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Small-head large-aperture pick-up lens

A camera lens and aperture technology, which is applied in the field of optical systems, can solve problems such as lens performance degradation and impact on lens shooting quality, and achieve the effects of small aperture coefficient, reduced head size, and increased screen-to-body ratio

Pending Publication Date: 2020-10-09
辽宁中蓝光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the larger screen-to-body ratio, the camera lens usually sacrifices a certain lens aperture to meet the requirements of a small head. In the design of the optical system, the common practice is to achieve a smaller head by changing the thickness of the first lens. The size of the body, although a larger aperture can be maintained, but the performance of the lens still has a certain decline, which affects the shooting quality of the lens

Method used

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  • Small-head large-aperture pick-up lens
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  • Small-head large-aperture pick-up lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the small-head and large-aperture camera lens includes sequentially from the object side to the image side along the optical axis: a first lens P1 with positive refractive power, a second lens P2 with negative refractive power, and a first lens P2 with positive refractive power. Three lenses P3, a fourth lens P4 with negative refractive power, a fifth lens P5 with positive refractive power, and a sixth lens P6 with negative refractive power. The diaphragm STOP is set on the object side of the first lens P1, and the incident light passes through the diaphragm Stop, each lens and the filter IR-CUT in sequence, and is finally imaged on the imaging plane IMA. Wherein, the object side and image side of the first lens are both convex surfaces, the second lens object side is convex, and the image side is concave, the object side of the third lens is convex, and the image side is concave, and the object side and image side of the fourth lens are both ...

Embodiment 2

[0083] Such as image 3 As shown, the small-head and large-aperture camera lens includes sequentially from the object side to the image side along the optical axis: a first lens P1 with positive refractive power, a second lens P2 with negative refractive power, and a first lens P2 with positive refractive power. Three lenses P3, a fourth lens P4 with negative refractive power, a fifth lens P5 with positive refractive power, and a sixth lens P6 with negative refractive power. The stop STOP is set on the object side of the first lens P1, and the incident light passes through the stop STOP, each lens and the filter IR-CUT in sequence, and is finally imaged on the imaging plane IMA. Wherein, the object side of the first lens is convex, the image side is concave, the object side of the second lens is convex, the image side is concave, the object side of the third lens is convex, and the image side is concave, and the object side and image side of the fourth lens are Both are conca...

Embodiment 3

[0098] Such as Figure 5 As shown, the small-head and large-aperture camera lens includes sequentially from the object side to the image side along the optical axis: a first lens P1 with positive refractive power, a second lens P2 with negative refractive power, and a first lens P2 with positive refractive power. Three lenses P3, a fourth lens P4 with negative refractive power, a fifth lens P5 with positive refractive power, and a sixth lens P6 with negative refractive power. The stop STOP is set on the object side of the first lens P1, and the incident light passes through the stop STOP, each lens and the filter IR-CUT in sequence, and is finally imaged on the imaging plane IMA. Wherein, the object side of the first lens is convex, the image side is concave, the object side of the second lens is convex, the image side is concave, the object side of the third lens is convex, and the image side is concave, and the object side and image side of the fourth lens are Both are conc...

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Abstract

The invention relates to a small-head large-aperture pick-up lens. The lens is technically characterized by sequentially comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a diaphragm from an object side to an image side along an optical axis, wherein the first lens has positive refraction power, and the object-side surface of the first lens is a convex surface; the second lens, the third lens and the fourth lens all have refractive power; the fifth lens has positive refractive power, the paraxial position of the image-side surface of the fifthlens is a plane, and at least one convex surface exists at an off-axis position of the fifth lens; the sixth lens has negative refractive power, and the image-side surface of the sixth lens is concavesurface; the object-side surface and the image-side surface of each lens are aspheric surfaces; and the diaphragm is disposed on the object side of the first lens. According to the lens, the head size of the lens is small, the screen-to-body ratio of a mobile phone is improved, the performance of the lens is not reduced, resolution is high, and the lens has a large aperture and can meet the requirement of a user for shooting clearer images.

Description

technical field [0001] The invention relates to an optical system, in particular to a camera lens with a small head and a large aperture, which is suitable for photographing devices such as mobile phones that require a high screen-to-body ratio and high resolution. Background technique [0002] At present, mobile phones are gradually developing in the direction of high performance and high appearance. With the emergence of folding screens, people gradually begin to demand a larger screen-to-body ratio. In order to meet the larger screen-to-body ratio, the camera lens usually sacrifices a certain lens aperture to meet the requirements of a small head. In the design of the optical system, the common practice is to achieve a smaller head by changing the thickness of the first lens. Although the aperture can be kept relatively large, the performance of the lens will still decline to a certain extent, which will affect the shooting quality of the lens. Contents of the invention...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0015G02B13/0045
Inventor 王哲金兑映杨利全
Owner 辽宁中蓝光电科技有限公司
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