Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsKil Soo SHIN, 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, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in ascending numerical order along an optical axis from an object side of the optical imaging system toward an imaging plane of an image sensor, wherein TTL/(2*IMG HT)≤0.67 is satisfied, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane of the image sensor, and IMG HT is one half of a diagonal length of the imaging plane of the image sensor, and 15<v1−v3<45 is satisfied, where v1 is an Abbe number of the first lens, and v3 is an Abbe number of the third lens.
Claims20
An optical imaging system comprising:
- a first lens having a positive refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
- a second lens having a negative refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof;
- a third lens having a refractive power;
- a fourth lens having a refractive power, and a convex object-side surface in a paraxial region thereof;
- a fifth lens having a negative refractive power;
- a sixth lens having a positive refractive power;
- and
- a seventh lens having a negative refractive power,
- wherein the first to seventh lenses are sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system,
- the optical imaging system has a total number of seven lenses, and
- 0<f1/f<2, −3.5<f2/f<0, and 15<v1−v3<45 are satisfied, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f is a focal length of the optical imaging system, v1 is an Abbe number of the first lens, and v3 is an Abbe number of the third lens.
Dependencies are inferred from the claim text.