Holographic recordings replaying images upon illumination
There are provided volume holograms and combinations of lenticular lenses and holograms in particular for security applications. In embodiments, a volume hologram comprises a holographic medium ( 102 ) including a first optical interference structure which, upon illumination, replays a first image ( 110 ); wherein the first image includes a lenticular lens layer ( 111 ) including an array of lenticules and a lenticular image layer ( 113 ) including first ( 114 ) and second ( 115 ) interlaced images corresponding with the array of lenticules.
1. A volume reflection hologram including a holographic medium, the holographic medium including:
a first optical interference structure which upon a first illumination at a first angle replays by reflection a first holographic recording of a first image including first data; and
a second optical interference structure which upon a second illumination at a second angle different than the first angle replays by reflection a second holographic recording of a second image including second data.
2. A hologram according to claim 1 , wherein the first and/or second data includes security, verification, validation, identification and/or authentication data.
3. A hologram according to claim 1 , wherein the first and second data contain co-encrypted elements.
4. A hologram according to claim 1 ,
wherein the first optical interference structure replays the first image upon illumination with a first wavelength of light; and
wherein the second optical interference structure replays the second image upon illumination with a second wavelength of light.
5. A hologram according to claim 1 ,
wherein the first optical interference structure replays the first image at a first apparent depth upon illumination; and
wherein the second optical interference structure replays the second image at a second apparent depth upon illumination.
6. A volume hologram including a holographic medium, the holographic medium including:
a first optical interference structure which upon a first illumination at a first angle replays a first holographic recording of a first image including first data; and
a second optical interference structure which upon a second illumination at a second angle different than the first angle replays a second holographic recording of a second image including second data;
wherein the first and/or second image includes a lenticular lens layer including an array of lenticules and a lenticular image layer including first and second interlaced images corresponding with the array of lenticules.