Visual lens

A lens and vision technology, applied in optical components, optics, instruments, etc., can solve problems such as shortening the object distance, and achieve the effect of reducing high-order aberrations, meeting costs, and high relative illumination

Pending Publication Date: 2018-01-26
舜宇光学(中山)有限公司
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  • Abstract
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Problems solved by technology

However, the current visual lens structure cannot further shorten the object distance to meet the image quality requirements

Method used

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Embodiment approach

[0073] According to an embodiment of the present invention, when the second lens group B includes three lenses, the second lens group B can be composed of a fourth lens 4 with positive refractive power, a fifth lens 5 with negative refractive power, and a fifth lens with negative refractive power. The sixth lens 6 is composed of positive refractive power. In this embodiment, the refractive power of each lens in the second lens group B can also be set in other ways, as long as the overall refractive power of the second lens group B is guaranteed to be positive.

[0074] In this embodiment, the third lens group C includes a seventh lens 7 with positive power, an eighth lens 8 with negative power, a ninth lens 9 with positive power, and a tenth lens with positive power. Lens 10.

[0075] In this embodiment, the first lens 1 and the second lens 2 constitute a cemented lens group, and the fourth lens 4 and the fifth lens 5 constitute a cemented lens group. The seventh lens 7 and ...

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Abstract

The invention relates to a visual lens. The visual lens comprises a first lens group, a second lens group, a diaphragm and a third lens group which are sequentially arranged from an object side to animage side along an optical axis, and is characterized in that the first lens group form a fixed group, the second lens group, the diaphragm and the third lens group form a focusing group; the first lens group is a negative focal power lens group; the second lens group and the third lens group are positive focal power lens groups; the first lens group is formed by three lenses; the second lens group comprises at least three lenses; and the third lens group is formed by four lenses. The visual lens of the invention has the characteristics of high resolution, large view field angle, large aperture and short object distance.

Description

technical field [0001] The invention relates to the technical field of optical system and device design, in particular to a machine vision lens. Background technique [0002] Machine vision is the use of machines instead of human eyes for measurement and judgment. The machine vision system refers to converting the target to be detected into an image signal through a machine vision product (that is, an image capture device, which is divided into two types: CMOS and CCD), and then the image processing system performs various operations on these signals to extract target features, so as to realize Control of field device actions. [0003] At present, general machine vision lenses cannot meet the requirements of large field of view, large aperture, long focal length, high resolution and close object distance, and cannot meet the needs of high-end products. As shown in the Chinese patent with the patent number "CN105866929A", the lens consists of the first lens with positive po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/00
Inventor 梁伟朝张鸿佳付湘发白兴安贺保丁韦晓鹏张德伦周静蓝岚
Owner 舜宇光学(中山)有限公司
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