Zoom lens

A zoom lens and zoom lens technology, applied in the field of zoom lens, can solve the problems of unmentioned, low resolution, heavy weight, etc., and achieve the effects of low cost, large zoom magnification, and low cost

Pending Publication Date: 2021-10-22
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

Although this solution solves the problems of large volume and low resolution of the zoom optical system, all use glass spherical lenses, which makes the zoom optical system high in cost and heavy in weight
In addition, there is no mention of the performance that can satisfy both infrared confocal and high and low temperature image distortion

Method used

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Examples

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Embodiment Construction

[0062] 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.

[0063] 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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PUM

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Abstract

The invention relates to a zoom lens, which comprises a first fixed lens group with positive focal power, a zoom lens group with negative focal power, an aperture diaphragm, a second fixed lens group with positive focal power, a focusing lens group with positive focal power and a third fixed lens group which are sequentially arranged from an object side to an image side along an optical axis, wherein the zoom lens group and the focusing lens group can move along the optical axis direction. The zoom lens is characterized in that the focal power of the third fixed lens group is negative. The zoom lens provided by the invention realizes small volume, large aperture, day and night confocal, and no virtual focus in high and low temperature environments, and realizes full-focus 4K high-resolution imaging. The plastic aspheric lens is adopted, so that the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a zoom lens. Background technique [0002] The high-end market in the security industry has higher and higher requirements for picture clarity, and 4K resolution has gradually become the mainstream. The telephoto resolution of existing high-magnification zoom lenses is mostly at the level of 2M and 4M, which can no longer meet the needs of the market. Since there is a mutual restriction between the zoom ratio of the zoom lens and the front diameter and overall length of the lens, it is difficult to achieve miniaturization. If the zoom lens adopts a large aperture, although it can ensure that enough light is captured in dark fields and at night, it often brings obvious aberrations and the impact of unclear imaging. In addition, the security field generally requires camera lenses to have infrared confocal performance and image distortion characteristics under high and low...

Claims

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Application Information

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IPC IPC(8): G02B15/14G02B15/16
CPCG02B15/145113G02B15/16
Inventor 聂路鑫黄慧梁伟朝
Owner 舜宇光学(中山)有限公司
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