CN207586521U - vision lens - Google Patents
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- CN207586521U CN207586521U CN201721423873.9U CN201721423873U CN207586521U CN 207586521 U CN207586521 U CN 207586521U CN 201721423873 U CN201721423873 U CN 201721423873U CN 207586521 U CN207586521 U CN 207586521U
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Abstract
The utility model is related to a kind of vision lens, the first lens group of the fixed group of composition including being arranged in order along optical axis from object side to image side and the second lens group, diaphragm and the third lens group for forming focusing group；First lens group is negative-power lenses group；Second lens group and the third lens group are positive power lens group；First lens group is made of three pieces lens；Second lens group includes at least three pieces lens；The third lens group is made of four lens.Vision lens according to the present utility model have the characteristics that high-resolution, big field angle, large aperture and nearly object distance.
Description
Technical field
The utility model is related to optical system and device design field more particularly to a kind of machine visual lens.
Background technology
Machine vision is exactly to replace human eye with machine to measure and judge.NI Vision Builder for Automated Inspection refers to pass through machine vision
The target that product (i.e. image-pickup device is divided to two kinds of CMOS and CCD) will detect is converted into picture signal, then by image
Reason system carries out various operations to extract target signature to these signals, so as to fulfill the control of field device action.
At present, general machine visual lens can not take into account big visual field, heavy caliber, long-focus, high-resolution and nearly object distance
Requirement, high-end product demand can not be met.As shown in the Chinese patent of Patent No. " CN105866929A ", the camera lens is from object
Side is to image space successively by the first lens of positive light coke, the second lens of negative power, the third lens of negative power, positive light focus
The 4th lens, the 5th lens of positive light coke, the 6th lens of positive light coke and the 7th lens of negative power of degree bond, positive light
The 8th lens of focal power, the 9th lens of negative power are bonded with the tenth lens of positive light coke.This system realizes high-resolution, big
The characteristics of aperture, big visual field.But it is growing due to machine vision product, the performances such as the investigative range of camera lens are proposed
Higher requirement.And current vision lens structure can not further shorten object distance, meet image quality requirement.
Invention content
One of the utility model is designed to provide one kind and has high-resolution, big field angle, large aperture and nearly object
Vision lens away from characteristic.
For achieving the above object, the utility model provides a kind of vision lens, including：Along optical axis from object side to image side
First lens group of the fixed group of composition being arranged in order and the second lens group, diaphragm and the third lens group for forming focusing group；
First lens group is negative-power lenses group；
Second lens group and the third lens group are positive power lens group；
First lens group is made of three pieces lens；
Second lens group includes at least three pieces lens；
The third lens group is made of four lens.
One side according to the present utility model, first lens group include the first lens with positive light coke, tool
There are the second lens of negative power and the third lens with negative power.
One side according to the present utility model, when second lens group includes three pieces lens, second lens group
Including the 4th lens, the 5th lens and the 6th lens；
The third lens group include the 7th lens with positive light coke, the 8th lens with negative power, with
9th lens of positive light coke and the tenth lens with positive light coke.
One side according to the present utility model, first lens form cemented doublet group with second lens；
4th lens form cemented doublet group with the 5th lens；
7th lens form cemented doublet group with the 8th lens.
One side according to the present utility model, when second lens group includes four lens, second lens group
Including the 4th lens, the 5th lens, the 6th lens and the 7th lens；
The third lens group include the 8th lens with positive light coke, the 9th lens with negative power, with
Tenth lens of positive light coke and the 11st lens with positive light coke.
One side according to the present utility model, first lens form cemented doublet group with second lens；
6th lens are independently arranged or form cemented doublet group with the 7th lens；
8th lens form cemented doublet group with the 9th lens.
One side according to the present utility model, first lens (1) form cemented doublet with second lens (2)
Group；
4th lens (4) form cemented doublet group with the 5th lens (5)；
8th lens (8) form cemented doublet group with the 9th lens (9)
One side according to the present utility model, when second lens group includes five lens, second lens group
Including the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens；
The third lens group include the 9th lens with positive light coke, the tenth lens with negative power, with
11st lens of positive light coke and the 12nd lens with positive light coke.
