Quasi-Fourier transform of an object from a Fresnel hologram
Abstract
The reported procedure follows a different order than that employed by Stroke (1965) in his process. In other words, the spherically diverging beam is used as a reference beam under reconstruction while Stroke uses it when recording. The result reported may also be interpreted in terms of a virtual Fourier transformation. It has been shown by Knopp and Becker (1978) that, if a transparency is illuminated with a diverging beam, a virtual transform is produced at the source of the expanding waves. In the reported procedure, a diverging beam off axis is used to produce a virtual Fourier transform on the axis.
- Publication:
-
Applied Optics
- Pub Date:
- April 1979
- DOI:
- 10.1364/AO.18.000950
- Bibcode:
- 1979ApOpt..18..950G
- Keywords:
-
- Fourier Transformation;
- Fresnel Diffraction;
- Holography;
- Wave Front Reconstruction;
- Near Fields;
- Photographic Recording;
- Signal Processing;
- Virtual Properties;
- Instrumentation and Photography;
- FOURIER TRANSFORMS;
- HOLOGRAPHY