Spatial image display apparatus
A spatial image display apparatus includes a display element including a plurality of pixels which are two-dimensionally arranged, and an imaging device that has a substrate including a plurality of dihedral corner reflectors arranged, the display element is disposed in a first space on one main surface of the substrate, and the imaging device forms a real image of a display image by the display element, in a second space on the other main surface of the substrate. The plurality of pixels are arranged in a period corresponding to a frequency that is equal to or less than a minimum spatial frequency at which an MTF value relative to a spatial frequency of the imaging device is minimized.
1. A spatial image display apparatus comprising:
a display element including a plurality of pixels which are two-dimensionally arranged; and
an imaging device that includes a substrate having a plurality of dihedral corner reflectors arranged, in which the display element is disposed in a first space on one main surface of the substrate, and the imaging device forms a real image of a display image by the display element, in a second space on the other main surface of the substrate,
wherein an MTF value of the imaging device relative to a spatial frequency of the imaging device decreases to a minimum value and then increases as a function of increasing spatial frequency and wherein the plurality of pixels of the display element are arranged in a period corresponding to a frequency that is equal to or less than a minimum spatial frequency at which the MTF value of the imaging device has the minimum value.
2. The spatial image display apparatus according to claim 1 , further comprising:
a polarizer that transmits light of a specific polarization direction, between the imaging device and the real image.
3. The spatial image display apparatus according to claim 2 ,
wherein the display element displays a display image which is polarized in the specific polarization direction.