One side according to the present utility model, the 4th lens form cemented doublet group with the 5th lens；
7th lens form cemented doublet group with the 8th lens；
9th lens form cemented doublet group with the tenth lens.
One side according to the present utility model, the camera lens take the photograph remote structure using counter, and effective focal length f is formed solid
Surely the effective focal length of first lens group (A) organized is fA, effective focal length f and effective focal length fABetween meet relational expression：-2.5
＜ fA/ f ＜ -1.8.
One side according to the present utility model, second lens group, the diaphragm and the third lens group are formed
The focusing group effective focal length be fT, meet relational expression between the effective focal length f of the camera lens：1.2 ＜ fT/ f ＜
1.6。
One side according to the present utility model, the Abbe numbers of first lens are V1, the Abbe of second lens
Number meets relational expression for V2, Abbe number V1 and Abbe number V2：V1-V2 ＞ 16.
One side according to the present utility model, the Abbe number of the third lens is V3, meets relational expression：50 ＜ V3 ＜
75。
One side according to the present utility model, the airspace D between the third lens and the 4th lens34It is full
Sufficient relational expression：8.5 ＜ D34＜ 19.
One side according to the present utility model, the total focal length of second lens group is fB, total coke of the focusing group
Away from for F, total focal length fBMeet relational expression between total focal length F：0.8 ＜ fB/ F ＜ 1.5.
One side according to the present utility model, the refractive index of the 9th lens is N9, meets relational expression：1.65 ＜ N9
＜ 1.75；
The Abbe number of 9th lens is V9, meets relational expression：29 ＜ V9 ＜ 55.
One side according to the present utility model, the aperture F# of the camera lens meet relational expression：2 ＜ F# ＜ 2.55.
One side according to the present utility model, the focusing amount Δ D of the camera lens meet 0.75 ＜ Δ D ＜ 1.6 of relational expression.
One side according to the present utility model, the lens use full glass spheric glass.
Vision lens according to the present utility model use anti-structure of dolly-out,ing dolly-back, and pass through the light of reasonable distribution fixation group and focusing group
Focal power while ensureing that system has longer optic back focal, effectively reduces optical system distortion.
Three to five lens composition may be used in vision lens according to the present utility model, the second lens group, when second thoroughly
When microscope group is made of three pieces or four lens, object distance range is reduced into infinite as far as 0.4m, has in entire object distance range
There is high-resolution, meet the use demand of the big nearly object distance in visual field large aperture, while can meet the needs of inexpensive.When second thoroughly
When microscope group B is made of five lens, object distance range is adjusted to 0.9m to 0.15m, equally has height in entire object distance range
Resolution ratio meets the use demand of the big nearly object distance in visual field large aperture.
It is set within the above range according to the first lens of invention and the second lens Abbe number, it is glued saturating to advantageously reduce two
The focal power of mirror reduces the incidence angle of chief ray, so as to reduce high-order spherical aberration and assembling sensitivity.The Abbe number of third lens exists
It is set in above range, the magnification error of system can be corrected.Airspace is provided between third lens and the 4th lens, it can
To correct the system curvature of field.The refractive index of 9th lens 9 and the setting of Abbe number, can correct system axial aberration.
Vision lens according to the present utility model, the total focal length f of the second lens groupBIt is full between the total focal length F of focusing group
Sufficient 0.8 ＜ f of relational expressionBThe setting of/F ＜ 1.5.The higher order aberratons of system can be reduced by being arranged such.The f-number F# of camera lens expires
Sufficient relational expression：2 ＜ F# ＜ 2.55.Such setting can cause camera lens to keep higher relative illumination in entire field depth.
The focusing amount Δ D of camera lens meets 0.75 ＜ Δ D ＜ 1.6 of relational expression.It is arranged such and higher focusing rate can be achieved.
