Advanced

Evaluation of optical arrangements for ballistic imaging in sprays

Rahm, Mattias; Paciaroni, Megan; Wang, Zhenkan LU ; Sedarsky, David and Linne, Mark (2015) In Optics Express 23(17). p.22444-22462
Abstract
This work investigates the imaging performance, in terms of contrast and resolution, of two different time-gated ballistic imaging setups commonly used in spray research. It is shown that the two setups generate similar spatial resolution in the presence of scattering media. The simpler (2f) setup, however, is less sensitive to component misalignments and time-gate induced aberrations than the commonly used (4f) system. Measurements comparing both arrangements indicated slightly higher contrast for the 2f system under the densest conditions for small scatterers. Subsequent computational modeling confirmed the observed tolerance of the 2f system to misalignment and gate effects. The best performing setup was also compared experimentally to... (More)
This work investigates the imaging performance, in terms of contrast and resolution, of two different time-gated ballistic imaging setups commonly used in spray research. It is shown that the two setups generate similar spatial resolution in the presence of scattering media. The simpler (2f) setup, however, is less sensitive to component misalignments and time-gate induced aberrations than the commonly used (4f) system. Measurements comparing both arrangements indicated slightly higher contrast for the 2f system under the densest conditions for small scatterers. Subsequent computational modeling confirmed the observed tolerance of the 2f system to misalignment and gate effects. The best performing setup was also compared experimentally to its non-time-gated shadow-imaging equivalent, to establish when the time-gate enhances imaging performance. It is shown that the time-gated setup generates higher contrast under almost all of the scattering conditions tested, while the non-time-gated setup generates higher spatial resolution only in the lower scatterer size range at the lowest scatterer concentrations. (C) 2015 Optical Society of America (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
23
issue
17
pages
22444 - 22462
publisher
OSA
external identifiers
  • wos:000362418300080
  • scopus:84957548334
ISSN
1094-4087
DOI
10.1364/OE.23.022444
language
English
LU publication?
yes
id
0a4cbc22-8551-470c-8be4-c96967f6aae8 (old id 8220493)
date added to LUP
2015-11-30 07:51:25
date last changed
2017-01-01 05:51:18
@article{0a4cbc22-8551-470c-8be4-c96967f6aae8,
  abstract     = {This work investigates the imaging performance, in terms of contrast and resolution, of two different time-gated ballistic imaging setups commonly used in spray research. It is shown that the two setups generate similar spatial resolution in the presence of scattering media. The simpler (2f) setup, however, is less sensitive to component misalignments and time-gate induced aberrations than the commonly used (4f) system. Measurements comparing both arrangements indicated slightly higher contrast for the 2f system under the densest conditions for small scatterers. Subsequent computational modeling confirmed the observed tolerance of the 2f system to misalignment and gate effects. The best performing setup was also compared experimentally to its non-time-gated shadow-imaging equivalent, to establish when the time-gate enhances imaging performance. It is shown that the time-gated setup generates higher contrast under almost all of the scattering conditions tested, while the non-time-gated setup generates higher spatial resolution only in the lower scatterer size range at the lowest scatterer concentrations. (C) 2015 Optical Society of America},
  author       = {Rahm, Mattias and Paciaroni, Megan and Wang, Zhenkan and Sedarsky, David and Linne, Mark},
  issn         = {1094-4087},
  language     = {eng},
  number       = {17},
  pages        = {22444--22462},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Evaluation of optical arrangements for ballistic imaging in sprays},
  url          = {http://dx.doi.org/10.1364/OE.23.022444},
  volume       = {23},
  year         = {2015},
}