Propagation of an axially symmetrical beam through an apodizer comprising a circular serrated aperture and a spatial filter is considered on the basis of the parabolic equation solution. In Part II, the equation is solved for uniform and Gaussian beams with a flat wavefront propagating from the spatial filter pinhole to its exit. It is shown that serrations with complex shapes (for instance, cosine or parabolic) have no advantage over a simple triangular shape: practically the same beam profiles can be obtained with triangular serrations of slightly different size.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1364/AO.58.004910 | DOI Listing |
Nature
August 2024
Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.
The mouse small intestine shows profound variability in gene expression along the crypt-villus axis. Whether similar spatial heterogeneity exists in the adult human gut remains unclear. Here we use spatial transcriptomics, spatial proteomics and single-molecule fluorescence in situ hybridization to reconstruct a comprehensive spatial expression atlas of the adult human proximal small intestine.
View Article and Find Full Text PDFEur J Protistol
August 2024
School of Life Sciences, Nanjing Normal University, Nanjing 210023, Jiangsu Province, China. Electronic address:
After Gulielmina was erected and Ophiotheca was resurrected based on some species originally included in Perichaena (Trichiaceae, Trichiales, Myxomyxetes), some specimens from the Herbarium of Fungi of Nanjing Normal University previously identified as Perichaena species were reexamined from morphological and two-gene (nuclear 18S rDNA and elongation factor-1 alpha) phylogenetic perspectives. In this study, two new myxomycete species, Gulielmina subreticulospora and Ophiotheca dictyospora, are described. Gulielmina subreticulospora shows the following character combination: branched plasmodiocarps, single peridium with circular protrusions in the inner surface, capillitium (2.
View Article and Find Full Text PDFSyst Parasitol
January 2024
Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
Two new species of Scyphophyllidium Woodland, 1927 are described from the Hooktooth shark, Chaenogaleus macrostoma (Bleeker), from the Persian Gulf, Iran. Scyphophyllidium hormuziense n. sp.
View Article and Find Full Text PDFChiral metasurfaces with tunable or switchable circular dichroism (CD) responses hold great potential for advanced optical devices. In this work, we theoretically propose and numerically demonstrate a chiral metasurface absorber composed of periodically serrated GeSbTe (GST) resonators. By harnessing strong plasmonic resonance using the gradient geometry, we achieve a strongly enhanced chiral response with a CD value of 0.
View Article and Find Full Text PDFZookeys
March 2022
Department of Biology, College of Natural Sciences, Chosun University, Gwangju 61452, Republic of Korea.
Two new species, and are reported from South Korea. can be identified by the following character states: whole body has dark brown chromatophores dorsally, lateral margins of the cephalon are smooth and narrowing anteriorly, and basis of pereopods has serrated cuticular scales superiorly. can be identified by the following character states: the cephalon, pereonite 4, and pleotelson have dark brown chromatophores dorsally, lateral margins of the cephalon are smooth and parallel each other, and flagellar article 1 of the antenna is swollen and semi-circular in shape.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!