Diffraction, Fourier Optics and Imaging
نویسنده
چکیده
منابع مشابه
Depth-of-Field Comparison between Real/Virtual and Focused Mode Integral Imaging Using Fourier Optics
The depth of field of real/virtual and focused mode in three-dimensional integral imaging is taken into account by using the Fourier optics approach and considering the effects of diffraction and defocus aberration. The concepts of point spread function and optical transfer function are applied to three-dimensional integral imaging system and used to investigate the depth of field for both modes.
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Coherent diffraction imaging (CDI) for visualizing objects at atomic resolution has been realized as a promising tool for imaging single molecules. Drawbacks of CDI are associated with the difficulty of the numerical phase retrieval from experimental diffraction patterns; a fact which stimulated search for better numerical methods and alternative experimental techniques. Common phase retrieval ...
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Diffraction images record angle-resolved distribution of scattered light from a particle excited by coherent light and can correlate highly with the 3D morphology of a particle. We present a jet-in-fluid design of flow chamber for acquisition of clear diffraction images in a laminar flow. Diffraction images of polystyrene spheres of different diameters were acquired and found to correlate highl...
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The average intensity spectrum is derived for an object illuminated and viewed through the same random screen. This double passage is shown to give an average image that contains diffraction-limited information about the Fourier modulus of the object amplitude.
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The fractional Fourier transform (FrFT) is used for the solution of the diffraction integral in optics. A scanning approach is proposed for finding the optimal FrFT order. In this way, the process of diffraction computing is speeded up. The basic algorithm and the intermediate results at each stage are demonstrated.
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