Description of the drawings
Fig. 1 schematically shows the structure chart of the vision lens according to the utility model embodiment 1；
Fig. 2 is schematically shown according to maximum field of view's meridians of the vision lens of the utility model embodiment 1 to light fan figure；
Fig. 3 is schematically shown according to maximum field of view's sagitta of arc of the vision lens of the utility model embodiment 1 to light fan figure；
Fig. 4 schematically shows the axial chromatic aberration figure according to the vision lens of the utility model embodiment 1；
Fig. 5 schematically shows the lateral chromatic aberration figure according to the vision lens of the utility model embodiment 1；
Fig. 6 schematically shows the distortion figure of the vision lens according to the utility model embodiment 1；
Fig. 7 schematically shows the structure chart of the vision lens of embodiment 2 according to the present utility model；
Fig. 8 is schematically shown according to maximum field of view's meridians of the vision lens of the utility model embodiment 2 to light fan figure；
Fig. 9 is schematically shown according to maximum field of view's sagitta of arc of the vision lens of the utility model embodiment 2 to light fan figure；
Figure 10 schematically shows the axial chromatic aberration figure according to the vision lens of the utility model embodiment 2；
Figure 11 schematically shows the lateral chromatic aberration figure according to the vision lens of the utility model embodiment 2；
Figure 12 schematically shows the distortion figure of the vision lens according to the utility model embodiment 2；
Figure 13 schematically shows the structure chart of the vision lens of embodiment 3 according to the present utility model；
Figure 14 is schematically shown to be fanned according to maximum field of view's meridian of the vision lens of the utility model embodiment 3 to light
Figure；
Figure 15 is schematically shown to be fanned according to maximum field of view's sagitta of arc of the vision lens of the utility model embodiment 3 to light
Figure；
Figure 16 schematically shows the axial chromatic aberration figure according to the vision lens of the utility model embodiment 3；
Figure 17 schematically shows the lateral chromatic aberration figure according to the vision lens of the utility model embodiment 3；
Figure 18 schematically shows the distortion figure of the vision lens according to the utility model embodiment 3；
Figure 19 schematically shows the structure chart of the vision lens of embodiment 4 according to the present utility model；
Figure 20 is schematically shown to be fanned according to maximum field of view's meridian of the vision lens of the utility model embodiment 4 to light
Figure；
Figure 21 is schematically shown to be fanned according to maximum field of view's sagitta of arc of the vision lens of the utility model embodiment 4 to light
Figure；
Figure 22 schematically shows the axial chromatic aberration figure according to the vision lens of the utility model embodiment 4；
Figure 23 schematically shows the lateral chromatic aberration figure according to the vision lens of the utility model embodiment 4；
Figure 24 schematically shows the distortion figure of the vision lens according to the utility model embodiment 4.
Specific embodiment
It, below will be to implementing in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art
Attached drawing is briefly described needed in mode.It should be evident that the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type, for those of ordinary skills, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
When the embodiment for the utility model is described, term " longitudinal direction ", " transverse direction ", " on ", " under ",
"front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation expressed by " outer " or position relationship are
Based on the orientation or position relationship shown in relevant drawings, it is for only for ease of description the utility model and simplifies description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore on
Term is stated it is not intended that limitation to the utility model.
The utility model is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot herein one
One repeats, but therefore the embodiment of the utility model is not defined in implementation below.
Vision lens according to the present utility model include be arranged in order along optical axis from object side to image side the first lens group A,
Second lens group B, diaphragm S and third lens group C.In the utility model, the first lens group A forms fixed group, that is, when focusing
First lens group A is fixed.Second lens group B, diaphragm S and third lens group C form focusing group, i.e., relative to the first lens
Group A adjustment focusing group focuses to the vision lens of the utility model.In the vision lens of the utility model, the first lens
Group A is that negative-power lenses group, the second lens group B and third lens group C knock down group for positive light coke.And in the utility model
Vision lens in, the first lens group A is made of three pieces lens, and the second lens group B can be made of three to five lens,
Three lens group C are made of four lens.In addition, vision lens according to the present utility model, the first lens group A includes having positive light
The first lens 1, the second lens 2 with negative power and the third lens 3 with negative power of focal power.
