| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a display body comprising a computer-generated hologram, which has no homogenous glowing region, particularly no white region, when the hologram is visually observed, which can display a sharp gradation image, even if the amount of information to be recorded is increased, which decreases errors for reading the information, and which makes optical duplication extremely difficult for forgery or falsification. SOLUTION: In the display body to display an image by disposing a plurality of cells as pixels, each cell consists of a dot-type computer-generated hologram, in which the preliminarily determined information is recorded as the object light and the gradation image is displayed, by varying the luminance of pixels on the image by varying the diffraction efficiency of each cell.</p> |
