The aberrations of optical systems formed by spherical surfaces whose centers coincide and lie on coincident object and image planes are analyzed. Formulas are obtained for estimating the aberrations of a broad meridional beam and the distortion. It is shown that, when certain conditions are satisfied, the circle of confusion for off-axis image points can acquire a shape close to rectangular and square in such systems. © 2005 Optical Society of America
A. P. Grammatin and E. A. Demidova, "Aberrational properties of optical systems consisting of confocal surfaces," J. Opt. Technol. 72, 177-181 (2005)
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