Optical image capturing system
View Patent ↗An optical image capturing system, from an object side to an image side, comprises a first, second, third, fourth, fifth, and sixth lens elements. The first lens element with refractive power has a convex object-side surface. The second through fifth lens elements have refractive power and both of an object-side surface and an image-side surface of the four lens elements are aspheric. The sixth lens with negative refractive power has a concave object-side surface. Both of the image-side and object-side surfaces of the six lens elements are aspheric and at least one of the two surfaces has inflection points. Each of the six lens elements may have refractive power. When specific conditions are satisfied, the optical image capturing system can have a better optical path adjusting ability to acquire better imaging quality.
1. An optical image capturing system, from an object side to an image side, comprising:
a first lens element with refractive power;
a second lens element with refractive power;
a third lens element with refractive power;
a fourth lens element with refractive power;
a fifth lens element with refractive power;
a sixth lens element with refractive power; and
an image plane;
wherein the optical image capturing system comprises the six lens elements with refractive power, at least one of the first through sixth lens elements has positive refractive power, the object-side surface and the image-side surface of the sixth lens element are aspheric, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5, and f6, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance from the object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is InTL, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an object-side surface of each of the sixth lens elements is InRSO, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an image-side surface of each of the sixth lens elements is InRSI, a sum of InRSO and InRSI is Σ|InRS|, and the following relation is satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3.0 and 0<Σ|InRS|/InTL≦5.
2. The optical image capturing system of claim 1 , wherein TV distortion for image formation in the optical image capturing system is TDT and the following relation is satisfied: |TDT|<60%.
3. The optical image capturing system of claim 1 , wherein optical distortion for image formation in the optical image capturing system is ODT and the following relation is satisfied: |ODT|≦50%.
4. The optical image capturing system of claim 1 , wherein the following relation is satisfied: 0 mm<HOS≦20 mm.
5. The optical image capturing system of claim 1 , wherein half of a view angle of the optical image capturing system is HAF and the following relation is satisfied: 10 deg≦HAF≦70 deg.
6. The optical image capturing system of claim 1 , wherein at least two lens elements among the six lens elements respectively have at least one inflection point on at least one surface thereof.
7. The optical image capturing system of claim 1 , wherein the following relation is satisfied: 0.6≦InTL/HOS≦0.9.
8. The optical image capturing system of claim 1 , wherein a total central thickness of all lens elements with refractive power is ΣTP, and the following relation is satisfied: 0.45≦ΣTP/InTL≦0.95.
9. The optical image capturing system of claim 1 , further comprising an aperture stop, wherein a distance from the aperture stop to the image plane is InS, and the following relation is satisfied: 0.5≦InS/HOS≦1.1.
10. An optical image capturing system, from an object side to an image side, comprising:
a first lens element with refractive power;
a second lens element with refractive power;
a third lens element with refractive power;
a fourth lens element with refractive power;
a fifth lens element with refractive power;
a sixth lens element with negative refractive power; and
an image plane;
wherein the optical image capturing system comprises the six lens elements with refractive power and at least two lens elements among the six lens elements respectively have at least one inflection point on at least one surface thereof, at least one of the first through fifth lens elements has positive refractive power, an object-side surface and an image-side surface of the sixth lens element are aspheric, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5, and f6, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance from an object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is InTL, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an object-side surface of each of the sixth lens elements is InRSO, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an image-side surface of each of the sixth lens element is InRSI, a sum of InRSO and InRSI is Σ|InRS|, and the following relation is satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3.0 and 0<Σ|InRS|/InTL≦5.
11. The optical image capturing system of claim 10 , wherein the following relation is satisfied: 0 mm<Σ|InRS|≦20 mm.
12. The optical image capturing system of claim 10 , wherein a ratio f/fp of the focal length f of the optical image capturing system to a focal length fp of each of lens elements with positive refractive power is PPR and the following relation is satisfied: 0.5≦ΣPPR≦3.0.
13. The optical image capturing system of claim 10 , wherein TV distortion and optical distortion for image formation in the optical image capturing system are TDT and ODT, respectively, and the following relation is satisfied: |TDT|<60% and |ODT|≦50%.
