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 histogram of the measured data by the IR camera for 100 s; unfiltered: (a), (c), and (e); filtered by the signal modulation: (b), (d), and (f), while varying the distance by 6.1 m (20 ft), 12.2 m (40 ft), and 18.3 m (60 ft). (a) 6.1 m (20 ft)/unfiltered; (b) 6.1 m (20 ft)/filtered; (c) 12.2 m (40 ft)/unfiltered; (d) 12.2 m (40 ft)/filtered; (e) 18.3 m (60 ft)/unfiltered; (f) 18.3 m (60 ft)/filtered.
