Mobile device and optical imaging lens thereof

Patent metadata

Field	Value
Publication number	US-10345553-B2
Application number	US-201615092436-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Sep 6, 2013
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, each having an object-side surface facing toward an object side and an image-side surface facing toward an image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of a periphery of the first lens element and the image-side surface of the second lens element comprises a convex portion in a vicinity of the optical axis. The fourth lens element has positive refractive power. The image-side surface of the sixth lens element comprises a concave portion in a vicinity of the optical axis and the optical imaging lens as a whole has only the six lens elements having refractive power.

First claim

What is claimed is:

1. An optical imaging lens, comprising sequentially from an object side to an image side along an optical axis, first, second, third, fourth, fifth, and sixth lens elements, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein:
the image-side surface of the first lens element comprises a concave portion in a vicinity of a periphery of the first lens element;
the image-side surface of the second lens element comprises a convex portion in a vicinity of the optical axis in a central region of the second lens element;
the image-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element;
the image-side surface of the fourth lens element comprises a convex portion in a vicinity of the optical axis in the central region of the fourth lens element and the fourth lens element has positive refractive power;
the image-side surface of the sixth lens element comprises a concave portion in a vicinity of the optical axis; and
the optical imaging lens as a whole has only the six lens elements having refractive power,
wherein Fno is an f-number of the optical imaging lens, T6 is a central thickness of the sixth lens element along the optical axis, and Fno and T6 satisfy the relation:
Fno/T 6≤6.6 mm −1 .

2. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, and f and Fno satisfy the relation:
f/Fno≤ 4.2 mm.

3. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, G12 is an air gap between the first lens element and the second lens element along the optical axis, and f and G12 satisfy the relation:
f/G 12≤49.7.

4. The optical imaging lens of claim 1 , wherein G12 is an air gap between the first lens element and the second lens element along the optical axis, and Fno and G12 satisfy the relation:
Fno/G 12≤24.6 mm −1 .

5. The optical imaging lens of claim 1 , wherein G12 is an air gap between the first lens element and the second lens element along the optical axis, G34 is an air gap between the third lens element and the fourth lens element along the optical axis, and G12 and G34 satisfy the relation:
G 34/ G 12≤7.0.

6. The optical imaging lens of claim 1 , wherein BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and BFL and G12 satisfy the relation:
BFL/G 12≤16.5.

7. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, T4 is a central thickness of the fourth lens element along the optical axis, and f and T4 satisfy the relation:
f/T 4≤12.4.

8. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, and f and BFL satisfy the relation:
f/BFL≤ 3.9.

9. The optical imaging lens of claim 1 , wherein T1 is a central thickness of the first lens element along the optical axis, and Fno and T1 satisfy the relation:
Fno/T 1≤5.8 mm −1 .

10. The optical imaging lens of claim 1 , wherein ALT is a sum of thicknesses of all six lens elements along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and ALT and G12 satisfy the relation:
ALT/G 12≤36.5.

11. The optical imaging lens of claim 1 , wherein TTL is a distance between the object-side surface of the first lens element and an image plane along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and TTL and G12 satisfy the relation:
TTL/G 12≤64.8.

12. The optical imaging lens of claim 1 , wherein T4 is a central thickness of the fourth lens element along the optical axis, and Fno and T4 satisfy the relation:
Fno/T 4≤5.9 mm −1 .

13. The optical imaging lens of claim 1 , wherein G12 is an air gap between the first lens element and the second lens element along the optical axis, and T6 and G12 satisfy the relation:
T 6/ G 12≤5.5.

14. The optical imaging lens of claim 1 , wherein Gaa is a sum of all five air gaps from the first lens element to the sixth lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and Gaa and G12 satisfy the relation:
Gaa/G 12≤12.1.

15. The optical imaging lens of claim 1 , wherein T3 is a central thickness of the third lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and T3 and G12 satisfy the relation:
T 3/ G 12≤2.9.

16. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, T5 is a central thickness of the fifth lens element along the optical axis, f and T5 satisfy the relation:
f/T 5≤12.5.

17. The optical imaging lens of claim 1 , wherein T1 is a central thickness of the first lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, and T1 and G12 satisfy the relation:
T 1/ G 12≤4.9.

18. The optical imaging lens of claim 1 , wherein Gaa is a sum of all five air gaps from the first lens element to the sixth lens element along the optical axis, T4 is a central thickness of the fourth lens element along the optical axis, and Gaa and T4 satisfy the relation:
Gaa/T 4≤5.4.

19. The optical imaging lens of claim 1 , wherein f is an effective focal length of the optical imaging lens, T2 is a central thickness of the second lens element along the optical axis, f and T2 satisfy the relation:
f/T 2≤9.8.

Assignees

• Genius Electronic Optical Co Ltd

Inventors

• Chen Shih Han
• Hsieh Hung Chien
• Ye Long

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/62

  having six components only · CPC title