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:
Jun. 26, 1990
Filed:
Nov. 01, 1988
Hiroshi Fukukita, Tokyo, JP;
Shinichiro Ueno, Machida, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Ministry of International Trade & Industry, Tokyo, JP;
Abstract
An acoustic characteristic measurement method comprising transmitting into a specimen an ultrasonic probe pulse and a pulse formed by the superposition of the probe pulse centroid on a pump pulse of a lower frequency than that of the probe pulse at a portion where the particle acceleration of the pump pulse is at a peak, receiving reflections of the transmitted signal from two or more reflecting points that are at different depths in the specimen, frequency-analyzing the received signals and obtaining a spectral ratio, and using the spectral ratio to measure the distribution in the specimen of the degree of spectral separation and the crossover frequency.