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
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
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
Point spread function of hexagonally segmented telescopes by new symmetrical formulation
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty3052
Abstract: A point spread function of hexagonally segmented telescopes is derived by a new symmetrical formulation. By introducing three variables on a pupil plane, the Fourier transform of pupil functions is derived by a three-dimensional Fourier… read more here.
Keywords: hexagonally segmented; segmented telescopes; spread function; point spread ... See more keywords
Bistatic SAR Point Spread Function Analysis for Close Proximity Geometries
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2022.3214188
Abstract: The goal of this project is to describe the spatially variant imaging performance of bistatic SAR imaging using a localized spatially invariant approximation, so as to use spatial Fourier analysis. Bistatic synthetic aperture radar (BSAR)… read more here.
Keywords: spread function; bistatic sar; analysis; point spread ... See more keywords
Blind technique for point spread function equalization with application to the Multi-Order Solar Extreme Ultraviolet Spectrograph
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Astronomical Telescopes, Instruments, and Systems"
DOI: 10.1117/1.jatis.4.2.028002
Abstract: Abstract. When combining remote sensing data from multiple instruments or multiple imaging channels, differences in point spread function (PSF) can lead to systematic error. If the PSFs are not well known, then it is difficult… read more here.
Keywords: multi order; spread function; point spread; order solar ... See more keywords
Three-dimensional point spread function estimation method for mid-wave infrared microscope imaging.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.470508
Abstract: A three-dimensional point spread function experimental estimation method based on the system's focal plane array spatial local impulse response of a mid-wave infrared microscope is presented. The method uses several out-of-focus two-dimensional point spread function… read more here.
Keywords: spread function; point spread; dimensional point;
Point spread function and depth-invariant focal sweep point spread function for plenoptic camera 2.0.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.009947
Abstract: This paper derives a mathematical point spread function (PSF) and a depth-invariant focal sweep point spread function (FSPSF) for plenoptic camera 2.0. Derivation of PSF is based on the Fresnel diffraction equation and image formation… read more here.
Keywords: spread function; depth; point spread;