DocumentCode
2796700
Title
Focusing and beamsteering of laser generated ultrasound
Author
Ing, R.K. ; Gires, F. ; Fink, M.
Author_Institution
Groupe de Phys. des Solides, Paris, France
fYear
1989
fDate
3-6 Oct 1989
Firstpage
539
Abstract
The generation of acoustical waves in solids by pulsed laser irradiation has the advantage of being contactless and nondestructive in the case of the thermoelastic mode. Unfortunately, acoustical characteristics of such a source are limited. To modify these parameters, a phased array of thermooptical sources was made by moving the laser beam, and control of beam directivity was obtained. Achievement of such an array is accomplished with an acoustooptic deflector synchronized with a large pulse dye laser. The influence of the velocity and geometry of the moving source is studied, and comparison with a motionless source is made
Keywords
laser beam effects; photoacoustic effect; ultrasonic waves; acoustical waves; acoustooptic deflector; beam directivity; dye laser; pulsed laser irradiation; thermoelastic mode; thermooptical sources; Acoustic beams; Acoustic pulses; Laser beams; Laser modes; Optical arrays; Optical pulse generation; Phased arrays; Solid lasers; Thermoelasticity; Ultrasonic imaging;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location
Montreal, Que.
Type
conf
DOI
10.1109/ULTSYM.1989.67043
Filename
67043
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