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Title: Optimization design of two-group night vision zoom lenses
Authors: Tien, Chuen-Lin
Huang, Chun-Hao
Lin, Tsai-Wei
Sun, Wen-Shing
Lin, Chern-Sheng
Keywords: Optical lens design;Zoom lenses;Optimization;Night vision
Issue Date: Dec-2011
Publisher: NISCAIR-CSIR, India
Abstract: An optimization design for mechanically compensated two-group zoom lenses for night vision applications is presented. Two optimization algorithms combined with a merit function and the damped least-squares method are proposed and used for optimization of each lens-group. This optical lens design should be good enough to meet the performance requirements for an image intensifier tube. The proposed zoom system consists of a negative and a positive lens-group structure with one aspheric lens and seven glass lenses. The design result of zoom lenses includes spectral range of 600-900 nm, focal length range of 12-35 mm, zoom ratio of 2.9, the maximum full-field angle of 74° and f-number of 1.9-2.3. The total length of the zoom system is less than 200 mm. The design results show that the best performance can be obtained by our proposed approach.
Page(s): 809-815
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(12) [December 2011]

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