| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a visual image novel, and to enhance impossibility in fabrication, by constituting so that directions of diffraction gratings are approximated to each other between cells close to each other and the direction of reflected diffraction light from a whole pattern is changed continuously. SOLUTION: In the pattern having dots consisting of the diffraction grating arranged in an array shape, the directions of the diffraction gratings in respective dots are changed continuously in the vertical direction in figure. Further, the directions of the diffraction gratings of a dot line are the same in the horizontal direction in figure. When the pattern in figure is observed, when the pattern is moved (or, an observer changes a viewing angle), the matter so that a brilliant line flows in the vertical direction is felt. If the directions of the diffraction gratings in the vertical direction are changed within the range of 180 deg., when the pattern is copied, the dots, in which the direction of the diffraction grating is equal, exists even to all scan directions, and since a dot copied in black without being copied occurs necessarily, it is suitable.</p> |
