Spatial integrating optical correlator for verifying the authent

Details Spatial integrating optical correlator for verifying the authent Spatial integrating optical correlator for verifying the authent

1997-07-11

1998-11-24

Couso, Jose L.

Image analysis

Pattern recognition

Template matching

382278, 359561, G06K 976, G02B 2746

Patent

active

058419071

ABSTRACT:
A method of verifying the authenticity of an object is disclosed employing a spatial integrating optical correlator. An unreadable and hence non-counterfeitable mask (e.g., a. complex mask or a phase mask) is coupled to the object and the optical correlator compares the mask with a reference mask on which it is scanned over. The correlator produces a correlation spot or image having an intensity which exceeds a given level if the mask is genuine. An alternate embodiment includes a fingerprint or other personalized pattern bonded to the mask, and the fingerprint or other personalized pattern on the card is compared to a reference fingerprint or other personalized pattern of the card holder for added security.

REFERENCES:
patent: 3716301 (1973-02-01), Caulfield
patent: 3995948 (1976-12-01), Abe et al.
patent: 4588260 (1986-05-01), Horner
patent: 4706296 (1987-11-01), Pedotti et al.
patent: 4765714 (1988-08-01), Horner et al.
patent: 4826285 (1989-05-01), Horner
patent: 4832447 (1989-05-01), Javidi
patent: 4948258 (1990-08-01), Caimi
patent: 5040140 (1991-08-01), Horner
patent: 5214716 (1993-05-01), Refregier et al.
patent: 5251222 (1993-10-01), Hester et al.
patent: 5309523 (1994-05-01), Iwaki et al.
patent: 5485312 (1996-01-01), Horner et al.

Affiliated with

Also associated with

Rating

Spatial integrating optical correlator for verifying the authent does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spatial integrating optical correlator for verifying the authent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial integrating optical correlator for verifying the authent will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1712243