Compact internal field of view switch and pupil relay
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United States of America Patent
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Sep 1, 2015
Grant Date -
Sep 11, 2014
app pub date -
Mar 6, 2013
filing date -
Mar 6, 2013
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Abstract
An optical system incorporating a compact internal field of view switch configured to switch the field of view of the optical system between a narrow field of view and a wide field of view while maintaining a constant exit aperture size. In one example the optical system includes an active imaging sub-system optically coupled to the exit aperture, and the field of view switch is positioned between the exit aperture and the active imaging sub-system. In one example the field of view switch is configured as a pupil relay having non-unity magnification.
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