Patent ID: 7964857
Filing Date: 2011-06-21
Classification: G03F,G21K

Abstract:
1. A process using an optical device for generating, in a given direction of emission, radiation in a desired range of wavelengths, said process comprising: producing beams of initial radiation by a radiation source whose wavelengths include the desired range, filtering the beams of initial radiation to substantially eliminate the beams of initial radiation whose wavelength is outside the desired range, wherein said filtering is effected by introducing a controlled distribution of the refraction index of the beams in a control region that is traversed by the initial radiation to selectively deflect the beams of the initial radiation according to their wavelength, and to recover the beams of a desired wavelength; wherein the controlled distribution of the refraction index of the beams is obtained by controlling electron density distribution in the control region; and wherein the control region is located in a plasma.