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Optics Letters

Optics Letters


  • Vol. 23, Iss. 18 — Sep. 15, 1998
  • pp: 1483–1485

Binary computer-generated holograms for security applications from a synthetic double-exposure method by electron-beam lithography

Nobukazu Yoshikawa, Masahide Itoh, and Toyohiko Yatagai  »View Author Affiliations

Optics Letters, Vol. 23, Issue 18, pp. 1483-1485 (1998)

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We have developed a new multiplexing method for producing binary computer-generated holograms (CGH’s) for security applications. This method is based on double recording of two types of coding method upon binary CGH’s. The CGH synthesized by the proposed method can have multiple image planes from the region close to the hologram (image region) to infinity (Fraunhofer region) without severe degradation of reconstructed images in the image region. A CGH containing simultaneous image- and Fourier-type holograms is fabricated by electron-beam lithography. Some experimental results are presented.

© 1998 Optical Society of America

OCIS Codes
(090.1760) Holography : Computer holography
(090.1970) Holography : Diffractive optics
(090.2890) Holography : Holographic optical elements
(090.4220) Holography : Multiplex holography

Nobukazu Yoshikawa, Masahide Itoh, and Toyohiko Yatagai, "Binary computer-generated holograms for security applications from a synthetic double-exposure method by electron-beam lithography," Opt. Lett. 23, 1483-1485 (1998)

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