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Instantaneous 3D imaging of flame species using coded laser illumination

Kristensson, Elias LU ; Li, Zheming LU ; Berrocal, Edouard LU ; Richter, Mattias LU and Aldén, Marcus LU (2017) In Proceedings of the Combustion Institute2000-01-01+01:00 36(3). p.4585-4591
Abstract

Three-dimensional (3D) imaging of dynamic objects that rapidly undergoes structural changes, such as turbulent combusting flows, has been a long-standing challenge, mainly due to the common need for sequential image acquisitions. To accurately sense the 3D shape of the sample, all acquisitions need to be recorded within a sufficiently short time-scale during which the sample appears stationary. Here we present a versatile diagnostic method, named Frequency Recognition Algorithm for Multiple Exposures (FRAME) that enables instantaneous 3D imaging. FRAME is based on volumetric laser sheet imaging but permits several layers to be probed parallel in time and acquired using a single detector. To differentiate between the signals arising from... (More)

Three-dimensional (3D) imaging of dynamic objects that rapidly undergoes structural changes, such as turbulent combusting flows, has been a long-standing challenge, mainly due to the common need for sequential image acquisitions. To accurately sense the 3D shape of the sample, all acquisitions need to be recorded within a sufficiently short time-scale during which the sample appears stationary. Here we present a versatile diagnostic method, named Frequency Recognition Algorithm for Multiple Exposures (FRAME) that enables instantaneous 3D imaging. FRAME is based on volumetric laser sheet imaging but permits several layers to be probed parallel in time and acquired using a single detector. To differentiate between the signals arising from the different layers FRAME incorporates a line-coding strategy, in which each laser sheet is given a unique spatial intensity modulation. Although the signal from all laser sheets overlap in the spatial domain, this line-coding approach makes them separated in the frequency domain where they can be accessed individually by means of digital filtering. Here we demonstrate this method by studying laser-induced fluorescence from formaldehyde in a flame and present 3D images of the flame topology, instantaneously acquired.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coded imaging, Instantaneous imaging, Structured illumination, Three-dimensional imaging
in
Proceedings of the Combustion Institute2000-01-01+01:00
volume
36
issue
3
pages
4585 - 4591
publisher
Elsevier
external identifiers
  • scopus:84991819441
  • wos:000393412600141
ISSN
1540-7489
DOI
10.1016/j.proci.2016.08.040
language
English
LU publication?
yes
id
837c9223-16c5-4d10-b138-6d02a491b041
date added to LUP
2017-02-17 12:11:13
date last changed
2018-07-08 04:21:30
@article{837c9223-16c5-4d10-b138-6d02a491b041,
  abstract     = {<p>Three-dimensional (3D) imaging of dynamic objects that rapidly undergoes structural changes, such as turbulent combusting flows, has been a long-standing challenge, mainly due to the common need for sequential image acquisitions. To accurately sense the 3D shape of the sample, all acquisitions need to be recorded within a sufficiently short time-scale during which the sample appears stationary. Here we present a versatile diagnostic method, named Frequency Recognition Algorithm for Multiple Exposures (FRAME) that enables instantaneous 3D imaging. FRAME is based on volumetric laser sheet imaging but permits several layers to be probed parallel in time and acquired using a single detector. To differentiate between the signals arising from the different layers FRAME incorporates a line-coding strategy, in which each laser sheet is given a unique spatial intensity modulation. Although the signal from all laser sheets overlap in the spatial domain, this line-coding approach makes them separated in the frequency domain where they can be accessed individually by means of digital filtering. Here we demonstrate this method by studying laser-induced fluorescence from formaldehyde in a flame and present 3D images of the flame topology, instantaneously acquired.</p>},
  author       = {Kristensson, Elias and Li, Zheming and Berrocal, Edouard and Richter, Mattias and Aldén, Marcus},
  issn         = {1540-7489},
  keyword      = {Coded imaging,Instantaneous imaging,Structured illumination,Three-dimensional imaging},
  language     = {eng},
  number       = {3},
  pages        = {4585--4591},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute2000-01-01+01:00},
  title        = {Instantaneous 3D imaging of flame species using coded laser illumination},
  url          = {http://dx.doi.org/10.1016/j.proci.2016.08.040},
  volume       = {36},
  year         = {2017},
}