Security arrangement

Details Security arrangement Security arrangement

1987-07-31

1989-06-06

Pellinen, A. D.

Registers

Coded record sensors

Particular sensor structure

235382, 235454, 235488, 350 36, 350 375, G06K 710, G03H 126

Patent

active

048374253

ABSTRACT:
A security arrangement includes a token in the form of a thin lamina which co-operates with a receptor. The token includes an optically readable pattern in the form of a bar code, and a thin film holographic reflector which deflects the light which is modified by the bar code onto an optical sensor. The optical sensor is positioned such that the light will not reach it in the absence of a holographic reflector.

REFERENCES:
patent: 4108367 (1978-08-01), Hannan
patent: 4362930 (1982-12-01), Ehrat
patent: 4464566 (1984-08-01), Silverman

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