as if you can hit a low-light home run just by going to a sensor that can tap some of the not-very-low-light IR spectrum.
Okay, I used up my low-light pun and am in the dark when it comes to thinking up another one. Or not. :D