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.
(a)The normalized PSD Ψ is shown, where the dashed lines indicate the back-scattered frequencies for visible light illumination. (b) Ewald representation of back-scattered frequency space with NAi of 0.55 and NAc of 1.49. Colored region depicts wavelengths 500–700nm for planar illumination, while greyed region incorporates the response from the entire NAi.
