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Proceedings Paper

Telecentric zoom lens
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Paper 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.

Paper Details

Date Published: 14 December 2001
PDF: 10 pages
Proc. SPIE 4487, Zoom Lenses III, (14 December 2001); doi: 10.1117/12.450416
Show Author Affiliations
John Robert Zinter, Optem International (United States)
Mark C. Sanson, Optem International (United States)


Published in SPIE Proceedings Vol. 4487:
Zoom Lenses III
Iain A. Neil; Takanori Yamanashi, Editor(s)

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