Zoom lens

A zoom lens and zoom lens technology, applied in the field of zoom lens, can solve the problems that the structure needs to be improved and cannot meet the application requirements, etc., and achieve the effect of day and night confocal, good assembly, and small size

Pending Publication Date: 2021-12-17
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned zoom lens cannot meet the application requirements of a higher zoom ratio, and the design of the structure needs to be improved.

Method used

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Examples

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Embodiment Construction

[0056] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0057] When describing the embodiments of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inner" and "outer" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particu...

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Abstract

The invention relates to a zoom lens comprising a first fixed lens group (G1) having a positive refractive power, a first zoom lens group (G2) having a negative refractive power, an aperture stop (STO), a second fixed lens group (G3) having a positive refractive power, a second zoom lens group (G4) having a positive refractive power, and a focus lens group (G5) arranged in order from an object side to an image side along an optical axis. The refractive power of the focus lens group (G5) is positive; the first zoom lens group (G2), the second zoom lens group (G4), and the focus lens group (G5) are movable in the direction of the optical axis. A 'positive-negative-positive-positive-positive' five-group architecture and a 'two-zoom and one-focus' three-group linkage mode are adopted, the realized zoom ratio exceeds 30 times, the maximum aperture can reach F1.4, the large zoom ratio, the small size and the large aperture are compatible, day and night infrared confocal of a 1X-20X focal length section is ensured, and full-focal length section 4K imaging is realized.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a zoom lens. Background technique [0002] The resolution of the existing high-magnification zoom lens at the telephoto end is mostly at the 2M level, and the large-magnification zoom lens has a large amount of infrared defocus, which cannot achieve day and night confocal, and it is difficult to meet the work requirements of complex application scenarios. In addition, the magnification ratio of the zoom lens has a mutually restrictive relationship with the front port diameter and overall length of the lens, making it difficult to achieve miniaturization. [0003] Chinese patent CN112068294A discloses a zoom lens. Along the direction from the object side to the image side, the lens sequentially includes a first fixed lens group, a first zoom lens group, an aperture stop, a second fixed lens group, a second zoom lens group, a focus lens group, and a second lens group. Thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B15/16
CPCG02B15/145129G02B15/16
Inventor 白兴安陈汇东
Owner 舜宇光学(中山)有限公司
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