Enhanced backscattering from a plane mirror viewed through a turbulent phase screen

Agrovskii, B. S.; Bogaturov, A. N.; Gurvich, A. S.; Kireev, Stanislav; Myakinin, V. A.

doi:10.1364/josaa.8.001142

Cited by 14 publications

(7 citation statements)

References 9 publications

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“…In order to investigate the effect of coherent properties of the viewed object on the image formation, we shall consider two typical cases a <<p , a <<L/kp (4) C S ob sp and << a , a << L/kp (5) sp C ob sp It is clear that such objects as a point reflector or optically rough surfaces are described by (4) and objects with mirror surfaces are described by ( 5 ) Taking into account that a aOb one can see that In the further consideration we shall assume that the condition q << 1 is valid In order to simplify the notations in further formulae, we shall characterize the distance Y from the lens to the filter plane by parameter R (hR 1/y -1/F) and shall express the spatial coordinates of the filter plane as angular" coordinates V i-P 'I)), and u, ,i.e R+F bI R+L I…”

Section: Probl Formulationmentioning

confidence: 99%

“…Taking into account this SPIE Vol. 1968 Atmospheric Propagation and Remote Sensing 11(1993) / 273 circumstance and condition q << 1, one can see that in (11) it is possible to assume that eipUkp(2p/(R+L)-V)} = I since for objects (4,5) a characteristic value of argument of this exponent is much smaller than I . Therefore, for these objects the general expression (11) may be rewritten as follows…”

Section: Probl Formulationmentioning

confidence: 99%

“…Using (13) it is straightforward to obtain the spatial spectrum of the average image for objects (4,5) in the form…”

Section: Probl Formulationmentioning

confidence: 99%

“…Therefore, for objects (4,5) it is possible to simplify expressions (14) assuming either that (,i÷,) = '1(O,i÷,) in case (4) or that rOb(p) = 1 in case (5). Further, under conditions (17) one can assume that in (14) erp(-Lk} = I since 1kVP.L < 1.…”

Section: Probl Formulationmentioning

confidence: 99%

“…=e.rp{-2j' [H + (L-) (+ )) +H +. (L-)]]} Substituting (25) into(14) we obtain the expression for the function function rb(o,v) for objects(4,5)atdifferent locations of the spatial filter and of the function rld(V+,V) for object (4) are presented on theFig.3. Analogous curves Td for object(5) would be close to curves 3,4 ofFig.3 so they are not shown.…”

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confidence: 99%

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<title>Imaging of partially coherent object through a randomly inhomogeneous medium using spatial filtering</title>

Bogaturov

1993

Atmospheric Propagation and Remote Sensing II

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The possibility of improving the image quality of a reflecting object, viewed through a randomly inhomogeneous medium is theoretically investigated. Three cases of coherent illumination of the object are considered: illumination by unperturbed wave, illumination and viewing through d I f ferent inhomogene it ie s o f a med ium , i1 lum mat ion and viewing through the same inhomogeneities (double passage imaging) . It is shown that, when the fluctuations of the intensity in the plane of the receiving lens aperture are strong, the use of a suitable spatial filter always gives an improvement of the average image for the object, correlation scale of which is larger than coherence radius of a spherical wave propagating in the medium. For the object, correlation scale of which is smaller than coherence radius of a spherical wave, the spatial filtering gives an improvement of the image only for the case of double passage imaging.

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