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Proceedings Paper

Optimal power distribution for minimizing pupil walk in a 7.5X afocal zoom lens
Author(s): Wanyue Song; Yang Zhao; Rebecca Berman; S. Yvonne Bodell; Eryn Fennig; Yunhui Ni; Jonathan C. Papa; Tianyi Yang; Anthony J. Yee; Duncan T. Moore; Julie L. Bentley
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Paper Abstract

An extensive design study was conducted to find the best optimal power distribution and stop location for a 7.5x afocal zoom lens that controls the pupil walk and pupil location through zoom. This afocal zoom lens is one of the three components in a VIS-SWIR high-resolution microscope for inspection of photonic chips. The microscope consists of an afocal zoom, a nine-element objective and a tube lens and has diffraction limited performance with zero vignetting. In this case, the required change in object (sample) size and resolution is achieved by the magnification change of the afocal component. This creates strict requirements for both the entrance and exit pupil locations of the afocal zoom to couple the two sides successfully. The first phase of the design study looked at conventional four group zoom lenses with positive groups in the front and back and the stop at a fixed location outside the lens but resulted in significant pupil walk. The second phase of the design study focused on several promising unconventional four-group power distribution designs with moving stops that minimized pupil walk and had an acceptable pupil location (as determined by the objective and tube lens).

Paper Details

Date Published: 27 November 2017
PDF: 7 pages
Proc. SPIE 10590, International Optical Design Conference 2017, 105901B (27 November 2017); doi: 10.1117/12.2292268
Show Author Affiliations
Wanyue Song, The Institute of Optics, Univ. of Rochester (United States)
Yang Zhao, The Institute of Optics, Univ. of Rochester (United States)
Rebecca Berman, The Institute of Optics, Univ. of Rochester (United States)
S. Yvonne Bodell, The Institute of Optics, Univ. of Rochester (United States)
Eryn Fennig, The Institute of Optics, Univ. of Rochester (United States)
Yunhui Ni, The Institute of Optics, Univ. of Rochester (United States)
Jonathan C. Papa, The Institute of Optics, Univ. of Rochester (United States)
Tianyi Yang, The Institute of Optics, Univ. of Rochester (United States)
Anthony J. Yee, The Institute of Optics, Univ. of Rochester (United States)
Duncan T. Moore, The Institute of Optics, Univ. of Rochester (United States)
Julie L. Bentley, The Institute of Optics, Univ. of Rochester (United States)


Published in SPIE Proceedings Vol. 10590:
International Optical Design Conference 2017
Peter P. Clark; Julius A. Muschaweck; Richard N. Pfisterer; John R. Rogers, Editor(s)

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