CN107894651A

CN107894651A - Machine Vision Detection camera lens

Info

Publication number: CN107894651A
Application number: CN201711361187.8A
Authority: CN
Inventors: 杨利全; 谢超; 张熠; 王孝晨
Original assignee: Suzhou Co Ltd Of Ling Hou Robot
Current assignee: Suzhou Co Ltd Of Ling Hou Robot
Priority date: 2017-12-18
Filing date: 2017-12-18
Publication date: 2018-04-10

Abstract

The invention belongs to optical lens technical field, it is related to a kind of Machine Vision Detection camera lens, including along the first lens of incident ray transmission direction successively co-axial alignment, the second lens, the 3rd lens, perfect lens and image planes eyeglass.The present invention can be reached simultaneously to the top for shooting object and image side faces by the parameter designing to the optical lens, avoid using more cameras and imaging lens in Machine Vision Detection or differentiate is applied.

Description

Machine Vision Detection camera lens

Technical field

It is more particularly to a kind of to shoot determinand front and side simultaneously the present invention relates to optical lens technical field Machine Vision Detection camera lens.

Background technology

With the fast development of industrial automation, more and more high, the traditional machine of the technical requirements to machine visual lens Vision-based detection camera lens can only shoot the one side of measured object, if necessary to detect multiaspect (front and side) simultaneously, then need to take With multiple detector lens, detection device space is not only taken up, and adds the cost of equipment.

Therefore, it is necessary to a kind of new optical lens is provided to solve the above problems.

The content of the invention

It is a primary object of the present invention to provide a kind of machine vision inspection that can shoot determinand front and side simultaneously Survey camera lens.

The present invention is achieved through the following technical solutions above-mentioned purpose：A kind of Machine Vision Detection camera lens, including along incident light Line transmission direction the first lens of co-axial alignment, the second lens, the 3rd lens, perfect lens and image planes eyeglass successively；Described One lens are the biconvex positive lens for including the first plane of incidence S1 and the first exit facet, and the axial width of first lens is 10mm, the radius of curvature of first plane of incidence is 106.41mm, and the radius of curvature of the first exit facet is 119.45mm；Described second is saturating Mirror is the biconvex positive lens for including second plane of incidence and the second exit facet, and the axial width d2 of the second lens is 16mm, and second enters The radius of curvature for penetrating face is 100.51mm, and the radius of curvature of the second exit facet is 60.5mm；3rd lens are to include the 3rd The concavo-convex negative lens of the plane of incidence and the 3rd exit facet, the axial width of the 3rd lens is 13mm, and the 3rd plane of incidence is radius of curvature 59.0mm concave surface, the 3rd exit facet are radius of curvature 527.33mm convex surface, radius of curvature and thickness error all ± 5% with It is interior.

Specifically, the refractive index and Abbe number ratio of first lens are 0.025, within error ± 5%.

Specifically, the refractive index and Abbe number ratio of second lens are 0.065, within error ± 5%.

Specifically, the refractive index and Abbe number ratio of the 3rd lens are 0.055, within error ± 5%.

Specifically, the focal length of the perfect lens is 9mm, the axial spacing of the perfect lens and the 3rd lens is 100mm, the spacing of the perfect lens and image planes eyeglass is 8.7mm.

Compared with prior art, the beneficial effect of machine vision-based detection camera lens is：

The present invention by the parameter designing to the optical lens, can reach simultaneously to the top of shooting object and side into Picture, avoid using more cameras and imaging lens in Machine Vision Detection or discriminating application.

Brief description of the drawings

Fig. 1 is the schematic diagram under the Machine Vision Detection camera lens working condition of embodiment 1.

Fig. 2 is the schematic diagram under the Machine Vision Detection camera lens working condition of embodiment 2.

Fig. 3 is the schematic diagram under the Machine Vision Detection camera lens working condition of embodiment 3.

Numeral represents in figure：

The lens of L1- first,

The planes of incidence of S1- first,

The exit facets of S2- first；

The lens of L2- second,

The exit facets of S3- second,

The exit facets of S4- second；

The lens of L3- the 3rd,

The planes of incidence of S5- the 3rd,

The exit facets of S6- the 3rd；

PL- perfect lenses；

S- image planes eyeglasses；

O1- object planes.

Embodiment

The present invention is described in further detail with reference to specific embodiment.

