Oliff & Berridge, PLC
Hologram recording method, optical recording medium, and hologram-recording device
A hologram-recording method including recording a reflection-type volume hologram onto an optical recording medium by irradiating the optical recording medium with a modulated beam obtained by spatially modulating a laser beam and a diffused beam obtained by diffusing the modulated beam, coaxially but from different sides of the optical recording medium, respectively. The invention provides a hologram-recording method, an optical recording medium, and a hologram-recording device that enables on-demand recording of a reflection-type volume hologram which reliably prohibits forgery or alteration with a simple device configuration.
Fuji Xerox Co., Ltd.
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Kazuhiro Shin Katsunori Yasuhiro Jiro Hisae Koichi
Hayashi Yasuda Kawano Ogasawara Minabe Yoshizawa Haga