3D LiDAR Imaging in Obscurants

3D LiDAR Imaging in Obscurants Philip Church Ph.D. Neptec Technologies Corporation Copyright 2014 © Neptec Technologies Corp. All rights reserved. 1...
2 downloads 2 Views 2MB Size
3D LiDAR Imaging in Obscurants Philip Church Ph.D. Neptec Technologies Corporation

Copyright 2014 © Neptec Technologies Corp. All rights reserved.

1

Outline • LiDAR Overview • Physics of light interaction with obscurants • OPAL LiDAR technology for the penetration of Degraded Visual Environments (DVE) • DVE penetration performance examples • Field tests examples • Conclusions

Copyright 2014 © Neptec Technologies Corp. All rights reserved.

2

LiDAR Overview Time-of-Flight LiDAR Principle of Operation • •



• •

A pulse of light is emitted. The reflection of that pulse is detected and the time-of-flight ‘t’ is measured. Using the speed of light c, the delay can be converted into a distance R. 𝑐𝜏 𝑅= 2 Knowing the position and orientation of the sensor, the XYZ coordinate of the reflective surface can be calculated. Main Components:

– Pulsed laser – Detector – Mechanism to steer the beam within a designated Field-Of-View

Copyright 2014 © Neptec Technologies Corp. All rights reserved.

3

The DVE Problem

Example of a LiDAR signal in clear conditions

Example of a LiDAR signal in DVE conditions

Copyright 2014 © Neptec Technologies Corp. All rights reserved.

4

Physics of Light Interaction with Obscurants Wavelength versus particle size: 𝒓≪𝝀 𝐴 = 𝑄𝜋𝑟 2 ≪ 𝜋𝑟 2 A: Effective particle cross-section blocking the light Q: Scattering efficiency r: Particle radius For r

Suggest Documents