Hologram recording medium and recording and reproducing system

摘要

A hologram recording medium is a hologram recording medium which is irradiated with light for recording information therein or reproducing information therefrom. The hologram recording medium has a recording layer (7) made of a photo-sensitive material capable of preserving an optical interference pattern, a reflective layer (4) disposed on one side of the recording layer opposite to the side on which an light beam impinges, and a quarter wavelength plate (6) interposed between the recording layer and the reflective layer.