Abstract

Focal imaging using speckle correlography can reconstruct distant objects even with very few returned photons. If the distant object is optically rough, the intensity detected in the far field will be a laser speckle pattern. As shown by idell and Fienup,¹ this speckle intensity pattern can be processed to extract information about the unknown object autocorrelation function. Then the original object can be reconstructed from its autocorrelation by performing a phase retrieval.

© 1988 Optical Society of America