Access control system

Details Access control system Access control system

1978-01-11

1979-11-27

Bilinsky, Z. R.

Printed matter

Calendar

40 22, G02B 2714, G09F 302

Patent

active

041757750

ABSTRACT:
A photo I.D. card having the photograph, and/or signature, and/or coded indicia of an authorized holder which is visible under ordinary room illumination also carries a second photograph of the user. The second photograph is in the form of a transparency which is sandwiched between a piece of retroflective material and an optical filter which is opaque to light of normal intensity and wavelength but which is transparent to infra-red or ultra-violet radiation. Also disclosed is apparatus for reading both the visible and invisible photographs, signature, and data on the card by means of a CCTV system. Any attempt to alter or forge the I.D. card can, thus, be readily detected.

REFERENCES:
patent: 2397272 (1946-03-01), Land
patent: 3204354 (1965-09-01), Berger
patent: 3279826 (1966-10-01), Rudershausen et al.
patent: 3640009 (1972-02-01), Komiyama

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