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US 11,531,192 B2Granted
Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHag Chul Kim, Yong Joo Jo, Hwan Soo Park
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, the fourth lens, the sixth lens, and the seventh lens are formed of plastic, and the first lens, the second lens, and the fifth lens are formed of glass.
Claims20
An optical imaging system comprising:
- a first lens comprising negative refractive power;
- a second lens comprising refractive power;
- a third lens comprising positive refractive power;
- a fourth lens comprising negative refractive power;
- a fifth lens comprising refractive power;
- a sixth lens comprising positive refractive power;
- and
- a seventh lens comprising negative refractive power,
- wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,
- wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and
- wherein −0.5<f/f4<−0.1 is satisfied, where f4 is a focal length of the fourth lens, and f is an overall focal length of the optical imaging system.
8 more elements
An optical imaging system comprising:
- a first lens comprising negative refractive power;
- a second lens comprising refractive power;
- a third lens comprising positive refractive power;
- a fourth lens comprising negative refractive power;
- a fifth lens comprising refractive power;
- a sixth lens comprising positive refractive power;
- and
- a seventh lens comprising negative refractive power,
- wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,
- wherein −0.5<f/f4<−0.1 is satisfied, where f4 is a focal length of the fourth lens, and f is an overall focal length of the optical imaging system, and
- wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens.
8 more elements
An optical imaging system comprising:
- a first lens comprising negative refractive power;
- a second lens comprising refractive power;
- a third lens comprising positive refractive power;
- a fourth lens comprising negative refractive power;
- a fifth lens comprising refractive power and a convex image-side surface;
- a sixth lens comprising positive refractive power;
- and
- a seventh lens comprising negative refractive power,
- wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,
- wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and
- wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens.
8 more elements
Dependencies are inferred from the claim text.