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US 11,448,857 B2Granted
Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHag Chul Kim, Hyuk Joo Kim, Kyu Min Chae
Life of this patent
Estimating the term…
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;
- 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 the third lens and the seventh lens are formed of plastic,
- wherein the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are formed of glass, and
- wherein TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, IMGH is a half of a diagonal length of the imaging plane of the image sensor, and TTL/(2*IMGH)<3.05.
9 more elements
An optical imaging system comprising:
- a first lens comprising negative refractive power and having a meniscus shape, of which an object-side surface is convex;
- a second lens comprising negative refractive power and having a meniscus shape, of which an object-side surface is convex;
- 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 the third lens and the seventh lens are formed of plastic,
- wherein the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are formed of glass,
- wherein an image-side surface of the fifth lens and an object-side surface of the sixth lens are cemented to each other, and
- wherein f3 is a focal length of the third lens, f is an overall focal length of the optical imaging system including the first lens to the seventh lens, and 0.02<f/f3<0.08.
10 more elements
Dependencies are inferred from the claim text.