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.
Presence of systematic and random error in the 3D printed lenses. The top row (a) shows lens A_02, where all lenses have a similar error profile at different rotational angles. The bottom row (b) shows lens B_01, where the leftmost lens has a different surface error profile than the middle and right lenses. Thus, some error in the manufacturing process is random.
