Seeing Measurements with the Merak H$\upalpha$ Telescope
Sign Up to like & getrecommendations! Published in 2021 at "Solar Physics"
DOI: 10.1007/s11207-021-01807-3
Abstract: The parameter-search method (PSM) established by Rengaswamy, Ravindra, and Prabhu (Solar Phys. 294, 5, 2019) for measuring the terrestrial atmospheric seeing from long-exposure solar H $\upalpha$ images is further validated – through simulations – to… read more here.
Keywords: measurements merak; spread function; merak upalpha; seeing measurements ... See more keywords
Centroids computation and point spread function analysis for reverse Hartmann test
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2016.11.063
Abstract: Abstract This paper studies the point spread function (PSF) and centroids computation methods to improve the performance of reverse Hartmann test (RHT) in poor conditions, such as defocus, background noise, etc. In the RHT, we… read more here.
Keywords: computation; spread function; point spread; super gaussian ... See more keywords
Optimization of Fresnel-zones-based Double Helix Point Spread Function and measurement of particle diffusion coefficient
Sign Up to like & getrecommendations! Published in 2022 at "Optics Communications"
DOI: 10.1016/j.optcom.2021.127411
Abstract: Abstract In the field of microscopic imaging, the double-helix point spread function (DH-PSF) based on the Fresnel zones is often used to locate the three-dimensional position of particles. The lower transfer function efficiency makes it… read more here.
Keywords: diffusion; fresnel; point spread; double helix ... See more keywords
Exploring the Parameter Space of Point Spread Function Determination for the Scanning Electron Microscope—Part II: Effect on Image Restoration Quality
Sign Up to like & getrecommendations! Published in 2019 at "Microscopy and Microanalysis"
DOI: 10.1017/s1431927619014831
Abstract: Abstract Point spread function (PSF) deconvolution is an attractive software-based technique for resolution improvement in the scanning electron microscope (SEM) because it can restore information which has been blurred by challenging operating conditions. In Part… read more here.
Keywords: part; quality; restoration; image ... See more keywords
High Precision 3D Single Molecule Microscopy Using the Double Helix Point Spread Function
Sign Up to like & getrecommendations! Published in 2020 at "Microscopy and Microanalysis"
DOI: 10.1017/s1431927620018620
Abstract: Optical diffraction limits resolution in visible spectrum to 200 nm in the lateral dimension (x-y) and 500 nm in axial dimension (z). Recent advances in engineering properties of fluorescent proteins and dyes have enabled nanometer… read more here.
Keywords: high precision; single molecule; microscopy; spread function ... See more keywords
Deconvolution of light sheet microscopy recordings
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-53875-y
Abstract: We developed a deconvolution software for light sheet microscopy that uses a theoretical point spread function, which we derived from a model of image formation in a light sheet microscope. We show that this approach… read more here.
Keywords: microscopy; point spread; deconvolution; light sheet ... See more keywords
Accurate phase retrieval of complex 3D point spread functions with deep residual neural networks.
Sign Up to like & getrecommendations! Published in 2019 at "Applied physics letters"
DOI: 10.1063/1.5125252
Abstract: Phase retrieval, i.e., the reconstruction of phase information from intensity information, is a central problem in many optical systems. Imaging the emission from a point source such as a single molecule is one example. Here,… read more here.
Keywords: phase; point; point spread; phase retrieval ... See more keywords
The chromatic Point Spread Function of weak lensing measurement in Chinese Space Station survey Telescope
Sign Up to like & getrecommendations! Published in 2023 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/acd589
Abstract: The weak gravitational lensing is a powerful tool in modern cosmology. To accurately measure the weak lensing signal, one has to control the systematic bias to a small level. One of the most difficult problems… read more here.
Keywords: weak lensing; spread function; chinese space; space station ... See more keywords
Demonstration of Gd-GEM detector design for neutron macromolecular crystallography applications
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Instrumentation"
DOI: 10.1088/1748-0221/18/04/p04023
Abstract: The European Spallation Source (ESS) in Lund, Sweden will become the world's most powerful thermal neutron source. The Macromolecular Diffractometer (NMX) at the ESS requires three 51.2 × 51.2 cm2 detectors with reasonable detection efficiency,… read more here.
Keywords: spread function; detector; neutron; point spread ... See more keywords
Automated clustering method for point spread function classification.
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty1504
Abstract: The point spread function (PSF) plays a very important part in image post-processing and high-precion astrometry and photometry. It is necessary to analyse the properties of the PSF before we use it to process data.… read more here.
Keywords: clustering method; spread function; point spread; method ... See more keywords
Turbulent and adaptive optics corrected point-spread functions as convolutive orders of the phase power spectral density
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2595
Abstract: Ground-based astronomy is severely limited by the atmospheric turbulence, resulting in a large Point-Spread-Function (PSF) and poor imaging resolution. Even imaging with Adaptive Optics (AO) cannot completely correct the aberrated wavefront, and a residual turbulence… read more here.
Keywords: psf; optics; point spread; power spectral ... See more keywords