Schaefer-Bergmann diffraction

Schaefer-Bergmann diffraction [1] is the resulting diffraction pattern of light interacting with sound waves in transparent crystals or glasses.  

See also

1. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1076617
2. http://prola.aps.org/abstract/PR/v52/i3/p223_1
3. http://www.springerlink.com/content/j06655j2441p21g7/