Calibration of ultrasonic sensors using optoacoustics

Amir Rosenthal; Vasilis Ntziachristos; Daniel Razansky

doi:10.1117/12.873858

18 February 2011 Calibration of ultrasonic sensors using optoacoustics

Amir Rosenthal, Vasilis Ntziachristos, Daniel Razansky

Proceedings Volume 7899, Photons Plus Ultrasound: Imaging and Sensing 2011; 78992L (2011) https://doi.org/10.1117/12.873858
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Ultrasonic detectors are commonly calibrated by finding their response to incident plane waves. However, in optoacoustics, the response to broadband point sources is required. To induce such sources using the optoacoustic effect, the illuminated object's dimensions must be smaller than the resolution achievable by the optoacoustic system. The main difficulty in such measurements is that the magnitude of the field emitted by such sources is proportional to their dimensions, and thus may be weak compared to parasitic sources in the setup. In this work we experimentally demonstrate two methods for calibrating acoustic detectors. In both methods, acoustic sources are optoacoustically induced in large optically absorbing slabs. Despite the large dimensions of the illuminated objects, the geometry used yields wide-band acoustic fields, which are perceived by the detectors as originating from point sources.

Citation Download Citation

Amir Rosenthal, Vasilis Ntziachristos, and Daniel Razansky "Calibration of ultrasonic sensors using optoacoustics", Proc. SPIE 7899, Photons Plus Ultrasound: Imaging and Sensing 2011, 78992L (18 February 2011); https://doi.org/10.1117/12.873858

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available