High-speed videography of transparent media using illumination-based multiplexed schlieren
(2022) In Scientific Reports 12(1).- Abstract
Schlieren photography is widely used for visualizing phenomena within transparent media. The technique, which comes in a variety of configurations, is based on detecting or extracting the degree to which light is deflected whilst propagating through a sample. To date, high-speed schlieren videography can only be achieved using high-speed cameras, thus limiting the frame rate of such configurations to the capabilities of the camera. Here we demonstrate, for the first time, optically multiplexed schlieren videography, a concept that allows such hardware limitations to be bypassed, opening up for, in principle, an unlimited frame rate. By illuminating the sample with a rapid burst of uniquely spatially modulated light pulses, a temporally... (More)
Schlieren photography is widely used for visualizing phenomena within transparent media. The technique, which comes in a variety of configurations, is based on detecting or extracting the degree to which light is deflected whilst propagating through a sample. To date, high-speed schlieren videography can only be achieved using high-speed cameras, thus limiting the frame rate of such configurations to the capabilities of the camera. Here we demonstrate, for the first time, optically multiplexed schlieren videography, a concept that allows such hardware limitations to be bypassed, opening up for, in principle, an unlimited frame rate. By illuminating the sample with a rapid burst of uniquely spatially modulated light pulses, a temporally resolved sequence can be captured in a single photograph. The refractive index variations are thereafter measured by quantifying the local phase shift of the superimposed intensity modulations. The presented results demonstrate the ability to acquire a series of images of flame structures at frame rates up to 1 Mfps using a standard 50 fps sCMOS camera.
(Less)
- author
- Ek, Simon LU ; Kornienko, Vassily LU ; Roth, Adrian LU ; Berrocal, Edouard LU and Kristensson, Elias LU
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 12
- issue
- 1
- article number
- 19018
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:36347904
- scopus:85141500000
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-022-23198-6
- language
- English
- LU publication?
- yes
- id
- 271e05e3-43f0-4fe5-96ce-65fa9bf6e61e
- date added to LUP
- 2022-12-05 12:23:38
- date last changed
- 2024-04-18 15:48:58
@article{271e05e3-43f0-4fe5-96ce-65fa9bf6e61e,
abstract = {{<p>Schlieren photography is widely used for visualizing phenomena within transparent media. The technique, which comes in a variety of configurations, is based on detecting or extracting the degree to which light is deflected whilst propagating through a sample. To date, high-speed schlieren videography can only be achieved using high-speed cameras, thus limiting the frame rate of such configurations to the capabilities of the camera. Here we demonstrate, for the first time, optically multiplexed schlieren videography, a concept that allows such hardware limitations to be bypassed, opening up for, in principle, an unlimited frame rate. By illuminating the sample with a rapid burst of uniquely spatially modulated light pulses, a temporally resolved sequence can be captured in a single photograph. The refractive index variations are thereafter measured by quantifying the local phase shift of the superimposed intensity modulations. The presented results demonstrate the ability to acquire a series of images of flame structures at frame rates up to 1 Mfps using a standard 50 fps sCMOS camera.</p>}},
author = {{Ek, Simon and Kornienko, Vassily and Roth, Adrian and Berrocal, Edouard and Kristensson, Elias}},
issn = {{2045-2322}},
language = {{eng}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{High-speed videography of transparent media using illumination-based multiplexed schlieren}},
url = {{http://dx.doi.org/10.1038/s41598-022-23198-6}},
doi = {{10.1038/s41598-022-23198-6}},
volume = {{12}},
year = {{2022}},
}