Figure 10.
Dual wavelength photoplethysmography imaging device: bottom view of the imaging system-camera and light sources (a) and the whole device with vacuum pillow supporting the palm (b) [46].
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.