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1. (WO2002005204) TRANSPARENT DATA CARD

Pub. No.:    WO/2002/005204    International Application No.:    PCT/IB2001/001219
Publication Date: Jan 17, 2002 International Filing Date: Jul 9, 2001
IPC: G06K 19/04
G06K 19/077
Applicants: SCHLUMBERGER SYSTÈMES
EL YAMANI, Hayat
LIMELETTE, Yann
PERBEN, Cédric
SCHLUMBERGER MALCO, INC.
Inventors: EL YAMANI, Hayat
LIMELETTE, Yann
PERBEN, Cédric
Title: TRANSPARENT DATA CARD
Abstract:
A data card comprises a data storage medium embedded in a card body. The card body comprises a filter layer (5) having substantially the same dimensions in terms of length and width as the card body. The filter layer is substantially transparent to electromagnetic radiation in a wavelength range that comprises electromagnetic radiation perceptible by the human whereas the filter layer is substantially opaque to electromagnetic radiation in another wavelength range.