A researcher whose team examined the use of fluorescent microspheres as optical calibration objects. Their confocal-microscopy study shows how the marker’s finite size changes the measured point spread function, linking the physical test object with the apparent resolving performance of the instrument.[ref]
Measurement of point-spread function (PSF) for confocal fluorescence microscopy by InCheon Song and others. Author list and abstract: fluorescent-particle size, measured response and experimental validation
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