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Ferroelectric optical image comparator using PLZT thin films

Ferroelectric optical image comparator using PLZT thin films

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© The Institution of Electrical Engineers
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A PLZT thin film device has been constructed in which the photoinduced current represents the dot product between a stored image and an image projected onto its surface. One-dimensional autocorrelations have been performed by measuring this current while displacing the projected image. This device has the potential to perform as a high-resolution, high-speed optical comparator.

Inspec keywords: ferroelectric devices; photoconducting devices; optical information processing

Other keywords: photoinduced current; stored image; PLZT/int; autocorrelations; dot product; ferroelectric optical image; projected image; high-speed optical comparator

Subjects: Other optical system components; Optical information, image and video signal processing; Piezoelectric and ferroelectric devices; Photoelectric devices; Image processing and restoration; Optical elements, devices and systems

References

    1. 1)
      • C.E. Land . Optical information storage and spatial light modulation in PLZT ceramics. Optical Eng. , 317 - 326
    2. 2)
      • Land, C.E.: `Longitudinal electrooptic effects in polycrystalline PLZT thin films', Proceedings of the American Ceramics Society, May 1988, Cincinnati, Ohio, USA.
    3. 3)
      • F. Micheron , J.M. Rouchon , M. Vergnolle . A ferroelectric image memory. Ferroelectrics , 15 - 18
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