Français
1. Principle of laser imaging
1.1 General physical principles
Distance measurement using 3D LiDAR imagery is based on the time it takes for a wave to travel from its point of emission to an object, plus the time it takes to travel back to its acquisition point. Given that c is the speed of light, 299,792,458 m.s -1 (approximately 30 cm.ns –1 ), in air, measuring the travel time, Δt, enables us to directly deduce the object's distance R: R = c . Δt / 2.
This chapter describes the general physical principles of 3D laser imaging, and readers wishing to know more can refer to
The Ultimate Scientific and Technical Reference
This article is included in
Mechanical and dimensional measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Principle of laser imaging
Simulator
Bibliography
Software tools
LiDAR scene modeling tools :
DART:
http://www.cesbio.ups-tlse.fr/us/dart/dart_model.html
DIRSIG :
Non-exhaustive list of 3D point cloud exploitation...
Websites
Airborne Ladar Imaging Research Testbed (ALIRT) developed by Massachusetts Institute of Technology/Lincoln Lab (MIT/LL) https://www.ll.mit.edu//publications/technotes/TechNote_ALIRT.pdf
SPL (Single Photon Lidar) airborne LIDAR developed by Sigma Space Corporation (
Events
International Lidar Mapping Forum (ILMF) :
Standards and norms
- Laser safety – Part 1: Equipment classification and requirements - IEC 60825-1 - 2014
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Detector manufacturers :
ASC :
http://www.advancedscientificconcepts.com/products/overview.html
VOXTEL :
The Ultimate Scientific and Technical Reference
