Abstract

A new self-reference holographic technique that permits unambiguous reconstruction of the object image from its lensless Fourier-transform holograms is described.¹ It can be used for obtaining high-resolution images of laser-illuminated objects with one or more strong glints. The principle of this technique is as follows: An object is illuminated several times (the exact number depends on the reconstruction algorithm used) by different nonuniform beams. The beam nonuniformity must be known in the object plane. Holograms formed with individual beams are detected and Fourier transformed separately. By coding the object reflectivity with nonuniform illumination, the overlapping images can be separated. Different algorithms for image reconstruction are possible and are discussed. Signal-to-noise analysis for these algorithms as well as laboratory demonstration of the technique are described.

© 1988 Optical Society of America