Hologram replicating method and hologram replicating apparatus

A hologram replicating method, comprising:

• arranging a hologram master having a hologram image recorded thereon with respect to a surface of a hologram recording medium;
• applying first laser light onto the hologram master and the hologram recording medium via a diffusion plate;
• modulating second laser light based on additional information;
• and
• applying the modulated second laser light onto the hologram recording medium via the hologram master.

A hologram replicating apparatus, comprising:

• a first application optical system configured to apply first laser light onto a hologram master having a hologram image recorded thereon and a hologram recording medium containing a photosensitive material,
• the hologram image being made to have continuous parallax in at least a first direction with a movement of an eyepoint along the first direction with respect to a normal line when the hologram master is illuminated at a predetermined angle,
• the hologram recording medium being brought into intimate contact with a surface of the hologram master directly or via a refractive index adjuster;
• a diffusion plate arranged between the first application optical system and the hologram recording medium and configured to diffuse incident light in a second direction;
• a second application optical system configured to apply second laser light onto the hologram recording medium via the hologram master;
• and
• a spatial light modulation element arranged between the second application optical system and the hologram master and configured to modulate incident light based on additional information, the first laser light and the second laser light being simultaneously applied to record the hologram image recorded on the hologram master and the additional information on the hologram recording medium.

A hologram replicating apparatus, comprising:

• a first application optical system configured to apply first laser light onto a hologram master having a hologram image recorded thereon and a hologram recording medium arranged with respect to a surface of the hologram master;
• a diffusion plate arranged between the first application optical system and the hologram recording medium;
• a second application optical system configured to apply second laser light onto the hologram recording medium via the hologram master;
• and
• a spatial light modulation element arranged between the second application optical system and the hologram master and configured to modulate incident light based on additional information.