Cryptography – By modifying optical image
Patent
1989-08-03
1991-03-26
Buczinski, Stephen C.
Cryptography
By modifying optical image
342 6, 342 42, 250237G, 35016217, 235454, 235457, 235470, 365124, 365125, G02B 2744
Patent
active
050036009
ABSTRACT:
A finely detailed defraction grating is applied to an object as an identifier or tag which is unambiguous, difficult to duplicate, or remove and transfer to another item, and can be read and compared with prior readings with relative ease. The exact pattern of the defraction grating is mapped by diffraction moire techniques and recorded for comparison with future readings of the same grating.
REFERENCES:
patent: 3624605 (1971-11-01), Aagard
patent: 3643216 (1972-02-01), Greenaway et al.
patent: 4011435 (1977-03-01), Phelps et al.
patent: 4014602 (1977-03-01), Ruell
patent: 4150781 (1979-04-01), Silverman et al.
patent: 4184700 (1980-01-01), Greenaway
patent: 4400616 (1983-08-01), Chevillat et al.
patent: 4506914 (1985-03-01), Gobeli
patent: 4658147 (1987-04-01), Eldering
patent: 4725111 (1988-02-01), Weitzen et al.
patent: 4746830 (1988-05-01), Holland
patent: 4816322 (1989-03-01), Pickering
patent: 4820006 (1989-04-01), Constant
patent: 4837425 (1989-06-01), Edwards
Jurgen R. Meyer-Arendt, Intro. to Classical and Modern Optics; (Prentice-l, 1972; pp. 241, 242, 425, and 426).
Perry et al., IBM Tech. Discl. Bull., (vol. 12, No. 8; 1/70).
Deason Vance A.
Ward Michael B.
Albrecht John M.
Buczinski Stephen C.
Cordell Helen S.
Gregory Bernarr Earl
Moser William R.
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