Artículo
A method for the calibration of wideband ultrasonic sensors for optoacoustics
Hass, Ken; Insabella, Roberto Mariano; González, Martín Germán
; Riobó, Lucas Matías
; Veiras, Francisco Ezequiel
Fecha de publicación:
16/06/2021
Editorial:
American Institute of Physics
Revista:
Review of Scientific Instruments
ISSN:
0034-6748
e-ISSN:
1089-7623
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A method for calibration of ultrasonic sensors for optoacoustics that provides both frequency response and sensitivity is presented. In order to obtain the bandwidth and the frequency response of an uncalibrated sensor, a point source with broadband spectra generated by a laser-induced bubble on a copper wire submerged in water is employed. On the other hand, the sensitivity measurement relies on the spatial symmetry of the pressure pulse and on a calibrated transducer. Therefore, two sensors are employed to detect the pressure pulse at the same distance from the source. The symmetry of the acoustic field that arrives at both transducers is adjusted and verified by means of an optical interferometer that provides a null signal when the copper wire is placed at the right position. The method is tested on the characterization of a thin-film polymeric piezoelectric transducer with a cylindrical focused shape.
Palabras clave:
Optoacoustics
,
Sensors
,
Ultrasound
,
Optoacoustic tomography
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Hass, Ken; Insabella, Roberto Mariano; González, Martín Germán; Riobó, Lucas Matías; Veiras, Francisco Ezequiel; A method for the calibration of wideband ultrasonic sensors for optoacoustics; American Institute of Physics; Review of Scientific Instruments; 92; 6; 16-6-2021; 1-6
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