Communications: electrical – Digital comparator systems
Patent
1976-08-26
1978-10-03
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
250550, 350 383, 350162SF, G06K 900
Patent
active
041186850
ABSTRACT:
A signature is holographically recorded for correlation and parallel procing against a large library of signatures. A transient electrical signal produces a pressure wave in an optical wavefront modulator where it is frozen in position by a picosecond laser. The modulated wavefront is made to interfere at a hologram plane with a reference wavefront which is converging to a focal point behind the hologram plane. Because the holograms are of the Fresnel type, the hologram plane may be partitioned off and a library of signatures may be recorded on the same hologram plane and addressed simultaneously. After processing, the reference wave is removed and the optical wavefront modulator illuminated by a continuous wave coherent source. If a signature, recorded on the hologram, is placed in the optical wavefront modulator, then the reference wave for that hologram is reconstructed and detected to identify that signature.
REFERENCES:
patent: 3427586 (1969-02-01), Lohmann
patent: 3483386 (1969-12-01), Jernigan
patent: 3486016 (1969-12-01), Faiss
patent: 3668405 (1972-06-01), Brooks et al.
patent: 3674331 (1972-07-01), Caulfield
patent: 3680943 (1972-08-01), Ogden et al.
patent: 3692380 (1972-09-01), Inagaki
patent: 3694657 (1972-09-01), Brooks
patent: 3822379 (1974-07-01), Brienza
patent: 3877776 (1975-04-01), Okino et al.
patent: 3984802 (1976-10-01), Lippel, Jr. et al.
patent: 3989347 (1976-11-01), Eschler
Boudreau Leo H.
The United States of America as represented by the Secretary of
LandOfFree
Holographic signature processor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Holographic signature processor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holographic signature processor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1804297