Abstract

Previously, we have proposed a lensless coherent imaging using a nonholographic and noniterative phase-retrieval method that allows the reconstruction of a complex-valued object from a single diffraction intensity measured with an aperture-array filter. The proof-of-concept experiment of this method has been demonstrated under the Fresnel diffraction approximation. In applications to microscopy, however, the measurement of the diffraction intensity with high numerical aperture beyond the Fresnel approximation is required to obtain the object information at high spatial resolution. Thus we have also presented an extension procedure to apply the method to the cases beyond the Fresnel approximation by means of computer simulations. Here the effectiveness of the procedure is demonstrated by the experiments, in which the reconstruction with about 10 times the resolution of our previous experiment has been achieved and the object information in depth direction has been retrieved.

© 2013 Optical Society of America

Lensless coherent imaging by a deterministic phase retrieval method with an aperture-array filter

Nobuharu Nakajima
J. Opt. Soc. Am. A 25(3) 742-750 (2008)

Phase retrieval from a high-numerical-aperture intensity distribution by use of an aperture-array filter

Nobuharu Nakajima
J. Opt. Soc. Am. A 26(10) 2172-2180 (2009)

Lensless imaging from diffraction intensity measurements by use of a noniterative phase-retrieval method

Nobuharu Nakajima
Appl. Opt. 43(8) 1710-1718 (2004)

Noniterative approach to the missing data problem in coherent diffraction imaging by phase retrieval

Nobuharu Nakajima
Appl. Opt. 49(21) 4100-4107 (2010)

Phase retrieval from diffraction intensities by use of a scanning slit aperture

Nobuharu Nakajima
Appl. Opt. 44(29) 6228-6234 (2005)