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High-speed structured planar laser illumination for contrast improvement of two-phase flow images

Kristensson, Elias LU ; Berrocal, Edouard LU ; Richter, Mattias LU ; Pettersson, Sven-Göran LU and Aldén, Marcus LU (2008) In Optics Letters 33(23). p.2752-2754
Abstract
A high-speed method to remove blurring effects caused by multiple scattering in planar laser images of two-phase flows is demonstrated. The technique is based on structured illumination and is for the first time to our knowledge applied on a dynamic medium. As structured illumination requires three successive images to be recorded and to freeze the flow motion in time, a high-speed laser and imaging system is employed. We show that by using a time delay of 55 us between the images a single-shot representation of a dilute flow of water droplets can be achieved. By having an additional inner stream with known structure and composition, the efficiency of the method is quantitatively evaluated, showing an increase from 58% to 93% in image... (More)
A high-speed method to remove blurring effects caused by multiple scattering in planar laser images of two-phase flows is demonstrated. The technique is based on structured illumination and is for the first time to our knowledge applied on a dynamic medium. As structured illumination requires three successive images to be recorded and to freeze the flow motion in time, a high-speed laser and imaging system is employed. We show that by using a time delay of 55 us between the images a single-shot representation of a dilute flow of water droplets can be achieved. By having an additional inner stream with known structure and composition, the efficiency of the method is quantitatively evaluated, showing an increase from 58% to 93% in image contrast. Such an improvement allows more accurate analysis and interpretation of scattering two-phase flow images. (C) 2008 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Letters
volume
33
issue
23
pages
2752 - 2754
publisher
Optical Society of America
external identifiers
  • wos:000262206500010
  • scopus:57649149802
ISSN
0146-9592
language
English
LU publication?
yes
id
c3e33208-6c48-493c-80fd-e7dbf35a424a (old id 1376168)
date added to LUP
2009-05-08 14:25:21
date last changed
2017-11-12 03:48:45
@article{c3e33208-6c48-493c-80fd-e7dbf35a424a,
  abstract     = {A high-speed method to remove blurring effects caused by multiple scattering in planar laser images of two-phase flows is demonstrated. The technique is based on structured illumination and is for the first time to our knowledge applied on a dynamic medium. As structured illumination requires three successive images to be recorded and to freeze the flow motion in time, a high-speed laser and imaging system is employed. We show that by using a time delay of 55 us between the images a single-shot representation of a dilute flow of water droplets can be achieved. By having an additional inner stream with known structure and composition, the efficiency of the method is quantitatively evaluated, showing an increase from 58% to 93% in image contrast. Such an improvement allows more accurate analysis and interpretation of scattering two-phase flow images. (C) 2008 Optical Society of America},
  author       = {Kristensson, Elias and Berrocal, Edouard and Richter, Mattias and Pettersson, Sven-Göran and Aldén, Marcus},
  issn         = {0146-9592},
  language     = {eng},
  number       = {23},
  pages        = {2752--2754},
  publisher    = {Optical Society of America},
  series       = {Optics Letters},
  title        = {High-speed structured planar laser illumination for contrast improvement of two-phase flow images},
  volume       = {33},
  year         = {2008},
}