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US 8,301,029 B2Granted
Electroacoustic transducer
AssigneeXARION Laser Acoustics GmbH
InventorBalthasar Fischer
Life of this patent
Estimating the term…
Abstract
An acoustoelectric transducer comprising a laser source A and a light receiver H, wherein a soundfield S is provided by which the propagation velocity of the laser beam may be modulated according to the sound pressure while it traverses the soundfield S.
Claims6
An acoustoelectric transducer comprising:
- a laser source;
- an optical detector;
- a beam splitter configured to split a laser beam from said laser source into a first beam portion and a second beam portion;
- a soundfield through which said first beam portion passes;
- and
- an acoustically-insulated housing through which said second beam portion passes;
- wherein the propagation velocity of said first beam portion varies according to the sound pressure in said soundfield and said detector produces an electrical signal responsive to at least the variation in the propagation velocity of said first beam portion,
- wherein a phase difference between the first beam portion and the second beam portion is adjustable to λ/4+λz, wherein z is an integer.
5 more elements
An acoustoelectric transducer comprising:
- a laser source;
- an optical detector;
- a beam splitter configured to split a laser beam from said laser source into a first beam portion and a second beam portion;
- a soundfield through which said first beam portion passes;
- and
- an acoustically-insulated housing through which said second beam portion passes;
- wherein the propagation velocity of said first beam portion varies according to the sound pressure in said soundfield and said detector produces an electrical signal responsive to at least the variation in the propagation velocity of said first beam portion,
- wherein the two beam portions each are reflected multiple times between two plane parallel mirrors, wherein the one of the mirror pairs and its interspace is exposed to sound whereas the other one is protected against sound.
5 more elements
Dependencies are inferred from the claim text.