Optical System Using a Radial Harmonic Pupil Filter for Generating Collimated Beams

CIT No. 
Date Issued: 
December 03, 2002
Patent Number: 
Google Patents: 
Joseph Rosen
Boaz Salik
Amnon Yariv
A Fourier hologram with the distribution of a radial harmonic function creates, in the far field, 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. The beam can be shifted in space, twisted, or tilted.