The standard method of stellar speckle interferometry, in which short exposure photographs are individually analyzed, is not the most general method of extracting object information from the time-varying image intensity. We introduce a space-time analysis in which both spatial and temporal fluctuations are taken into account; the aim is to measure the power spectrum of the image with an increased signal to noise ratio. Surprisingly, our more general space-time analysis does not yield an improved signal to noise ratio at very low light levels.
© 1980 Optical Society of America
K. A. O’Donnell and J. C. Dainty, "Space-time analysis of photon-limited stellar speckle interferometry," J. Opt. Soc. Am. 70, 1354-1361 (1980)