title: Modification of the formulas for third-order aberration coefficients.
abstract: New parameters for calculation of third-order aberration coefficients (Seidel aberration coefficients) are introduced. The formulas for Seidel aberration coefficients are linear in these new variables. With these new variables it is possible to calculate the shape and the refractive index of the glass of the individual lenses of the optical system, which was not possible before.
authors.affiliation: Department of Physics, Czech Technical University, Prague. miks@fsv.cvut.cz
authors.forename: Antonín
authors.initials: A
authors.lastname: Miks