Imaging local acoustic pressure in microchannels

Autor:	Herman L. Offerhaus, Daniël Wijnperle, Jennifer Lynn Herek, Frieder Mugele, Dirk van den Ende, Raimond N. Frentrop, Jorick van ‘t Oever
Přispěvatelé:	Faculty of Science and Technology, Physics of Complex Fluids, Optical Sciences
Rok vydání:	2015
Předmět:	Materials science Microchannel business.industry Materials Science (miscellaneous) Phase (waves) Resonance Industrial and Manufacturing Engineering law.invention Amplitude Optics Pressure measurement law Harmonic Business and International Management business Sound pressure Excitation
Zdroj:	Applied Optics, 54(21), 6482-6490. Optical Society of America
ISSN:	1539-4522 0003-6935
DOI:	10.1364/ao.54.006482
Popis:	A method for determining the spatially resolved acoustic field inside a water-filled microchannel is presented. The acoustic field, both amplitude and phase, is determined by measuring the change of the index of refraction of the water due to local pressure using stroboscopic illumination. Pressure distributions are measured for the fundamental pressure resonance in the water and two higher harmonic modes. By combining measurement at a range of excitation frequencies, a frequency map of modes is made, from which the spectral line width and Q-factor of individual resonances can be obtained.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f210b8429ea4bfa02b4cce67e4266c8 https://doi.org/10.1364/ao.54.006482 Zobrazit plný text záznamu