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Zoom lens

A zoom lens and lens technology, applied in the field of zoom lens, can solve the problem of not being able to take into account high magnification

Active Publication Date: 2012-12-12
ABILITY ENTERPRISE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a lens module with a low number of lens groups may not be able to meet the requirements of high magnification

Method used

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Examples

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Embodiment Construction

[0034] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the zoom lens proposed according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. The description is as follows.

[0035] In order to achieve the requirements of lightness, low cost, high magnification, and high imaging quality, an embodiment of the present invention provides a zoom lens, which sequentially includes a first lens group with negative diopter and a lens group with A second lens group with positive diopter, and a third lens group with positive diopter. Each lens group includes at least one lens, and the first lens group and the second lens group move relatively on an optical axis to determine a magnification of the zoom lens.

[0036] In addition, the second lens group includes a...

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Abstract

The invention relates to a zoom lens which comprises a first lens group, a second lens group and a third lens group from an object side to an image side, wherein the first lens group has a negative diopter, the second lens group has a positive diopter, and the third lens group has positive diopter. The second lens group comprises a plurality of lenses, wherein the refractive index of a lens closest to the image side is NDi, the refractive index of a lens closest to the object side is NDo, and the NDi and the NDo meet that the NDi- NDo> 0.1.

Description

technical field [0001] The invention relates to a zoom lens, in particular to a zoom lens with thinness, low cost, high magnification and good imaging quality. Background technique [0002] An image capture device, such as a digital camera or a digital video camera, usually captures an image of an object to be photographed through a lens module and an image sensor, wherein the lens module refracts the light beam from the object to be photographed and focuses it on the image sensor , and then the image sensor converts the analog optical signal into a digital electronic signal for subsequent image processing, storage and transmission. [0003] The lens module of the image capture device is usually composed of three to six lens groups, and generally the fewer the lens groups, the lower the cost and the smaller the size of the lens module. However, a lens module with a low number of lens groups may not be able to meet the requirements of high magnification. [0004] In view of...

Claims

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Application Information

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IPC IPC(8): G02B15/177G02B3/02G02B1/04G02B1/00
Inventor 周祥禾
Owner ABILITY ENTERPRISE CO LTD
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