Data carrier with an optically variable element

Details Data carrier with an optically variable element Data carrier with an optically variable element

1995-12-26

1998-09-15

Henry, Jon W.

Optical: systems and elements

Holographic system or element

Authentication

283 91, 283902, G06K 1916, G06K 1914, B42D 1510

Patent

active

058087583

ABSTRACT:
A data carrier with an optically variable element has a layer regularly reflecting incident light and including interruptions. A diffusely scattering layer is disposed on the regularly reflecting layer so as to be visible through at least one interruption to provide at least one optically recognizable marking based on the differences in the reflectivities of the two layers at different viewing angles.

REFERENCES:
patent: 4033059 (1977-07-01), Hutton et al.
patent: 4184700 (1980-01-01), Greenaway
patent: 4715623 (1987-12-01), Roule et al.
patent: 4932685 (1990-06-01), Mancuso
patent: 5128779 (1992-07-01), Mallik
patent: 5310222 (1994-05-01), Chatwin et al.
patent: 5331443 (1994-07-01), Stanisci
patent: 5344192 (1994-09-01), Phillips
patent: 5351142 (1994-09-01), Cueli
patent: 5492370 (1996-02-01), Chatwin et al.

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