| 摘要 |
PURPOSE:To make a device large-sized and relatively inexpensive by arranging continuously plural composite turning faces, where direction turning face parts and plane parts are provided alternately, on one face of a transmission surface body consisting of a transparent plane plate and arranging plural aberration faces provided with light aberration face parts to form a transmission surface. CONSTITUTION:Plural composite turning faces 4 where light direction turning face parts 5 which can be discriminated with the naked eyes and plane parts 6 and 8 are arranged alternately and continuously to form symmetrical step faces are arranged continuously on one face of a transmission surface body 1 consisting of a transparent plane plate. Plural aberration faces 9 provided with light aberration face parts 7 are arranged on the other face of the transmission surface body 1 to form the transmission surface. Thus, a large parallax required for the three-dimensional view of a picture element group which has enough size to be discriminated visually can be obtained, and rising and sinking of an image are seen by the large parallax of both eyes in the composite turning face unit due to the direction turning action of direction turning face parts, the aberration action of aberration face parts 7, and the synergistic effect of transmission actions of plane parts 6 and 8.
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