Zoom lens

A zoom lens and zoom lens technology, applied in the field of zoom lenses, can solve the problems of not being able to take into account infrared imaging, fail to meet work requirements, and large lens aperture, so as to achieve resolution effects, large magnification, small volume, and large aperture. Effect

Pending Publication Date: 2022-02-25
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

In the prior art, the resolution of the large-aperture zoom lens at the telephoto end is mostly at a low 2M level, and it cannot take into account infrared imaging, so it cannot meet the increasingly complex work requirements
In addition, the front lens diameter of the existing lens is relatively large, and it is difficult to achieve a large aperture while meeting the miniaturization requirements

Method used

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Examples

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Embodiment Construction

[0039] 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.

[0040] 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 present invention relates to a zoom lens comprising a first fixed lens group (G1) having a positive refractive power, a zoom lens group (G2) having a negative refractive power, a stop (STO), a second fixed lens group (G3) having a positive refractive power, and a focus lens group (G4) having a positive refractive power, which are arranged in order from an object side to an image side along an optical axis, and the zoom lens also includes a third fixed lens group (G5) is positioned on the image side of the focusing lens group (G4) and has positive focal power. The zoom of the zoom lens can exceed 3 times, the maximum aperture can reach F1.1, the large aperture can be realized under the condition of small volume, and confocal within the focal length of 1X-3X is ensured while infrared confocal imaging is performed, and the resolution of the full focal length meets 4K.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, in particular to a zoom lens. Background technique [0002] With the rapid development of the field of security technology, the requirements for the definition of surveillance video images are getting higher and higher, which also makes high-resolution cameras gradually occupy the market. In the prior art, the resolution of the large-aperture zoom lens at the telephoto end is mostly at a low 2M level, and it cannot take into account infrared imaging, so it cannot meet the increasingly complex work requirements. In addition, the front lens diameter of the existing lens is relatively large, and it is difficult to achieve a large aperture while meeting the miniaturization requirement. Contents of the invention [0003] The object of the present invention is to provide a zoom lens. [0004] To achieve the above object, the present invention provides a zoom lens, comprising a first fixed l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14
CPCG02B15/145129
Inventor 白兴安田晓宁罗钧乐
Owner 舜宇光学(中山)有限公司
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