Related Experiment Video
Updated: May 17, 2026

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
Published on: March 31, 2022
Holographic background-oriented schlieren
None:
Simultaneous measurement of dispersed and continuous phases in multiphase flows remains a fundamental challenge. This Letter proposes holographic background-oriented schlieren (HoloBOS), and it enables numerical refocusing of both the background pattern and dispersed-phase particles from a single acquisition, thereby allowing simultaneous characterization of both phases. The method is demonstrated in a gas flame experiment with an effective distance of 45 mm and is further applied to a multiphase propellant combustion plume to characterize dispersed agglomerates and flow structures. The results support the feasibility of HoloBOS for the simultaneous extraction of particle morphology, size, and three-dimensional position, as well as the line-of-sight integral of the refractive-index gradient in the continuous phase, indicating its potential as a practical tool for complex multiphase diagnostics.
Related Concept Videos
Phase Contrast and Differential Interference Contrast Microscopy
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Confocal Fluorescence Microscopy
Gestalt Principles of Perception

