Structured Laser Illumination Planar Imaging: New horizons for the study of spray dynamics, thermometry and droplet sizing
(2016)- Abstract
- The
first reported applications of laser sheet imaging for the study of atomizing sprays date from the mid 1980th.
Since those early tries, blurring effects from the light being scattered multiple times by the surrounding droplets
were already observed and reported. While s trategies in suppressing part of this multiple light scattering
contribution, were known for transmission imaging (e. spatial Fourier filtering, polarization filtering, time gating)
no robust solution was found for laser sheet imaging until the developme nt of Structured Laser Illumination Planar
Imaging ( in 2008.
The
originality of SLIPI resides in using a laser sheet with a spatially modulated light intensity. This light... (More) - The
first reported applications of laser sheet imaging for the study of atomizing sprays date from the mid 1980th.
Since those early tries, blurring effects from the light being scattered multiple times by the surrounding droplets
were already observed and reported. While s trategies in suppressing part of this multiple light scattering
contribution, were known for transmission imaging (e. spatial Fourier filtering, polarization filtering, time gating)
no robust solution was found for laser sheet imaging until the developme nt of Structured Laser Illumination Planar
Imaging ( in 2008.
The
originality of SLIPI resides in using a laser sheet with a spatially modulated light intensity. This light structure
encodes the incident illumination beam which can be then decoded a fter image recording. As multiply scattered
photons have “short memory” they do lose the modulation information while singly scattered photons fully
preserve it. Therefore the two components, single and multiple scattering, can be separated using a demodul ation
post processing algorithm on the recorded images.
This
article is a review of the SLIPI technique from its earliest to latest developments. It describes the traditional way
of applying structured illumination using three modulated sub images and its use for averaged imaging of droplet
sizes, extinction coefficients and spray thermometry. Recently the technique has been adapted for single shot
applications in order to study spray dynamics and liquid breakups. This is performed using two modulated sub
image s instead of three, known as 2p SLIPI, opening new horizons for the study of spray dynamics, single shot
dropl et sizing and thermometry, even through optically dense situations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/a4e9c9f0-7b9e-4581-9969-701ee9e33367
- author
- Berrocal, Edouard LU
- organization
- publishing date
- 2016-07-04
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- host publication
- 18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
- language
- English
- LU publication?
- yes
- id
- a4e9c9f0-7b9e-4581-9969-701ee9e33367
- date added to LUP
- 2020-10-20 09:48:23
- date last changed
- 2020-10-20 13:23:49
@inproceedings{a4e9c9f0-7b9e-4581-9969-701ee9e33367,
abstract = {{The<br/>first reported applications of laser sheet imaging for the study of atomizing sprays date from the mid 1980th.<br/>Since those early tries, blurring effects from the light being scattered multiple times by the surrounding droplets<br/>were already observed and reported. While s trategies in suppressing part of this multiple light scattering<br/>contribution, were known for transmission imaging (e. spatial Fourier filtering, polarization filtering, time gating)<br/>no robust solution was found for laser sheet imaging until the developme nt of Structured Laser Illumination Planar<br/>Imaging ( in 2008.<br/>The<br/>originality of SLIPI resides in using a laser sheet with a spatially modulated light intensity. This light structure<br/>encodes the incident illumination beam which can be then decoded a fter image recording. As multiply scattered<br/>photons have “short memory” they do lose the modulation information while singly scattered photons fully<br/>preserve it. Therefore the two components, single and multiple scattering, can be separated using a demodul ation<br/>post processing algorithm on the recorded images.<br/>This<br/>article is a review of the SLIPI technique from its earliest to latest developments. It describes the traditional way<br/>of applying structured illumination using three modulated sub images and its use for averaged imaging of droplet<br/>sizes, extinction coefficients and spray thermometry. Recently the technique has been adapted for single shot<br/>applications in order to study spray dynamics and liquid breakups. This is performed using two modulated sub<br/>image s instead of three, known as 2p SLIPI, opening new horizons for the study of spray dynamics, single shot<br/>dropl et sizing and thermometry, even through optically dense situations.}},
author = {{Berrocal, Edouard}},
booktitle = {{18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics}},
language = {{eng}},
month = {{07}},
title = {{Structured Laser Illumination Planar Imaging: New horizons for the study of spray dynamics, thermometry and droplet sizing}},
url = {{https://lup.lub.lu.se/search/files/85590001/Lisbon_Berrocal.pdf}},
year = {{2016}},
}