This is made possible thanks to new designs in the optical components used such as the image sensor, allowing Fujitsu to arrive at similar performance levels compared to what they have done in the past, albeit at a far smaller form factor. Fujitsu says, “Palm vein sensors utilize the way blood absorbs near-infrared light. This technology confirms a person’s identity by recognizing patterns from blood vessels, which appear black under near-infrared illumination. What’s important here is, a sensor that used to be 3 cm in size is now just 16 mm square and 5 mm thick. We’re moving ahead with R&D, to enable this sensor to be used in mobile devices that sensors couldn’t be built into before.”
Prototypes have already been made by Fujitsu, although it will still take some time before they have a chance of going mainstream in tablets down the road.