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Title:
MULTI-LAYER FILM DEPICTING A COLOUR TWO-DIMENSIONAL IMAGE WHICH IS ONLY VISIBLE THROUGH A POLARIZING FILTER AND PROCESS FOR MAKING THE FILM
Document Type and Number:
WIPO Patent Application WO/2010/073229
Kind Code:
A3
Abstract:
A film (1) depicting a colour two-dimensional image which is only visible through a polarizing filter comprises an optically active layer (2) placed over a polarizing layer (3) and configured to form said image on its face opposite the polarizing layer (3) when said face is seen through the polarizing filter; the optically active layer comprises a plurality of areas (4) arranged side by side in said face to form corresponding portions of the image, each area (4) being mechanically stressed to a predetermined intensity so that the corresponding portion of the image has a predetermined colour when seen through the polarizing filter. Also described is an apparatus (6) for making the film (1).

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Inventors:
BROEN MARTIN EDUARDO (IT)
TEOBALDO EMANUELE (IT)
GIROTTI ENRICO (IT)
MELANI GIACOMO (IT)
Application Number:
PCT/IB2009/055938
Publication Date:
September 30, 2010
Filing Date:
December 23, 2009
Export Citation:
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Assignee:
LUXOTTICA SRL (IT)
BROEN MARTIN EDUARDO (IT)
TEOBALDO EMANUELE (IT)
GIROTTI ENRICO (IT)
MELANI GIACOMO (IT)
International Classes:
B42D15/00
Domestic Patent References:
WO2007051529A12007-05-10
Foreign References:
US20070216518A12007-09-20
US20050121287A12005-06-09
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