Access control system
AssigneeVisual Methods, Inc.
InventorHerman Kruegle
Life of this patent
Estimating the term…
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.
Claims7
An improved identification card of the type that includes a first region bearing visible indicia descriptive of the authorized holder of the card, wherein the improvement comprises:
- a second region of said card bearing further visible indicia descriptive of said holder, said further visible indicia being recorded on a photographic transparency;
- and
- means for inhibiting detection of said further visible indicia when said card is illuminated by visible radiation of normal intensity and wavelength, said inhibiting means comprising:
- a reflecting medium downstream of said photographic transparency;
- and
- an optical filter upstream of said photographic transparency.
An identification card which comprises, in order:
- a first, transparent, protective member;
- a second member comprising a first region bearing a photographic likeness of the authorized holder of said card and a second region comprising a filter substantially opaque to visible radiation but substantially transparent to infra-red or ultra-violet radiation;
- a third member including a first region substantially aligning with the second region of said second member, said first region comprising a photographic transparency bearing an image of the identical authorized holder depicted in the likeness of the first region of said second member;
- a fourth member including a retroflective region substantially aligning with the first region of said third member;
- and
- a fifth member for rigidly supporting said first through fourth members.
Dependencies are inferred from the claim text.