CN208314309U - 35mm is big, and target surface machine vision line sweeps camera lens - Google Patents
35mm is big, and target surface machine vision line sweeps camera lens Download PDFInfo
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- CN208314309U CN208314309U CN201820950379.6U CN201820950379U CN208314309U CN 208314309 U CN208314309 U CN 208314309U CN 201820950379 U CN201820950379 U CN 201820950379U CN 208314309 U CN208314309 U CN 208314309U
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Abstract
The utility model discloses the big target surface machine vision lines of 35mm to sweep camera lens, including the first lens G1 with positive light coke, bent moon structure, the second lens G2 with positive light coke, bent moon structure, the third lens G3 with negative power, bent moon structure, the 4th lens G4 with negative power, bent moon structure, with positive light coke, the 5th lens G5 of bent moon structure and the 6th lens G6 with positive light coke, plano-convex or bent moon structure；Second lens G2 and the third lens G3 form the first balsaming lens B1, the 4th lens G4 and the 5th lens G5 the second balsaming lens B2 of composition, meet following relationship: 2≤| fB2/fB1 |≤4；The focal length of optical system is f ', and half image height of target surface of optical system is y ', meets relational expression: | y '/f ' | >=0.4.The utility model has the characteristics that resolution is high, aberration rate is low, and with the variation of enlargement ratio, imaging does very well.
Description
Technical field
The utility model relates to machine visual lens technical fields, and in particular to a kind of big target surface machine vision line of 35mm is swept
Camera lens.
Background technique
Machine vision is exactly to replace human eye with machine to measure and judge.NI Vision Builder for Automated Inspection, which refers to, passes through machine vision
Product (i.e. image-pickup device is divided to two kinds of CMOS and CCD) will be ingested target and be converted into picture signal, send dedicated figure to
As processing system is transformed into digitized signal according to the information such as pixel distribution and brightness, color；Picture system is to these signals
Various operations are carried out to extract clarification of objective, and then control the device action at scene according to the result of differentiation.Therefore, machine
Vision system is widely used for the fields such as operating condition monitoring, product inspection and quality control.
Currently, line scanning lens are the important composition components of many NI Vision Builder for Automated Inspections, and clearly, accurately by camera lens
Obtain the basis that true image is subsequent image analysis processing.Line on domestic market sweep camera lens imaging definition,
Performance in terms of aberration rate is barely satisfactory, and high-precision, high-quality product are still mostly based on foreign brand name.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, and provide a kind of big target surface machine vision of 35mm
Line sweeps camera lens, and higher resolution and lower distortion are possessed when using big target surface, different from the resolution meeting of conventional lenses
Very big variation is generated with the change of enlargement ratio, which has more stable imaging table in available enlargement ratio
It is existing.
To achieve the above objectives, the present invention adopts the following technical solutions:
35mm is big, and target surface machine vision line sweeps camera lens, including mechanical system and the optics being installed on inside the mechanical system
System, the optical system successively include the first lens G1 with positive light coke, bent moon structure by object space to image space, are had just
Second lens G2 of focal power, bent moon structure, the third lens G3 with negative power, bent moon structure have negative power, curved
4th lens G4 of month structure, with positive light coke, the 5th lens G5 of bent moon structure and with positive light coke, plano-convex or bent moon
6th lens G6 of structure；The second lens G2 and the third lens G3 the first balsaming lens of composition B1, the described 4th thoroughly
Mirror G4 and the 5th lens G5 form the second balsaming lens B2, meet following relationship: 2≤| fB2/fB1 |≤4；It is described
The focal length of optical system is f ', and half image height of target surface of the optical system is y ', meets relational expression: | y '/f ' | >=0.4.
A kind of improvement of camera lens, the optical system are swept as the big target surface machine vision line of 35mm described in the utility model
Focal length meet relational expression between f ' and the first focal length of lens f1: 0.8≤| f1/f ' |≤1.2.
A kind of improvement of camera lens, the optical system are swept as the big target surface machine vision line of 35mm described in the utility model
Focal length meet relational expression between f ' and the 6th focal length of lens f6: 0.7≤| f6/f ' |≤1.2.
A kind of improvement of camera lens, second lens are swept as the big target surface machine vision line of 35mm described in the utility model
Refractive index be n2, Abbe number v2 meets relational expression: 1.5≤n2≤1.7；60≤v2≤70.
