An appropriate form for the expansion of an aberration function for an optical system of high numerical aperture is considered. The effects on the defocus signal of a confocal imaging system of aberrations, high aperture, finite Fresnel number, system configuration, and surface tilt are discussed.
© 1988 Optical Society of America
Original Manuscript: November 19, 1987
Published: November 15, 1988
Colin J. R. Sheppard, "Aberrations in high aperture conventional and confocal imaging systems," Appl. Opt. 27, 4782-4786 (1988)