Image Formation by Means of Spatial Intensity Correlations
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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There are a number of special benefits from detecting images by the technique of intensity correlation. 1 The method is relatively insensitive to the effects of atmospheric scintillation. 2 Because the signal is detected in the spatial-transform domain, high-frequency detail about the scattering surface translates to large spatial lags in the far field. This result could be particularly important at frequencies where detector resolution is not well developed. 3 A special advantage to intensity interferometry in the spatial domain is the utilization of guassian statistics in the spatial not temporal sense. By this method, sources with non-gaussian time statistics such as single-axial-mode lasers can be utilized. 4 Still another advantage of spatial detection is that images of moving surfaces can be formed using brief exposures.