An official website of the United States government
Here's how you know
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.
Correction for chromatic aberration-induced image distortion. (A) The region of interest on the imaging standard. (B–C) The difference maps between two wavelengths of 510 nm and 674 nm (B) before distortion correction and (C) after distortion correction.