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Limitations of ICCD detectors and optimized 2D phosphor thermometry

Lindén, Johannes LU ; Knappe, Christoph LU ; Richter, Mattias LU and Aldén, Marcus LU (2012) In Measurement Science & Technology 23(3).
Abstract
This paper presents investigations on the limitations of intensified CCD (ICCD) cameras when performing quantitative 2D temperature measurements using thermographic phosphors. The temperature is evaluated using a two-color ratio technique, which demands high signal linearity of the detector. However, this work shows that the ICCD cameras used suffer from nonlinearity at levels of irradiance that do not necessarily produce particularly high count levels, i.e. well below the saturation limit of the A/D converter. For the phosphor thermometry, this results in false absolute temperature readings and decreased measurement precision. The results show that there is a useful workspace in the irradiance/camera gain combination where the detector... (More)
This paper presents investigations on the limitations of intensified CCD (ICCD) cameras when performing quantitative 2D temperature measurements using thermographic phosphors. The temperature is evaluated using a two-color ratio technique, which demands high signal linearity of the detector. However, this work shows that the ICCD cameras used suffer from nonlinearity at levels of irradiance that do not necessarily produce particularly high count levels, i.e. well below the saturation limit of the A/D converter. For the phosphor thermometry, this results in false absolute temperature readings and decreased measurement precision. The results show that there is a useful workspace in the irradiance/camera gain combination where the detector should preferably be used. A response function for the ICCD camera used is constructed. Furthermore, in order to perform quantitative measurements, there is an upper limit of counts that should not be exceeded. This limit must be investigated for each experimental configuration since it depends on the characteristics of the specific light source and also varies between different cameras. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
laser-induced phosphorescence, thermographic phosphors, thermometry, image intensifier, ICCD detectors, saturation
in
Measurement Science & Technology
volume
23
issue
3
publisher
IOP Publishing
external identifiers
  • wos:000300614800019
  • scopus:84857405500
ISSN
0957-0233
DOI
10.1088/0957-0233/23/3/035201
language
English
LU publication?
yes
id
53c7ecc1-8bdc-41b6-acc8-ec81e8de6a1f (old id 2390878)
date added to LUP
2012-03-27 14:45:29
date last changed
2017-08-20 04:06:08
@article{53c7ecc1-8bdc-41b6-acc8-ec81e8de6a1f,
  abstract     = {This paper presents investigations on the limitations of intensified CCD (ICCD) cameras when performing quantitative 2D temperature measurements using thermographic phosphors. The temperature is evaluated using a two-color ratio technique, which demands high signal linearity of the detector. However, this work shows that the ICCD cameras used suffer from nonlinearity at levels of irradiance that do not necessarily produce particularly high count levels, i.e. well below the saturation limit of the A/D converter. For the phosphor thermometry, this results in false absolute temperature readings and decreased measurement precision. The results show that there is a useful workspace in the irradiance/camera gain combination where the detector should preferably be used. A response function for the ICCD camera used is constructed. Furthermore, in order to perform quantitative measurements, there is an upper limit of counts that should not be exceeded. This limit must be investigated for each experimental configuration since it depends on the characteristics of the specific light source and also varies between different cameras.},
  author       = {Lindén, Johannes and Knappe, Christoph and Richter, Mattias and Aldén, Marcus},
  issn         = {0957-0233},
  keyword      = {laser-induced phosphorescence,thermographic phosphors,thermometry,image intensifier,ICCD detectors,saturation},
  language     = {eng},
  number       = {3},
  publisher    = {IOP Publishing},
  series       = {Measurement Science & Technology},
  title        = {Limitations of ICCD detectors and optimized 2D phosphor thermometry},
  url          = {http://dx.doi.org/10.1088/0957-0233/23/3/035201},
  volume       = {23},
  year         = {2012},
}