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Proceedings Paper

Power allocation for varifocal lens of two groups
Author(s): Chengliang Wang; Xiangning Li; Liqing He
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Paper Abstract

The inverted telephoto lens consisting of two groups is required when a long back focal length and a wide field of view are needed. Varying the air space between these two groups would change the effective focal length. In this paper, power allocation for this varifocal lens affected by aperture, field of view and amount of variation of air space is analyzed. The solution of power allocation is introduced, from which large aperture, wide field of view, and small volume is benefit. Six equations, i.e. power region equation, aperture equation, field of view equation, back focal length equation, movable region equation, speed equation, are derived to guide power allocation of this kind of optical system.

Paper Details

Date Published: 20 September 2002
PDF: 4 pages
Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471686
Show Author Affiliations
Chengliang Wang, Univ. of Shanghai for Science and Technology (China)
Xiangning Li, Univ. of Shanghai for Science and Technology (China)
Liqing He, Univ. of Shanghai for Science and Technology (China)


Published in SPIE Proceedings Vol. 4927:
Optical Design and Testing
Zhicheng Weng; Jose M. Sasian; Yongtian Wang, Editor(s)

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