Optically-based methods and apparatus for performing document au

Details Optically-based methods and apparatus for performing document au Optically-based methods and apparatus for performing document au

1997-04-10

1999-05-11

Kim, Robert H.

Optics: measuring and testing

Document pattern analysis or verification

G06K9/74

Patent

active

059033401

ABSTRACT:
This invention teaches a method for authenticating a document. The method includes the steps of: (a) providing a document to be authenticated; (b) illuminating at least a portion of the document with laser light that exceeds a threshold fluence; (c) detecting a narrow band laser-like emission of at least one wavelength from the document in response to the step of illuminating; and (d) declaring the document to be authentic only if the laser-like emission is detected.

REFERENCES:
patent: 4437935 (1984-03-01), Crane, Jr.
patent: 4533244 (1985-08-01), Kaule et al.
patent: 4534398 (1985-08-01), Crane
patent: 5486022 (1996-01-01), Crane
patent: 5625456 (1997-04-01), Lawandy
"Photonic textile fibers", R. M. Balachandran et al., Applied Optics, Apr. 20, 1996, vol. 35, No. 12, pp. 1991-1994.
"The Efficient Use of Fluorescent WhiteningAgents in the Paper Industry", Clifford C. Roltsch et al., TAPPI Proceedings, Papermakers Conference, May 1987, pp. 87-99.

Affiliated with

Also associated with

Rating

Optically-based methods and apparatus for performing document au does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optically-based methods and apparatus for performing document au, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically-based methods and apparatus for performing document au will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-249287