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Optical imaging lens

An optical imaging lens and lens technology, applied in optics, optical components, instruments, etc., can solve problems such as damage to the imaging quality of the lens, balance vertical chromatic aberration and lateral chromatic aberration, avoid excessive concentration, and improve the effect.

Pending Publication Date: 2022-07-12
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional optical lens with better imaging quality usually has a larger structural size, and the reduction of the structural size of the optical lens by conventional means is usually at the expense of the imaging quality of the lens.

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0061] figure 1 It is a schematic diagram of the lens group structure of Embodiment 1 of the optical imaging lens of the present invention. The optical imaging lens sequentially includes from the object side to the image side along the optical axis: aperture STO, first lens E1, second lens E2, third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0062] The first lens E1 has positive refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is convex, and the image s...

Embodiment 1

[0070] The optical imaging lens in Embodiment 1 satisfies:

[0071] TTL / ImgH=1.15, where TTL is the on-axis distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0072] f×tan(1 / 2FOV)=5.23mm, where f is the effective focal length of the optical imaging lens, and FOV is the maximum field of view of the optical imaging lens;

[0073] f / EPD=1.74, where f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens;

[0074] f6 / (R11+R12)=1.37, where f6 is the effective focal length of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, and R11 is the radius of curvature of the object side of the sixth lens;

[0075] f4 / f1=2.55, where f4 is the effective focal length of the fourth lens, and f1 is the effective focal length of the first lens;

[0076] (f3+f7) / (f3-f7)=1.28, whe...

specific Embodiment 2

[0092] image 3 It is a schematic diagram of the lens group structure of the second embodiment of the optical imaging lens of the present invention. The optical imaging lens sequentially includes from the object side to the image side along the optical axis: aperture STO, first lens E1, second lens E2, third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8 and the imaging surface S17.

[0093] The first lens E1 has positive refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is convex, and th...

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Abstract

The invention discloses an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power; wherein the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f / EPDlt; 1.9); the effective focal length f6 of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens and the curvature radius R11 of the object side surface of the sixth lens satisfy 0.7 lt; f6 / (R11 + R12) lt; and 1.5. According to the optical imaging lens, the overall large aperture effect can be improved, field curvature and chromatic aberration can be avoided, and meanwhile the problems of astigmatism and the like are not prone to occurring.

Description

[0001] This application is a divisional application of an application with an application number of 202110017743.X, an application date of January 7, 2021, and an invention title of "An Optical Imaging Lens". technical field [0002] The invention belongs to the field of optical imaging, in particular to an optical imaging lens comprising seven lenses. Background technique [0003] With the increasing demand for camera phones, the quality of mobile phone lenses has become an important measure of the quality of mobile phones. Recently, the trend of ultra-thin mobile phones has become more and more obvious with the market demand and the continuous upgrading of module technology, among which the requirements for the imaging quality of mobile phone lenses are getting higher and higher, with extremely high mobile phone pixels and first-class images. Processing has become a must-have for a good phone. From the perspective of our mobile phone lenses, it can be said that having hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B9/64
Inventor 耿晓婷周进谢丽戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD