Miniature image capture lens

• US 8,125,720 B2
• Filed: 03/24/2009
• Issued: 02/28/2012
• Est. Priority Date: 03/24/2009
• Status: Active Grant

• Current Assignee: Visera Technologies Company Limited (Taiwan Semiconductor Manufacturing Company Limited), Omnivision Technologies Incorporated (Will Semiconductor Co., Ltd. Shanghai)
• Original Assignee: Visera Technologies Company Limited (Taiwan Semiconductor Manufacturing Company Limited), Omnivision Technologies Incorporated (Will Semiconductor Co., Ltd. Shanghai)
• Inventors: Chang, Wei-Chung, Deng, Jau-Jan
• Primary Examiner(s): GREECE, JAMES R
• Application Number:
  US12/409,982
• Publication Number:
  US 20100246030A1
• Time in Patent Office: 1,071 Days
• Field of Search: 359793-794, 359/717, 359/708
• US Class Current: 359/793
• CPC Class Codes: G02B 13/003 having two lenses
• CPC Class Codes: G02B 13/006 at least one element being a compound optical element, e.g. cemented elements
• CPC Class Codes: G02B 13/0085 employing wafer level optics
• CPC Class Codes: G02B 9/04 having two components only

Abstract

A miniature image capture lens is disclosed, comprising a wafer scale lens system, which comprises a first lens group including a first substrate, a first surface disposed on a first side of the first substrate, a second surface disposed on a second side of the first substrate, and a second lens group including a second substrate, a third surface disposed on a first side of the second substrate, and a fourth surface disposed on a second side of the second substrate, wherein the first surface, the second surface, the third surface and the fourth surface are aspherical, one of the first surface and the second surface, and one of the third surface and the fourth surface have a high refraction index Nd_h and a high abbe number Vd_h, another one of the first surface and the second surface, and another one of the third surface and the fourth surface have a low refraction index Nd_l and a low abbe number Vd_l, and the miniature image capture lens meets the following conditions:
Nd_—h=1.58˜1.62;
Nd_—l=1.48˜1.53;
Nd_—l/Nd_—h=0.91˜0.97;
Vd_—h=35˜45; and

• • Vd_l=25˜35, wherein one of the first and second surfaces is convex shaped and another one of the first and second surfaces is concave shaped, and one of the third and fourth surfaces is convex shaped and another one of the third and fourth surfaces is concave shaped.

Claims

1. A miniature image capture lens, comprising:

an aperture diaphragm having an aperture through which an image is captured; and

a wafer scale lens system, comprising;

a first lens group, including;

a first substrate;

a first lens disposed on a first side of the first substrate; and

a second lens disposed on a second side of the first substrate; and

a second lens group, including;

a second substrate;

a third lens disposed on a first side of the second substrate; and

a fourth lens disposed on a second side of the second substrate,

wherein the first lens, the second lens, the third lens and the fourth lens are aspherical, one of the first lens and the second lens, and one of the third lens and the fourth lens have a high refraction index Nd_h and a high abbe number Vd_h, another one of the first lens and the second lens, and another one of the third lens and the fourth lens have a low refraction index Nd_l and a low abbe number Vd_l, the high refraction index Nd_h is greater than the low refraction index Nd_l, and the high abbe number Vd_h is greater than the low abbe number Vd_l, and the miniature image capture lens meets the following conditions;

Nd_—

h=1.58˜

1.62;

Nd_—

l=1.48˜

1.53;

Nd_—

l/Nd_—

h=0.91˜

0.97;

Vd_—

h=35˜

45; and

Vd_—

l=25˜

35.

2. The miniature image capture lens as claimed in claim 1, wherein the first lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, the second lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, the third lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, and the fourth lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped.

3. The miniature image capture lens as claimed in claim 1, wherein the first lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped, the second lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped, the third lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped, and the fourth lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped.

4. The miniature image capture lens as claimed in claim 1, wherein the first lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, the second lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, the third lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, and the fourth lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped.

