Abstract

Most of the analytical scintillation models used by experts to simulate the illumination performances of active imaging systems are based on the use of monochromatic, punctual, and coherent sources. These analytical models seem pessimistic regarding lightpipe-based illumination techniques. Outdoor trials have been made with 1.57 μm laser illuminators with and without lightpipe to record illumination maps and associated refractive index structure parameter Cn2 with a propagation distance of 1 km. Analysis shows a reduction of the scintillation by a factor of 2.5 comparing analytical models and laser illumination with lightpipe.

© 2014 Optical Society of America

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References

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2012

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

2007

1999

1966

D. L. Fried, J. Opt. Soc. Am. A 56, 1372 (1966).
[CrossRef]

Alhabash, M. A.

Andrews, L. C.

Christnacher, F.

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

Espinola, R. L.

Fried, D. L.

D. L. Fried, J. Opt. Soc. Am. A 56, 1372 (1966).
[CrossRef]

Halford, C. E.

Hopen, C. Y.

Jacobs, E. L.

Kravtsov, Y.

S. Rytov, Y. Kravtsov, and V. Tatarskii, “Principles of statistical radiophysics,” in Wave Propagation through Random Media IV (Springer-Verlag, 1960).

Laurenzis, M.

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

Lutz, Y.

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

Matwyschuk, A.

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

Phillips, R. L.

Poyet, J.-M.

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

Rytov, S.

S. Rytov, Y. Kravtsov, and V. Tatarskii, “Principles of statistical radiophysics,” in Wave Propagation through Random Media IV (Springer-Verlag, 1960).

Tatarskii, V.

S. Rytov, Y. Kravtsov, and V. Tatarskii, “Principles of statistical radiophysics,” in Wave Propagation through Random Media IV (Springer-Verlag, 1960).

Tofsted, D. H.

Vollmerhausen, R.

J. Opt. Soc. Am. A

Opt. Eng.

M. Laurenzis, Y. Lutz, F. Christnacher, A. Matwyschuk, and J.-M. Poyet, Opt. Eng. 51, 061302 (2012).
[CrossRef]

Opt. Express

Proc. SPIE

M. Laurenzis, J.-M. Poyet, Y. Lutz, A. Matwyschuk, and F. Christnacher, Proc. SPIE 8542, 854203 (2012).

Other

S. Rytov, Y. Kravtsov, and V. Tatarskii, “Principles of statistical radiophysics,” in Wave Propagation through Random Media IV (Springer-Verlag, 1960).

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Figures (4)

Fig. 1.
Fig. 1.

Measurement assembly for recording illumination maps.

Fig. 2.
Fig. 2.

Laser illuminator designs with and without lightpipe.

Fig. 3.
Fig. 3.

Illumination maps (left) with and (right) without lightpipe for a Cn2 of 1.25·1014m2/3 (effective circle diameter of 400 mm).

Fig. 4.
Fig. 4.

Theoretical and measured scintillation indexes depending on Cn2 measurements.

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

β02=0,5Cn2k(76)L(116);k=2π/λ,
σI2=e0,49β02/(1+0,56β02(65))(76)+0,51β02/(1+0,69β02(65))(56)1.
σI2=I(x,y)2/I(x,y)21.
I(x,y)=(Ir(x,y)Ns)/Ir(x,y)Ns.

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