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Journal of Visualization
Erschienen in: Journal of Visualization 3/2013

01.08.2013 | Regular Paper

Measurement sensitivity and resolution for background oriented schlieren during image recording

verfasst von: Ardian B. Gojani, Burim Kamishi, Shigeru Obayashi

Erschienen in: Journal of Visualization | Ausgabe 3/2013

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Abstract

Background oriented schlieren (BOS) visualization technique is examined by means of optical geometry. Two most important results are the calculation of the sensitivity and spatial resolution of a BOS system, which allows for the determination of the experiment design space. A set of relations that characterize the performance of a BOS measurement is given, with emphasis on the design of background pattern and spatial placement of optical components.

Graphical Abstract

Vorheriger Artikel Schlieren imaging and the real world
Nächster Artikel Visualization of supersonic flow over double wedge

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Fußnoten
1
Lorentz–Lorenz equation relates polarizability of an assembly of molecules to the refractive index. For gases, this relation can be approximated by the Gladstone–Dale equation (Born and Wolf 2005).
 
2
This equation holds for a ray of light that images a point from the physical space into a point in image space. As it is known from image analysis, the determination of pixel shifts with subpixel resolution is possible, but only over an area.
 
3
There are examples of the usage of BOS technique for visualizing open air blast waves with \(s_o \approx 400\) and \(s_t \approx 100\) m (Mizukaki et al. 2012).
 
4
In order to eliminate diffraction effects, Eq. (9) with k = 0 may serve as a threshold for the coherence length of the light source.
 
Literatur
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Metadaten
Titel
Measurement sensitivity and resolution for background oriented schlieren during image recording
verfasst von
Ardian B. Gojani
Burim Kamishi
Shigeru Obayashi
Publikationsdatum
01.08.2013
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Visualization / Ausgabe 3/2013
Print ISSN: 1343-8875
Elektronische ISSN: 1875-8975
DOI
https://doi.org/10.1007/s12650-013-0170-5

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