波以这种方式叠加,以致於波的相位梯度(phase gradient)往回指向某些区域。在数学上来说,电的项(terms)必须要超过(… only-perception.blogspot.com|基于4个网页 2. 相梯度 发育的「相梯度」(phase gradient)理论,亦称为钟面模型(clockface model),该模型论点之一是:发育中存在一个连续的 … ...
Phase DeviationSpeckle PatternsAn algorithm is presented for the direct measurement of the phase gradient of an object's spatial-frequency spectrum from stellar speckle images. The process is based on the differentiation properties of Fourier transforms. Bias terms inherent to the process at low light...
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An algorithm is presented for the direct measurement of the phase gradient of an object's spatial-frequency spectrum from stellar speckle images. The process is based on the differentiation properties of Fourier transforms. Bias terms inherent to the process at low light levels depend on object asy...
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Feinberg, "Self-Pumped Continuous-Wave Phase Conjugator Using Internal Reflection," Optics Letters, vol. 7, No. 10, Oct. 82, pp. 486-488. Brody, "Phase-Gradient Contrast Using Barium Titanate Optical Phase Conjugators," Technical Digest of the Conference on Lasers and Electro-Optics, Optical...
et al. Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces. Nature Nanotech 12, 675–683 (2017). https://doi.org/10.1038/nnano.2017.50 Download citation Received01 June 2016 Accepted02 March 2017 Published17 April 2017 Issue DateJuly 2017 DOIhttps://doi....
An apparatus for optically imaging a sample comprises: a broadband laser (1); a spatial disperser (2) for spectrally encoding the gradient phase contrast information; a passive phase-gradient-encoded signal multiplexer (5) for performing passive phase- gradient-encoded signal multiplexing; and means...
Twitter Google Share on Facebook PGA (redirected fromPhase Gradient Autofocus) Category filter: AcronymDefinition PGAProfessional Golfers' Association of America(since 1916; Palm Beach Gardens, Florida) PGAPin Grid Array PGAProducers Guild of America ...
The phase gradient autofocus (PGA) technique for phase error correction of spotlight mode synthetic aperture radar (SAR) imagery is examined carefully in the context of four fundamental signal processing steps that constitute the algorithm. We demonstrate that excellent results over a wide variety of ...