The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 2021
Filed:
Dec. 11, 2018
Nisshinbo Holdings Inc., Tokyo, JP;
Ueda Japan Radio Co., Ltd., Ueda, JP;
NISSHINBO HOLDINGS INC., Tokyo, JP;
UEDA JAPAN RADIO CO., LTD., Nagano, JP;
Abstract
The present invention is aimed to provide, as an acoustic lens propagating a sonic wave having a wavelength λ of 100 μm or less, an acoustic lens capable of exhibiting excellent acoustic characteristics in response to the wavelength λ of the sonic wave to be propagated and a production method thereof. The acoustic lens is an acoustic lensto be used for propagating a sonic wave having a wavelength λ of 100 μm or less, wherein the acoustic lens contains a silicone resin and silica particles, an average primary particle diameter of the silica particles is 15 nm or more, and a particle diameter (D90) of 90% of a cumulative percentage in cumulative particle size distribution of the silica particles is less than ⅛ of the wavelength λ of the sonic wave to be propagated.