HOLOGRAM RECONSTRUCTION DEVICE AND HOLOGRAM RECONSTRUCTION METHOD

摘要

An objective of the present invention is to provide a hologram reconstruction device and hologram reconstruction method capable of appropriately reconstructing information recorded in a hologram recording medium. The hologram reconstruction device reconstructs information which is recorded in a hologram recording medium, and the hologram reconstruction method is used with the hologram reconstruction device. The hologram reconstruction device comprises: a light source which emits a reference light; an entry angle change unit which is capable of changing the entry angle of the reference light which enters the hologram recording medium; an angle error signal generating unit which generates an angle error signal; a target angle setting unit which sets a target angle of the entry angle of the reference light; and an entry angle control unit which controls the entry angle change unit, using as a control target the target angle set by the target angle setting unit. The target angle setting unit changes the target angle on the basis of the angle error signal in a period wherein the entry angle control unit controls the entry angle change unit to change the entry angle of the reference light.