The reconstruction of a complex-valued object from intensity measurements in the Fresnel zone region is considered. The reconstruction is based on the phase-retrieval method from Fresnel zone intensity data obtained by modulation of the object with a known Gaussian function and with its shifted functions along the horizontal and the vertical directions in rectangular coordinates. Two types of reconstruction system are presented. In the two systems a Gaussian amplitude filter and a Gaussian illuminating beam are used as the known Gaussian functions. Computer-simulated examples in two dimensions illustrate the performance of the reconstruction in these systems.
© 1998 Optical Society of America
Original Manuscript: February 24, 1998
Published: September 10, 1998
Nobuharu Nakajima, "Phase retrieval from Fresnel zone intensity measurements by use of Gaussian filtering," Appl. Opt. 37, 6219-6226 (1998)