Title :
Optical signal processor for anti-counterfeiting and security systems
Author :
Horner, Joseph L. ; Javidi, Bahram
Author_Institution :
Rome Lab., Hanscom AFB, MA, USA
fDate :
31 Oct-3 Nov 1994
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;
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
DOI :
10.1109/LEOS.1994.586935
