We describe three simple pupil function filters that, in conjunction with a confocal optical system, result in a transfer function that is constant for all spatial frequencies up to the cutoff. We confirm our predictions experimentally by considering a straight-edge object. Edge gradients up to 2.36 times as sharp as the unapodized confocal case are obtained.
© 1991 Optical Society of America
Original Manuscript: March 4, 1991
Published: July 15, 1991
T. Wilson and S. J. Hewlett, "Superresolution in confocal scanning microscopy," Opt. Lett. 16, 1062-1064 (1991)