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Wellcome to the Biophotoacoustic group website. Currently we are involved in the theoretical
and experimental study of:
These projects are central actors in modern Photoacoustic, and are focuses in the use of the thermoelastic model of
the Photoacoustic Effect.
Biophotoacoustic Group (2012)
Introduction
The generation of sound by the absorption of light was first reported by A. G. Bell in 1880[1].
He found that when a periodically interrupted beam of sunlight shines on a solid in an enclosed
cell, an audible sound could be heard by means of a hearing tube attached to the cell. Immediately
after, Tyndall [2] and Roentgen [3] discovered that an acoustic signal can also be produced when a
gas in an enclosed cell is illuminated whit chopped light. At the same time Bell discussed the
problem of construction of a radiophone, " a divice for producing sound by radiation of any kind"
[4]. This was the born of the Frequency Domain Photoacoustic or just
Photoacoustics. The photoacoustic effect is the physical basis for photoacoustic; it
refers to the generation of acoustic waves by the absorption of electromagnetic energy, such as optical,
radio-frequency or microwaves ranges. Further studies of the photoacoustic effect and its applications
served, as is known, as the basis for the development of photoacoustics including photoacoustic
spectroscopy of gases and condensed media [5]. A powerful stimulus for the development of this field
was the construction of lasers, in particular in the 50's fast lasers allow the born of the Time
Domain Photoacoustic Technique (also callled Pulsed Photoacoustic
or simply Optoacoustic)
"Insight must precede application".
Max Planck (1919)
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