ADJUSTMENT OF IMAGE LOCATIONS IN ZOOM SYSTEMS

A simple method of determination of the derivatives of image locations with respect to both system parameters and the movements of the syste m components is proposed. A method of two adjusting displacements is s uggested basing on selection of two adjusting components and removal o f the deviation of the image position in the two extreme arrangements of the zoom system. The simulation process of a deviated zoom system i n its most unfavourable form both in plus and in minus is described an d the adjustment of the image position discussed. As an example the ad justment of a four-element zoom objective is given.