grating diffraction act to generate a radiation flux lamps nosa with distribution intensity set in an area sottendenteil flux.

摘要

A diffraction grating for generating a light beam in a predetermined area (9) subtending the beam, and presenting at least one phase-modulation diffraction surface (1a) with a number of diffraction projections (2) so arranged as to form a multiorder diffraction grating for distributing the light in a number of diffraction orders greater than 40; the number of the diffraction orders and the contour and size of the diffraction projections of the grating being so combined that the light emitted by the grating impinges on the area (9) with a predetermined light intensity distribution and predetermined angles of divergence in two perpendicular directions. IMAGE