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Method of determining Gaussian parameters for zoom systems with multiple moving lens groups

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Abstract

Along with the rapid development of design tools and manufacturing technologies, zoom systems are finding more and more applications because of their convenience in use. Different methods may be used to achieve the variation of the focal length of a zoom system, including optical compensation and mechanical compensation [1-3]. Conventionally, a mechanically compensated zoom system is composed of a fixed front lens group, a zoom lens group that typically moves linearly, one or two compensating lens group(s) and a fixed back lens group. The movement(s) of the compensating group(s) is (are) obtained by solving equations for Gaussian parameters, so that the image plane of the system is held stable through the zoom operation. In recent years, however, design forms with multiple moving lens groups are more and more often adopted in people’s constant pursuit for zoom systems with high image quality, large zoom ratio and compact size [4].

© 2002 Optical Society of America

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