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US 2021/0063702 A1Published application
Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHag Chul KIM, Yong Joo JO, Hyo Jin HWANG
Life of this patent
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Abstract
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed sequentially from an object side. The optical imaging system satisfies −2.0<L3R2/f<−0.5 and 3.0<f/IMG_HT<4.0, where L3R2 is a radius of curvature of an image-side surface of the third lens, f is a focal length of the optical imaging system, and IMG_HT is half a diagonal length of an imaging plane.
Claims22
An optical imaging system comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed sequentially from an object side,
- wherein
- −2.0<L3R2/f<−0.5, and
- 3.0<f/IMG_HT<4.0,
- where L3R2 is a radius of curvature of an image-side surface of the third lens, f is a focal length of the optical imaging system, and IMG_HT is half a diagonal length of an imaging plane.
2 more elements
An optical imaging system comprising:
- a first lens having a concave image-side surface;
- a second lens having negative refractive power;
- a third lens having a convex object-side surface and a convex image-side surface;
- a fourth lens having a concave image-side surface;
- a fifth lens having positive refractive power;
- a sixth lens having positive refractive power and a concave object-side surface;
- and
- a seventh lens having a concave object-side surface,
- wherein the first to seventh lenses are sequentially disposed from an object side.
6 more elements
An optical imaging system comprising:
- a first lens group including two or more lenses having refractive powers of different signs and disposed such that a distance to an imaging plane is constant;
- a second lens group including three or more lenses, each lens having refractive power of a sign opposite to a sign of an adjacent lens, and configured to move along an optical axis;
- and
- a third lens group including two or more lenses having refractive powers of different signs and configured to move along the optical axis.
1 more element
Dependencies are inferred from the claim text.