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Zoom lens

A zoom lens and lens group technology, applied in the field of zoom lenses, can solve problems such as poor imaging quality, reduce astigmatism and distortion, improve imaging quality, and achieve good imaging quality.

Pending Publication Date: 2021-02-26
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 a zoom lens to solve the problem of poor imaging quality in zoom lenses in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0066] Such as Figure 1 to Figure 48 As shown, the zoom lens sequentially includes a first lens group G1, a second lens group G2 and a third lens group G3 along the optical axis of the zoom lens from the object side to the image side, and a plurality of lenses in the first lens group G1 are arranged at intervals; The second lens group G2 has a positive refractive power, and a plurality of lenses in the second lens group G2 are arranged at intervals; the third lens group G3 has a negative refractive power, and a plurality of lenses in the third lens group G3 are arranged at intervals, and the second lens The group G2 and the third lens group G3 move along the optical axis to realize continuous zooming. The zoom lens has a wide-angle end position, an intermediate end position, and a telephoto end position; wherein, the entrance pupil diameter EPD of the zoom lens, and the effective pixels on the imaging surface of the zoom lens The half ImgH of the diagonal length of the area a...

Embodiment 2

[0083] The zoom lens includes a first lens group G1, a second lens group G2, and a third lens group G3 in order from the object side to the image side along the optical axis of the zoom lens, and a plurality of lenses in the first lens group G1 are arranged at intervals; the second lens The group G2 has a positive refractive power, and the plurality of lenses in the second lens group G2 are arranged at intervals; the third lens group G3 has a negative refractive power, and the plurality of lenses in the third lens group G3 are arranged at intervals, and the second lens group G2 and The third lens group G3 moves along the optical axis to realize continuous zooming. The zoom lens has a wide-angle end position, an intermediate end position, and a telephoto end position; wherein, the effective focal length fG3 of the third lens group and the third lens group are from the wide-angle end position to the telephoto end position. The position of the focal end satisfies: -2.0<fG3 / |△T3|≤-...

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Abstract

The invention provides a zoom lens. The zoom lens sequentially comprises the following lens groups from the object side to the image side along the optical axis of the zoom lens: a first lens group, wherein a plurality of lenses in the first lens group are arranged at intervals; a second lens group which has positive focal power, wherein a plurality of lenses in the second lens group are arrangedat intervals; a third lens group which has negative focal power, wherein a plurality of lenses in the third lens group are arranged at intervals, the second lens group and the third lens group move along the optical axis to realize continuous zooming, and the zoom lens has a wide-angle end position, a middle end position and a long-focus end position; wherein the entrance pupil diameter (EPD) of the zoom lens, half ImgH of the diagonal length of an effective pixel area on the imaging surface of the zoom lens and the maximum value DTmax in the effective radiuses of the lenses in the first lensgroup, the second lens group and the third lens group meet the following formula: EPD * ImgH / DTmax > 6.5 mm. The zoom lens solves the problem that a zoom lens in the prior art is poor in imaging quality.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to a zoom lens. Background technique [0002] With the continuous development of smart phones, the camera module of new mobile phones has become one of the main highlights every year, so the development of camera modules has become the top priority of major mobile phone manufacturers. Super wide-angle, telephoto, large aperture, large image area, etc. have gradually become the standard equipment for taking pictures on mobile phones. The zoom lens realizes the change of focal length by moving the distance between the lens groups of the lens. Not mature application yet. Compared with digital zoom, optical zoom can support the imaging of the main body of the image, adding more pixels to make the main body bigger and clearer, and the resolution and image quality will not change, while digital zoom obtains the magnification effect by cutting the chip. The imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/167G02B15/14
CPCG02B15/167G02B15/143
Inventor 唐梦娜闻人建科戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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