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Showing 1 to 2 of 2 for “"Fresnel zone pattern"”.
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Twin-image problems in optical scanning holography
… beam can be a time-dependent Gaussian apodized Fresnel zone pattern. We derive the resolution achievable with such a scanning beam. We then discuss the use of a larger and a smaller Fresnel zone pattern for holographic recording to investigate twin-image noise which results in the unwanted image …
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Three-Dimensional Fluorescence Microscopy by Optical Scanning Holography
… heterodyned laser field consisting of a Fresnel zone pattern. A unique acousto-optic modulator configuration is employed to generate a suitable heterodyne frequency for excitation of the fluorescent object. The optical response of a solution containing a high concentration of 15 um …