14. The optical image capturing system of claim 10 , wherein an image-side surface of the fifth lens element has at least one inflection point and the object-side surface of the sixth lens element has at least one inflection point.
15. The optical image capturing system of claim 10 , wherein the second lens element has negative refractive power.
16. The optical image capturing system of claim 10 , wherein a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the object-side surface of the fifth lens element is InRS51, a distance in parallel with the optical axis from a maximum effective diameter position to an axial point on the image-side surface of the fifth lens element is InRS52, a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the object-side surface of the sixth lens element is InRS61, a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the image-side surface of the sixth lens element is InRS62, and the following relation is satisfied: 0 mm<|InRS51|+|InRS52|+|InRS61|+|InRS62|≦6 mm.
17. The optical image capturing system of claim 16 , wherein the following relation is satisfied: 0<(|InRS51|+|InRS52|+|InRS61|+|InRS62|)/InTL≦3.
18. The optical image capturing system of claim 16 , wherein the following relation is satisfied: 0<(|InRS51|+|InRS52|+|InRS61|+|InRS62|)/HOS≦2.
19. The optical image capturing system of claim 10 , wherein a sum of focal lengths of all lens elements with positive refractive power of the optical image capturing system is Σ PP and the following relation is satisfied: 0 mm<ΣPP≦2000 mm and 0<|f1|/ΣPP≦0.99.
20. An optical image capturing system, from an object side to an image side, comprising:
a first lens element with refractive power;
a second lens element with refractive power;
a third lens element with refractive power;
a fourth lens element with refractive power;
a fifth lens element with positive refractive power and at least one of an image-side surface and an object-side surface of the fifth lens element having at least one inflection point;
a sixth lens element with negative refractive power and at least one of an image-side surface and an object-side surface of the sixth lens element having at least one inflection point; and
an image plane;
wherein the optical image capturing system comprises the six lens elements with refractive power and at least one of an object-side surface and an image-side surface of at least one of the first through fourth lens elements has at least one inflection point, an object-side surface and an image-side surface of the sixth lens element are aspheric, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5, and f6, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, half of a maximal view angle of the optical image capturing system is HAF, a distance from an object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is InTL, optical distortion and TV distortion for image formation in the optical image capturing system are ODT and TDT, respectively, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an object-side surface of each of the sixth lens elements is InRSO, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective diameter position to an axial point on an image-side surface of each of the sixth lens elements is InRSI, a sum of InRSO and InRSI is Σ|InRS|, and the following relation is satisfied: 1.2≦f/HEP≦6.0, 0.4≦|tan(HAF)|≦3.0, 0.5≦HOS/f≦3.0, |TDT|<1.5%, |ODT|≦2.5% and 0<Σ|InRS|/InTL≦5.
21. The optical image capturing system of claim 20 , wherein a sum of focal lengths of all lens elements with positive refractive power of the optical image capturing system is ΣPP and the following relation is satisfied: 0 mm<ΣPP≦2000 mm and 0<|f1|/ΣPP≦0.99.
22. The optical image capturing system of claim 20 , wherein the following relation is satisfied: 0 mm<HOS≦20 mm.
23. The optical image capturing system of claim 20 , wherein a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the object-side surface of the fifth lens element is InRS51, a distance in parallel with the optical axis from a maximum effective diameter position to an axial point on the image-side surface of the fifth lens element is InRS52, a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the object-side surface of the sixth lens element is InRS61, a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the image-side surface of the sixth lens element is InRS62, and the following relation is satisfied: 0 mm<|InRS51|+|InRS52|+|InRS61|+|InRS62|≦6 mm.
24. The optical image capturing system of claim 23 , wherein the following relation is satisfied: 0<(|InRS51|+|InRS52|+|InRS61|+|InRS62|)/InTL≦3.
25. The optical image capturing system of claim 23 , further comprising an aperture stop and an image sensing device disposed on the image plane, wherein a distance from the aperture stop to the image plane is InS and the following relation is satisfied: 0.5≦InS/HOS≦1.1.