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.
An integrating sphere with a matte white coating ensures optimal lighting conditions. The LEDs are located at the rim of the sphere. The image acquisition is performed by a CCD camera mounted at the top of the sphere.
