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US 2026/0029622 A1Published application
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;
- a second lens comprising negative refractive power;
- a third lens comprising positive refractive power;
- a fourth lens comprising positive refractive power;
- a fifth lens comprising positive refractive power;
- a sixth lens comprising negative refractive power;
- and
- a seventh lens comprising positive refractive power,
- wherein the optical imaging system has a total of seven lenses, and the first to seventh lenses are sequentially disposed from an object side toward an image side,
- wherein the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are formed of glass,
- wherein the third lens and the seventh lens are formed of plastic, wherein the third lens and the seventh lens shrink or expand according to a change in temperature of a surrounding environment, so that a focus position of the optical imaging system is not changed in a case in which the temperature is changed, and
- wherein the optical imaging system satisfies at least one of n3<1.535 and n7<1.535, where n3 is a refractive index of the third lens and n7 is a refractive index of the seventh lens.
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;
- a fourth lens comprising positive refractive power;
- a fifth lens comprising positive refractive power;
- a sixth lens comprising negative refractive power;
- and
- a seventh lens comprising positive refractive power,
- wherein the optical imaging system has a total of seven lenses, and the first to seventh lenses are sequentially disposed from an object side toward an image side,
- wherein the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are formed of glass,
- wherein the third lens and the seventh lens are formed of plastic, wherein the third lens and the seventh lens shrink or expand according to a change in temperature of a surrounding environment, so that a focus position of the optical imaging system is not changed in a case in which the temperature is changed,
- 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 the optical imaging system satisfies at least one of n3<1.535 and n7<1.535, where n3 is a refractive index of the third lens and n7 is a refractive index of the seventh lens.
10 more elements
Dependencies are inferred from the claim text.