Efficient laser generation of surface acoustic waves

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

1982-12-28

1985-09-17

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73643, 73662, G01N 2904

Patent

active

045412804

ABSTRACT:
The surface acoustic waves are generated by laser beam that is focussed onto a surface to irradiate it in an arcuate pattern as a partial 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 directing 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.

REFERENCES:
patent: 4121470 (1978-10-01), Kaule
patent: 4169662 (1979-10-01), Kaule et al.

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