Proceedings Article | 3 September 2015
Anthony Vella, Heng Li, Yang Zhao, Isaac Trumper, Gustavo Gandara-Montano, Di Xu, Daniel Nikolov, Changchen Chen, Nicolas Brown, Andres Guevara-Torres, Hae Won Jung, Jacob Reimers, Julie Bentley
Proc. SPIE. 9580, Zoom Lenses V
KEYWORDS: Diffraction, Monochromatic aberrations, Visible radiation, Imaging systems, Cameras, Adaptive optics, Distortion, Lens design, Surveillance, Zoom lenses
*avella@ur.rochester.edu Design study for a 16x zoom lens system for visible surveillance camera Anthony Vella*, Heng Li, Yang Zhao, Isaac Trumper, Gustavo A. Gandara-Montano, Di Xu, Daniel K. Nikolov, Changchen Chen, Nicolas S. Brown, Andres Guevara-Torres, Hae Won Jung, Jacob Reimers, Julie Bentley The Institute of Optics, University of Rochester, Wilmot Building, 275 Hutchison Rd, Rochester, NY, USA 14627-0186 ABSTRACT High zoom ratio zoom lenses have extensive applications in broadcasting, cinema, and surveillance. Here, we present a design study on a 16x zoom lens with 4 groups (including two internal moving groups), designed for, but not limited to, a visible spectrum surveillance camera. Fifteen different solutions were discovered with nearly diffraction limited performance, using PNPX or PNNP design forms with the stop located in either the third or fourth group. Some interesting patterns and trends in the summarized results include the following: (a) in designs with such a large zoom ratio, the potential of locating the aperture stop in the front half of the system is limited, with ray height variations through zoom necessitating a very large lens diameter; (b) in many cases, the lens zoom motion has significant freedom to vary due to near zero total power in the middle two groups; and (c) we discuss the trade-offs between zoom configuration, stop location, packaging factors, and zoom group aberration sensitivity.
