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Based on the title and opening paragraph, I excitedly thought this would cover the manufacture of the sensor or lenses — you know, the things without which you
by electrograv 9y ago
Based on the title and opening paragraph, I excitedly thought this would cover the manufacture of the sensor or lenses — you know, the things without which you don’t have a camera at all.
Perhaps a more accurate title would be “Salvaging a broken ‘FLIR One’ to make a thermal vision scope!”
Still a very cool project! Too bad it’s not reproducible at this cost though (this was more affordable than commercial products only because the author managed to buy a broken ‘FLIR One’ cheap on eBay, and salvage the sensor).
- anfractuosity 9y agoI have seen projects where people created scanning thermal cameras, repurposing one of those IR thermometers I believe, such as - https://www.youtube.com/watch?v=5v61Kuaxab0 https://www.youtube.com/watch?v=5v61Kuaxab0 As far as I know the sensors used in thermal cameras don't use silicon due to the long IR wavelengths they're detecting and instead use something like InGaAs iirc, so I assume making your own sensor would be very difficult. However possibly you could make your own thermopile array instead - https://en.wikipedia.org/wiki/Thermopile https://en.wikipedia.org/wiki/Thermopile ? I'm not sure how they compare to the sensors normally used though. Edit: Also https://en.wikipedia.org/wiki/Microbolometer https://en.wikipedia.org/wiki/Microbolometer seems like you can use silicon + another layer to handle the IR
- wl 9y agoInGaAs is for near infrared. The long-wave IR used in thermal imaging requires something like vandium oxide.
- anfractuosity 9y agoAh gotcha cheers. I was looking at an InGaAs sensor for around 2um for alcohol measurements a while ago, I didn't realise body heat etc. would require longer still.