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) Effective PSF simulation of 2D SW-TIRF for directions N = 0, 1, 2, 3, and 4. N = 0 corresponds to the conventional TIRF. Anisotropy of PSF decreases as N increases (N: number of scan directions). (B) Comparison of the PSF profile in the thinnest and the thickest directions. All the other cross sectional profiles lie between these two profiles for corresponding N. Simulation condition: NA = 1.45, α = 1.0, 
n = 1.52, 
(or fringe period = 190 nm).
