Multiple Laser Image / Changeable Laser Image (MLI / CLI)
A composite image which consists of several initial images. It is applied and visualized with the use of the lenticular technology. Depending on the angle of observation, one or the other initial image is visible. Consists of lenticular lenses which are embossed into the polymer substrate. Several initial images are cut into stripes and combined into one composite image which is applied by laser engraving under lenticular lenses. Initial images usually contain personal data.
Fig. 1. Scheme of MLI visualization
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Fig. 2. Sweden. Emergency passport issued in 2012:
a — data page. Polymer substrate; b — the same. Multiple laser image. Visualization of the holder's portrait at a 45º angle of observation; c — the same. Visualization of the holder's date of birth (yy-mm-dd) at a 135º angle of observation; d — the same. The array of lenticular lenses is applied by blind embossing. Horizontal orientation of the array of lenses
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b
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Fig. 3. Finland. Identification card issued in 1999:
a — front side. Polymer substrate; b — the same. Multiple laser image. Visualization of the holder's date of birth at a 45º angle of observation; c — the same. Visualization of FIN abbreviation at a 135º angle of observation. Vertical orientation of the array of lenses