5. The miniature image capture lens as claimed in claim 1, wherein the first lens has the low refraction index Nd_l, the low abbe number Vd_l, and is convex shaped, the second lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped, the third lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped (negative curvature), and the fourth lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped.

6. The miniature image capture lens as claimed in claim 1, wherein the first lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped, the second lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped, the third lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped, and the fourth lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped.

7. The miniature image capture lens as claimed in claim 1, wherein the first lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, the second lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, the third lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, and the fourth lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped.

8. The miniature image capture lens as claimed in claim 1, wherein the first lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped, the second lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped, the third lens has the high refraction index Nd_h, the high abbe number Vd_h and is concave shaped, and the fourth lens has the low refraction index Nd_l, the low abbe number Vd_l and is convex shaped.

9. The miniature image capture lens as claimed in claim 1, wherein the first lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, the second lens has the high refraction index Nd_h, the high abbe number Vd_h and is convex shaped, the third lens has the low refraction index Nd_l, the low abbe number Vd_l and is concave shaped, and the fourth lens has the high refraction index Nd_h and is convex shaped.

10. The miniature image capture lens as claimed in claim 1, wherein the first lens and the second lens are formed of different materials, and the third lens and the fourth lens are formed of different materials.

11. The miniature image capture lens as claimed in claim 1, further comprising a first spacer between the first lens group and the second group.

12. The miniature image capture lens as claimed in claim 1, further comprising a IR cut filter coated on the first lens of the first lens group.

13. The miniature image capture lens as claimed in claim 1, further comprising a back cover glass, and a second spacer disposed between the back cover glass and the second lens group.

14. The miniature image capture lens as claimed in claim 1, wherein miniature image capture lens reduces optical dispersion according to the first, second, third, and fourth lenses at the specific condition.

15. The miniature image capture lens as claimed in claim 1, wherein each of the first and second lenses has aspect ration less than the third and fourth lenses.

16. A miniature image capture lens, comprising:

an aperture diaphragm having an aperture through which an image is captured; and

a wafer scale lens system, comprising;

a first lens group, including;

a first substrate;

a first lens disposed on a first side of the first substrate; and

a second lens disposed on a second side of the first substrate; and

a second lens group, including;

a second substrate;

a third lens disposed on a first side of the second substrate; and

a fourth lens disposed on a second side of the second substrate,

wherein the first lens, the second lens, the third lens and the fourth lens are aspherical, one of the first lens and the second lens, and one of the third lens and the fourth lens have a high refraction index Nd_h and a high abbe number Vd_h, another one of the first lens and the second lens, and another one of the third lens and the fourth lens have a low refraction index Nd_l and a low abbe number Vd_l, the high refraction index Nd_h is greater than the low refraction index Nd_l, and the high abbe number Vd_h is greater than the low abbe number Vd_l, and the miniature image capture lens meets the following conditions;

Nd_—

h=1.58˜

1.62;

Nd_—

l=1.48˜

1.53;

Nd_—

l/Nd_—

h=0.91˜

0.97;

Vd_—

h=35˜

45; and

Vd_—

l=25˜

35

wherein one of the first and second lenses is convex shaped and another one of the first and second lenses is concave shaped, and one of the third and fourth lenses is convex shaped and another one of the third and fourth lenses is concave shaped.

17. The miniature image capture lens as claimed in claim 16, wherein the first lens and the second lens are formed of different materials, and the third lens and the fourth lens are formed of different materials.

18. The miniature image capture lens as claimed in claim 16, wherein the miniature image capture lens reduces optical dispersion according to the first, second, third, and fourth lenses at the specific condition.

19. The miniature image capture lens as claimed in claim 16, wherein each of the first and second lenses has aspect ration less than the third and fourth lenses.

20. The miniature image capture lens as claimed in claim 16, further comprising an IR cut filter coated on the first lens of the first lens group.