| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-dimensional image display device, capable of displaying a high quality reconstructed image by making effective use of the focusing function of the observer's eyes, using a simple constitution. SOLUTION: The interval between luminescent spots, constituting an objective reconstructed image to be displayed and/or an initial phase value, is set so that reproduce the light which reaches a region, where a reconstructed image by diffraction of a specific order in a spatial light modulating element 11 can be observed has a plurality of peak positions on a rear focal plane of a lens 12, and the spatial light modulating element 11 is made to exhibit a hologram, capable of displaying the objective reconstructed image. Illuminating light 90, incident on the spatial light modulation element 11 exhibiting the hologram, is amplitude- or phase-modulated at each pixel. This modulated light, that is, the reproduced light is subjected to wavefront conversion by the lens 12, whereby a reconstructed image is formed. An observer who locates the pupil of the eye near an aperture 13A in a mask 13 can observe the displayed reconstructed image 93 through the aperture 13A and a half mirror 15. COPYRIGHT: (C)2005,JPO&NCIPI
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