US 5,331,443 · Granted 1994-07-19
Laser engraved verification hologram and associated methods
A method for increasing the authentication effect of a verification hologram to be affixed to a protected document includes laser etching individualized indicia into the reflective layer of each hologram produced en masse on a moving, continuous web. The laser is finely focused and guided by a computer which records the data used to form the selected indicia, such data being referenced for comparison to provide verification of authenticity upon presentation by a bearer. In one embodiment, the data used to create the indicia is generated by a computer program which may include a random number generator.
Patent details
- Publication number
- US 5,331,443
- Filing date
- 1992-07-31
- Grant date
- 1994-07-19
- Assignee
- Crown Roll Leaf, Inc.
- Inventor(s)
- STANISCI; JOSEPH J.
- CPC class
- G03H1/18
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