Abstract
In the case of high angular resolution techniques (speckle interferometry, long baseline Michelson interferometry), one has studied how varies the signal-to-noise ratio (SNR) in terms of the spectral bandwidth Δλ. For values of Δλ varying from 0 up to 100 nanometers, it is shown that the SNR, contrary to the predictions, has no maximum value. In addition, in the case of the high frequency approximation, the effects of a finite spatial-coherence outer scale, the influence of the turbulence model used and of the “optical energy” of the turbulence on the optimal spectral bandwidth have been analyzed and discussed.
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ZIAD, A., BORGNINO, J., AGABI, A. et al. Optimized spectral bandwidth in high angular resolution imaging effect of a finite spatial-coherence outer scale. Exp Astron 5, 247–268 (1994). https://doi.org/10.1007/BF01583699
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DOI: https://doi.org/10.1007/BF01583699