Spatial resolution

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Spatial resolution or detector resolution is a term from the field of physics. The spatial resolution describes a spatial distance within a measured detector signal at which two different signals can still be separated (detail recognizability). The detector resolution can also be a time interval within the detector signal. The measured variables to be determined can be, for example, temporal variations in the number of particles or the energy distribution of a particle beam .

detection

There are two different options available for determining the spatial resolution.

  1. The determination of the Modulation Transfer Function (MTF) from the measurement of the edge of a cylinder. This function shows a contrast amplitude depending on the spatial resolution. The ISO standard 15708-2: 2002 describes the calculation.
  2. The determination of the contrast between the material and the background depending on the structure size of the line pairs.

In order to assess the optical resolution or structure resolution, the modulation transfer function is primarily used, with which it is determined how many adjacent black and white line pairs are still differentiated. The higher the number of line pairs, the better the lens used. This is also called limit dissolution.

See also

literature

  • Arthur Berger: Illustration of element distributions with high spatial resolution in the transmission electron microscope . Technical University, Darmstadt 1993, OCLC 231577487 .
  • Sylvia Wilharm: Interactive variation of spatial resolution and noise for applications in flat-panel CT . 2009, OCLC 635352359 .
  • Thomas Gemming: Quantitative investigation of material structures with atomic spatial resolution . Max Planck Inst. for metal research, Stuttgart 1998, OCLC 75973563 .

Web links

Individual evidence

  1. ↑ spatial resolution. In: Lexicon of Physics. Spektrum.de, accessed on September 22, 2016 .
  2. ^ Andreas Staude, Jürgen Goebels, BAM Federal Institute for Materials Research and Testing: Spatial Resolution in Computed Tomography - Comparison of MTF and Line Pair Structures. (PDF) In: DGZfP Annual Conference 2011 - Mon.3.B.1.
  3. ↑ ISO 15708-2: 2002 - Non-destructive testing - Radiation methods - Computed tomography - Part 2: Examination practices. In: iso.org. ISO, accessed September 22, 2016 .
  4. ↑ Lars Fermum: limiting resolution and MTF. vision-doctor.de, accessed on September 22, 2016 .