| 摘要 |
PROBLEM TO BE SOLVED: To provide a spatial video image display device that can obtain a real image higher in luminance.SOLUTION: A spatial video image display device according to the present art comprises: one or a plurality of first optical plates; and a second optical plate. One or the plurality of first optical plates is configured to transmit an incident light ray so that a transmission gain has a larger peak in an optical axis direction of the incident light ray than one first optical plate. The second optical plate has a plurality of optical elements provided in a matrix, in which the plurality of optical elements is configured to perform a regular reflection of a transmission light ray of the first optical plate in a Z-axis direction component with respect to a substrate in which a normal line is a Z-axis direction, and perform a retroreflective reflection of the transmission light ray in X-Y axis direction components therewith. |