A kind of embodiment according to the present utility model, when the second lens group B includes three pieces lens, the second lens group B
It can be by the 4th lens 4, the 5th lens 5 with negative power and the 6th lens with positive light coke with positive light coke
6 compositions.In the present embodiment, each power of lens may be other set-up modes in the second lens group B, as long as protecting
The whole focal power of the second lens group B is demonstrate,proved as just.
In the present embodiment, third lens group C includes the 7th lens 7 with positive light coke, with negative power
8th lens 8, the 9th lens 9 with positive light coke and the tenth lens 10 with positive light coke.
In the present embodiment, the first lens 1 and the second lens 2 form cemented doublet group, the 4th lens 4 and the 5th lens
5 form cemented doublet group.7th lens 7 and the 8th lens 8 form cemented doublet group.
Another embodiment according to the present utility model, when the second lens group B includes four lens, the second lens group
B can be by the 4th lens 4 with positive light coke, the 5th lens 5, the 6th lens 6 and the 7th lens 7 with negative power
Composition；It can also be by the 4th lens 4 with negative power and the 5th lens 5 with positive light coke, the 6th lens 6 and the 7th
Lens 7 form.Certainly, the second lens group with positive light coke formed using other focal power combinations is in this implementation
It is also feasible in mode.
In the present embodiment, third lens group C includes the 8th lens 8 with positive light coke, with negative power
9th lens 9, the tenth lens 10 with positive light coke and the 11st lens 11 with positive light coke.
In the present embodiment, the first lens 1 and the second lens 2 form cemented doublet group in the first lens group A；Third is saturating
The 8th lens 8 and the 9th lens 9 form cemented doublet group in mirror C.The 6th lens 6 are formed with the 7th lens 7 in second lens group B
Cemented doublet group or the 4th lens 4 and the 5th lens 5 form cemented doublet group.
The third embodiment according to the present utility model, when the second lens group B includes five lens, the second lens group
B can be by the 4th lens 4, the 6th lens 6 and the 7th lens 5 with positive light coke and the 5th lens with negative power
5 and the 8th lens 8 form.Certainly, the second lens group with positive light coke formed using other focal power combinations
It is in the present embodiment and feasible.
In the present embodiment, third lens group C includes the 9th lens 9 with positive light coke, with negative power
Tenth lens 10, the 11st lens 11 with positive light coke and the 12nd lens 12 with positive light coke.
In the present embodiment, the 4th lens 4 and the 5th lens 5 form cemented doublet group；7th lens 7 and the 8th lens
8 form cemented doublet group；9th lens 9 form cemented doublet group with the tenth lens 10.
Vision lens according to the present utility model use anti-structure of dolly-out,ing dolly-back, and effective focal length f forms the first of fixed group
The effective focal length of lens group A is fA, effective focal length f and effective focal length fABetween meet relational expression：- 2.5 ＜ fA/ f ＜ -1.8.
In the utility model, the effective focal length of focusing group that the second lens group B, diaphragm S and third lens group C are formed is fT, with mirror
Meet relational expression between the effective focal length f of head：1.2 ＜ fT/ f ＜ 1.6.In the utility model, group is fixed by reasonable distribution
With the focal power of focusing group, while ensureing that system has longer optic back focal, optical system distortion is effectively reduced.
The Abbe number of first lens 1 is V1, and the Abbe number of second lens meets for V2, Abbe number V1 and Abbe number V2
Relational expression：V1-V2 ＞ 16.The focal power for advantageously reducing two balsaming lens is arranged such, reduces the incidence angle of chief ray, so as to
Reduce high-order spherical aberration and assembling sensitivity.The Abbe number of third lens 3 is V3, meets relational expression：50 ＜ V3 ＜ 75.It is arranged such
The magnification error of system can be corrected.Airspace D between 3 and the 4th lens 4 of third lens34Meet relational expression：8.5 ＜
D34＜ 19.Such setting can correct the system curvature of field.The refractive index of 9th lens 9 is N9, and the Abbe number of the 9th lens is V9, and
Meet relational expression respectively：1.65 ＜ N9 ＜ 1.75 and 29 ＜ V9 ＜ 55.Such setting can correct system axial aberration.
