Proceedings PaperZoom system design of 14X using optimized lens modules
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By the lens module theory, an initial design containing the first and third order properties of the four-group video camera zoom system with zoom ratio of 14X, and its real lens design are presented. The optimum initial design with focal length range of 4.1139 to 55.6148mm is derived by assigning appropriate first order quantities and third order aberrations to each module along with the specific constraints required for optimization. In order to obtain the real lens system equivalent to each lens module, we have optimized each real lens group with the constraints composed of the first order quantities and all third order aberrations of module. In order words, a real lens for each group has been designed to match the first order quantities and third order aberrations at a given conjugates. Finally we have combined to establish an actual zoom system. The combination of the separately designed groups results in a system which satisfies the properties of the zoom system consisting of original lens modules.