. "Fourier Optics" . "Fourier phase" . "section 1.3" . "Fourier theory" . "low-pass filter" . "Fourier domain" . "section 1.5" . "section 6.1.3" . "section 6.2" . . "Fourier transforming property of lens" . "Fourier components" . "next section" . "actual equation" . . . . "paraxial wave equation" . "Fourier transforming properties of a lens" . "section 5" . "Fourier optics" . . . "section 6.1" . . "Fourier optics#4F Correlator" . . "Fourier plane" . . "Fourier optics" . "Fourier method" . "Fourier phases" . . "4f correlator" .