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.
SHG images of thin section (∼10 μm) of Achilles tendon. (a) Forward image. (b) Backward image with thin film of PBS (Fresnel reflection is important at the PBS-air interface). (c) Backward image with a thick column (5 cm) of PBS on top of the sample (the contribution of Fresnel reflection is suppressed).
