Related Experiment Video
Updated: Mar 11, 2026

Confocal Microscopy Reveals Cell Surface Receptor Aggregation Through Image Correlation Spectroscopy
Published on: August 2, 2018
Effect of the correlation function on the focal shift of a partially coherent beam
Abstract:
It is known that the focal shift is closely related with the Fresnel number of the lens system, the amplitude, and the spatial coherence of the light beam. In this paper, we investigate the focusing properties of a partially coherent beam with nonconventional correlation function, named a generalized multi-Gaussian correlated Schell-model beam, through deriving the analytical expression for its effective beam width. We find that the focal shift is also affected by the structure parameter of the correlation function. Our results provide a novel way for controlling the focal shift.
More Related Videos
10:39Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
08:44Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
Published on: August 22, 2017
Related Concept Videos
Interference and Diffraction
Doppler Effect - II
Potential Due to a Polarized Object
Doppler Effect - I
Deflection of a Beam
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
Castigliano's Theorem: Problem Solving