  In this paper, we propose a new approach to automatically retrieve the
first-order design of double-sided telecentric zoom systems with high
efficiency based on Particle Swarm Optimization (PSO) algorithms. We transform
the design problem to realize a zoom lens system with fixed positions of both
the front focal point and the rear focal point during zooming. We demonstrate
that the proposed algorithm is much more efficient than the Monte Carlo
algorithm in designing zoom systems with two fixed foci as well as a given zoom
ratio. Furthermore, a compact first-order design of three-component 4X zoom
system with two fixed foci is proposed to show the high efficiency and great
potential of our proposed algorithm in searching proper first-order
configuration for complex optical systems.
