Increased depth of focus in random-phase-free holographic projection

Michał Makowski , Tomoyoshi Shimobaba , Tomoyoshi Ito


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.
Author Michał Makowski (FP / OPD)
Michał Makowski,,
- Optics and Photonics Division
, Tomoyoshi Shimobaba - [Chiba University]
Tomoyoshi Shimobaba,,
, Tomoyoshi Ito - [Chiba University]
Tomoyoshi Ito,,
Journal seriesChinese Optics Letters, ISSN 1671-7694
Issue year2016
ASJC Classification2208 Electrical and Electronic Engineering; 3107 Atomic and Molecular Physics, and Optics; 2504 Electronic, Optical and Magnetic Materials
Languageen angielski
Score (nominal)20
Score sourcejournalList
ScoreMinisterial score = 20.0, 01-01-2020, ArticleFromJournal
Ministerial score (2013-2016) = 20.0, 01-01-2020, ArticleFromJournal
Publication indicators Scopus Citations = 4; WoS Citations = 6; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.786; WoS Impact Factor: 2016 = 1.859 (2) - 2016=1.149 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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