Aero-optics at shorter wavelengths
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Authors
Fuhs, Allen E.
Subjects
Lasers, Laser Turrets, Laser Propagation, Turbulence
Advisors
Date of Issue
1980-03
Date
1980-03
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Using the optical system equation, the impact of a change in wavelength is determined. The rms phase variation at output aperture is critical and must be reduced by an amount equivalent to reduction in wavelength. If turret size is scaled with wavelength, the distortion due to the inviscid flow remains constant. Decreased wavelength offers the flexibility of greatly reduced turret weight, volume, and aerodynamic drag. Multiple turrets become feasible on an aircraft. The distortion due to the turbulent boundary layer becomes magnified by reduction of wavelength; however, if the turbulent boundary layer originates on the turret and if the turret is scaled, the boundary layer thickness decreases. Distortion becomes less significant in this case
Type
Technical Report
Description
Series/Report No
Department
Aeronautics
Identifiers
NPS Report Number
NPS-67-80-003
Sponsors
Prepared for: Air Force Weapons Laboratory/ARLB, Kirtland Air Force Base, NM, 87117.
Funder
MIPR # 80-MP-084
Format
v, 23 p. : ill. ; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.