4.6 Article

Reconstruction of in-line holograms: combining model-based and regularized inversion

期刊

OPTICS EXPRESS
卷 27, 期 10, 页码 14951-14968

出版社

OPTICAL SOC AMER
DOI: 10.1364/OE.27.014951

关键词

-

类别

资金

  1. French National Research Agency (ANR) (LABEX PRIMES of Universite de Lyon) [ANR-11-LABX-0063]
  2. French National Research Agency (ANR) (Investissements d'Avenir) [ANR-11-IDEX-0007]
  3. Region Auvergne-Rhones-Alpes (project DIAGHOLO)

向作者/读者索取更多资源

In-line digital holography is a simple yet powerful tool to image absorbing and/or phase objects. Nevertheless, the loss of the phase of the complex wavefront On the sensor can be critical in the reconstruction process. The simplicity of the setup must thus be counterbalanced by dedicated reconstruction algorithms, such as inverse approaches, in order to retrieve the object from its hologram. In the case of simple objects for which the diffraction pattern produced in the hologram plane can he modeled using few parameters, a model fitting algorithm is very effective. However, such an approach fails to reconstruct objects with more complex shapes, and an image reconstruction technique is then needed. The improved flexibility of these methods comes at the cost of a possible loss of reconstruction accuracy. In this work, we combine the two approaches (model fitting and regularized reconstruction) to benefit from their respective advantages. The sample to be reconstructed is modeled as the sum of simple parameterized objects and a complex-valued pixelated transmittance plane. These two components jointly scatter the incident illumination, and the resulting interferences contribute to the intensity On the sensor. The proposed hologram reconstruction algorithm is based on alternating a model fitting step and a regularized inversion step. We apply this algorithm in the context of fluid mechanics, where holograms of evaporating droplets are analyzed. In these holograms, the high contrast fringes produced by each droplet tend to mask the diffraction pattern produced by the surrounding vapor wake. With our method, the droplet and the vapor wake can he jointly reconstructed. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据