2 February 2004 Non-mechanical zoom system
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In order to optically vary the magnification of an imaging system, mechanical zoom lenses, such as those found on 35mm cameras, require multiple optical elements and use cams or gears to adjust the spacing between individual or groups of lenses. By incorporating active elements in the optical design, we can eliminate the need to change lens separations and create an imaging system with variable optical magnification that has no macroscopic moving parts.
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Ty Martinez, David V. Wick, Don M. Payne, Jeffrey T. Baker, Sergio R. Restaino, "Non-mechanical zoom system", Proc. SPIE 5234, Sensors, Systems, and Next-Generation Satellites VII, (2 February 2004); doi: 10.1117/12.510373; https://doi.org/10.1117/12.510373

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