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huh, TIL the barcode scanner bit
> The sapphire windows are used in both high-pressure and vacuum chambers for spectroscopy, crystals in various watches, and windows in grocery-store barcode scanners, since the material's exceptional hardness and toughness makes it very resistant to scratching.
en.wikipedia.org/wiki/Sapphire
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@nyanotech apple invested a shitload of money into making iPhone screens out of sapphire and it never went further than the fancier watches :(
@cinebox i got curious after a different website offhandedly mentioned that some military helicopters have sapphire windows for bullet resistance
@nyanotech that doesn’t sound right since I think it’s fairly brittle