Optical imaging camera lens

A technology of optical imaging lens and optical imaging system, which is applied in the direction of optics, optical components, instruments, etc., can solve the problems of large main ray exit angle, increased distortion, and long lens size, so as to improve imaging quality and reduce deflection angle , the effect of large field of view

Pending Publication Date: 2021-05-14
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common camera lenses, in order to meet the high pixel and large field of view, need to adopt a large aperture configuration, resulting in a relatively long lens size, so it will be difficult to meet the requirements of a high pixel photosensitive chip
In addition, in order to further increase the field of view, it often leads to increased distortion and too large a main ray exit angle, which makes the resolution of the lens insufficient.

Method used

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  • Optical imaging camera lens
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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0063] 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 includes in sequence from the object side to the image side along the optical axis: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the filter E6 and the imaging surface S13.

[0064] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is convex. The second lens E2 has negative refractive power, its object side S3 is concave, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has negative refractive power, its object side S9 is convex, and its image side S10 is concave. The filter...

Embodiment 1

[0072] The optical imaging lens in embodiment 1 satisfies:

[0073] Semi-FOV=47.92°, wherein, Semi-FOV is half of the maximum field of view angle of the optical imaging system;

[0074] f1 / f4=1.47, wherein, f1 is the effective focal length of the first lens, and f4 is the effective focal length of the fourth lens;

[0075] f1 / fno=1.31, wherein, f1 is the effective focal length of the first lens, and fno is the relative F number of the lens;

[0076] TTL / ImgH=1.33, wherein, 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;

[0077] |R2 / f|=1.33, wherein, R2 is the radius of curvature of the image side of the first lens, and f is the effective focal length of the optical imaging system;

[0078] (DT11+DT21) / TD=0.47, where DT11 is the maximum effective radius of the object side of the first lens, DT21 is the maximum effective radius of the object s...

specific Embodiment 2

[0094] image 3 It is a schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention. The optical imaging lens includes in sequence from the object side to the image side along the optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the filter E6 and the imaging surface S13.

[0095] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has negative refractive power, its object side S9 is convex, and its image side S10 is concave. The filter E6 h...

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Abstract

The invention discloses an optical imaging camera lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis; the second lens has focal power; the third lens has positive focal power; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fifth lens is a convex surface; the half Semi-FOV of the maximum field angle of the optical imaging system meets the condition that: Semi-FOV is greater than or equal to 45 degrees; the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy the relational expression that 1.2<f1 / f4<2.2; the effective focal length f1 of the first lens and the relative F number fno of the camera lens satisfy the relational expression that 0<f1 / fnolt<2.4; the on-axis distance TTL from the object side surface of the first lens to the imaging surface and half ImgH of the diagonal length of an effective pixel area on the imaging surface meet the relational expression that TTL / ImgHl<1.4. The optical imaging camera lens has the advantages of being small in distortion, large enough in field angle, ultrathin and the like.

Description

technical field [0001] The invention belongs to the field of optical imaging, in particular to an optical imaging lens comprising five lenses. Background technique [0002] With the improvement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and the pixels can reach a smaller size. Therefore, optical lenses with high imaging quality have become an indispensable part, which has led to the gradual rise of portable electronic products. , especially portable electronic products with camera functions are more favored by people. The photosensitive element of a general optical system is nothing more than a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). With the improvement of semiconductor process technology, the photosensitive element Correspondingly, the size of the camera lens of the optical system needs to be smaller and smaller to facilitate miniaturization. In addition, the imagi...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 王金超吴旭炯戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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