IP Library › Granted Patent US 10,302,909
Granted Patent B2
US 10,302,909 · App. 15/299,522 · Granted May 28, 2019

Six-piece optical lens system

Inventor: Fei-Hsin Tsai (Tai-Chung, TW)
Assignee: NEWMAX TECHNOLOGY CO., LTD.
G02B13/0045G02B5/208G02B9/62
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Quick Facts
Patent No.
US 10,302,909
App. No.
15/299,522
Granted
May 28, 2019
Kind
B2
Abstract

A six-piece optical lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a negative refractive power, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power, a fifth lens element with a positive refractive power, and a sixth lens element with a negative refractive power. Such arrangements can provide a miniaturized six-piece optical lens system having a big stop and high image quality.

Claims (32)

1. A six-piece optical lens system, in order from an object side to an image side, comprising:

a stop;

a first lens element with a positive refractive power, having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the first lens element being aspheric;

a second lens element with a negative refractive power, having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the second lens element being aspheric; and

a third lens element with a positive refractive power, having an object-side surface being convex near the optical axis an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the third lens element being aspheric;

a fourth lens element with a negative refractive power, having an object-side surface being concave near the optical axis an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the fourth lens element being aspheric;

a fifth lens element with a positive refractive power, having an object-side surface being convex near the optical axis an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the fifth lens element being aspheric; and

a sixth lens element with a negative refractive power, having an object-side surface being concave near the optical axis an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the sixth lens element being aspheric; and the sixth lens element is provided with at least one inflection point;

wherein the lens system has a total of six lens elements, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and they satisfy the relation: −1.3<f3/f4<−0.7.

2. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, and they satisfy the relation: −0.7<f1/f2<−0.3.

3. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element is f2, the focal length of the third lens element is f3, and they satisfy the relation: −1.0<f2/f3<−0.6.

4. The six-piece optical lens system as claimed in claim 1 , wherein the focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, and they satisfy the relation: −1.9<f4/f5<−1.3.

5. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, and they satisfy the relation: −1.4<f5/f6<−0.7.

6. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element is f1, the focal length of the third lens element is f3, and they satisfy the relation: 0.2<f1/f3<0.6.

7. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element is f2, the focal length of the fourth lens element is f4, and they satisfy the relation: 0.6<f2/f4<1.0.

8. The six-piece optical lens system as claimed in claim 1 , wherein the focal length of the third lens element is f3, a focal length of the fifth lens element is f5, and they satisfy the relation: 1.3<f3/f5<2.0.

9. The six-piece optical lens system as claimed in claim 1 , wherein the focal length of the fourth lens element is f4, a focal length of the sixth lens element is f6, and they satisfy the relation: 1.3<f4/f6<2.0.

10. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element is f1, a focal length of the second lens element and the third lens element combined is f23, and they satisfy the relation: −0.1<f1/f23<−0.03.

11. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element and the third lens element combined is f23, the focal length of the fourth lens element is f4, and they satisfy the relation: 3.0<f23/f4<7.0.

12. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element and the third lens element combined is f23, a focal length of the fourth lens element and the fifth lens element combined is f45, and they satisfy the relation: −5.0<f23/f45<−3.8.

13. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element and the second lens element combined is f12, a focal length of the third lens element and the fourth lens element combined is f34, and they satisfy the relation: −0.1<f12/f34<−0.03.

14. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the third lens element and the fourth lens element combined is f34, a focal length of the fifth lens element and the sixth lens element combined is f56, and they satisfy the relation: −3.5<f34/f56<−2.3.

15. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the fourth lens element and the fifth lens element combined is f45, a focal length of the sixth lens element is f6, and they satisfy the relation: −2.6<f45/f6<−1.3.

16. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element is f1, a focal length of the second lens element, the third lens element and the fourth lens element combined is f234, and they satisfy the relation: −0.7<f1/f234<−0.3.

17. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element, the third lens element and the fourth lens element combined is f234, a focal length of the fifth lens element is f5, and they satisfy the relation: −1.6<f234/f5<−1.0.

18. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the second lens element, the third lens element and the fourth lens element combined is f234, a focal length of the fifth lens element and the sixth lens element combined is f56, and they satisfy the relation: −0.35<f234/f56<−0.05.

19. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element, the second lens element and the third lens element combined is f123, the focal length of the fourth lens element is f4, and they satisfy the relation: −0.6<f123/f4<−0.2.

20. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element, the second lens element and the third lens element combined is f123, a focal length of the fourth lens element and the fifth lens element combined is f45, and they satisfy the relation: 0.15<f123/f45<0.5.

21. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the first lens element, the second lens element and the third lens element combined is f123, a focal length of the fourth lens element, the fifth lens element and the sixth lens element combined is f456, and they satisfy the relation: −0.6<f123/f456<−0.2.

22. The six-piece optical lens system as claimed in claim 1 , wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and they satisfy the relation: 30<V1−V2<42.

23. The six-piece optical lens system as claimed in claim 1 , wherein an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, and they satisfy the relation: 30<V3−V4<42.

24. The six-piece optical lens system as claimed in claim 1 , wherein a focal length of the six-piece optical lens system is f, a distance from the object-side surface of the first lens element to an image plane along the optical axis is TL, and they satisfy the relation: 0.6<f/TL<0.95.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 21, 2016
From: TSAI, FEI-HSIN
To: NEWMAX TECHNOLOGY CO., LTD.
Reel/Frame 040461/0827 →
Continuity (1)
Related Publication 20180113282A1 · Apr 26, 2018