| 摘要 |
PROBLEM TO BE SOLVED: To pseudo-present faithfully a display mode of a diffraction grating recording medium. SOLUTION: The information (a grating line arrangement angleδ, a grating line pitch p, a numerical aperture A, diffraction efficiency K) specifying a diffraction grating to be allocated to respective pixels are inputted from an input means 110, and prescribed observational conditions (an angleθformed between white parallel light beams and a gaze, an inclination angleαof a medium) are set in an observational condition setting means 120. An observation wavelength calculating means 130 calculates a wavelengthλof N-th diffracted light beams observed from respective pixels, and a luminance arithmetic means 140 calculates its luminance V. A three primary color arithmetic means 150 obtains color component values of three primary colors R, G, B based onλand V at every pixel. A presenting image data forming means 160 forms the image data based on the RGB values at every pixel to store them in a frame memory 170. The image is presented on a color display 180. When the angleαis revised gradually by a condition revision means 190, the change in the display mode is presented as an animation by a video recording device 180.
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