Telecentric zoom lens

John Robert Zinter; Mark C. Sanson

doi:10.1117/12.450416

14 December 2001 Telecentric zoom lens

John Robert Zinter, Mark C. Sanson

Proceedings Volume 4487, Zoom Lenses III; (2001) https://doi.org/10.1117/12.450416
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The metrology community traditionally used fixed telecentric lenses to do optical measurement. The need to investigate varying fields of view led to the use of several fixed magnification lenses; this approach eventually yielded to zoom lenses. The majority of zoom lenses are designed to hold one set of conjugates constant, usually the object and the image. Such zoom lenses typically have the entrance pupil internal to the zoom groups; thus varying in position during zooming. By placing a stop external to the zoom groups, a constant entrance pupil position can be achieved. This idea can be extended to a telecentric stop position, and hence a telecentric zoom lens.

Citation Download Citation

John Robert Zinter and Mark C. Sanson "Telecentric zoom lens", Proc. SPIE 4487, Zoom Lenses III, (14 December 2001); https://doi.org/10.1117/12.450416

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