Rotational varifocal planar lens
AssigneeSamsung Electronics Co., Ltd.
InventorsJunghyun PARK, Sunghyun NAM
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Abstract
A varifocal lens includes a first phase plate and a second phase plate which are rotatable relative to each other about an optical axis. The first phase plate includes a plurality of first phase conversion elements, the second phase plate includes a plurality of second phase conversion elements, and the plurality of first phase conversion elements and the plurality of second phase conversion elements are arranged so that light transmitted through the first phase plate and the second phase plate is focused on different positions on the optical axis depending on a relative rotational displacement between the first phase plate and the second phase plate.
Claims17
A varifocal lens comprising:
- a first phase plate comprising a plurality of first phase conversion elements, at least some of the plurality of first phase conversion elements having diameters that are different from each other;
- and
- a second phase plate comprising a plurality of second phase conversion elements, at least some of the plurality of first phase conversion elements having diameters that are different from each other,
- wherein the diameters of the plurality of first phase conversion elements according to positions of the plurality of first phase conversion elements on the first phase plate and the diameters of the plurality of second phase conversion elements according to positions of the plurality of second phase conversion elements on the second phase plate are determined so that a phase of light transmitted through each of the first phase plate and the second phase plate is proportional to a square of a radial distance with respect to an optical axis and proportional to an azimuth angle.
Dependencies are inferred from the claim text.