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US 9,851,539 B2Granted
Imaging lens unit
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorHo Sik You
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an imaging lens unit, including: a first lens having a positive (+) power; a second lens having a negative (−) power; a third lens selectively having one of a positive (+) and negative (−) power; a fourth lens having a negative (−) power; and a fifth lens having a negative (−) power, wherein the first lens, the second lens, the third lens, the fourth lens, and fifth lens are arranged in order from an object to be formed as an image, and the fourth lens is concave toward an image side.
Claims25
An image lens unit, comprising:
- a first lens having positive (+) power and being convex toward an object side;
- a second lens having negative (−) power and being concave toward an image side;
- a third lens having positive (+) power and being concave near an axial perimeter toward the object side;
- a fourth lens having negative (−) power and a meniscus shape being concave in the center toward the object side and convex toward the image side;
- and
- a fifth lens having a refractive power and being convex toward the object side and concave toward the image side,
- wherein:
- an Abbe number v2 of the second lens satisfies the following conditional expression:
- 0<v2<30,
- at least one inflection point is formed on an image-side surface of the fifth lens, and
- the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side toward the image side.
8 more elements
An image lens unit, comprising:
- a first lens having positive (+) power and being convex toward an object side;
- a second lens having negative (−) power and being concave toward an image side;
- a third lens having positive (+) power and being concave near an axial perimeter toward the object side and convex toward the image side;
- a fourth lens having negative (−) power and being concave in the center toward the object side and convex toward the image side;
- and
- a fifth lens having a refractive power and comprising:
- an object-side surface being convex in the center and concave at the periphery;
- and
- an image-side surface being concave in the center and convex at the periphery, wherein:
- an Abbe number v2 of the second lens and an Abbe number v4 of the fourth lens satisfy the following conditional expressions:
- 0<v2<30
- 0<v4<30
- the third and fourth lenses have a meniscus shape, and
- the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side toward the image side.
11 more elements
Dependencies are inferred from the claim text.