title: Coherent diffraction imaging by moving a lens.
abstract: A moveable lens is used for determining amplitude and phase on the object plane. The extended fractional Fourier transform is introduced to address the single lens imaging. We put forward a fast algorithm for the transform by convolution. Combined with parallel iterative phase retrieval algorithm, it is applied to reconstruct the complex amplitude of the object. Compared with inline holography, the implementation of our method is simple and easy. Without the oversampling operation, the computational load is less. Also the proposed method has a superiority of accuracy over the direct focusing measurement for the imaging of small size objects.
authors.forename: Cheng
authors.initials: C
authors.lastname: Shen
authors.forename: Jiubin
authors.initials: J
authors.lastname: Tan
authors.forename: Ce
authors.initials: C
authors.lastname: Wei
authors.forename: Zhengjun
authors.initials: Z
authors.lastname: Liu