Patent ID: 7859760
Filing Date: 2010-12-28
Classification: G02B,H01J,Y10S

Abstract:
1. A method for forming an image of a beam source that during operation provides a beam, and wherein the beam is split so as to divide the beam into beamlets, wherein a redirecting organ is used with which each individual beamlet is redirected to a predetermined degree with the extent of redirection of each beamlet by means of the redirecting organ depending on the distance of that beamlet to a central axis of the beam, such that the beamlets converge in a common point with the beamlets from the beam source being focused to foci located in the redirecting organ, and with the beamlets originating from these foci being focused in the common imaging point, and wherein the deflection of the beamlets is adjusted such that at the imaging point, the phase difference between the beamlets is 0 or 2 pi or a whole multiple of 2 pi.