A Lidar Model for a Rough-Surface Target

Method of Partial Coherence

Olga Korotkova, L. C. Andrews, R. L. Phillips

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Renewed interest in the propagation characteristics of a partially coherent beam has led to several recent studies that have extended theoretical developments started in the 1970s and 1980s. In this paper we use a model developed by the authors for single-pass propagation of a partially coherent beam and extend it to the case of a Gaussian-beam wave reflected from a finite rough-surface reflecting target. This model can be modeled as a random phase screen (or diffuser) in front of a smooth finite reflector. The target acts like a deep random phase screen for the case of a fully diffuse surface and becomes a continually weakening phase screen as the target surface become smoother. We present mathematical models for the mutual coherence function (MCF) and the scintillation index of the reflected Gaussian-beam wave in the presence of atmospheric turbulence. This analysis includes partial and fully developed speckle from the target. From the normalized MCF, estimates are given for the speckle size in the pupil plane and image plane as a function of transmitted beam wave characteristics, size and roughness of the target, and size of the receiver-collecting lens. Expressions for the scintillation index are valid under weak-to-strong fluctuation conditions and are shown to agree with well-known results in limiting cases of a fully diffuse target and a smooth reflector.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJ.D. Gonglewski, K. Stein
Pages49-60
Number of pages12
Volume5237
DOIs
StatePublished - 2004
Externally publishedYes
EventOptics in Atmospheric Propagation and Adaptive Systems VI - Barcelona, Spain
Duration: Sep 9 2003Sep 12 2003

Other

OtherOptics in Atmospheric Propagation and Adaptive Systems VI
CountrySpain
CityBarcelona
Period9/9/039/12/03

Fingerprint

Optical radar
optical radar
Gaussian beams
Scintillation
Speckle
Atmospheric turbulence
scintillation
reflectors
Lenses
Surface roughness
Mathematical models
beam leads
propagation
diffusers
atmospheric turbulence
reflected waves
pupils
mathematical models
roughness
receivers

Keywords

  • Atmospheric optics
  • Laser radar
  • Partial coherence
  • Rough target
  • Scintillation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Korotkova, O., Andrews, L. C., & Phillips, R. L. (2004). A Lidar Model for a Rough-Surface Target: Method of Partial Coherence. In J. D. Gonglewski, & K. Stein (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5237, pp. 49-60) https://doi.org/10.1117/12.515086

A Lidar Model for a Rough-Surface Target : Method of Partial Coherence. / Korotkova, Olga; Andrews, L. C.; Phillips, R. L.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / J.D. Gonglewski; K. Stein. Vol. 5237 2004. p. 49-60.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Korotkova, O, Andrews, LC & Phillips, RL 2004, A Lidar Model for a Rough-Surface Target: Method of Partial Coherence. in JD Gonglewski & K Stein (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 5237, pp. 49-60, Optics in Atmospheric Propagation and Adaptive Systems VI, Barcelona, Spain, 9/9/03. https://doi.org/10.1117/12.515086
Korotkova O, Andrews LC, Phillips RL. A Lidar Model for a Rough-Surface Target: Method of Partial Coherence. In Gonglewski JD, Stein K, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 5237. 2004. p. 49-60 https://doi.org/10.1117/12.515086
Korotkova, Olga ; Andrews, L. C. ; Phillips, R. L. / A Lidar Model for a Rough-Surface Target : Method of Partial Coherence. Proceedings of SPIE - The International Society for Optical Engineering. editor / J.D. Gonglewski ; K. Stein. Vol. 5237 2004. pp. 49-60
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