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:
Jan. 04, 2005
Filed:
Nov. 05, 2002
Makoto Okuno, Chiba, JP;
Hideo Sato, Aichi, JP;
Marvin B. Klein, Culver City, CA (US);
Bruno F. Pouet, Culver City, CA (US);
Makoto Okuno, Chiba, JP;
Hideo Sato, Aichi, JP;
Marvin B. Klein, Culver City, CA (US);
Bruno F. Pouet, Culver City, CA (US);
Kawasaki Steel Corporation, Kobe, JP;
Lasson Technologies, Inc., Culver City, CA (US);
Abstract
Longitudinal and shear ultrasonic waves are generated inside a material by irradiating a laser beam onto a first surface, e.g., incident surface, of the material. An ultrasonic longitudinal wave and a mode converted wave reflected by a second surface, e.g., a bottom surface, of the material are detected, and times of flight of the ultrasonic longitudinal wave and the mode converted wave are measured. A thickness of the material is measured based on the times of flight and a correlation, obtained in advance, between longitudinal and shear wave velocities of the material and temperature of the material.