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Publication numberWO2009001306 A3
Publication typeApplication
Application numberPCT/IB2008/052541
Publication date25 Mar 2010
Filing date25 Jun 2008
Priority date28 Jun 2007
Also published asWO2009001306A2
Publication numberPCT/2008/52541, PCT/IB/2008/052541, PCT/IB/2008/52541, PCT/IB/8/052541, PCT/IB/8/52541, PCT/IB2008/052541, PCT/IB2008/52541, PCT/IB2008052541, PCT/IB200852541, PCT/IB8/052541, PCT/IB8/52541, PCT/IB8052541, PCT/IB852541, WO 2009/001306 A3, WO 2009001306 A3, WO 2009001306A3, WO-A3-2009001306, WO2009/001306A3, WO2009001306 A3, WO2009001306A3
InventorsSzabolcs Deladi, Jan F. Suijver
ApplicantKoninklijke Philips Electronics N.V.
Export CitationBiBTeX, EndNote, RefMan
External Links: Patentscope, Espacenet
Acoustic device with a variable focal length
WO 2009001306 A3
The invention relates to an acoustic device comprising an acoustic lens with variable focal length and means (11) for directing incoming acoustic waves onto thelens, wherein the acoustic lens comprises a first fluid medium (1) and a second fluid medium (2) that are not misciblewitheach other, in which the acoustic waves (21) have different velocities and with a contact meniscus (3) between the two fluid media (1,2), wherein the 5 difference in viscosity of the two fluid media (1,2) is such that the contact meniscus is substantiallyunperturbed by the acoustic waves (21). The invention is based on the experimental observation that the main physical parameter whichdetermines the interaction between the acoustic waves (21) and the contact meniscus (3) are the values of the viscosity ofthe two fluid media (1,2). Therefore, the perturbation of the contact meniscus (3) between 10 the two fluid media (1,2) by the acousticwaves (21) is reduced considerably when the values ofthe viscosity of the two fluid media (1,2) are selected appropriately leading to an increased controlofthe functioning of the acoustic lens.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
WO2003069380A1 *24 Jan 200321 Aug 2003Koninklijke Philips Electronics N.V.Variable focus lens
WO2005122139A2 *3 Jun 200522 Dec 2005Koninklijke Philips Electronics N.V.Acoustic device with variable focal length
DE19704940C1 *10 Feb 199722 Jan 1998Stn Atlas Elektronik GmbhAcoustic lens or prism device for sonar apparatus
US5305755 *4 Mar 199226 Apr 1994Fujitsu LimitedUltrasonic probe, having transducer array capable of turning around its aperture axis and having a convex lens comprising a viscous resin
Non-Patent Citations
1 *GELEST: "Silicone Fluids: stable inert media" GELEST, INC., 2004, pages 1-25, XP002562281
International ClassificationG10K11/30
Cooperative ClassificationG10K11/30
European ClassificationG10K11/30
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