chapter  3
28 Pages

Lidar Remote Sensing ����������������������������������������������������������������������������������������������������������

BySorin C. Popescu

Laser ranging systems are commonly referred to as “lidar” systems. Lidar is an acronym describing light detection and ranging systems, which are sometimes also referred to as “ladar,” either from laser detection and ranging or from laser radar. A universally accepted

CONTENTS

3.1 Foundations of Laser Theory ............................................................................................. 57 3.1.1 How Is Laser Light Generated? ............................................................................. 59

3.2 Laser Light Properties ......................................................................................................... 59 3.2.1 Coherence of Laser Light ........................................................................................ 59 3.2.2 Laser Wavelength and Spectral Purity .................................................................60 3.2.3 Laser Beam Divergence ...........................................................................................60