Efficient laser generation of surface acoustic waves

Details Efficient laser generation of surface acoustic waves Efficient laser generation of surface acoustic waves

G - Physics

01

N

349/42

G01N 29/04 (2006.01)

Patent

CA 1210128

TITLE EFFICIENT LASER GENERATION OF SURFACE ACOUSTIC WAVES INVENTORS Paolo G. Cielo Jean Bussière ABSTRACT OF THE DISCLOSURE The surface acoustic waves are generated by laser beam that is focussed onto a surface to irradiate it in an arcuate pattern as a par- tial annulus or as a still or moving fringe pattern. The arcuate pattern may be formed by a transmitting or a reflecting axicon, while the fringe pattern may be formed by splitting the laser beam into two beams and di- recting the two beams to the surface. In addition, a lens or a frequency shifting device may be placed in the path of one of the split beams to form a circular fringe or a moving fringe, respectively.

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