The present invention is a kind of Machine Vision Detection camera lens, including first along incident ray transmission direction successively co-axial alignment Lens L1, the second lens L2, the 3rd lens L3, perfect lens PL and image planes eyeglass S；Wherein the first lens L1 is to include first to enter Face S1 and the first exit facet S2 biconvex positive lens are penetrated, the first lens L1 axial width d1 is 10mm, the first plane of incidence S1's Radius of curvature is 106.41mm, and the first exit facet S2 radius of curvature is 119.45mm；Second lens L2 is to include the second incidence Face S3 and the second exit facet S4 biconvex positive lens, the second lens L2 axial width d2 are 16mm, the second plane of incidence S3 song Rate radius is 100.51mm, and the second exit facet S4 radius of curvature is 60.5mm；3rd lens L3 is to include the 3rd plane of incidence S5 With the 3rd exit facet S6 concavo-convex negative lens, the 3rd lens L3 axial width is 13mm, and the 3rd plane of incidence S5 is radius of curvature 59.0mm concave surface, the 3rd exit facet S6 are radius of curvature 527.33mm convex surface, and radius of curvature and thickness error are all ± 5% Within.It is object space on the left of camera lens, is image space on the right side of camera lens.The object plane O1 of determinand is located at object space, and the light of determinand can be successively Projected through the first lens L1, the second lens L2, the 3rd lens L3 and perfect lens PL on image planes eyeglass S, on image planes eyeglass S The corresponding conical region of imaging, so can be avoided simultaneously to shooting top and the image side faces of object in machine vision More cameras and imaging lens are used in detection or discriminating application.

First lens L1 refractive index and Abbe number ratio is 0.025, the second lens L2 refractive index and Abbe number ratio For 0.065, the 3rd lens L3 refractive index and Abbe number ratio are 0.055, and error is within ± 5%.Refractive index and Abbe Number ratio is determined by the glass material of lens, the resolution ratio of imaging and brightness is met observation from the lens of specific materials It is required that.

Perfect lens PL focal length is that 9mm, perfect lens PL and the 3rd lens L3 axial spacing are 100mm, preferable saturating Mirror PL and image planes eyeglass S spacing is 8.7mm.So being arranged to picture must be than more visible.

As shown in Figure 1 to Figure 3, object plane O1 to S1 axial distance wd can change according to the high h of thing difference：

Embodiment 1：

When the high h1 of thing is 25.62 ± 2mm, corresponding wd1 is 70 ± 3mm.

Embodiment 2：

When the high h2 of thing is 32.92 ± 2mm, corresponding wd2 is 52 ± 3mm.

Embodiment 3：

When the high h3 of thing is 53.46 ± 2mm, corresponding wd3 is 29 ± 3mm.

Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not On the premise of departing from the invention design, various modifications and improvements can be made, these belong to the protection model of the present invention Enclose.

Claims

A kind of 1. Machine Vision Detection camera lens, it is characterised in that：Including along the of incident ray transmission direction successively co-axial alignment One lens, the second lens, the 3rd lens, perfect lens and image planes eyeglass；First lens be include the first plane of incidence S1 and The biconvex positive lens of first exit facet, the axial width of first lens is 10mm, and the radius of curvature of first plane of incidence is 106.41mm, the radius of curvature of the first exit facet is 119.45mm；Second lens are to include second plane of incidence and second to go out The biconvex positive lens in face are penetrated, the axial width d2 of the second lens is 16mm, and the radius of curvature of second plane of incidence is 100.51mm, the The radius of curvature of two exit facets is 60.5mm；3rd lens be include the 3rd plane of incidence and the 3rd exit facet bumps it is negative saturating Mirror, the axial width of the 3rd lens is 13mm, and the 3rd plane of incidence is radius of curvature 59.0mm concave surface, and the 3rd exit facet is curvature Radius 527.33mm convex surface, radius of curvature and thickness error are all within ± 5%.
2. Machine Vision Detection camera lens according to claim 1, it is characterised in that：The refractive indexes of first lens and Ah Shellfish number ratio is 0.025, within error ± 5%.
3. Machine Vision Detection camera lens according to claim 1, it is characterised in that：The refractive indexes of second lens and Ah Shellfish number ratio is 0.065, within error ± 5%.
4. Machine Vision Detection camera lens according to claim 1, it is characterised in that：The refractive indexes of 3rd lens and Ah Shellfish number ratio is 0.055, within error ± 5%.
5. Machine Vision Detection camera lens according to claim 1, it is characterised in that：The focal length of the perfect lens is 9mm, The axial spacing of the perfect lens and the 3rd lens is 100mm, and the spacing of the perfect lens and image planes eyeglass is 8.7mm.