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) Image of 1951 resolution target imaged through the objective showing the full field (5 mm) with red box indicating the higher resolution features. (B) Close up of resolution target with red box indicating the highest resolution features. (C) Close up of the highest resolved features, with the ability to resolve group 8, element 4 in red box.
