TELEPHOTO LENS SYSTEM
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United States of America Patent
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Issued Date -
Jun 30, 2016
app pub date -
Apr 10, 2015
filing date -
Dec 30, 2014
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Abstract
A telephoto lens system including a lens disposed on an optical axis from an object. A front part of the lens includes a reflecting area in a central portion and a transmitting area in a circumferential portion. A rear part of the lens includes a concave transmitting area in central portion and a reflecting area in a circumferential portion. The lens is formed of a single material. A single lens has a plurality of reflecting areas and a plurality of transmitting areas in order to reduce the length of the lens and increase a focal length, thereby reducing the length of the entire telephoto lens system. The angle of light with respect to the optical axis is controlled to improve imaging, thereby improving the performance of the optical system. A small but high-definition telephoto lens system is provided.
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