Hacker News Reader

Were those dining hall scanners using a palm-on-glass technology, or mid-air like what Amazon is showing?

My college used mid air finger print scanners. It scanned all 4 finger prints and would let you pass even if you had a bandaid over one.

Mid-air, exactly like Amazon's

I would love to see a picture of one.

Their product uses visual light to take the 3D scan (hence the green glow) but their patent filings cover a lot of related scanning techniques.