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Miniature imaging lens

An imaging lens and miniature technology, which is applied in optics, instruments, optical components, etc., can solve the problems that cannot meet the needs of large aperture and large field of view

Active Publication Date: 2014-07-23
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this system meets the requirements of miniaturization and effectively improves the imaging quality, the structure cannot meet the requirements of large aperture and large field of view

Method used

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Embodiment Construction

[0064] The invention provides a micro-imaging lens, which comprises sequentially from the object side to the image side: a first lens with positive refractive power; a second lens with positive refractive power, the side of the object plane is concave, and the side of the image plane is convex; a third lens with negative power, the object plane side of which is a convex meniscus, and the image plane side of the third lens has at least one inflection point; and at least one surface of said lens is aspherical, in A diaphragm is provided between the subject and the first lens.

[0065] Wherein, the miniature imaging lens satisfies the following relationship:

[0066] 25

[0067] Wherein, above-mentioned V2 is the dispersion coefficient of the second lens, V3 is the dispersion coefficient of the third lens; ImgH is the maximum image height on the imaging plane of the lens; TTL is the object side of the first lens to its...

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Abstract

The invention provides a miniature imaging lens. The miniature imaging lens is characterized by comprising three lens bodies, wherein the first lens body is a positive focal power lens body; the second lens body is a positive focal power lens body with a concave object surface side and a convex image surface side; the third lens body is a negative focal power crescent lens body with a convex object surface side, and the image surface side of the third lens body is provided with at least one inflection point. The miniature imaging lens meets the inequations: 25<V2-V3<45, 1.5<f1 / f2<2.5 and 0.55<ImgH / TTL<0.75. According to the miniature imaging lens, the three aspheric lens bodies are adopted, the system length of the lens is effectively reduced, compatibility between field angles and image quality is fully considered, and excellent imaging quality of the lens on the condition of great visual angles is guaranteed; in addition, the miniature imaging lens is low in tolerance sensitivity through reasonable focal power distribution, ensures mass production of products and achieves a good technical effect.

Description

technical field [0001] The invention relates to a lens of an imaging optical system of a portable small electronic product, in particular to a miniature imaging lens. Background technique [0002] With the increasingly higher requirements for the portability of optical lenses, the field of digital imaging is constantly innovating and changing. At present, image carriers such as mobile phones, cameras, and notebooks are developing towards miniaturization. The lenses used for such products require miniaturization. , large viewing angle, large aperture, and good optical performance. At present, a general camera lens with a three-piece structure usually adopts a material combination in which the second lens and the third lens are F series and K series or both the second lens and the third lens are K series. The second lens is F series, and the third lens is K series material combination, which will increase the distance between the second lens and the third lens, which is not c...

Claims

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Application Information

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IPC IPC(8): G02B13/18G02B13/06G02B13/00G02B1/04
Inventor 卢建龙黄林戴付建
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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