M. Martinez-corral et al., An experiment to study the structure of the focal volume in apertured focusing systems, EUR J PHYS, 22(4), 2001, pp. 361-369
We present a simple experiment, specifically designed for students of under
graduate optics courses, where the influence of an aperture stop position o
n the three-dimensional structure of the focal volume of focusing systems i
s studied. The experiment, which involves only simple optical elements, per
mits an undergraduate student to generate different focal structures by sim
ply axially displacing the aperture stop.