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Proceedings Paper

Fourier transform property of lens based on geometrical optics
Author(s): Suganda Jutamulia; Toshimitsu Asakura
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Paper Abstract

Coherent optical information processing is almost entirely based on the Fourier transform property of a lens. A Fourier transform lens is actually an ordinary lens. If the input transparency is placed in the front focal plane of the lens and illuminated with coherent collimated light (planewave), the amplitude function in the back focal plane of the lens will be the Fourier transform of the input transparency as shown in Fig. 1. A 4-f coherent optical processor consists of two lenses as shown in Fig. 2, thus it performs two Fourier transforms successively. The first lens transforms the input function from space domain into frequency domain, and the second lens transforms back the frequency function from frequency domain to the output function in space domain.

Paper Details

Date Published: 16 September 2002
PDF: 6 pages
Proc. SPIE 4929, Optical Information Processing Technology, (16 September 2002); doi: 10.1117/12.483195
Show Author Affiliations
Suganda Jutamulia, Blue Sky Research (United States)
Toshimitsu Asakura, Hokkai-Gakuen Univ. (Japan)

Published in SPIE Proceedings Vol. 4929:
Optical Information Processing Technology
Guoguang Mu; Francis T. S. Yu; Suganda Jutamulia, Editor(s)

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