In the utility model, the total focal length of the second lens group B is fB, the total focal length of focusing group is F, total focal length fBWith it is total
Meet relational expression between focal length F：0.8 ＜ fB/ F ＜ 1.5.The higher order aberratons of system can be reduced by being arranged such.The aperture of camera lens
Value F# meets relational expression：2 ＜ F# ＜ 2.55.Being arranged such can cause camera lens to keep higher opposite in entire field depth
Illumination.The focusing amount Δ D of camera lens meets 0.75 ＜ Δ D ＜ 1.6 of relational expression.It is arranged such and higher focusing rate can be achieved.At this
In the vision lens of utility model, lens can use full glass spheric glass.
Vision lens according to the present utility model, 3 to 5 lens compositions may be used in the second lens group B, when the second lens
B 3 lens when be made of for group, object distance range be reduced into it is infinite as far as 0.4m, with high-resolution in entire object distance range,
Can meet the needs of inexpensive simultaneously.When the second lens group B is made of 5 lens, object distance range is adjusted to infinity
To 0.15m, in entire object distance range there is high-resolution, meet the use demand of the big nearly object distance in visual field large aperture.
It is the changes in material of each lens and each relevant parameter in vision lens according to the present utility model below
Difference provides four groups of embodiments to illustrate vision lens according to the present utility model.Above-mentioned implementation according to the present utility model
No matter mode is provided with three pieces, four or five lens in the second lens group B, three groups of glue is both provided in vision lens
Lens set is closed, in addition the setting of diaphragm, optical filter and imaging surface, vision lens according to the present utility model have 21-25
Optical surface, this 21-25 optical surface are arranged in order arrangement according to the structural order of the utility model, illustrate for the ease of narration,
It is numbered according to the number of optical surface, number S1-S25.
Data in data such as the following table 1 in four groups of embodiments：
| Conditional | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| -2.5<fA/f<-1.8 | -1.90 | -2.39 | -1.98 | -1.81 |
| 1.2<fT/f<1.6 | 1.48 | 1.25 | 1.38 | 1.51 |
| V1-V2 ＞ 16 | 16.7 | 22.9 | 22.9 | 16.7 |
| 50 ＜ V3 ＜ 75 | 50.19 | 70.4 | 70.4 | 70.4 |
| 8.5<D34<19 | 18.84 | 8.93 | 17.1452 | 12.32 |
| 0.8<fB/F<1.5 | 1.46 | 1.357 | 0.99 | 1.04 |
| 1.65<N9<1.75 | 1.67 | 1.69 | - | - |
| 29<V9<55 | 32.2 | 30.05 | - | - |
| 2<F#<2.55 | 2.51 | 2.23 | 2.32 | 2.06 |
| 0.75<ΔD<1.6 | 1.04 | 0.87 | 1.51 | 0.8 |
Table 1
As shown in Table 1, in four groups of embodiment vision lens according to the present utility model parameters setting, meet basis
Requirement of the vision lens of invention for each Parameter Conditions.According to the embodiment 1 of invention, the object distance WD=400mm of vision lens,
TTL=56.75mm, EFFL=14.71mm.The field angle of vision lens is 2W=48.22 °, f-number F#=2.51, detector
Part is 2/3 inch of sensitive chip.
Following table 2 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material refractive index
And Abbe number：
Table 2
Fig. 1 schematically shows the structure chart of the vision lens of embodiment 1 according to the present utility model.As shown in Figure 1, at this
In embodiment, the second lens group B of vision lens according to the present utility model includes four lens, respectively with positive light coke
The 4th lens 4, the 5th lens 5 with positive light coke, the 6th lens 6 with positive light coke and with negative power
Seven lens 7.In the present embodiment, the first lens 1 in the first lens group A and the second lens 2 form cemented doublet group.Second thoroughly
The 6th lens 6 and the 7th lens 7 in microscope group B form cemented doublet group.8th lens 8 and the 9th lens 9 in third lens group C
Form cemented doublet group.As shown in Table 2, in the present embodiment, the setting of each lens relevant parameter meets according to the utility model
The condition requirement of vision lens.
