Pupil aberration in zoom lenses

Matthew T. Chang; Robert R. Shannon

doi:10.1117/12.284238

25 September 1997 Pupil aberration in zoom lenses

Matthew T. Chang, Robert R. Shannon

Proceedings Volume 3129, Zoom Lenses II; (1997) https://doi.org/10.1117/12.284238
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

In any zoom lens, individual zoom groups experience both image and pupil magnification changes during zooming. Deliberate aberration can be introduced into zoom groups to produce an overall compensatory effect over the zoom range. When using a modular design approach, in which lens groups are designed independently, one has to take into account pupil matching among zoom groups. This is analogous to the design of relay optical systems. In a zoom lens, pupil matching becomes a dynamic problem. Perfect pupil matching among zoom groups in theory cannot be maintained for a continuum of zoom positions. With the deliberate introduction of pupil aberration on the group level, compensatory effects can be obtained and a more desirable pupil match can be achieved, resulting in better stability of system image performance over the zoom range. This paper presents a systematic explanation on how pupil spherical aberration can be used in controlling residual system distortion in zoom lenses. The study involves "black box" lens modules design with the help of computer ray trace program.

Citation Download Citation

Matthew T. Chang and Robert R. Shannon "Pupil aberration in zoom lenses", Proc. SPIE 3129, Zoom Lenses II, (25 September 1997); https://doi.org/10.1117/12.284238

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