Three-dimensional ray theory of astigmatic Bragg diffraction image formation with anastigmatic illumination.
We analyze and demonstrate Bragg diffraction imaging with convenient anastigmatic (e.g., spherical) illumination and find that this technique results in separately located horizontal and vertical images of the sound field with different magnification and resolution. Results of physical experiments show good agreement with theory and demonstrate that the insertion of one relatively weak cylinder lens makes the images coincide.
Korpel
A
A
Mehrl
D J
DJ