High security spectral code strip

Details High security spectral code strip High security spectral code strip

1992-12-29

1995-05-02

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235454, G06K 710

Patent

active

054121957

ABSTRACT:
An encoded hologram strip including a plurality of hologram digits linearly arranged along a longitudinal direction, each hologram digit including at least 0 parallel fringe reflection holograms wherein each parallel fringe hologram is constructed to diffract playback light having a predetermined wavelength and incidence angle at a diffraction angle that is substantially equal to the playback incidence angle.

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patent: 4591242 (1986-05-01), Broockman
patent: 4930847 (1990-06-01), Cederquist
patent: 5142383 (1992-08-01), Mallik
Tedesco J. M. et al., "Principles and Spectroscopic . . . " Analytical Chem. vol. 65, No. 9, May 1, 1993.

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