Patent ID: 8203788
Filing Date: 2012-06-19
Classification: G02B

Abstract:
1. An electromagnetic beam converter for conversion of an input beam of electromagnetic radiation a(x,y) into an output beam having a prescribed target intensity profile I(x′,y′), the beam converter comprising a generalized phase contrast system with a phase modifying element positioned for illumination by the input beam a(x,y) and for phase modulation of the input electromagnetic beam by phasor values e first Fourier or Fresnel optics positioned in the propagation path of the phase modulated radiation for Fourier or Fresnel transforming the phase modulated electromagnetic radiation a(x,y) e a spatial filter for filtering the Fourier or Fresnel transformed electromagnetic field by second Fourier or Fresnel optics for forming an output electromagnetic field with the prescribed intensity profile I(x′, y′) by Fourier or Fresnel transforming the phase shifted Fourier or Fresnel transformed electromagnetic field, wherein the input beam has a Gaussian intensity profile wherein w wherein I