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US 9,001,173 B2Granted
Method for producing a colour laser image that can be observed in three dimensions and document on which a colour laser image that can be observed in three dimensions is produced
OwnerJean-Pierre Lazzari, Jean-Marc Lazzariinventors
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Abstract
Disclosed are examples of methods and documents of a color laser image observable in three dimensions, which comprises a laserable protective sheet, an array of lenses, colored sub-pixels in column form, wherein a laser beam causes the grey levels to appear in two color laser images observable in three dimensions via stereoscopic effect, and a substrate. The whole, in various implementations, may be laminated. The axes of the columns of sub-pixels and of the lenses may be perpendicular. The laser beam may scan the sub-pixels along the axis of the lenses, in various embodiments.
Claims6
A method comprising:
- forming two different colour laser images from an assembly comprising:
- a substrate,
- a laserable protective sheet,
- an array of cylindrical optical lenses, and
- pixels formed by RGB sub-pixels printed in primary colours in the form of parallel columns,
- wherein the forming comprises causing grey levels of the two different colour laser images to appear by providing a laser beam through the array of cylindrical optical lenses, the laser beam carbonizing the laserable protective sheet opposite each of the RGB sub-pixels;
- and
- wherein the two different colour laser images, via reverse reflection of ambient light through the array of cylindrical optical lenses, appear to an observer of the assembly to be a three-dimensional colour laser image.
5 more elements
Dependencies are inferred from the claim text.