Single-Shot On-Axis Fizeau Polarization Phase-Shifting Digital Holography for Complex-Valued Dynamic Object Imaging

Hanzi Liu,Xingpeng Du,Vinu R V,Ziyang Chen,Hongliang Ren,Jixiong Pu

doi:10.3390/photonics9030126

Abstract

Digital holography assisted with inline phase-shifting methods has the benefit of a large field of view and a high resolution, but it is limited in dynamic imaging due to sequential detection of multiple holograms. Here we propose and experimentally demonstrate a single-shot phase-shifting digital holography system based on a highly stable on-axis Fizeau-type polarization interferometry. The compact on-axis design of the system with the capability of instantaneous recording of multiple phase-shifted holograms and with robust stability features makes the technique a novel tool for the imaging of complex-valued dynamic objects. The efficacy of the approach is demonstrated experimentally by complex field imaging of various kinds of reflecting-type static and dynamic objects. Moreover, a quantitative analysis on the robust phase stability and sensitivity of the technique is evaluated by comparing the approach with conventional phase-shifting methods. The high phase stability and dynamic imaging potential of the technique are expected to make the system an ideal tool for quantitative phase imaging and real-time imaging of dynamic samples.

Highlights

The applied domains of digital holography (DH) have an urge of interest in recent times with advancements in high resolution image sensors and modulators with potential applications in the areas of interferometry, microscopy, quantitative phase imaging (QPI), three-dimensional (3D) imaging, ultra-fast imaging, imaging through scattering medium, ghost imaging, etc. [1,2,3,4,5,6,7,8]
Phase-shifting digital holography (PSDH) has its full potential in 3D complex field image reconstruction, the sequential multiple recording of the holograms limits the execution of the system in dynamic object imaging
We propose and experimentally demonstrate a single-shot on-axis phase-shifting digital holography system that utilizes a Fizeau-type polarization interferometry technique for complex-valued dynamic object imaging

Summary

Introduction

The applied domains of digital holography (DH) have an urge of interest in recent times with advancements in high resolution image sensors and modulators with potential applications in the areas of interferometry, microscopy, quantitative phase imaging (QPI), three-dimensional (3D) imaging, ultra-fast imaging, imaging through scattering medium, ghost imaging, etc. [1,2,3,4,5,6,7,8]. Phase-shifting digital holography (PSDH) has its full potential in 3D complex field image reconstruction, the sequential multiple recording of the holograms limits the execution of the system in dynamic object imaging. We propose and experimentally demonstrate a single-shot on-axis phase-shifting digital holography system that utilizes a Fizeau-type polarization interferometry technique for complex-valued dynamic object imaging. The technique makes use of the parallel phase-shifting approach with space division multiplexing for the development of high-speed instantaneous recording of multiple phase-shifted holograms. This is realized by using the combination of a quarter wave plate (QWP) and a micro polarizer array with different orientations encoded in the polarized camera to detect polarized light fields from the Fizeau polarization system. A quantitative analysis is performed to evaluate the phase stability and sensitivity of the system in comparison with conventional phase-shifting methods

Principles and Methods

Experimental Design

Complex-Valued and Dynamic Object Imaging

Quantitative Analysis of System Stability and Sensitivity