Figure 4:
Experimental setup: PA, binary pinhole aperture; L, lens; PBS, polarization beam splitter; M, mirror; QWP, quarter wave plate; P, polarizer; CCD, charge-coupled device.
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.