Features of optical image jitter in a random medium with a finite outer scale

Bolbasova, L. A.; Kovadlo, P. G.; Лукин, В. П.; Nosov, V. V.; Torgaev, A. V.

doi:10.1134/s1024856013020061

Cited by 6 publications

(12 citation statements)

References 5 publications

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“…Using the coherence radius of atmospheric turbulence r0 in the form ) even for a ratio of the outer turbulence scale to the receiving aperture size of about 10*3 [21], i.e., the outer scale affects image jitter significantly. An experimental test of the effect of the decrease in optical fluctuations in atmospheric coherent turbulence is of interest.…”

Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

“…Saying about the outer scale one should keep in mind that this parameter changes with the height, i.e., it is necessary to use the information about measured parameters of the model of height profiles of atmospheric turbulence. The possibility to introduce an efficient outer scale as an integral characteristic of turbulence is of great interest as it can permit one to change the height profile for the outer scale [20][21]. One of the reasons to introduce this parameter is that the applicability of the models of height profiles of atmospheric turbulence is restricted due to their dependence on geographical location.…”

Section: Effective Outer Scale Of Turbulence For Imaging Through the mentioning

confidence: 99%

“…Again, by analogy with the calculations in [14,21], the equation of the variance of the jitter of the image center of gravity can be written as…”

Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

“…As one can see, the graphs (D) and (E) are similar in the character of growth and the presence of the maximal value at a certain finite height; so one can study one of the models and generalize the obtained results for the second. We propose two methods [20,21] for determining the effective outer scale, namely, by the discrepancy between structure functions of phase fluctuations and by the saturation level. To determine the effective outer scale by this model, minimization of the integral square discrepancy of structure functions of phase fluctuations telescopes) or Arg(90%), i.e., the argument at which the structure function reaches 90% of the saturation level.…”

Section: Effective Outer Scale Of Turbulence For Imaging Through the mentioning

confidence: 99%

“…Now let us use a so-called effective outer turbulence scale for the atmosphere in general, which can be introduced on the basis of the following equation (see, e.g., [21]): …”

Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

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Features of optical image jitter in a random medium with a finite outer scale

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During a period of more than 30 years we have performed successively investigations of the effect of low-frequency spectral range of atmospheric turbulence on the optical characteristics. The influence of the turbulence models as well as a outer scale of turbulence on the characteristics of telescopes and systems of laser beam formations has been determined too. This question is important in, for example, problems of ground-based astronomy.

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Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

Section: Effective Outer Scale Of Turbulence For Imaging Through the mentioning

confidence: 99%

“…Again, by analogy with the calculations in [14,21], the equation of the variance of the jitter of the image center of gravity can be written as…”

Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

Section: Effective Outer Scale Of Turbulence For Imaging Through the mentioning

confidence: 99%

“…Now let us use a so-called effective outer turbulence scale for the atmosphere in general, which can be introduced on the basis of the following equation (see, e.g., [21]): …”

Section: Effect Of the Outer Turbulent Scale On The Variance Of Imagementioning

confidence: 99%

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Features of optical image jitter in a random medium with a finite outer scale

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Comparison of singular-optical and statistical approaches for investigations of turbulence tasks

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Experimental data of our turbulence measurements (by ultrasonic digital sensors) in the various areas and meteosituations show that large areas are often observed in open atmosphere, in which one large coherent structure has the main influence. Turbulence in such areas is called as coherent. Incoherent Kolmogorov turbulence is detecting, as a rule, on sites with a flat surface. Coherent turbulence differs from Kolmogorov turbulence by the faster decrease of a time spectrum in an inertial interval (f -8/ 3 instead of f -5/ 3 ) and the smaller contribution of the high-frequency components.

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