Developing a confocal acoustic holography microscope for non-invasive 3D temperature and composition measurements.
A confocal acoustic holography microscope (CAHM) has been designed, simulated and partially verified experimentally to take holograms for non-invasive, three-dimensional measurements of a specimen's refractive indices from one view point. The designed and simulated prototype CAHM used a frequency of 2.25 MHz and measured sound speed changes of 16 m/s, temperature changes of 5 degrees C and had a spatial resolution of 660 microm. With future improvements utilizing the latest technologies such as two-dimensional array detectors, Micro-Electro-Mechanical Systems (MEMS), and acoustic lenses, resolutions of 1m/s, 0.5 degrees C, and 150 microm are expected. The CAHM is expected to have many useful applications, including non-invasive mass and heat transfer measurements in fluids and materials and as a medical diagnostic tool to non-intrusively visualize compositions and temperatures within the human body.
Herring
Rodney A
RA
Department of Mechanical Engineering, University of Victoria, Victoria, British Columbia, V8N 4T6, Canada. rherring@uvic.ca
Jacquemin
Peter
P
Sawicka
Barbara D
BD
Atalick
Stefan
S
D000162:Acoustics; D001823:Body Composition; D001831:Body Temperature; D003198:Computer Simulation; D004867:Equipment Design; D006696:Holography / Q000295:instrumentation / Q000379:methods; D006801:Humans; D021621:Imaging, Three-Dimensional; D018613:Microscopy, Confocal / Q000295:instrumentation* / Q000379:methods; D008857:Microscopy, Interference / Q000295:instrumentation / Q000379:methods