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:
Feb. 16, 2021
Filed:
Nov. 01, 2018
Hitachi, Ltd., Tokyo, JP;
Kazuo Ishiyama, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
Laser ultrasonic testing includes a laser apparatus; a splitting unit that splits a pulsed laser from the laser apparatus into first and second lasers; a first pulse width conversion unit that converts a pulse width of the first laser; a first optical system that guides the first laser having the converted pulse width to a test object; a second pulse width conversion unit that converts a pulse width of the second laser; a pulse propagation time adjustment unit that adjusts a propagation time of the second laser having the converted pulse width; a second optical system that guides the second laser having the converted pulse width and adjusted propagation time to the test object; and a detection unit that detects a surface displacement change of the test object caused by an ultrasonic wave generated by the first laser when the second laser is reflected by the test object.