Fast reconstruction of digital holograms for extended depths of field

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Article number70901
Journal / PublicationChinese Optics Letters
Volume14
Issue number7
Publication statusPublished - 10 Jul 2016

Abstract

Past research has demonstrated that a static, three-dimensional (3D) object scene can be directly recorded as a complex digital hologram. However, numerical reconstruction of the object scene, which may comprise multiple sections located at unknown distances from the hologram, is a complicated and computation-intensive process. To the best of our knowledge, we propose, for the first time, a low complexity method that is capable of reconstructing a complex hologram, such that sections at different depths in the 3D object scene can be automatically reconstructed at the correct focal distances and merged into a single image for an extended depth of field. We demonstrate an order of magnitude increase of the depth of field for binary objects. With the use of a graphical processing unit, the reconstruction of a 512×512 complex hologram can be accomplished in about 100 ms, equivalent to around 10 frames per second.

Citation Format(s)

Fast reconstruction of digital holograms for extended depths of field. / Tsang, P. W M; Poon, T. C.; Kim, T.; Kim, Y. S.

In: Chinese Optics Letters, Vol. 14, No. 7, 70901, 10.07.2016.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review