Improved resolution and signal-to-noise ratio in laser-ultrasonics by SAFT processing

被引：65
|
作者：
Blouin, A [1 ]
Levesque, D [1 ]
Neron, C [1 ]
Drolet, D [1 ]
Monchalin, JP [1 ]
机构：
[1] Natl Res Council Canada, Inst Ind Mat, Boucherville, PQ J4B 6Y4, Canada
来源：
OPTICS EXPRESS | 1998年 / 2卷 / 13期
关键词：
D O I：
10.1364/OE.2.000531
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Laser-ultrasonics is an emerging nondestructive technique using lasers for the generation and detection of ultrasound which presents numerous advantages for industrial inspection. In this paper, the problem of detection by laser-ultrasonics of small defects within a material is addressed. Experimental results obtained with laser-ultrasonics are processed using the Synthetic Aperture Focusing Technique (SAFT), yielding improved flaw detectability and spatial resolution. Experiments have been performed on an aluminum sample with a contoured back surface and two flat-bottom holes. Practical interest of coupling SAFT to laser-ultrasonics is also discussed. (C) 1998 Optical Society of America.
引用
收藏
页码：531 / 539
页数：9
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