Patent ID: 6424453
Filing Date: 2002-07-23
Classification: G02F

Abstract:
Method for the production of Gaussian intensity distribution of substantially circular cross-section for the beam profile of radiation generated by non-linear optical processes in non-linear optical materials, the method in which:a secondary radiation beam which has a non-Gaussian intensity distribution in a near field near the optical material and which has a far field and a transition field intermediate the near field and the far field is produced by directing primary radiation into the non-linear optical material; and the intensity distribution of the secondary radiation beam is modified to Gaussian intensity distribution with a substantially circular cross-section in the far field and at a finite distance from the non-linear optical material by providing an optical system of optical elements in the transition field and selecting the elements so that, taken as a whole, the system of optical elements is without divergence altering effect or imaging effect on the secondary radiation beam.