Summary
The interaction of a collimated light beam with an ultrasonic stationary field of circular cross-section is considered as a function of the incidence angle in the frame of the Raman-Nath theory. The temporal modulation wave forms of the Fraunhofer diffraction fringes are calculated. The discrepancies with the experimental results, already evidenced in the case of a field of rectangular cross-section, are confirmed. Such discrepancies are probably due to the neglecting of the actual bending of the light ray trajectories within the ultrasonic field.
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References
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Calligaris, F., Ciuti, P. & Gabrielli, I. Oblique interaction of a light beam with an ultrasonic stationary field of circular cross-section: Spatial and temporal modulation. Nuov Cim B 106, 789–798 (1991). https://doi.org/10.1007/BF02722547
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DOI: https://doi.org/10.1007/BF02722547