| 摘要 |
Hologram recording medium is manufactured by using computer. On a recording plane 20, cell position points Q are defined at a pitch Ph along the cell position lines f(i) which are arranged on the recording plane 20 at a pitch Pv. For each individual cell position point Q, an amplitude A and a phase &thetas; of a synthetic wave of object light components emitted from a plurality of sample points on an associated image contour are determined by computation. At each individual cell position point Q, is positioned a three-dimensional cell C, having a diffraction grating G, with a phase that is in accordance with the phase &thetas;, formed in an effective region E having an area that is in accordance with the amplitude A. The diffraction grating G is formed by periodically positioning staircase steps with a period &xgr;. With the three-dimensional cell C, a length Cv is set to. 20 μm, a width Ch is set to 0.4 μm, and the period is set to approximately 1 μm. |
