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.
The wrapped fringes recorded by the ESPI for a pressure step of 0.5 mmHg in both air and PBS. Each image represents the information recorded for one of the four lasers of the ESPI. The images in the top row were obtained by performing the test in PBS, while the 4 images in the bottom row are recorded for the identical test performed in air. Note that the speckle data for these identical deformation tests are significantly different due to the presence of different optical media.
