| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diffractive structure display body capable of performing monochromatic reverse display depending on a viewing direction in a normal observation state, reproducing authenticity determination information by irradiation with a laser beam and achieving a higher counterfeit prevention effect. <P>SOLUTION: The diffractive structure display body includes a first pattern region and a second pattern region disposed in parallel with each other. The first region comprises a hologram 14, which is disposed at a position out of the center O where a specified line passes on an image plane 11, the position parting from the center O in one direction along the specified line, and which contains phase information of a Fourier transform image 13 of an original image where a first image 12 is disposed, the phase information recorded as depth information by converting the phase data into multilevel data. The second region comprises a hologram 24, which is disposed at a position out of the center O where a line that makes an angle of 90° with respect to the above specified line passes on an image plane 21, the position parting from the center O in one direction along the line, and which contains phase information of a Fourier transform image 23 of an original image where a second image 22 is disposed, the phase information recorded as depth information by converting the phase data into multilevel data. <P>COPYRIGHT: (C)2011,JPO&INPIT |
