| 摘要 |
<p>A Fourier hologram, placed at rear focal plane (Pi), with the distribution of a radial harmonic function creates, in the far field, near focal plane (Pf), a pseudo non-diffracting beam. The properties of this pseudo non-diffracting beam can be set by appropriate characterization of the radial harmonic function. Various operations can also be carried out to change the position of the beam relative to the focal point (Z=0). The beam can be shifted in space, twisted, or tilted.</p> |
