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Interesting I didn't think it could be done. From that I understand normal thermal cameras can't have a silicon CCD and need to be actively cooled.
by dhughes 14y ago
Interesting I didn't think it could be done.
From that I understand normal thermal cameras can't have a silicon CCD and need to be actively cooled.
- icegreentea 14y agoActively cooled IR sensors can achieve higher resolution and accuracy, but ambient temperature IR sensors have been around for a while. As long as the incident IR can drive the sensor element away from ambient temperature, then you can have sensing.
- klodolph 14y agoIR sensors don't work by detecting heat changes. They convert infrared photons directly to electrical current. Now I don't actually know jack about IR sensors, but I would assume that increased temperature means increased noise, as it does with visible-light CCDs. People refrigerate visible-light CCDs too, for taking low-noise astronomical photos.