| || A condition for achromatism of three lenses
Author : Pardharsaradhi, T.V.
Source : Defence Science Journal ; Vol:11(2) ; 1961 ; pp 112-115
Subject : 535 Optics
Keywords : Achromatism;Hartmann;Wave
Abstract : In this paper is given an account of an attempt at obtaining a general condition for the constancy of power for all wave lengths, in other words, total achromatism of a system of three separated lenses, in terms of Hartmann constants. The solution of the general equation by making the Hartmann constants a/Sub/1, a/Sub/2 and a/Sub/3 equal to unity, is naturally the simplest and the condition of achromatism arrived at is shown to be that of three lenses in contact.