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US 7,161,722 B2Granted
Holographic printer
AssigneeGeola Technologies Ltd.
InventorsDavid Brotherton-Ratcliffe, Alexey Rodin
Life of this patent
Estimating the term…
Abstract
A holographic printer is disclosed which produces an intermediate hologram H3 and uses the intermediate hologram H3 to produce a white light viewable hologram H2.
Claims55
A 2-step holographic printer wherein:
- in a first mode of operation said holographic printer produces at least one intermediate hologram (H3), said intermediate hologram (H3) being formed on a first substrate;
- and
- in a second mode of operation said holographic printer produces a white light viewable hologram (H2) from said at least one intermediate hologram (H3), said white light viewable hologram being written on a second substrate that is positioned parallel to said first substrate and at a distance d from said first substrate where d is greater than zero and less than the distance between a camera (H1) plane and the white light viewable hologram (H2) plane.
A method of printing a hologram, comprising:
- producing at least one intermediate hologram (H3) on a first substrate in a holographic printer;
- positioning a second substrate parallel to said first substrate and at a distance d from said first substrate where d is greater than zero and less than the distance between a camera (H1) plane and a white light viewable hologram (H2) plane;
- and
- using said same holographic printer to produce the white light viewable hologram (H2) on said second substrate from said at least one intermediate hologram (H3).
1 more element
A holographic copying device comprising an apparatus wherein:
- said copying device generates an undistorted white light viewable hologram (H2) from at least one intermediate hologram (H3), said at least one intermediate hologram (H3) having been written on a first substrate and said white light viewable hologram (H2) being written on a second substrate;
- and
- said second substrate is positioned parallel to said first substrate and positioned at a distance d from said first substrate where d is greater than zero and less than the distance between a camera (H1) plane and the white light viewable hologram (H2) plane.
Dependencies are inferred from the claim text.