Imaging local acoustic pressure in microchannels
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...
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| Veröffentlicht in: | Applied Optics 2015-07, Vol.54 (21), p.6482-6490 |
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| container_end_page | 6490 |
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| container_issue | 21 |
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| container_title | Applied Optics |
| container_volume | 54 |
| creator | Oever, Jorick Van't Frentrop, Raimond Wijnperlé, Daniel Offerhaus, Herman van den Ende, Dirk Herek, Jennifer Mugele, Frieder |
| description | 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. |
| doi_str_mv | 10.1364/AO.54.006482 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0003-6935 |
| ispartof | Applied Optics, 2015-07, Vol.54 (21), p.6482-6490 |
| issn | 0003-6935 1559-128X 2155-3165 1539-4522 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1808089599 |
| source | Alma/SFX Local Collection; Optica Publishing Group Journals |
| subjects | Amplitudes Higher harmonics Illumination Imaging Microchannels Phase transformations Pressure distribution Refractivity |
| title | Imaging local acoustic pressure in microchannels |
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