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Industrial lens

A lens, industrial technology, applied in the field of optical lenses, can solve the problems of aberration, distortion, image black, etc., achieve high image quality, reduce processing and assembly costs, and widely used.

Active Publication Date: 2019-12-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The size of the industrial lens needs to match the size of the chip, otherwise the image cannot be captured completely, and the part of the image that cannot be captured will appear black, causing serious distortion and aberration
For example, a small-sized industrial lens is suitable for a narrow range of chip sizes and cannot be used for large-sized chips
[0004] As the size of the chip is larger, the size of the object surface that can be photographed is larger, but a large-size chip needs to match a large-size industrial lens, and a large-size industrial lens is expensive and cannot be used on a large scale

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this embodiment, the first lens group A is sequentially provided with a lens group A1, a variable diaphragm S and a lens group A2 along the light incident direction;

[0044] Wherein, the lens group A1 is provided with a meniscus positive lens A1, a biconvex positive lens A2 and a biconcave negative lens A3 sequentially along the light incident direction, wherein the meniscus positive lens A2 and the meniscus negative lens A3 form a doublet lens.

[0045] The lens group A2 is sequentially provided with a meniscus negative lens A4, a meniscus positive lens A5 and a plano-convex positive lens A6 along the light incident direction, wherein the meniscus negative lens A4 and the meniscus positive lens A5 form a doublet lens.

[0046] The second lens group B is provided with a biconvex positive lens B1 and a meniscus negative lens B2, which are cemented to form a doublet lens.

[0047] Combined focal length f of the first lens group A A is 25.1mm, the combined focal lengt...

Embodiment 2

[0059] In this embodiment, the first lens group A is sequentially provided with a lens group A1, a variable diaphragm S and a lens group A2 along the light incident direction;

[0060] Wherein, the lens group A1 is provided with a meniscus positive lens A1, a biconvex positive lens A2 and a biconcave negative lens A3 sequentially along the light incident direction, wherein the meniscus positive lens A2 and the meniscus negative lens A3 form a doublet lens.

[0061] The lens group A2 is sequentially provided with a meniscus negative lens A4, a meniscus positive lens A5 and a plano-convex positive lens A6 along the light incident direction, wherein the meniscus negative lens A4 and the meniscus positive lens A5 form a doublet lens.

[0062] The second lens group B is provided with a biconvex positive lens B1 and a meniscus negative lens B2, which are cemented to form a doublet lens.

[0063] Combined focal length f of the first lens group A A is 24.1mm, the combined focal lengt...

Embodiment 3

[0070] In this embodiment, the first lens group A is sequentially provided with a lens group A1, a variable diaphragm S and a lens group A2 along the light incident direction;

[0071] Wherein, the lens group A1 is provided with a meniscus positive lens A1, a biconvex positive lens A2 and a biconcave negative lens A3 sequentially along the light incident direction, wherein the meniscus positive lens A2 and the meniscus negative lens A3 form a doublet lens.

[0072] The lens group A2 is sequentially provided with a meniscus negative lens A4, a meniscus positive lens A5 and a plano-convex positive lens A6 along the light incident direction, wherein the meniscus negative lens A4 and the meniscus positive lens A5 form a doublet lens.

[0073] The second lens group B is provided with a biconvex positive lens B1 and a meniscus negative lens B2, which are cemented to form a doublet lens.

[0074] Combined focal length f of the first lens group A A is 23.0mm, the combined focal lengt...

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Abstract

The invention discloses an industrial lens comprising a first lens group A with a positive focal length on the object side and a second lens group B with a positive focal length on the image side, wherein the first lens group A comprises a variable light column S, a lens group A1 located in the variable light column S near the object side, and a lens group A2 located in the variable light column Snear the image side; and the second lens group B is a double-cemented lens. The industrial lens provided by the invention with a 2 / 3-inch chip design has a clear aperture that can be changed betweenF / 2.8 and F / 8.0, and when the clear aperture is F / 2.8, the objects with a working distance greater than 0.2m can achieve imaging quality of more than 10 million pixels. At the same time, the industrial lens can match a 1-inch chip, and when the clear aperture is F / 8.0, the objects with the working distance greater than 0.2m can achieve imaging quality of 5 million pixels, which is high in image quality and can meet industrial needs. Compared with the prior art, the industrial lens provided by the invention avoids the use of expensive large-size lenses and has a wide range of applications.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to an industrial lens. Background technique [0002] Industrial cameras are commonly known as video cameras. Compared with traditional civilian cameras, they have high image stability, high transmission capacity and high anti-interference ability. Industrial lenses are an important part of industrial cameras. The main function of industrial lenses is to image the target on the photosensitive surface of the photosensitive chip. The quality of the lens directly affects the overall performance of the machine vision system. Reasonable selection and installation of the lens is an important part of the design of the machine vision system. [0003] The size of the industrial lens needs to match the size of the chip, otherwise the image cannot be captured completely, and the part of the image that cannot be captured will appear black, causing serious distortion and aberration. For example, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/0015G02B13/006
Inventor 张新彬陈怀熹李广伟冯新凯古克义梁万国黄玉宝
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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