A kind of improvement of camera lens, the third lens are swept as the big target surface machine vision line of 35mm described in the utility model
Refractive index be n3, Abbe number v3 meets relational expression: 1.55≤n3≤1.75；30≤v3≤40.
The refractive index of 4th lens is n4, and Abbe number v4 meets relational expression: 1.55≤n4≤1.75；30≤
v4≤40。
A kind of improvement of camera lens, the 5th lens are swept as the big target surface machine vision line of 35mm described in the utility model
Refractive index be n5, Abbe number v5 meets relational expression: 1.6≤n5≤1.8；50≤v5≤60.
A kind of improvement of camera lens, first lens are swept as the big target surface machine vision line of 35mm described in the utility model
G1 to the 6th lens G6 is glass spherical lens.
A kind of improvement that camera lens is swept as the big target surface machine vision line of 35mm described in the utility model, further includes diaphragm,
The diaphragm is set between the third lens G3 and the 4th lens G4, and the aperture of the diaphragm is circular hole, diaphragm
Aperture is adjustable within the scope of F2.8~F32.
The utility model has the beneficial effects that: the utility model have when using big target surface higher resolution and compared with
Low distortion can generate very big variation with the change of enlargement ratio different from the resolution of conventional lenses, which exists
It can be with there is more stable imaging to show in enlargement ratio.The nominal one of the optical system is 0.10X, can use amplification
Multiplying power is 0.04X~0.33X.Within the scope of available enlargement ratio, by changing the object distance of camera lens, and adjusting rear cut-off distance can be clear
Imaging.Wherein, under nominal one, full filed distorts less than 0.05%.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment and its explanation of the utility model are not constituted for explaining the utility model to the utility model
Improper restriction.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the index path of optical system in the utility model；
Fig. 3 is the MTF curve figure of the optical system of the utility model；
Fig. 4 is the field curve figure of the optical system of the utility model；
Fig. 5 is the distortion curve of the optical system of the utility model.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can within a certain error range solve described in
Technical problem basically reaches the technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
As shown in Fig. 1~5, the big target surface machine vision line of 35mm sweeps camera lens, including mechanical system and is installed on mechanical system
Internal optical system, optical system successively includes the first lens G1 with positive light coke, bent moon structure by object space to image space,
The second lens G2 with positive light coke, bent moon structure, the third lens G3 with negative power, bent moon structure have negative light
4th lens G4 of focal power, bent moon structure, with positive light coke, bent moon structure the 5th lens G5 and there is positive light coke, flat
Convex or bent moon structure the 6th lens G6；Second lens G2 and the third lens G3 forms the first balsaming lens B1, the 4th lens G4
The second balsaming lens B2 is formed with the 5th lens G5, meets following relationship: 2≤| fB2/fB1 |≤4；The coke of optical system
Away from for f ', half image height of target surface of optical system is y ', meets relational expression: | y '/f ' | >=0.4.
Preferably, the focal length of optical system meets relational expression between f ' and the first focal length of lens f1: 0.8≤| f1/f ' |
≤1.2。
Preferably, the focal length of optical system meets relational expression between f ' and the 6th focal length of lens f6: 0.7≤| f6/f ' |
≤1.2。
Preferably, the refractive index of the second lens is n2, and Abbe number v2 meets relational expression: 1.5≤n2≤1.7；60≤
v2≤70。
Preferably, the refractive index of the third lens is n3, and Abbe number v3 meets relational expression: 1.55≤n3≤1.75；30
≤v3≤40。
Preferably, the refractive index of the 4th lens is n4, and Abbe number v4 meets relational expression: 1.55≤n4≤1.75；30
≤v4≤40。
The refractive index of 5th lens is n5, and Abbe number v5 meets relational expression: 1.6≤n5≤1.8；50≤v5≤60.
Preferably, the first lens G1 to the 6th lens G6 is glass spherical lens.
The utility model further includes diaphragm 100, and diaphragm 100 is set between the third lens G3 and the 4th lens G4, diaphragm
100 aperture is circular hole, and the aperture of diaphragm 100 is adjustable within the scope of F2.8~F32.
