Fresnel Zone Transforms in Spatially Incoherent Illumination

摘要

Two-dimensional sine, cosine, and Fourier transforms are obtained for objects illuminated by spatially incoherent, bandlimited light. A lensless Fresnel zone processor consisting of a double-imaging interferometer, a CCD array, and a digital computer is described and analyzed. Excellent bias removal and shot-noise level performance are obtained using a 14-bit digitizer. Experimental optical transforms are presented for an offset circular aperture and for a binary zone plate plate transmittance. The space-bandwidth product is derived, and excellent comparison with experiment is obtained. (Author)