5 ms·
The IR source is easy, but how whould they have done the imaging? All IR sensors I know are semiconductor based, clearly not a option at this time.
by sonium 11y ago
The IR source is easy, but how whould they have done the imaging? All IR sensors I know are semiconductor based, clearly not a option at this time.
- polotics 11y agoThis is an interesting subject. Lead Sulphide, according to: http://antonirogalski.com/wp-content/uploads/2012/12/History-of-infrared-detectors.pdf http://antonirogalski.com/wp-content/uploads/2012/12/History...
- madaxe_again 11y agoPhotomultiplier, at a wild guess - the technology was perfected by '37. No semiconductors needed. https://en.wikipedia.org/wiki/Photomultiplier#First_photomultiplier.2C_single-stage_.28early_1934.29 https://en.wikipedia.org/wiki/Photomultiplier#First_photomul...