Imaging lens, and electronic apparatus including the same

Patent metadata

Field	Value
Publication number	US-9366846-B2
Application number	US-201414497355-A
Country	US
Kind code	B2
Filing date	Sep 26, 2014
Priority date	May 29, 2014
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

An imaging lens includes first to sixth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant optical parameters, a larger field of view and a shorter system length of the imaging lens may be achieved while maintaining good optical performance.

First claim

What is claimed is:

1. An imaging lens comprising, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element having a refractive power, an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:
said first lens element has a negative refractive power, said object-side surface of said first lens element is a convex surface that has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said first lens element;
said image-side surface of said second lens element has a convex portion in a vicinity of a periphery of said second lens element;
said third lens element has a positive refractive power and said image-side surface of said third lens element has a convex portion in a vicinity of a periphery of said third lens element;
said object-side surface of said fourth lens element has a concave portion in a vicinity of a periphery of said fourth lens element;
said object-side surface of said fifth lens element has a concave portion in a vicinity of a periphery of said fifth lens element, said image-side surface of said fifth lens element has a concave portion in a vicinity of the optical axis;
said image-side surface of said sixth lens element has a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said sixth lens element;
said imaging lens does not include any lens element with refractive power other than said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element; and
said imaging lens further satisfying T 3 /T 4 ≧1.7, where T 3 represents a thickness of said third lens element at the optical axis and T 4 represents a thickness of said fourth lens element at the optical axis.

2. The imaging lens as claimed in claim 1 , satisfying Gaa/T 5 ≧1.25, where Gaa represents a sum of air gap widths among said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element at the optical axis, and T 5 represents a thickness of said fifth lens element at the optical axis.

3. The imaging lens as claimed in claim 2 , further satisfying T 6 /T 1 ≦2.6, where T 1 represents a thickness of said first lens element at the optical axis and T 6 represents a thickness of said sixth lens element at the optical axis.

4. The imaging lens as claimed in claim 2 , further satisfying (G 34 +G 56 )/G 12 ≦5.0, where G 12 represents an air gap width between said first lens element and said second lens element at the optical axis, G 34 represents an air gap width between said third lens element and said fourth lens element at the optical axis, and G 56 represents an air gap width between said fifth lens element and said sixth lens element at the optical axis.

5. The imaging lens as claimed in claim 1 , satisfying T 6 /T 3 ≦1.5, where T 6 represents a thickness of said sixth lens element at the optical axis.

6. The imaging lens as claimed in claim 5 , further satisfying ALT/T 5 ≧5.0, where ALT represents a sum of thicknesses of said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element at the optical axis, and T 5 represents a thickness of said fifth lens element at the optical axis.

7. The imaging lens as claimed in claim 1 , satisfying ALT/G 12 ≦30, where ALT represents a sum of thicknesses of said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element at the optical axis, and G 12 represents an air gap width between said first lens element and said second lens element at the optical axis, and said image-side surface of said fifth lens element has a concave portion in a vicinity of the optical axis.

8. The imaging lens as claimed in claim 7 , further satisfying (G 23 +G 34 )/T 4 ≦1.5, where G 23 represents an air gap width between said second lens element and said third lens element at the optical axis, G 34 represents an air gap width between said third lens element and said fourth lens element at the optical axis.

9. The imaging lens as claimed in claim 7 , further satisfying T 2 /(G 45 +G 56 )≦3.0, where G 45 represents an air gap width between said fourth lens element and said fifth lens element at the optical axis, G 56 represents an air gap width between said fifth lens element and said sixth lens element at the optical axis, and T 2 represents a thickness of said second lens element at the optical axis.

10. The imaging lens as claimed in claim 1 , satisfying T 6 /G 12 ≦7.0, where T 6 represents a thickness of said sixth lens element at the optical axis and G 12 represents an air gap width between said first lens element and said second lens element at the optical axis.

11. The imaging lens as claimed in claim 10 , further satisfying T 5 /T 1 ≦2.1, where T 1 represents a thickness of said first lens element at the optical axis and T 5 represents a thickness of said fifth lens element at the optical axis.

12. The imaging lens as claimed in claim 10 , further satisfying Gaa/(G 23 +G 34 )≧2.0, where Gaa represents a sum of air gap widths among said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element at the optical axis, G 23 represents an air gap width between said second lens element and said third lens element at the optical axis, and G 34 represents an air gap width between said third lens element and said fourth lens element at the optical axis.

13. The imaging lens as claimed in claim 1 , satisfying (G 23 +G 34 )/G 12 ≦4.8, where G 12 represents an air gap width between said first lens element and said second lens element at the optical axis, G 23 represents an air gap width between said second lens element and said third lens element at the optical axis, and G 34 represents an air gap width between said third lens element and said fourth lens element at the optical axis.

14. The imaging lens as claimed in claim 13 , further satisfying T 5 /(G 45 +G 56 )≦2.7, where T 5 represents a thickness of said fifth lens element at the optical axis, G 45 represents an air gap width between said fourth lens element and said fifth lens element at the optical axis, and G 56 represents an air gap width between said fifth lens element and said sixth lens element at the optical axis.

15. The imaging lens as claimed in claim 13 , further satisfying T 5 /T 3 ≦1.05, where—T 5 represents a thickness of said fifth lens element at the optical axis.

16. An electronic apparatus comprising:
a housing; and
an imaging module disposed in said housing, and including an imaging lens as claimed in claim 1 , a barrel on which said imaging lens is disposed, a holder unit on which said barrel is disposed, and an image sensor disposed at the image side of said imaging lens.

17. The imaging lens as claimed in claim 1 , wherein said object-side surface of said third lens element has a convex portion in a vicinity of a periphery of said third lens element.

Assignees

• Genius Electronic Optical Co Ltd

Inventors

• Chen Shih-Han
• Wang Kailun
• Chen Baina

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G02B9/62

  having six components only · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• H04N5/2254

  Electricity · mapped topic