In the present embodiment, optical system data is as follows
| f1(mm) | fB1(mm) | fB2(mm) | f6(mm) | f’(mm) | y’(mm) |
| 35.505 | -55.518 | -116.464 | 32.636 | 35 | 15 |
| |f1/f’| | |fB2/fB1| | |f6/f’| | |y’/f’| |
| 1.014 | 2.1 | 0.932 | 0.429 |
| Operating distance (mm) | True field (mm) | Enlargement ratio (mm) |
| 895 | 750 | 0.04X |
| 370 | 300 | 0.10X |
| 130 | 90 | 0.33X |
In the present embodiment, the focal length of optical system be 35mm, enlargement ratio be 0.04X~0.33X, aperture be F2.8~
F32, target surface size are 30mm.Under nominal one, distort less than 0.05%.As shown in figure 3, the optical system of the present embodiment
0.3, the 0.8 visual field mtf value > 0.4 of mtf value > of system full filed in 40lp/mm, can match 12.5 μm of pixel dimension or more
Imager chip.As shown in figure 4, the image planes size of the present embodiment isThe picture point of entire visual field is in image planes position
Within the scope of 0.3mm, illustrate that the optical system of the present embodiment has lesser curvature of the image.
Several preferred embodiments of the utility model have shown and described in above description, but as previously described, it should be understood that
The utility model is not limited to forms disclosed herein, and is not to be taken as the exclusion to other embodiments, and can be used for
Other combinations, modifications, and environments, and above-mentioned introduction or correlation can be passed through within the scope of the inventive concept described herein
The technology or knowledge in field are modified.And changes and modifications made by those skilled in the art do not depart from the spirit of the utility model
And range, then it all should be in the protection scope of the appended claims for the utility model.
Claims (9)
1.35mm is big, and target surface machine vision line sweeps camera lens, it is characterised in that: including mechanical system and is installed on the mechanical system
Internal optical system, the optical system by object space to image space successively include have positive light coke, bent moon structure it is first saturating
Mirror G1, the second lens G2 with positive light coke, bent moon structure, the third lens G3 with negative power, bent moon structure have
4th lens G4 of negative power, bent moon structure, with positive light coke, the 5th lens G5 of bent moon structure and with positive light focus
6th lens G6 of degree, plano-convex or bent moon structure；The second lens G2 and the third lens G3 forms the first balsaming lens
B1, the 4th lens G4 and the 5th lens G5 form the second balsaming lens B2, meet following relationship: 2≤| fB2/
fB1|≤4；The focal length of the optical system is f ', and half image height of target surface of the optical system is y ', meets relational expression: | y '/f '
|≥0.4。
2. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the optical system
Focal length is to meet relational expression between f ' and the first focal length of lens f1: 0.8≤| f1/f ' |≤1.2.
3. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the optical system
Focal length is to meet relational expression between f ' and the 6th focal length of lens f6: 0.7≤| f6/f ' |≤1.2.
4. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: second lens
Refractive index is n2, and Abbe number v2 meets relational expression: 1.5≤n2≤1.7；60≤v2≤70.
5. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the third lens
Refractive index is n3, and Abbe number v3 meets relational expression: 1.55≤n3≤1.75；30≤v3≤40.
6. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the 4th lens
Refractive index is n4, and Abbe number v4 meets relational expression: 1.55≤n4≤1.75；30≤v4≤40.
7. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the 5th lens
Refractive index is n5, and Abbe number v5 meets relational expression: 1.6≤n5≤1.8；50≤v5≤60.
8. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: the first lens G1
It is glass spherical lens to the 6th lens G6.
9. the big target surface machine vision line of 35mm according to claim 1 sweeps camera lens, it is characterised in that: it further include diaphragm, institute
It states diaphragm to be set between the third lens G3 and the 4th lens G4, the aperture of the diaphragm is circular hole, the light of diaphragm
It encloses adjustable within the scope of F2.8~F32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950379.6U CN208314309U (en) | 2018-06-20 | 2018-06-20 | 35mm is big, and target surface machine vision line sweeps camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950379.6U CN208314309U (en) | 2018-06-20 | 2018-06-20 | 35mm is big, and target surface machine vision line sweeps camera lens |
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| Publication Number | Publication Date |
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| CN208314309U true CN208314309U (en) | 2019-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681036A (en) * | 2018-06-20 | 2018-10-19 | 广东奥普特科技股份有限公司 | 35mm is big, and target surface machine vision line sweeps camera lens |
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2018
- 2018-06-20 CN CN201820950379.6U patent/CN208314309U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681036A (en) * | 2018-06-20 | 2018-10-19 | 广东奥普特科技股份有限公司 | 35mm is big, and target surface machine vision line sweeps camera lens |
| CN108681036B (en) * | 2018-06-20 | 2023-08-22 | 广东奥普特科技股份有限公司 | 35mm large target surface machine vision line scanning lens |
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