Aperture Averaging Of Optical Scintillations Based On A Spectrum With High Wave-Number Bump

    Authors

    E. L. Bass; B. D. Lackovic;L. C. Andrews

    Comments

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    Abbreviated Journal Title

    Opt. Eng.

    Keywords

    ATMOSPHERIC OPTICS, APERTURE AVERAGING; OPTICAL SCINTILLATIONS; ATMOSPHERE; MODEL; Optics

    Abstract

    Analytic expressions are obtained for the aperture-averaging factor associated with optical scintillations of unbounded plane waves and spherical waves in the weak fluctuation regime. This analysis is based an a modified spectrum of refractive-index fluctuations that features inner scale and a high wave number bump. Asymptotic results for both small- and large-aperture receivers compared with the first Fresnel radius (L/k)(1/2) are used to construct simple interpolation formulas, which are generally within 5% of exact numerical-integration values in the case of a plane wave and within 12% of exact values for a spherical wave. On comparison with published experimental data on spherical waves, we found similar agreement, with maximum error 8%.

    Journal Title

    Optical Engineering

    Volume

    34

    Issue/Number

    1

    Publication Date

    1-1-1995

    Document Type

    Article

    Language

    English

    First Page

    26

    Last Page

    31

    WOS Identifier

    WOS:A1995QB57800005

    ISSN

    0091-3286

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