| 摘要 |
<p>[Object] To provide a hologram apparatus capable of reconstructing angle-multiplexed holograms recorded in a recording medium and correcting the incident angle of a reconstruction reference light beam made incident on the recording medium. [Solving Means] Light emitted from a light source 11 and passes through the collimating lens 12 forms a parallel light beam B1, which is reflected by a reflecting surface 13a of a movable mirror 13. The parallel light beam B1 is made incident on a recording medium 20 at an incident angle ¸1. The reconstructed light beam Da generated by Bragg diffraction caused by a hologram recorded in the recording medium 20 is output at an output angle ¸2. The output reconstructed light beam Da is received by a flat photosensor 14. In this way, information recorded in the form of a hologram is read out. By changing the angle of the movable mirror 13 in at least two directions, the incident angle ¸1 can be changed, and therefore, a hologram recorded in an angle multiplexed manner can be reconstructed. In addition, by changing the incident angle in a direction perpendicular to the changing direction, an incident angle of a reconstruction reference light beam B2 made incident on a hologram region can be controlled.</p> |
