Share Email Print
cover

Optical Engineering

Expert system for generating initial layouts of zoom systems with multiple moving lens groups
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

An expert system is developed for the automatic generation of initial layouts for the design of zoom systems with multiple moving lens groups. The Gaussian parameters of the zoom system are optimized using the damped-least-squares method to achieve smooth zoom cam curves, with the f-number of each lens group in the zoom system constrained to a rational value. Then each lens group is selected automatically from a database according to its range of f-number, field of view, and magnification ratio as it is used in the zoom system. The lens group database is established from the results of analyzing thousands of zoom lens patents. Design examples are given, which show that the scheme is a practical approach to generate starting points for zoom lens design.

Paper Details

Date Published: 1 January 2005
PDF: 8 pages
Opt. Eng. 44(1) 013001 doi: 10.1117/1.1827609
Published in: Optical Engineering Volume 44, Issue 1
Show Author Affiliations
Xuemin Cheng, Motic China Group Co. Ltd. (China)
Yongtian Wang, Beijing Institute of Technology (China)
Qun Hao, Beijing Institute of Technology (China)
José M. Sasián, The Univ. of Arizona (United States)


© SPIE. Terms of Use
Back to Top