Accession Number : ADA320833
Title : Beam Spread Induced by Atmospheric Turbulence in a Folded Path,
Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
Personal Author(s) : Yuezhong, Feng ; Zhengfang, Song
PDF Url : ADA320833
Report Date : 27 JAN 1997
Pagination or Media Count : 14
Abstract : On the basis of extended Huygens-Fresnel principle and quadratic approximation, general expressions of the beam spread reflected from a target in a turbulent atmosphere are derived. The properties of reflected beam spread are investigated. It is found that there exist amplification and self compensation of beam spread in the reflection from a mirror and a corner cube reflector, respectively. Calculations show that the spread can be reduced by using a long-wavelength laser as well as large transmitting and reflection radii.
Descriptors : *ATMOSPHERIC MOTION, *LIGHT TRANSMISSION, TURBULENCE, LASER BEAMS, TRANSMITTANCE, OPTICAL ANALYSIS, APPROXIMATION(MATHEMATICS), TRANSLATIONS, REFLECTIVITY, CHINA, CHINESE LANGUAGE.
Subject Categories : Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE