Multi-section decoding lens

Details Multi-section decoding lens Multi-section decoding lens

2006-01-03

2006-01-03

Darrow, Justin T. (Department: 2132)

Cryptography

By modifying optical image

C380S051000, C380S055000

Reexamination Certificate

active

06983048

ABSTRACT:
The present invention is a multi-section lens for decoding at least two encodings, as a function of the parameters of a lens section, of at least one latent image, as implemented by a software program on a computer system, for security measures such as determining the authenticity of an object. The encoded latent image is a function of distinct lenticular parameters which may include the frequency and lens radius of curvature of a particular lens section. Each section has a corresponding encoded latent image thus allowing for multiple latent images and multiple encodings making it virtually impossible to counterfeit the encoded object or the decoding apparatus.

REFERENCES:
patent: 5708717 (1998-01-01), Alasia
patent: 6104812 (2000-08-01), Koltai et al.
patent: 6381071 (2002-04-01), Dona et al.
patent: 1 147912 (1997-10-01), None
patent: WO 92/04692 (1991-09-01), None

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