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US 8,786,966 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.
Claims30
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 negative (−) power;
- a fourth lens being convex toward the image side;
- a fifth lens having negative (−) power;
- and
- an aperture stop disposed in front of the first lens to adjust a light amount,
- wherein the image lens unit satisfies the following conditional expression:
- 0.333
- <
- r
-
-
- 1
- f
- <
- 0.368
- where r1 is a radius of curvature of an object-side surface of the first lens, and f is the overall focal distance of the image lens unit, and
- wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side to the image side.
16 more elements
An image lens unit, comprising:
- a first lens having positive (+) power and comprising a convex surface on an object side;
- a second lens having negative (−) power and comprising a concave surface on an image side;
- a third lens having negative (−) power;
- a fourth lens comprising a concave surface on the object side and a convex surface on the image side;
- a fifth lens having negative (−) power and comprising an image side surface being concave in the center and convex at the periphery;
- and
- an aperture stop disposed in front of the first lens to adjust a light amount,
- wherein the image lens unit satisfies the following conditional expression:
- 0.333
- <
- r
-
-
- 1
- f
- <
- 0.368
- where r1 is a radius of curvature of an object-side surface of the first lens, and f is the overall focal distance of the image lens unit, and
- wherein 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.
16 more elements
An imaging lens unit, comprising:
- a first lens having positive (+) power;
- a second lens having negative (−) power;
- a third lens having negative (−) power;
- a fourth lens being convex in the center toward an image side;
- a fifth lens having negative (−) power;
- and
- an aperture stop disposed in front of the first lens to adjust a light amount,
- wherein the image lens unit satisfies the following conditional expression:
- 0.333
- <
- r
-
-
- 1
- f
- <
- 0.368
- where r1 is a radius of curvature of an object-side surface of the first lens, and f is the overall focal distance of the image lens unit, and
- wherein the first lens, the second lens, the third lens, the fourth lens, and fifth lens are arranged in order from an object side to the image side.
16 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 negative (−) power;
- a fourth lens being convex toward the image side;
- and
- a fifth lens having negative (−) power,
- wherein the image lens unit satisfies the following conditional expression:
- 0.333
- <
- r
-
-
- 1
- f
- <
- 0.368
- 0.010
- <
- d
-
-
- 12
- f
- <
- 0.023
- 0.062
- <
- d
-
-
- 23
- f
- <
- 0.134
- where r1 is a radius of curvature of an object-side surface of the first lens, d12 is a distance from an image-side surface of the first lens to an object-side surface of the second lens, d23 is a distance from an image-side surface of the second lens to an object-side surface of the third lens, and f is the overall focal distance of the image lens unit, and
- wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side to the image side.
33 more elements
Dependencies are inferred from the claim text.