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Zoom lens

A zoom lens and zoom lens technology, applied in the field of zoom lenses, can solve the problems of high lens manufacturing cost and difficulty in reducing costs, and achieve the effects of reducing the total length of the lens, improving transmission, and good focus and zoom

Pending Publication Date: 2021-08-13
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 manufacturing cost of this type of lens is generally high, and it is difficult to achieve low cost

Method used

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Embodiment Construction

[0045] 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.

[0046] 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 compensation lens group (G1) having a negative refractive power, a stop (STO), and a zoom lens group (G2) having a positive refractive power arranged in order along an optical axis from an object side to an image side, the compensation lens group (G1) comprising a first lens (L1), a second lens (L2), and a third lens (L3) along the optical axis from the object side to the image side, the zoom lens group (G2) comprises fourth optical elements (B4, L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7) and an eighth lens (L8), and the eighth lens (L8) is a convex-concave lens. According to the zoom lens, infrared confocal, athermalization and ultralow cost can be 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 zoom lens has the characteristic of variable focal length, which can meet the needs of various monitoring scenarios, so it has attracted wide attention in the field of security monitoring. With the increase in the application scenarios of zoom lenses and the increasing demand of the market, higher requirements are put forward for the resolution, aperture, infrared performance and high and low temperature performance of zoom lenses used in the field of security monitoring. However, the zoom lenses in the prior art often cannot take into account the above-mentioned characteristics, and the usage scenarios are also limited due to the existence of performance defects. It can be seen that the optical zoom system with the characteristics of high resolution, infrared confocal and no false focus under high and low temperature condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B15/177G02B13/14G02B13/18
CPCG02B15/1425G02B15/177G02B13/008G02B13/0045G02B13/006G02B13/009
Inventor 赖景辉沈悦蓝岚桂勋
Owner 舜宇光学(中山)有限公司
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