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:
Mar. 26, 1991
Filed:
Apr. 12, 1989
Kazuo Sato, Tokyo, JP;
Hiroshi Kanda, Tokorozawa, JP;
Shigeo Kato, Mitaka, JP;
Kuninori Imai, Kanagawa, JP;
Takeji Shiokawa, Fuchu, JP;
Shinji Tanaka, Akishima, JP;
Isao Ishikawa, Hino, JP;
Harumasa Onozato, Oume, JP;
Hisayoshi Hashimoto, Ushiku, JP;
Morio Tamura, Tsuchiura, JP;
Kazuyoshi Hatano, Ibaraki, JP;
Fujio Sato, Tsukuba, JP;
Ken Ichiryuu, Ibaraki, JP;
Kiyoshi Tanaka, Mizukaido, JP;
Takao Kawanuma, Ibaraki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.