| 摘要 |
A method for producing a single-layer diffractive combiner for a head-up display having a projection unit with n light sources of λi wavelength(s), where i=1 to n sending light towards the combiner at an angle &thetas;p. The method includes forming interference fringes for each λi wavelength on a photosensitive layer with an interference of two light beams from a single laser source of wavelength λe, where the forming step is repeated n times, and each time the forming step is repeated an angle &thetas;i between the two beams is determined according to &thetas;i=arcsin ((λe/λi)*sin(&thetas;p)), one of the interfering beams being divergent and having a spherical wave front and the other being a plane wave, the interference of the beams generating a diffractive network with an adjustable pitch and curved contour fringe lines.
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