Volume illumination for two-dimensional particle image velocimetry

Autor:	M H B Gray, Carl D. Meinhart, Steven T. Wereley
Rok vydání:	2000
Předmět:	Physics Field (physics) business.industry Applied Mathematics Velocimetry Background noise Optics Particle image velocimetry Particle tracking velocimetry Particle business Instrumentation Engineering (miscellaneous) Image resolution Microscale chemistry
Zdroj:	Measurement Science and Technology. 11:809-814
ISSN:	1361-6501 0957-0233
DOI:	10.1088/0957-0233/11/6/326
Popis:	In particle image velocimetry experiments where optical access is limited or in microscale geometries, it may be desirable to illuminate the entire test section with a volume of light, as opposed to a two-dimensional sheet of light. With volume illumination, the depth of the measurement plane must be defined by the focusing characteristics of the recording optics. A theoretical expression for the depth of the two-dimensional measurement plane is derived and it is shown to agree well with experimental observations. Unfocused particle images, which lie outside the measurement plane, create background noise that decreases the signal-to-noise ratio of the particle-image fields. Results show that the particle concentration must be chosen judiciously in order to balance the desired spatial resolution and signal-to-noise ratio of the particle-image field.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::10e008290af0948701c89ca3901f42b0 https://doi.org/10.1088/0957-0233/11/6/326 Zobrazit plný text záznamu