Optical lens
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United States of America Patent
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Jun 2, 2020
Grant Date -
Jun 14, 2018
app pub date -
Aug 7, 2017
filing date -
Dec 14, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An optical lens includes a first lens group with negative refractive power, a second lens group with positive refractive power, and an aperture stop disposed between the first lens group and the second lens group. A total number of lenses in the first lens group is less than three, and a total number of lenses in the second lens group is less than five. The second lens group includes a first lens, a second lens and a third lens arranged in order in a direction away from the aperture stop. Each of the first lens and the second lens is an aspheric lens, and one of the first lens and the second lens has a diffractive optical surface.
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