Imaging lens assembly
Provided is an imaging lens assembly, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side of the imaging lens assembly to an image side of the imaging lens assembly in turn. The first lens is of a positive focal power, an object side surface of the first lens is convex; the second lens is of a negative focal power, an image side surface of the second lens is concave; the third lens is of a focal power; the fourth lens is of a focal power; and the fifth lens is of a negative focal power; and a combined focal power of the third lens and the fourth lens is negative. The imaging lens assembly meets the following formulas: 2.0<f/ImgH<3.0; and 0<f 1 /f<0.5.
1. An imaging lens assembly, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side of the imaging lens assembly to an image side of the imaging lens assembly in turn, wherein
the first lens is of a positive focal power, an object side surface of the first lens is convex;
the second lens is of a negative focal power, an image side surface of the second lens is concave;
the third lens is of a focal power;
the fourth lens is of a focal power; and
the fifth lens is of a negative focal power;
a combined focal power of the third lens and the fourth lens is negative;
the imaging lens assembly meets the following formulas:
2.0 <f /ImgH<3.0; and
0 <f 1 /f< 0.5,
wherein f represents an effective focal length of the imaging lens assembly,
ImgH equals to a half-length of a diagonal of an effective pixel region at an imaging side surface of the imaging lens assembly, and
f 1 represents an effective focal length of the first lens.
2. The imaging lens assembly according to claim 1 , further comprising an aperture stop arranged between the first lens and the second lens.
3. The imaging lens assembly according to claim 1 , wherein the imaging lens assembly meets the following formula:
TTL/ f≤ 1.0,
wherein TTL is a total length of the imaging lens assembly, and
f represents an effective focal length of the imaging lens assembly.
4. The imaging lens assembly according to claim 1 , wherein the imaging lens assembly meets the following formula:
2.0< f 1/CT1<4.0,
wherein f 1 represents an effective focal length of the first lens, and
CT 1 is a central thickness of the first lens.
5. The imaging lens assembly according to claim 1 , wherein the imaging lens assembly meets the following formula:
−3.0≤ f 5/≤ f− 1.0,
wherein f 5 represents an effective focal length of the fifth lens, and
f represents an effective focal length of the imaging lens assembly.
6. The imaging lens assembly according to claim 1 , wherein the imaging lens assembly meets the following formulas:
−1.5< f 3/ f 4<0; and
0< R 6/ R 7<3.0,
wherein f 3 represents an effective focal length of the third lens,
f 4 represents an effective focal length of the fourth lens,
R 6 represents a curvature radius of the image side surface of the third lens, and
R 7 represents a curvature radius of the object side surface of the fourth lens.
7. The imaging lens assembly according to claim 1 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.
8. The imaging lens assembly according to claim 7 , wherein the third lens is of a positive focal power, and an image side surface of the third lens is convex.
9. The imaging lens assembly according to claim 8 , wherein the fourth lens is of a negative focal power, and an object side surface of the fourth lens is concave.
10. The imaging lens assembly according to claim 2 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.
11. The imaging lens assembly according to claim 3 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.
12. The imaging lens assembly according to claim 4 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.
13. The imaging lens assembly according to claim 5 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.
14. The imaging lens assembly according to claim 6 , wherein an image side surface of the first lens is convex, and an object side surface of the second lens is concave.