| 摘要 |
<p>A holographic device includes a reference beam unit (1) that makes reference beams (15) incident on a plurality of holograms (31) formed in a plate-shaped recording medium (30); and a light receiving unit (2) that receives exiting light (33) diffracted by the holograms. The reference beam unit includes a light emitting part (10) that emits the reference beams (15), and sets the incidence position and the incidence angle of each of the reference beams emitted from the light emitting part such that each of the reference beams is incident on one of the plurality of holograms disposed in the thicknesswise direction of the recording medium. The light receiving unit includes a light receiving part (20) that receives the exiting light from the holograms and a pin-hole filter (21) disposed between the light receiving part (20) and the recording medium (30). The pin-hole filter transmits only exiting light from one of the plurality of holograms disposed in the thicknesswise direction of the recording medium, the one of the plurality of holograms corresponding to the incidence position and the incidence angle set by the reference beam unit, and blocks exiting light from the other holograms.</p> |
