US 12,440,190 B2
Apparatus and method for measuring velocity of acoustic surface wave using full-field laser ultrasound imaging technique
Tae Il Yoon, Gwangju (KR); Byeong Ha Lee, Gwangju (KR); and Young Gue Kim, Gwangju (KR)
Assigned to GIST(Gwangju Institute of Science and Technology), Gwangju (KR)
Filed by GIST(Gwangju Institute of Science and Technology), Gwangju (KR)
Filed on Jun. 20, 2023, as Appl. No. 18/337,590.
Claims priority of application No. 10-2023-0005557 (KR), filed on Jan. 13, 2023.
Prior Publication US 2024/0237970 A1, Jul. 18, 2024
Int. Cl. A61B 18/20 (2006.01); A61B 8/00 (2006.01)
CPC A61B 8/5207 (2013.01) [A61B 8/5223 (2013.01); A61B 18/203 (2013.01); A61B 8/4455 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of measuring the velocity of a surface wave, the method comprising:
emitting a laser pulse to a target material;
obtaining wavefront image of a surface wave, which propagates on a surface of the target material due to the laser pulse, by emitting a probe beam to the target material; and
determining a velocity of the surface wave based on variation of the wavefront image according to a time delay between the laser pulse and the probe beam.