| 摘要 |
PROBLEM TO BE SOLVED: To obtain a bright display in the viewfield of an observer by allowing the light which contains information to enter a hologram on the opposite side to the entrance side of the referential light in the production of the hologram and to enter in the opposite direction on the optical axis of the referential light to the referential light. SOLUTION: The light containing information generated by a projector 23 enters a hologram 22 and produces an image under conjugate conditions with the referential light when the hologram 22 is produced. The referential light satisfying the conjugate conditions is converged light in the opposite direction for the hologram 22 to the light from the projector 23, and the referential light is in the opposite side to the objective light for the hologram 22. By allowing the light generated from the projector 23 to enter the hologram 22 under the conjugate conditions with the referential light (the light diffused from the point at a distance L1 from the hologram enters the hologram at aα1 incident angle in the opposite direction to the referential light), the light is diffracted at aβ1 diffraction angle and focused on the position of the diffusing object (at a distance M1) in the production of the hologram to produce an image of the same size (with X1 horizontal length and Y1 vertical length).
|
