Image capturing lens assembly, imaging apparatus and electronic device
An image capturing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The fifth lens element with positive refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the image-side surface thereof includes at least one convex shape in an off-axis region thereof.
1. An image capturing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element;
wherein the first lens element has positive refractive power; the seventh lens element has negative refractive power, an object-side surface of the seventh lens element is aspheric, and the object-side surface of the seventh lens element comprises at least one inflection point;
wherein an axial distance between an object-side surface of the first lens element and an image surface is TL, an entrance pupil diameter of the image capturing lens assembly is EPD, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the sixth lens element and the seventh lens element is T67, a total number of lens elements having Abbe numbers less than 20 is V20, and the following conditions are satisfied:
1
.
0
<
TL
/
EPD
≤
2
.40
;
1.0
<
T
67
/
T
12
;
1.0
<
T
67
/
T
23
;
1.0
<
T
67
/
T
34
;
1.0
<
T
67
/
T
45
;
1.0
<
T
67
/
T
56
;
and
2
≤
V
20.
2. The image capturing lens assembly of claim 1 , wherein the first lens element has the object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; the seventh lens element has an image-side surface comprising at least one convex surface in an off-axis region thereof.
3. The image capturing lens assembly of claim 1 , wherein the second lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.
4. The image capturing lens assembly of claim 1 , wherein the fourth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.
5. The image capturing lens assembly of claim 1 , wherein the sixth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the object-side surface and the image-side surface of the sixth lens element are aspheric.
6. The image capturing lens assembly of claim 1 , wherein a total number of lens elements having Abbe numbers less than 40 is V40, and the following condition is satisfied:
3
≤
V
40.
7. The image capturing lens assembly of claim 1 , wherein an f-number of the image capturing lens assembly is Fno, and the following condition is satisfied:
1
.0
<
Fno
≤
1.7
0
.
8. The image capturing lens assembly of claim 1 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, a maximum image height of the image capturing lens assembly is ImgH, and the following condition is satisfied:
0
.
8
0
<
TL
/
ImgH
<
1.70
.
9. The image capturing lens assembly of claim 1 , wherein an incident angle of a chief ray at a maximum image height on the image surface of the image capturing lens assembly is CRA1.0Y, and the following condition is satisfied:
32.0
degrees
≤
CRA
1.0
Y
.
10. The image capturing lens assembly of claim 9 , wherein the incident angle of the chief ray at the maximum image height on the image surface of the image capturing lens assembly is CRA1.0Y, and the following condition is satisfied:
37.0
degrees
≤
CRA
1.0
Y
.
11. The image capturing lens assembly of claim 1 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the entrance pupil diameter of the image capturing lens assembly is EPD, and the following condition is satisfied:
1
.
2
0
<
TL
/
EPD
≤
2
.
1
0
.
12. The image capturing lens assembly of claim 1 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the entrance pupil diameter of the image capturing lens assembly is EPD, a maximum image height of the image capturing lens assembly is ImgH, and the following condition is satisfied:
2
.
0
<
(
TL
2
)
/
(
EPD
×
ImgH
)
<
3
.
2
0
.
13. The image capturing lens assembly of claim 12 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the entrance pupil diameter of the image capturing lens assembly is EPD, the maximum image height of the image capturing lens assembly is ImgH, and the following condition is satisfied:
2
.
0
<
(
TL
2
)
/
(
EPD
×
ImgH
)
≤
3
.
0
.
14. The image capturing lens assembly of claim 1 , further comprising:
an aperture stop disposed on an object side of the first lens element.
15. The image capturing lens assembly of claim 1 , wherein an absolute value of a curvature radius of an object-side surface of the fifth lens element is greater than an absolute value of a curvature radius of an image-side surface of the fifth lens element.
16. The image capturing lens assembly of claim 1 , wherein the axial distance between the fourth lens element and the fifth lens element is greater than the axial distance between the fifth lens element and the sixth lens element.
17. The image capturing lens assembly of claim 1 , wherein each of at least six of the lens elements has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.
18. An imaging apparatus, comprising:
the image capturing lens assembly of claim 1 ; and
an image sensor, wherein the image sensor is disposed on the image surface of the image capturing lens assembly.
19. An electronic device, comprising:
the imaging apparatus of claim 18 .
20. An image capturing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element;
wherein the first lens element has positive refractive power; the seventh lens element has negative refractive power, an object-side surface of the seventh lens element is aspheric, and the object-side surface of the seventh lens element comprises at least one inflection point;
wherein at least one of the lens elements has an Abbe number less than 20;
wherein an axial distance between an object-side surface of the first lens element and an image surface is TL, an entrance pupil diameter of the image capturing lens assembly is EPD, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the sixth lens element and the seventh lens element is T67, and the following conditions are satisfied:
1
.
0
<
TL
/
EPD
≤
2
.40
;
1.0
<
T
67
/
T
12
;
1.0
<
T
67
/
T
23
;
1.0
<
T
67
/
T
34
;
1.0
<
T
67
/
T
45
;
and
1.0
<
T
67
/
T
56.
21. The image capturing lens assembly of claim 20 , wherein the third lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.
22. The image capturing lens assembly of claim 20 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, a maximum image height of the image capturing lens assembly is ImgH, and the following condition is satisfied:
0
.
8
0
<
TL
/
ImgH
≤
1.5
7
.
23. The image capturing lens assembly of claim 20 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the entrance pupil diameter of the image capturing lens assembly is EPD, a maximum image height of the image capturing lens assembly is ImgH, and the following condition is satisfied:
2
.
0
<
(
TL
2
)
/
(
EPD
×
ImgH
)
≤
2
.
8
3
.
24. The image capturing lens assembly of claim 20 , wherein an incident angle of a chief ray at a maximum image height on the image surface of the image capturing lens assembly is CRA1.0Y, and the following condition is satisfied:
35.5
degrees
≤
CRA
1.0
Y
.
25. The image capturing lens assembly of claim 20 , wherein a curvature radius of the object-side surface of the seventh lens element and a curvature radius of an image-side surface of the seventh lens element have the same sign.