Method of designing linearization double-linkage continuous zoom lens

A kind of linearization double-linkage continuous zoom lens was proposed. This system utilized the simplified configuration of the conventional doublelinkage continuous zoom optic system with mechanical compensation , its zoom group and compensation group both used linear motion, and the zooming cam mechanism for controlling the curvilinear motion discipline of zoom group was omitted . This configuration had a few image displacement, however, it could not influence the image quality when the image displacement was controlled in allowed range. In addition, the principle and method for designing linearization double-linkage zoom lens were given.