Abstract
The significance of scale factors and cascade of optical fractional
Fourier transform is emphasized. Exact and cascadable fractional Fourier
transforms in practical applications mandate that the image scale be the
reciprocal of the scale of the input plane controlled by the optical setup.
The practical setup of the optical fractional Fourier transform must be
without any quadratic phase term at the spectrum plane.
© 1997 Optical Society of America
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