Lens assembly and electronic apparatus including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsHwanseon Lee, Haneung Kim
Life of this patent
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Abstract
A lens assembly and an electronic apparatus having the lens assembly are disclosed. The disclosed lens assembly includes a plurality of lenses arranged from an object side to an image side, the image side being where an image sensor is located, and includes a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power. During zooming, the second lens group and the third lens group move to the object side, and the third lens group performs focusing. In addition, various other embodiments are possible.
Claims19
A lens assembly comprising a plurality of lenses that are arranged from an object side to an image side, the image side being where an image sensor is located,
- wherein the plurality of lenses includes a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power,
- wherein, during zooming, the second lens group and the third lens group move to the object side, and the third lens group performs focusing, wherein the first lens group comprises two aspherical plastic lenses,
- wherein the lens assembly satisfies inequalities:
- 1<TL/ft<1.1 and
- ft/fw≥2,
- wherein TL denotes a distance from an apex of an object side surface of a first lens to a surface of the image sensor, ft denotes a total focal length at a telephoto angle end, and fw denotes a total focal length at a wide angle end,
- wherein the lens assembly satisfies an inequality:
- −0.7≤β2t/β3t≤−0.28,
- wherein β2t denotes image forming magnification of the second lens group at the telephoto angle end, and β3t denotes image forming magnification of the third lens group at the telephoto angle end.
An electronic apparatus comprising:
- a lens assembly;
- at least one camera configured to acquire information about an object from light incident through the lens assembly;
- and
- an image signal processor configured to process, based on the information, an image of the object,
- wherein the lens assembly comprises a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, the first to third lens groups being arranged from an object side to an image side, the image side being where an image sensor is located,
- wherein, during zooming, the second lens group and the third lens group move to the object side, and the third lens group performs focusing,
- wherein the first lens group comprises two aspherical plastic lenses,
- wherein the lens assembly satisfies inequalities:
- 1<TL/ft<1.1 and
- ft/fw≥2,
- wherein TL denotes a distance from an apex of an object side surface of a first lens to a surface of the image sensor, ft denotes a total focal length at a telephoto angle end, and fw denotes a total focal length at a wide angle end,
- wherein the lens assembly satisfies an inequality:
- −0.7≤β2t/β3t≤−0.28,
- wherein β2t denotes image forming magnification of the second lens group at the telephoto angle end, and β3t denotes image forming magnification of the third lens group at the telephoto angle end.
Dependencies are inferred from the claim text.