Patent ID: 6377367
Filing Date: 2002-04-23
Classification: G03H,G11B

Abstract:
A hologram recording/reproducing method comprising the steps of:providing a first hologram recording medium on which a first hologram has been recorded by interference between an object beam and a reference beam; simultaneously applying a first beam that is identical to the reference beam and a second beam that is conjugate to the reference beam, as reading beams, to the first hologram recording medium; forming a second hologram by a third beam that results from the interference between the first beam and the second beam; forming a third hologram by a fourth beam that results from the interference between the first beam and the second beam; and recording the second and third holograms on the first hologram recording medium so that one of the second hologram and the third hologram is superposed on the other of the second hologram and the third hologram as a fourth hologram, thereby reproducing the first hologram.