Zoom lens

A zoom lens and lens technology, applied in the field of zoom lenses, can solve the problems of difficulty in miniaturization and unstable lens image quality, and achieve the effect of reducing astigmatism and distortion and improving image quality.

Pending Publication Date: 2020-11-13
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 problems of unstable image quality and difficulty in miniaturization of lenses in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0061] Such as Figure 1 to Figure 60 As shown, the zoom lens along the optical axis 10 of the zoom lens includes the first lens group G1, the second lens group G2 with positive refractive power, the third lens group G3 with positive refractive power, and the fourth lens group G3 from the object side to the image side along the optical axis 10 of the zoom lens. Lens group G4, the second lens group G2 is spaced from the first lens group G1 and forms a first air gap, the second lens group G2 can move on the optical axis 10; the third lens group G3 is spaced from the second lens group G2 And form a second air gap, the third lens group G3 can move on the optical axis 10; the fourth lens group G4 and the third lens group G3 are spaced apart and form a third air gap; wherein, the total optical length of the zoom lens TTL, The difference △f between the effective focal length of the zoom lens at the wide-angle end and the effective focal length of the zoom lens at the telephoto end △f...

Embodiment 2

[0077] The present invention provides a zoom lens, which sequentially includes a first lens group G1, a second lens group G2 with positive refractive power, and a third lens group with positive refractive power along the optical axis 10 of the zoom lens from the object side to the image side G3 and the fourth lens group G4, the second lens group G2 is spaced apart from the first lens group G1 and forms a first air gap, the second lens group G2 can move on the optical axis 10; the third lens group G3 and the second lens group The group G2 is arranged at intervals and forms a second air gap, and the third lens group G3 can move on the optical axis 10; the fourth lens group G4 is arranged at intervals with the third lens group G3 and forms a third air gap; wherein, the zoom lens is at a wide angle The effective focal length fw at the telephoto end and the effective focal length ft at the telephoto end of the zoom lens satisfy: 1.5

[0078] Through the reasonable arrang...

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PUM

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Abstract

The invention provides a zoom lens. The zoom lens sequentially comprises a first lens group, a second lens group, a third lens group and a fourth lens group from an object side to an image side; the second lens group has positive focal power, the second lens group and the first lens group are arranged at an interval to form a first air space, and the second lens group can move on the optical axis;the third lens group has positive focal power, the third lens group and the second lens group are arranged at an interval and form a second air interval, and the third lens group can move on the optical axis; the fourth lens group and the third lens group are arranged at an interval and form a third air interval; the total optical length TTL of the zoom lens, and the difference value delta f between the effective focal length of the zoom lens at the wide-angle end and the effective focal length of the zoom lens at the telephoto end meet the condition that TTL / | delta f | is larger than 2.5 and smaller than 4.0. According to the invention, the problems of unstable image quality and difficulty in realizing miniaturization of the lens in the prior art are solved.

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 improvement of the lens manufacturing level, the current cameras have more comprehensive and wider application functions. Among them, the zoom lens can change the focal length within a certain range to obtain different wide and narrow field of view angles, images of different sizes and different scene ranges. The zoom solution of the existing mobile phone is realized by switching multiple lenses with fixed focal lengths. The zoom between these fixed focal lengths is completed by algorithm difference, resulting in a large loss of image quality of the lens during zooming, which can no longer meet people's demand for high-quality images. Pursue. [0003] That is to say, the lens in the prior art has the problems of unstable image quality and difficulty in miniaturization. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): G02B15/163
CPCG02B15/163G02B13/009G02B15/144107G02B15/144507G02B15/144515G02B15/144G02B5/005G02B5/20G02B13/004G02B13/0055
Inventor 张骞胡亚斌戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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