Volume hologram medium

A volume hologram medium, wherein a plurality holograms of plane pattern images are multi-recorded as a reflection hologram by interference of the reference light beams having the same angle of incidence and the same wavelength with a second and further object light beams having mutually different angles of incidence,

• wherein the holograms of at least one of the planar pattern images is reconstructed at an angle relation approximately equal to an angle relation during recording;
• wherein at least another planar image comprising parallel interference fringes is created in an area that makes an angle with the recording plane;
• wherein the holograms of the another of the planar pattern images is reconstructed at the angle of incidence of white illumination light and in different colors depending on the angle of incidence
• wherein an image of a three-dimensional object is multi-recorded by interference of a second reference light having the same angle of incidence and wavelength as those of said reference light used for recording said plurality of plane pattern images with first object light having an angle of incidence different from that of said second and further object light used for recording to said plurality of plane pattern images,
• wherein each hologram of said plurality of plane pattern images is selectively recorded in only the area corresponding to each plane pattern,
• wherein the hologram of said plurality of plane pattern images comprise an image of the same plane pattern
• wherein the holograms of each of said images of the plane pattern is reconstructed at varying angles of incidence of a white illumination light in a color having a wavelength longer that than recording wavelength depending on angles of incidence,
• wherein the holograms of each of said images of the plane pattern is reconstructed at varying angles of incidence of the white illumination light with a peak value of 100% even when replayed at conditions different from the hologram-recording conditions,
• wherein each of the plurality of holograms of plane pattern images comprises interference fringes that are mutually parallel and uniform in the area at a slant angle parallel to the ½ angle between the second or further object light and the reference light in a hologram photosensitive material
• wherein each of the plurality of holograms of plane pattern images is recorded by interference of object light and reference light crossing at right angles with said area said section via a one-dimensional diffusion plate and
• wherein each of the plurality of holograms of plane pattern images is viewable at the same wavelength over a viewing angle (α) oriented in a direction to orthogonal to the recording plane.

A method for authentication of a volume hologram medium having a hologram of an image of a three-dimensional object and a hologram of at least one image of a plane pattern multi-recorded in a reflection hologram form by interference of reference light beams having the same angle of incidence and the same wavelength with a first and second object light beams having mutually different angles of incidence, wherein:

• an image of an array of lines or dots is recorded as said image of the plane pattern, and a pattern film on which an array of lines or dots is drawn at the same pitch as that of said plane pattern comprising an array of lines or dots is brought in alignment with said volume hologram medium, so that said volume hologram medium can be authenticated with moire fringes created between said image of at least one plane pattern and the pattern film comprising an array of lines or dots on said pattern film
• wherein the hologram of at least one image of the plane pattern is reconstructed in an angle relation approximately equal to an angle relation during recording;
• wherein the hologram of at least one image of the plane pattern comprising parallel interference fringes is created in an area that makes an angle with the recording plane;
• wherein the holograms of at least one image of the plane pattern is reconstructed at the angle of incidence of a white illumination light and in different colors depending on the angle of incidence
• wherein said at least one image of the plane pattern is reconstructed at varying angles of incidence of the white illumination light in a color having a wavelength longer that than recording wavelength depending on angles of incidence,
• wherein the hologram of said image of a plane pattern is reconstructed at varying angles of incidence of the white illumination light with a peak value of 100% even when replayed at conditions different from the hologram-recording conditions,
• wherein the hologram of the plane pattern image comprises interference fringes that are mutually parallel and uniform in one section at a slant angle parallel to the ½ angle between the second or further object light and the reference light in a hologram photosensitive material
• wherein the hologram of the plane pattern image is recorded by interference of the second object and the light and reference light crossing at right angles with said area via a one-dimensional diffusion plate and
• wherein the hologram is viewable at the same wavelength over a viewing angle (α) oriented in a direction to orthogonal to the recording plane.