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Glossary
Aperture angle of a microscope objective
AU
Airy unit (diameter of Airy disc)
dpix
Pixel size in the object plane
FWHM
Full width at half maximum of an intensity
distribution (e.g. optical slice)
n
Refractive index of an immersion liquid
NA
Numerical aperture of a microscope objective
PH
Pinhole; diaphragm of variable size arranged in
the beam path to achieve optical sections
PMT
Photomultiplier tube (detector used in LSM)
PSF
Point spread function
RU
Rayleigh unit
SNR
Signal-to-noise ratio
337_Zeiss_Grundlagen_e 25.09.2003 16:16 Uhr Seite 29