IP Library › Granted Patent US 10,175,461
Granted Patent B1
US 10,175,461 · App. 15/641,315 · Granted Jan 8, 2019

Six-piece optical lens system with a wide field of view

Inventor: Shu-Tzu Lai (Tai-Chung, TW)
Assignee: NEWMAX TECHNOLOGY CO., LTD.
G02B13/0045G02B9/62G02B13/06
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Quick Facts
Patent No.
US 10,175,461
App. No.
15/641,315
Granted
Jan 8, 2019
Kind
B1
Abstract

A six-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a second lens element with a positive refractive power, a stop, 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. Such arrangements can provide a six-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Claims (31)

1. A six-piece optical lens system with a wide field of view, in order from an object side to an image side, comprising:

a first lens element with a negative 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 positive refractive power, having an object-side surface being concave near the optical axis and 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 second lens element being aspheric;

a stop;

a third lens element with a positive refractive power, having an object-side surface being convex near the optical axis and 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 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 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 and 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 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 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 sixth lens element being aspheric and provided with at least one inflection point.

2. The six-piece optical lens system with a wide field of view 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: −0.1<f1/f2<−0.005.

3. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and they satisfy the relation: 25<f2/f3<180.

4. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein 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: −0.6<f3/f4<−0.25.

5. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a 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.

6. The six-piece optical lens system with a wide field of view 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: −1.3<f5/f6<−0.8.

7. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, and they satisfy the relation: −2.3<f1/f3<−1.7.

8. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the second lens element is f2, a focal length of the fourth lens element is f4, and they satisfy the relation: −70<f2/f4<−15.

9. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the third lens element is f3, a focal length of the fifth lens element is f5, and they satisfy the relation: 0.5<f3/f5<0.9.

10. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the fourth lens element is f4, a focal length of the sixth lens element is f6, and they satisfy the relation: 1.5<f4/f6<2.0.

11. The six-piece optical lens system with a wide field of view 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: −2.4<f1/f23<−1.65.

12. The six-piece optical lens system with a wide field of view 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: 0.15<f23/f45<0.6.

13. The six-piece optical lens system with a wide field of view 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<−1.4.

14. The six-piece optical lens system with a wide field of view 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: −1.7<f12/f34<−1.1.

15. The six-piece optical lens system with a wide field of view 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: −1.6<f34/f56<−0.65.

16. The six-piece optical lens system with a wide field of view 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: −1.8<f1/f234<−1.0.

17. The six-piece optical lens system with a wide field of view 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: −1.6<f234/f56<−0.6.

18. The six-piece optical lens system with a wide field of view 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 is f4, and they satisfy the relation: −0.65<f123/f4<−0.35.

19. The six-piece optical lens system with a wide field of view 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: 0.2<f123/f45<0.75.

20. The six-piece optical lens system with a wide field of view 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: 1.0<f123/f456<1.55.

21. The six-piece optical lens system with a wide field of view 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, the fourth lens element, the fifth lens element and the sixth lens element combined is f3456, and they satisfy the relation: −2.7<f12/f3456<−1.95.

22. The six-piece optical lens system with a wide field of view 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.

23. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein an Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, and they satisfy the relation: 30<V5−V6<42.

24. The six-piece optical lens system with a wide field of view as claimed in claim 1 , wherein a focal length of the six-piece optical lens system with a wide field of view 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: 0.25<f/TL<0.6.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 4, 2017
From: LAI, SHU-TZU
To: NEWMAX TECHNOLOGY CO., LTD.
Reel/Frame 043084/0693 →
Cited By (4)
US 12,197,038 US 12,481,136 US 12,510,731 US 12,681,268