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.
(a) Contrast decay of fringe pattern of the spatial period of Tg = 0.43, 0.85, 1.71, 3.42 µm as a function of the defocus (distance from focal plane). (b) Normalized intensity of SLI and TPLSM as a function of the normalized defocus unit.