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Imaging lens

A lens and lens technology, applied in the field of imaging lenses, can solve the problems of difficult to meet the requirements of light, thin, short and small electronic products, increasing the optical effective diameter of the lens in the imaging lens, and small volume.

Inactive Publication Date: 2012-07-18
NANTONG HENGXIN PRECISION MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the imaging effect of the imaging device, lowering the aperture value is usually used to improve the light transmission performance of the imaging lens, and reducing the aperture value will make the entrance pupil aperture of the imaging lens larger, which will also increase the optical effectiveness of the lens inside the imaging lens. diameter, so that the optical imaging device cannot have a smaller volume or lower cost, and it is difficult to meet the requirements of light, thin and short electronic products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] The imaging lens 100 of Embodiment 1 satisfies the conditions listed in Table 1, and the aperture value is 2.0, and the total length of the imaging lens 100 is 2.4 mm.

[0053] Table 1

[0054] optical surface

R(mm)

D(mm)

Nd

Vd

S1

0.830814

0.351481

1.54347

56.8

S2

3.444337

0.020895

aperture

gigantic

0.360539

S3

-0.58098

0.333402

1.54347

56.8

[0055] S4

-0.42483

0.03

S5

2.04682

0.3

1.531131

55.7539

S6

0.773161

0.093683

imaging surface

gigantic

[0056] The aspheric coefficients of the lens are listed as follows:

[0057] Table 2

[0058] optical surface

K

A

B

C

D

S1

-0.2726

-0.1401

3.398219

-27.1252

101.1295

S2

-34.8213

...

Embodiment approach 2

[0064] The imaging lens 100 of Embodiment 2 satisfies the conditions listed in Table 3, the aperture value is 2.0, and the total length of the imaging lens 100 is 2.5 mm.

[0065] table 3

[0066] optical surface

[0067] The aspheric coefficients of the lens are listed as follows:

[0068] Table 4

[0069] optical surface

[0070] S5

[0071] The spherical aberration characteristic curve, the field curvature characteristic curve and the distortion characteristic curve of the imaging lens 100 of the second embodiment are respectively as follows Figure 5 , Image 6 and Figure 7 shown. Figure 5 Among them, the spherical aberration caused by visible light is controlled between -0.05mm and 0.05mm. Image 6 Among them, the value of meridian field curvature and sagittal field curvature is controlled between -0.10mm and 0.10mm. Figure 7 Among them, the amount of distortion is controlled between -2% and 2%. It can be seen that the aberration,...

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Abstract

The invention provides an imaging lens, which sequentially comprises a first lens with positive focal power, a second lens with positive focal power and a third lens with negative focal power from an object side to an image side. The imaging lens meets the following conditional expression that: S1 / D1 is more than 2.4 and less than 3.0, and R1 / F is more than 0.3 and less than 0.7, wherein S1 is the effective diameter of the object side of the first lens, D1 is the distance from the object side of the first lens to the image side along an optical axis, R1 is the curvature radius of the object side of the first lens, and F is the focal length of the imaging lens. The aperture value of the whole imaging lens is limited through a specific value between the S1 and the D1, and the volume of the whole imaging lens is limited through a specific value between the R1 and the F.

Description

technical field [0001] The invention relates to imaging technology, in particular to an imaging lens. Background technique [0002] With the continuous development of science and technology, electronic products are constantly developing towards the direction of thin, light, small and multi-functional, and in electronic products, such as digital cameras, computers, etc., besides imaging devices, even mobile phones or personal digital assistants (PDAs) ) and other devices are also required to add an imaging device; and in order to be convenient to carry and meet the needs of humanization, the imaging device not only needs to have good imaging quality, but also needs a lower cost to effectively improve the imaging device. applicability. [0003] In order to improve the imaging effect of the imaging device, lowering the aperture value is usually used to improve the light transmission performance of the imaging lens, and reducing the aperture value will make the entrance pupil a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18G02B1/04
CPCG02B13/0035
Inventor 尹淳义黄俊翔
Owner NANTONG HENGXIN PRECISION MASCH CO LTD
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