Chinese Optics Letters, 2016, 14 (7): 070901, Published Online: Aug. 3, 2018
Fast reconstruction of digital holograms for extended depths of field Download: 844次
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.
P. W. M. Tsang, T.-C. Poon, T. Kim, Y. S. Kim. Fast reconstruction of digital holograms for extended depths of field[J]. Chinese Optics Letters, 2016, 14(7): 070901.