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Zoom lens

A technology of zoom lens and zoom lens, which is applied in the field of zoom lens, can solve problems such as unclear picture and insufficient shooting brightness, and achieve the effects of wide range of field of view, excellent comprehensive performance, and large aperture

Pending Publication Date: 2021-04-16
UNION OPTECH
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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, which aims to improve the technical problems of insufficient shooting brightness and unclear picture in the prior art

Method used

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0033] It should be noted that if there are directional indications involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes , then the directional indication changes accordingly.

[0034] In addition, if there are descriptions involving "first", "second" and so on i...

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Abstract

The invention discloses a zoom lens provided with an object side and an image side which are oppositely arranged in the optical axis direction, the zoom lens comprises a compensation lens group with negative focal power and a zoom lens group with positive focal power which are sequentially arranged from the object side to the image side, and the zoom lens group is arranged close to and far away from the compensation lens group in the optical axis direction, so that the distance between the zoom lens group and the compensation lens group can be adjusted. The compensation lens group comprises a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power which are sequentially arranged from the object side to the image side. The zoom lens group comprises a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power which are sequentially arranged from the object side to the image side. The ultra-wide-angle ultra-high-definition zoom lens is large in aperture, high in performance and small in size.

Description

technical field [0001] The invention relates to the technical field of optical system design, in particular to a zoom lens. Background technique [0002] Due to the fixed field of view of the fixed-focus lens, the fixed-focus lens cannot meet the use requirements in many scenarios. Due to the continuously variable field of view and focal length within a certain range, the zoom lens can adapt to a variety of application scenarios, so it has received great attention and application in the security field. Wide-angle zoom lens is a commonly used lens type in security monitoring systems. At present, mainstream wide-angle zoom lenses usually use more than 5 glass lenses, and the cost is high and it is difficult to popularize in large quantities. [0003] At present, there are various small zoom lenses on the market that are used in security systems. However, due to the use of glass spherical surface design, it is difficult for the lens to meet the market demand in terms of pixel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B15/14
Inventor 白万涛李守林李建华王晓王浩吕祖文邱盛平龚俊强
Owner UNION OPTECH
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