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Optical imaging lens

An optical imaging lens and imaging surface technology, applied in optics, optical components, instruments, etc., can solve the problems of small head and large aperture difficult to balance

Active Publication Date: 2021-12-07
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem that the optical imaging lens in the prior art has a small head and a large aperture that is difficult to balance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0069] Such as Figure 1 to Figure 25 As shown, the optical imaging lens includes a first lens, a second lens, a third lens and a fourth lens in sequence along the object side to the image side, the first lens has a negative power; the object side of the second lens is convex, and the second lens The image side of the lens is a convex surface; the fourth lens has negative refractive power; wherein, the maximum effective radius DT11 of the object side of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: DT11 / ImgH <0.4; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<2.

[0070] Preferably, 0.3

[0071] Preferably, f / EPD=1.84.

[0072] By rationally allocating the focal power and surface shape of each lens, it is beneficial to increase the field of view, and at the same time, it is also beneficial to compress t...

Embodiment 2

[0094] Such as Figure 1 to Figure 25 As shown, the optical imaging lens includes a first lens, a second lens, a third lens and a fourth lens in sequence along the object side to the image side, the first lens has a negative power; the object side of the second lens is convex, and the second lens The image side of the lens is a convex surface; the fourth lens has negative refractive power; wherein, the maximum effective radius DT11 of the object side of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: DT11 / ImgH <0.4; Half ImgH of the diagonal length of the effective pixel area on the imaging surface, the axial distance SL from the diaphragm to the imaging surface, and the aperture value fno of the optical imaging lens satisfy: 0.9<ImgH*fno / SL<1.1.

[0095] Preferably, 0.3

[0096] Preferably, 0.9

[0097] By rationally allocating the focal power and surface shape of each lens, ...

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Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side, wherein the first lens has negative focal power; the object-side surface of the second lens is a convex surface, and the image-side surface of the second lens is a convex surface; the fourth lens has negative focal power; the maximum effective radius DT11 of the object-side surface of the first lens and the half ImgH of the diagonal length of an effective pixel area on the imaging surface meet the following condition: DT11 / ImgH is less than 0.4; and the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following condition: f / EPD is less than 2. The optical imaging lens solves the problem that a small head and a large aperture of an optical imaging lens in the prior art are difficult to consider at the same time.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. Background technique [0002] With the continuous development of science and technology, people have higher and higher requirements for mobile phone lenses, not only clear and large image area, but also due to the continuous promotion of full-screen mobile phones, the lens design of the small head is easy to hide, easy to carry and more Beautiful and beautiful; in line with the development of the industry, the demand for lenses with small heads is also increasing. At the same time, the large-aperture lens can obtain a relatively simple background in a relatively cluttered environment, so that the subject is more prominent; and it has a higher amount of incoming light, thereby ensuring image quality. At present, some optical imaging lenses with small heads have small apertures and a small amount of light, which is difficult to me...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/004G02B13/06G02B13/18
Inventor 徐鑫垚吕赛锋李林阳戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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