Imaging lens system including eight lenses of +−−++−+−, +−−+−−+− or +−−−+−+− refractive powers
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsPhil Ho Jung, Yong Joo Jo, Hyo Jin Hwang
Life of this patent
Estimating the term…
Abstract
An imaging lens system includes a first lens, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having a concave object-side surface in a paraxial region, disposed in order from an object side in a direction of an imaging plane. The imaging lens system satisfies TTL/IMGHT<1.5, where TTL is a distance from an object-side surface of the first lens to the imaging plane and IMGHT is one-half of a diagonal length of the imaging plane.
Claims14
An imaging lens system, comprising:
- a first lens having a refractive power;
- a second lens having a refractive power;
- a third lens having a refractive power;
- a fourth lens having a refractive power;
- a fifth lens having a convex object-side surface in a paraxial region;
- a sixth lens having a refractive power;
- a seventh lens having a refractive power and a concave image-side surface in a paraxial region;
- and
- an eighth lens having a refractive power,
- wherein the first to eighth lenses are sequentially disposed from an object side toward an imaging plane,
- wherein TTL/IMGHT<1.5, where TTL is a distance from an object-side surface of the first lens to the imaging plane and IMGHT is one-half of a diagonal length of the imaging plane, and
- wherein 1.0<f/f7<1.3, where f is a focal length of the imaging lens system and f7 is a focal length of the seventh lens.
An imaging lens system, comprising:
- a first lens having a refractive power;
- a second lens having a refractive power;
- a third lens having a refractive power;
- a fourth lens having a concave image-side surface;
- a fifth lens having a refractive power and a convex object-side surface in a paraxial region;
- a sixth lens having a refractive power;
- a seventh lens having a refractive power and a concave image-side surface in a paraxial region;
- and
- an eighth lens having a refractive power,
- wherein the first to eighth lenses are sequentially disposed from an object side toward an imaging plane,
- wherein TTL/IMGHT<1.5, where TTL is a distance from an object-side surface of the first lens to the imaging plane and IMGHT is one-half of a diagonal length of the imaging plane, and
- wherein 1.0<f/f7<1.3, where f is a focal length of the imaging lens system and f7 is a focal length of the seventh lens.
Dependencies are inferred from the claim text.