Imaging lens assembly
An imaging lens assembly is disclosed in the present disclosure. The imaging lens assembly includes, in order from an object side to an image side, a stop; a first lens having a positive refractive power, a convex object-side surface and a convex image-side surface; a second lens having a negative refractive power and a convex and meniscus shaped image-side surface; a third lens having a negative refractive power, an image-side surface being concave at a paraxial region and being convex and meniscus shaped at a peripheral region, and an object side-surface being concave at the paraxial region; the image-side surface of the third lens having an inflection point. At least one of the surfaces of three lenses is aspheric, f is a focal length of the imaging lens assembly; f1 is a focal length of the first lens and the imaging lens assembly satisfying following condition: 0 < f 1 f < 1.0 .
1. An imaging lens assembly, in order from an object side to an image side, substantially consisting of:
a stop;
a first lens having a positive refractive power, a convex object-side surface and a convex image-side surface;
a second lens having a negative refractive power and a convex and meniscus shaped image-side surface;
a third lens having a negative refractive power, an image-side surface being concave at a paraxial region and being convex and meniscus shaped at a peripheral region, and an object side-surface being concave at the paraxial region; the image-side surface of the third lens having an inflection point; the object-side surface of the third lens has no inflection point;
at least one of the surfaces of three lenses being aspheric, and the imaging lens assembly satisfying following condition:
0
<
f
1
f
<
1.0
wherein:
f is a focal length of the imaging lens assembly;
f1 is a focal length of the first lens.
2. The imaging lens assembly of claim 1 further satisfies the following condition:
0.75
<
TTL
2
y
<
1.0
wherein:
TTL is an axial distance between the object-side surface of the first lens and the image plane;
y is a maximum image height of the imaging lens assembly.
3. The imaging lens assembly of claim 2 , wherein, the image-side surfaces and the object-side surfaces of the first, second and third lenses are aspheric.
4. The imaging lens assembly of claim 3 further satisfy the following condition:
-
1.2
<
R
2
R
3
<
0
wherein:
R2 is a curvature radius of the object-side surface of the first lens;
R3 is a curvature radius of the image-side surface of the first lens.
5. The imaging lens assembly of claim 1 , wherein, an Abbe number of the second lens ranges from 20 to 30; and an Abbe number of the first lens ranges from 50 to 60.
6. The imaging lens assembly of claim 1 further satisfies the following condition:
0.5
<
f
1
f
<
0.7
wherein:
f is a focal length of the imaging lens assembly;
f1 is a focal length of the first lens.