Image capturing lens assembly
An 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 refractive power. The fourth lens element has refractive power, wherein both of an object-side surface and an image-side surface thereof are aspheric. The fifth lens element with positive refractive power has a concave object-side surface and a convex image-side surface, wherein both of the object-side surface and the image-side surface thereof are aspheric. Each of the first through fifth lens elements with refractive power is single and non-cemented. The image capturing lens assembly has a total of five lens elements with refractive power.
1. An image capturing lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface;
second lens element having negative refractive power;
a third lens element having refractive power;
a fourth lens element having refractive power, wherein both of an object-side surface and an image-side surface of the fourth lens element are aspheric; and
a fifth lens element with positive refractive power having a concave object-side surface and a convex image-side surface, wherein both of the object-side surface and the image-side surface of the fifth lens element are aspheric;
wherein each of the first through fifth lens elements with refractive power is single and non-cemented, the image capturing lens assembly has a total of five lens elements with refractive power and further comprises a stop, 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 stop and the image-side surface of the fifth lens element is Sd, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is Td, an axial distance between the image-side surface of the fifth lens element and an image plane is BL, and the following relationships are satisfied:
0 <T 45 /T 34<0.8;
0.7 <Sd/Td< 1.2; and
0.1 <BL/Td< 0.7.
2. The image capturing lens assembly of claim 1 , wherein a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the object-side surface of the fifth lens element is R9, and the following relationship is satisfied:
| R 8 /R 9|<0.80.
3. The image capturing lens assembly of claim 2 , wherein the object-side surface of the fourth lens element is concave and the image-side surface of the fourth lens element is convex.
4. The image capturing lens assembly of claim 3 , wherein the third lens element has positive refractive power.
5. The image capturing lens assembly of claim 3 , wherein a focal length of the image capturing lens assembly is f, a focal length of the fifth lens element is f5, and the following relationship is satisfied:
0 <f/f 5<0.8.
6. The image capturing lens assembly of claim 3 , wherein the fourth lens element has negative refractive power.
7. The image capturing lens assembly of claim 3 , wherein a vertical distance between a maximum effective diameter position on the object-side surface of the first lens element and an optical axis is SD11, a vertical distance between a maximum effective diameter position on the image-side surface of the fifth lens element and the optical axis is SD52, and the following relationship is satisfied:
0.2 <SD 11 /SD 52<0.6.
8. The image capturing lens assembly of claim 3 , wherein at least one inflection point is formed on at least one of the object-side surface and the image side surface of at least one of the first through fifth lens elements.
9. The image capturing lens assembly of claim 3 , wherein a curvature radius of the object-side surface of the fourth lens element is R7, a focal length of the image capturing lens assembly is f, and the following relationship is satisfied:
−0.35 <R 7 /f< 0.
10. The image capturing lens assembly of claim 2 , wherein a focal length of the image capturing lens assembly is f, a focal length of the fourth lens element is f4, and the following relationship is satisfied:
−2.0 <f/f 4<1.5.
11. The image capturing lens assembly of claim 10 , wherein the focal length of the image capturing lens assembly is f, the focal length of the fourth lens element is f4, and the following relationship is satisfied:
−1.5 <f/f 4<0.3.
12. The image capturing lens assembly of claim 10 , wherein a central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, and the following relationship is satisfied:
0.1 <CT 4 /CT 5<0.5.
13. The image capturing lens assembly of claim 10 , wherein the axial distance between the third lens element and the fourth lens element is T34, the axial distance between the fourth lens element and the fifth lens element is T45, and the following relationship is satisfied:
0.02 <T 45 /T 34<0.5.
14. The image capturing lens assembly of claim 1 , wherein an axial distance between the object-side surface of the first lens element and the image plane is TL, a focal length of the image capturing lens assembly is f, and the following relationship is satisfied:
0.7 <TL/f< 1.4.
15. The image capturing lens assembly of claim 14 , wherein the focal length of the image capturing lens assembly is f, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationship is satisfied:
| f/R 9 |+|f/R 10|<1,5.
16. The image capturing lens assembly of claim 1 , wherein an Abbe number of the second lens element is V2, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, and the following relationship is satisfied:
0.5<( V 2 +V 4)/ V 5<1.0.
17. An image capturing lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power having a convex object-side surface;
a second lens element having negative refractive power;
a third lens element having refractive power;
a fourth lens element having refractive power, wherein both of an object-side surface and an image-side surface of the fourth lens element are aspheric; and
a fifth lens element with positive refractive power having a concave object-side surface and a convex image-side surface, wherein both of the object-side surface and the image-side surface of the fifth lens element are aspheric;
wherein each of the first through fifth lens elements with refractive power is single and non-cemented, the image capturing lens assembly has a total of five lens elements with refractive power and further comprises a stop, at least one inflection point is formed on at least one of the object-side surface and the image-side surface of at least one of the first through fifth lens elements, 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 stop and the image-side surface of the fifth lens element is Sd, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is Td, and the following relationships are satisfied:
0 <T 45 /T 34<1.2; and
0.7 <Sd/Td< 1.2.
18. The image capturing lens assembly of claim 17 , wherein the object-side surface of the fourth lens element is concave and the image-side surface of the fourth lens element is convex.
19. The image capturing lens assembly of claim 18 , wherein a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, and the following relationship is satisfied:
−0.8 <f 4 /f 5<0.8.
20. The image capturing lens assembly of claim 18 , wherein the third lens element has positive refractive power, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the object-side surface of the fifth lens element is R9, and the following relationship is satisfied:
R 8 /R 9|<0.80.
21. The image capturing lens assembly of claim 18 , wherein the axial distance between the third lens element and the fourth lens element is T34, the axial distance between the fourth lens element and the fifth lens element is T45, and the following relationship is satisfied:
0.02 <T 45 /T 34<0.5.
22. The image capturing lens assembly of claim 18 , wherein a curvature radius of the object-side surface of the fourth lens element is R7, a curvature radius of the image-side surface of the fourth lens element is R8, and the following relationship is satisfied:
−0.3<( R 7 −R 8)/( R 7 +R 8)<0.
23. The image capturing lens assembly of claim 17 , wherein a vertical distance between a maximum effective diameter position on the object-side surface of the first lens element and an optical axis is SD11, a vertical distance between a maximum effective diameter position on the image-side surface of the fifth lens element and the optical axis is SD52, and the following relationship is satisfied:
0.2 <SD 11 /SD 52<0.6.
24. The image capturing lens assembly of claim 17 , wherein a focal length of the image capturing lens assembly is f, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, and the following relationship is satisfied:
| f/R 9 |+|f/R 10|<1.5.
25. The image capturing lens assembly of claim 17 , wherein an Abbe number of the second lens element is V2, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, and the following relationship is satisfied:
0.5<( V 2 +V 4)/ V 5<1.0.