Quantitative schlieren densitometer employing a neutral density wedge
作者:
Boye Ahlborn,
Christopher A. M. Humphries,
期刊:
Review of Scientific Instruments
(AIP Available online 1976)
卷期:
Volume 47,
issue 5
页码: 570-573
ISSN:0034-6748
年代: 1976
DOI:10.1063/1.1134682
出版商: AIP
数据来源: AIP
摘要:
In this schlieren system the probing laser beam is attenuated by a neutral density wedge (instead of the usual knife edge) so that the intensity is proportional to the deflection angle, which in turn is proportional to the density gradient. Time integration of the attenuated probe beam intensity yields the absolute refractive index variation across moving objects. The device is tested by measuring the density jump across a Mach 9 shock wave.
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