Patent ID: 9535401
Date: 2017-01-03
CPC Classifications: G02B,G03H

Claim:
1. An electronic holography display apparatus which displays a 3D reconstructed image based on an electronically generated hologram, comprising: a beam emitting device that emits parallel beams; a plurality of polarizing beam splitters each of which reflects, from the parallel beams emitted from the beam emitting device, a portion of polarization components contained in the parallel beams, makes another portion of the polarization components pass therethrough, and makes a beam coming from a direction of the reflection pass therethrough; a plurality of spatial light modulators each of which is disposed in a same plane with a prescribed distance between adjacent spatial light modulators, facing each of the corresponding polarizing beam splitters, modulates a beam which has been reflected by the polarizing beam splitter and has been then made incident vertically thereon, and emits the modulated beam; a magnifying optical system that magnifies a luminous flux diameter of each of the beams having been emitted from a plurality of the spatial light modulators and then having been passed through a plurality of the corresponding polarizing beam splitters; and a reducing optical system that reduces the luminous flux diameter of the beam emitted from the magnifying optical system, wherein the magnifying optical system comprises: wherein the reducing optical system comprises: wherein a distance “a” between the spatial light modulator and the first lens array is represented by a=(k+2) f