Complex spatial filtering with binary masks.

@article{Brown1966ComplexSF,
  title={Complex spatial filtering with binary masks.},
  author={By Lester r. Brown and Adolf W. Lohmann},
  journal={Applied optics},
  year={1966},
  volume={5 6},
  pages={967-9}
}
Usually a hologram is produced by means of an interference experiment. Here, however, we let a computer- guided plotter draw the hologram. The plot, which has to be minified and recorded on film, contains no grey, only binary transmittance values. Our binary holograms yield reconstructed images of a quality equal to that of images obtained from usual holograms of comparable dimensions. When a Fourier hologram is inserted into the Fraunhofer plane of a coherent image forming system, it acts as a… CONTINUE READING
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