Optical signal processor for anti-counterfeiting and security systems

Author

Horner, Joseph L. ; Javidi, Bahram

Author_Institution

Rome Lab., Hanscom AFB, MA, USA

Volume

1

fYear

1994

fDate

31 Oct-3 Nov 1994

Firstpage

145

Abstract

Summary form only given. A nonlinear joint transform correlator (JTC) architecture can be used to verify the authenticity of the card. The complex mask and an image of a corresponding reference phase mask are illuminated by coherent light in the input plane of a JTC. The interference between the Fourier transforms of the two input images is produced by a lens and is square-law detected to obtain the joint power spectrum which is inverse Fourier transformed to produce the correlation between the input mask and the reference mask

Keywords

security of data; Fourier transform image interference; anti-counterfeiting; coherent light; complex mask; credit card authenticity checks; input images; input plane; inverse Fourier transformed; joint power spectrum; lens; nonlinear joint transform correlator; optical correlation; optical signal processor; reference mask; reference phase mask; security systems; square-law detected; Charge coupled devices; Correlators; Counterfeiting; Credit cards; Holographic optical components; Optical films; Optical refraction; Optical sensors; Phase detection; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Society Annual Meeting, 1994. LEOS '94 Conference Proceedings. IEEE

Conference_Location

Boston, MA

Print_ISBN

0-7803-1470-0

Type

conf

DOI

10.1109/LEOS.1994.586935

Filename

586935