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