I think that’s fairly low tech. Something like it could have been built hundreds of years ago (with human operators orienting the 63 heliostats to make them ref

I think that’s fairly low tech. Something like it could have been built hundreds of years ago (with human operators orienting the 63 heliostats to make them reflect the sun’s light into the parabolic part) https://en.wikipedia.org/wiki/Mirror#Middle_Ages_and_Renaissance https://en.wikipedia.org/wiki/Mirror#Middle_Ages_and_Renaiss...: “by the 16th century Venice was a center of mirror production using this technique. These Venetian mirrors were up to 40 inches (100 cm) square.” And those were mirrors for reflecting images. The mirrors for a device like this need not be as good.