Methods to Calibrate and Scale Axial Distances in Confocal Microscopy as a Function of Refractive Index

http://www.leica-microsystems.com/science-lab/hyvolution/methods-to-calibrate-and-scale-axial-distances-in-confocal-microscopy-as-a-function-of-refractive-index/

Application example of HyVolution Super-Resolution – Accurate distance measurement in 3D confocal microscopy is important for quantitative analysis, volume visualization and image restoration. However, axial distances can be distorted by both the point spread function (PSF) and by a refractive-index mismatch between the sample and immersion liquid, which are difficult to separate. Additionally, accurate calibration of the axial distances in confocal microscopy remains cumbersome, although several high-end methods exist. In this paper we present two methods to calibrate axial distances in 3D confocal microscopy that are both accurate and easily implemented.

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