I seem to remember an early attempt nearly two decades ago..milky plastic...
Just call it a portable scanner.
Any RF and you need a HAM license?
Retro-pages
https://forum.cosmoquest.org/forum/...topic-babbling/3721806-input-on-new-webdesign
Thermal imaging
https://phys.org/news/2021-02-powerful-pocket-sized-optical-imager-longer.pdf
https://phys.org/news/2024-01-metasurfaces-craft-compact-thermal-imaging.amp
https://techxplore.com/news/2023-06-weve-lens-thermal-cameras-spy.amp
a simple filter
https://www.reddit.com/r/oddlysatisfying/comments/1aj3oyy/a_small_filter_making_a_big_difference/
Just call it a portable scanner.
Any RF and you need a HAM license?
Retro-pages
https://forum.cosmoquest.org/forum/...topic-babbling/3721806-input-on-new-webdesign
Thermal imaging
https://phys.org/news/2021-02-powerful-pocket-sized-optical-imager-longer.pdf
https://phys.org/news/2024-01-metasurfaces-craft-compact-thermal-imaging.amp
https://techxplore.com/news/2023-06-weve-lens-thermal-cameras-spy.amp
a simple filter
https://www.reddit.com/r/oddlysatisfying/comments/1aj3oyy/a_small_filter_making_a_big_difference/
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