FIG. 12.
Polar plots of the frequency corresponding to the maximum amplitude of each radial profile of the 2D NPS. (a) ROI B with large bowtie; (b) ROI C with small bowtie. The units of the frequency are [mm−1].
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.