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US 11,885,942 B2Granted
Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHag Chul Kim, Hyuk Joo Kim, Kyu Min Chae
Life of this patent
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Abstract
An optical imaging system includes a first lens having negative refractive power, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first to seventh lenses are sequentially disposed from an object side toward an image side. The third lens and the seventh lens are formed of plastic, and the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are formed of glass.
Claims18
An optical imaging system comprising:
- a first lens comprising negative refractive power, and comprising a convex object-side surface;
- a second lens comprising negative refractive power;
- a third lens comprising positive refractive power, and comprising a concave object-side surface and a convex image-side surface;
- a fourth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a fifth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a sixth lens comprising negative refractive power, and comprising a concave object-side surface and a concave image-side surface;
- and
- a seventh lens comprising positive refractive power,
- wherein the optical imaging system comprises a total of seven lenses and the first to seventh lenses are sequentially disposed from an object side toward an image side such that the fifth lens is spaced apart from the fourth lens at an optical axis,
- wherein R5 is a radius of curvature of the object-side surface of the third lens, f is an overall focal length of the optical imaging system, and −15.0<R5/f<−5.0, and
- wherein f3 is a focal length of the third lens, and 0.02<f/f3<0.08.
8 more elements
An optical imaging system comprising:
- a first lens comprising negative refractive power, and comprising a convex object-side surface;
- a second lens comprising negative refractive power;
- a third lens comprising positive refractive power, and comprising a concave object-side surface and a convex image-side surface;
- a fourth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a fifth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a sixth lens comprising negative refractive power, and comprising a concave object-side surface and a concave image-side surface;
- and
- a seventh lens comprising positive refractive power,
- wherein the optical imaging system comprises a total of seven lenses and the first to seventh lenses are sequentially disposed from an object side toward an image side such that the fifth lens is spaced apart from the fourth lens at an optical axis,
- wherein R5 is a radius of curvature of the object-side surface of the third lens, f is an overall focal length of the optical imaging system, and −15.0<R5/f<−5.0, and
- wherein n3 is a refractive index of the third lens and n3<1.535.
8 more elements
An optical imaging system comprising:
- a first lens comprising negative refractive power, and comprising a convex object-side surface;
- a second lens comprising negative refractive power;
- a third lens comprising positive refractive power, and comprising a concave object-side surface and a convex image-side surface;
- a fourth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a fifth lens comprising positive refractive power, and comprising a convex object-side surface and a convex image-side surface;
- a sixth lens comprising negative refractive power, and comprising a concave object-side surface and a concave image-side surface;
- and
- a seventh lens comprising positive refractive power,
- wherein the optical imaging system comprises a total of seven lenses and the first to seventh lenses are sequentially disposed from an object side toward an image side such that the fifth lens is spaced apart from the fourth lens at an optical axis,
- wherein R5 is a radius of curvature of the object-side surface of the third lens, f is an overall focal length of the optical imaging system, and −15.0<R5/f<−5.0, and
- wherein R3 is a radius of curvature of an object-side surface of the second lens, R4 is a radius of curvature of an image-side surface of the second lens, and R3/R4>10.
8 more elements
Dependencies are inferred from the claim text.