Sensor Systems

doi:10.1117/3.651915.ch1

Sensor Systems

Book: Thermal Infrared Characterization of Ground Targets and Backgrounds, Second Edition

Author(s): Pieter A. Jacobs

Published: 2006

https://doi.org/10.1117/3.651915.ch1

Author Affiliations +

Abstract

Active systems in their simplest form are used in the typical setup shown in Fig. 1.1. A source directly illuminates the target and the reflected radiation is detected. Although many kinds of active sources can be used, most active systems use a part of the EM spectrum, such as light sources (including lasers) and radar. Radar systems can be active or passive, and can be subdivided into the following operational spectral bands.