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US 2025/0147288 A1Published application
Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsIl Yong PARK, In Do SEO, Yong Joo JO
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 having negative refractive power, a fifth lens having positive refractive power, a sixth lens having a convex image-side surface, and a seventh lens, disposed sequentially from an object side. The optical imaging system satisfies −5.0<f2/f<−2.0, where f is a focal length of the optical imaging system and f2 is a focal length of the second lens. An F No. of the optical imaging system is less than 1.7.
Claims12
An optical imaging system comprising:
- a first lens comprising a refractive power;
- a second lens comprising a refractive power;
- a third lens comprising a convex object-side surface in a paraxial region thereof;
- a fourth lens comprising a refractive power;
- a fifth lens comprising a concave object-side surface in a paraxial region thereof;
- a sixth lens comprising a refractive power;
- and
- a seventh lens comprising a refractive power,
- wherein the first to seventh lenses are sequentially disposed in ascending numerical order from an object side toward an imaging plane,
- wherein a radius of curvature of an object-side surface of the seventh lens is greater than a radius of curvature of an image-side surface of the sixth lens, and
- wherein −4.0<f1/f2, where f1 is a focal length of the first lens and f2 is a focal length of the second lens.
8 more elements
An optical imaging system comprising:
- a first lens comprising a refractive power;
- a second lens comprising a refractive power;
- a third lens comprising a convex object-side surface in a paraxial region thereof;
- a fourth lens comprising a convex object-side surface in a paraxial region thereof;
- a fifth lens comprising a refractive power;
- a sixth lens comprising a refractive power;
- and
- a seventh lens comprising a refractive power,
- wherein the first to seventh lenses are sequentially disposed in ascending numerical order from an object side toward an imaging plane,
- wherein a radius of curvature of an object-side surface of the seventh lens is greater than a radius of curvature of an image-side surface of the sixth lens, and
- wherein −4.0<f1/f2, where f1 is a focal length of the first lens and f2 is a focal length of the second lens.
8 more elements
Dependencies are inferred from the claim text.