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US 11,906,707 B2Granted
Imaging lens system having seven lenses of +−+−−+− or +−+−++− refractive powers
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsKil Soo Shin, Yong Joo Jo
Life of this patent
Estimating the term…
Abstract
An imaging lens 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 at intervals from an object side of the imaging lens system. The imaging lens system satisfies 1.5<Nd5<1.6, 30<V5<50, and TTL/2IH<0.730, where Nd5 is a refractive index of the fifth lens, V5 is an Abbe number of the fifth lens, TTL is a distance from an object side surface of the first lens to an imaging plane, and 21H is a diagonal length of the imaging plane.
Claims10
An imaging lens system comprising:
- a first lens comprising a convex object-side surface;
- a second lens comprising a convex object-side surface;
- a third lens comprising positive refractive power and a convex image-side surface in a paraxial region;
- the third lens has a convex object-side surface;
- a fourth lens comprising a concave image-side surface;
- a fifth lens comprising negative refractive power and a convex object-side surface;
- a sixth lens comprising a convex object-side surface and a concave image-side surface in a paraxial region;
- and
- a seventh lens comprising a concave object-side surface,
- wherein the first to seventh lenses are sequentially disposed from an object side of the imaging lens system, and
- wherein an absolute value of a radius of curvature of an image-side surface of the first lens is greater than an absolute value of a radius of curvature of the object-side surface of the fifth lens.
8 more elements
Dependencies are inferred from the claim text.