Chinese Optics Letters, 2016, 14 (12): 120901, Published Online: Aug. 2, 2018
Increased depth of focus in random-phase-free holographic projection Download: 831次
090.1705 Color holography 090.1760 Computer holography 090.2870 Holographic display 090.5694 Real-time holography
Abstract
The recently proposed random-phase-free method enables holographic reconstructions with very low noise, which allows fine projections without time integration of sub-holograms. Here, we describe the additional advantage of this method, namely, the extended depth of sharp imaging. It can be attributed to a lower effective aperture of the hologram section forming a given image point at the projection screen. We experimentally compare the depth of focus and imaging resolution for various defocusing parameters in the cases of the random-phase method and the random-phase-free method. Moreover, we discuss the influence of the effective aperture in the presence of local obstacles in the hologram’s plane.
Michal Makowski, Tomoyoshi Shimobaba, Tomoyoshi Ito. Increased depth of focus in random-phase-free holographic projection[J]. Chinese Optics Letters, 2016, 14(12): 120901.