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Updated: Aug 5, 2025

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Published on: February 8, 2014

Multi-Depth Computer-Generated Hologram Based on Stochastic Gradient Descent Algorithm with Weighted Complex Loss

Jiale Quan¹, Binbin Yan¹, Xinzhu Sang¹

¹State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.

|March 29, 2023

Summary

This study introduces a novel method for generating multi-depth phase-only holograms using stochastic gradient descent (SGD) and masked diffraction. The technique effectively reduces occlusion and improves hologram reconstruction accuracy.

Keywords:

gradient descent holographic display mask weighted complex loss function

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Last Updated: Aug 5, 2025

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Area of Science:

Optics and Photonics
Computer Vision
Computational Imaging

Background:

Generating multi-depth holograms presents challenges due to wave diffusion and occlusion between layers.
Existing methods struggle to accurately reconstruct 3D scenes with multiple depth layers.

Purpose of the Study:

To propose a novel method for generating multi-depth phase-only holograms.
To address occlusion issues in multi-layer wave propagation.
To enhance hologram reconstruction accuracy using a weighted complex loss function.

Main Methods:

Utilizing stochastic gradient descent (SGD) algorithm for optimization.
Implementing a masked multi-layer diffraction technique to mitigate occlusion.
Employing a weighted complex loss function analyzing real, imaginary, and amplitude parts of the focus region.

Main Results:

The proposed masked diffraction effectively reduces occlusion between different depth layers.
The weighted complex loss function improves the accuracy of hologram reconstruction by minimizing interference from defocus regions.
Simulations and experimental results validate the method's effectiveness.

Conclusions:

The developed method successfully generates multi-depth phase-only holograms.
Masked diffraction and weighted complex loss are effective solutions for occlusion and reconstruction accuracy.
This approach offers a promising advancement in holographic display and 3D scene reconstruction.