14 December 2001 Zoom lens without focus-breathing phenomena
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Abstract
Assuming that exit pupil position is fixed, it is presented a zoom lens having a focusing mechanism which does not give rise to any changes in the angular field of view. A frontal part set in front of the zooming part consists of two movable components for focusing. The paraxial condition in which no focus breathing phenomena exist is, in general, derived. Explicit expressions of component-displacement are obtained together with the relation to one-movable component focusing method. According to the analysis, a zoom lens is designed to show the usefulness of the analysis.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kazuo Tanaka, "Zoom lens without focus-breathing phenomena", Proc. SPIE 4487, Zoom Lenses III, (14 December 2001); doi: 10.1117/12.450421; https://doi.org/10.1117/12.450421
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