Optical image capturing lens assembly
An optical image capturing lens assembly includes, 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has negative refractive power. The third lens element has negative refractive power. The fourth lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The fifth lens element with refractive power has a concave image-side surface, wherein the fifth lens element has at least one inflection point formed on at least one surface thereof. Both of the object-side surface and the image-side surface of the fourth and fifth lens elements are aspheric. The optical image capturing lens assembly has a total of five lens elements with refractive power.
1. An optical image capturing lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
a second lens element having negative refractive power;
a third lens element having negative refractive power;
a fourth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, wherein the object-side surface and the image-side surface of the fourth lens element are aspheric; and
a fifth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof;
wherein number of lens elements with refractive power of the optical image capturing lens assembly is limited to five, a focal length of the optical image capturing lens assembly is f, a focal length of the third lens element is f 3 , an axial distance between the first lens element and the second lens element s T 12 , an axial distance between the second lens element and the third lens element is T 23 , a curvature radius of an object-side surface of the second lens element is R 3 , a curvature radius of an image-side surface of the second lens element is R 4 , and the following relationships are satisfied:
−0.60 <f/f 3<0;
0< T 12 /T 23<0.40; and
| R 3 /R 4|<0.85.
2. The optical image capturing lens assembly of claim 1 , wherein the focal length of the optical image capturing lens assembly is f, the focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , and the following relationship is satisfied:
| f/f 3|+| f/f 4|+ f/f 5|<0.9.
3. The optical image capturing lens assembly of claim 2 , wherein the object-side surface of the second lens element is concave in a paraxial region thereof, and the object-side surface of the fifth lens element is convex in a paraxial region thereof.
4. The optical image capturing lens assembly of claim 3 , wherein the third lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof.
5. The optical image capturing lens assembly of claim 2 , wherein the axial distance between the first lens element and the second lens element is T 12 , the axial distance between the second lens element and the third lens element is T 23 , and the following relationship is satisfied;
0< T 12 /T 23<0.25.
6. The optical image capturing lens assembly of claim 2 , wherein the object-side surface of the fourth lens element is concave at a paraxial region and comprises two inflection points between the paraxial region and a peripheral region thereof.
7. The optical image capturing lens assembly of claim 2 , wherein an Abbe number of the second lens element is V 2 , an Abbe number of the third lens element is V 3 , an Abbe number of the fourth lens element is V 4 , and the following relationship is satisfied:
30< V 2 +V 3+ V 4<90.
8. The optical image capturing lens assembly of claim 1 , wherein a distance in parallel with an optical axis from an axial vertex on the object-side surface of the fourth lens element to 70% of a maximum effective diameter position on the object-side surface of the fourth lens element is SAG 41 a, a distance in parallel with the optical axis from the axial vertex on the object-side surface of the fourth n element to the maximum effective diameter position on the object-side surface of the fourth lens element is SAG 41 b, and the following relationship is satisfied:
| SAG 41 a/SAG 41 b|< 0.30.
9. The optical image capturing lens assembly of claim 8 , wherein a focal length of the first lens element is f 1 , a focal length of the second lens element is f 2 , and the following relationship is satisfied:
−0.60< f 1/ f 2<−0.15.
10. The optical image capturing lens assembly of claim 8 , wherein an axial distance between the object-side surface of the first lens element and an image plane is TL, and the following relationship is satisfied:
2.0 mm<TL<4.8 mm.
11. The optical image capturing lens assembly of claim 2 , wherein the focal length of the optical image capturing lens assembly is f, the focal length of the third lens element is f 3 , the focal length of the fourth lens element is f 4 , the focal length of the fifth lens element is f 5 , and the following relationship is satisfied:
| f/f 3|+| f/f 4|+| f/f 5|<0.5.
12. The optical image capturing lens assembly of claim 11 , wherein the fifth lens element has negative refractive power.
13. The optical image capturing lens assembly of claim 11 wherein the third lens element has an object-side surface being concave in a paraxial region thereof, the curvature radius of the object-side surface of the second lens element is R 3 , the curvature radius of the image-side surface of the second lens element is R 4 , and the following relationship is satisfied:
51 R 3/ R 4|<0.55.
14. An optical image capturing lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
a second lens element having negative refractive power;
a third lens element having refractive power
a fourth lens element having negative refractive power, wherein an object-side surface and an image-side surface of the fourth lens element are aspheric; and
a fifth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof;
wherein a number of lens elements with refractive power of the optical image capturing lens assembly is limited to five, a focal length of the optical image capturing lens assembly is f, a focal length of the third lens element is f 3 , an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , an Abbe number of the second lens element is V 2 , an Abbe number of the third lens element is V 3 , an Abbe number of the fourth lens element is V 4 , and the following relationships are satisfied:
−0.60< f/f 3<0.20;
0< T 12/ T 23<0.75; and
30< V 2+ V 3+ V 4<90.
15. The optical image capturing lens assembly of claim 14 , wherein the object-side surface of the fifth lens element is convex in a paraxial region thereof.
16. The optical image capturing lens assembly of claim 15 , wherein the object-side surface of the fourth lens element is concave in a paraxial region thereof and the image-side surface of the fourth lens element is convex in a paraxial region thereof.
17. The optical image capturing lens assembly of claim 16 , wherein a distance in parallel with an optical axis from an axial vertex on the image-side surface of the fourth lens element to a maximum effective diameter position on the image-side surface of the fourth lens element is SAG 42 , a central thickness of the fourth lens element is CT 4 , and the following relationship is satisfied:
−1.2< SAG 42/ CT 4<−0.5.
18. The optical image capturing lens assembly of claim 14 , wherein the Abbe number of the second lens element is V 2 , the Abbe number of the third lens element is V 3 , the Abbe number of the fourth lens element is V 4 , and the following relationship is satisfied:
50< V 2+ V 3+ V 4<80.
19. The optical image capturing lens assembly of claim 14 , wherein the focal length of the optical image capturing lens assembly is f, the focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , and the following relationship is satisfied:
| f/f 3|+| f/f 4|+| f/f 5|<0.5.
20. The optical image capturing lens assembly of claim 14 , wherein a distance in parallel with an optical axis from an axial vertex on the object-side surface of the fourth lens element to 70% of a maximum effective diameter position on the object-side surface of the fourth lens element is SAG 41 a, a distance in parallel with the optical axis from the axial vertex on the object-side surface of the fourth lens element to the maximum effective diameter position on the object-side surface of the fourth lens element is SAG 41 b, and the following relationship is satisfied:
| SAG 41 a/SAG 41 b|< 0.30.
21. The optical image capturing lens assembly of claim 14 , wherein a maximum image height of the optical image capturing lens assembly is ImgH, an axial distance between the object-side surface of the first lens element and an image plane is TL, and the following relationship is satisfied:
TL/ImgH< 1.60.
22. The optical image capturing lens assembly of claim 14 ,. wherein the object-side surface of the fourth lens element is concave at a paraxial region and comprises two inflection points between the paraxial region and a peripheral region thereof.
23. The optical image capturing lens assembly of claim 14 , wherein an axial distance between the object-side surface of the first lens element and an image plane is TL, and the following relationship is satisfied:
2.0 mm<TL<4.8 mm.