Thin-lens Theory of Zoom Systems

Abstract

The Gaussian design of optically compensated zoom systems is described and the procedure is applied to the three-lens and four-lens systems. A method for the control of the primary aberrations of thin lens zoom systems during zooming is described, which involves the solution of sets of simultaneous quadratic equations by a damped least squares technique. Examples are given of the procedure when applied to the previously designed three and four-lens optically compensated systems. Finally the method is applied to the design of a thin lens triplet with specified values of the primary aberrations, for use in conjunction with the above mentioned zoom systems.