Following table 3 lists vision lens under different object distances, the airspace between 3 and the 4th lens 4 of third lens
D34：
| Object distance (mm) | Infinity | 700 | 400 | 200 |
| D34(mm) | 15.36 | 15.06 | 14.84 | 14.32 |
Table 3
As shown in Table 3, in the present embodiment, vision lens are under different object distances, between 3 and the 4th lens 4 of third lens
Airspace D34Setting meet according to the utility model vision lens for 8.5 ＜ D of airspace34The requirement of ＜ 19.
Fig. 2-Fig. 6 schematically show respectively according to maximum field of view's meridians of the vision lens of the utility model embodiment 1 to
Light fan figure, maximum field of view's sagitta of arc fan figure, axial chromatic aberration figure, lateral chromatic aberration figure and distortion figure to light.By Fig. 2, Fig. 3 it is found that
Vision lens according to the present utility model object distance range be reduced into it is infinite as far as 400mm when, optical system is in entrance pupil position
Aberration is controlled in 0 to 5 μ m.By Fig. 4-Fig. 6 it is found that the axial chromatic aberration of optical system is controlled 0 to 8.00E-0.2mm models
In enclosing, lateral chromatic aberration is controlled between -1.50E+00 to 3.00E+00 μm.The aberration control of optical system is in -1.00% range
It is interior.Therefore, according to the vision lens of the utility model embodiment 1 in the case of with big field angle, large aperture and nearly object distance,
Still there is good optical property, imaging clearly, high resolution.
Fig. 7 schematically shows the structure chart of the vision lens of embodiment 2 according to the present utility model.
Embodiment 2 according to the present utility model, the object distance WD=400mm, TTL=57.1767mm, EFFL=of vision lens
12.207mm.The field angle of vision lens is 2W=48.44 °, aperture F#=2.23, and sensitive detection parts are 2/3 inch of sensitive chip.
Following table 4 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material refractive index
And Abbe number：
Table 4
As shown in fig. 7, in the present embodiment, the second lens group B of vision lens according to the present utility model includes four
Lens, respectively the 4th lens 4 with negative power, the 5th lens 5 with positive light coke, the with positive light coke the 6th
Lens 6 and the 7th lens 7 with negative power.In the present embodiment, the first lens 1 and second in the first lens group A are saturating
Mirror 2 forms cemented doublet group.The 4th lens 4 and the 5th lens 5 in second lens group B form cemented doublet group.Third lens
The 8th lens 8 and the 9th lens 9 form cemented doublet group in group C.As shown in Table 4, in the present embodiment, each lens relevant parameter
Setting meet according to the condition of the utility model vision lens require.
Following table 5 lists vision lens under different object distances, the airspace between 3 and the 4th lens 4 of third lens
D34：
| Object distance (mm) | Infinity | 700 | 400 | 200 |
| D34(mm) | 9.81 | 9.06 | 9.56 | 8.94 |
Table 5
As shown in Table 5, in the present embodiment, vision lens are under different object distances, between 3 and the 4th lens 4 of third lens
Airspace D34Setting meet according to the utility model vision lens for 8.5 ＜ D of airspace34The requirement of ＜ 19.
Fig. 8-Figure 12 schematically show respectively according to maximum field of view's meridians of the vision lens of the utility model embodiment 2 to
Light fan figure, maximum field of view's sagitta of arc fan figure, axial chromatic aberration figure, lateral chromatic aberration figure and distortion figure to light.By Fig. 8, Fig. 9 it is found that
Vision lens according to the present utility model object distance range be reduced into it is infinite as far as 400mm when, optical system is in entrance pupil position
Aberration is controlled in 0 to 5 μ m.By Figure 10-Figure 12 it is found that the axial chromatic aberration of optical system is controlled in-4.00E-0.2mm extremely
Between 8.00E-0.2mm, lateral chromatic aberration is controlled between -1.00E+00 μm to 3.00E+00 μm.The aberration control of optical system
In the range of -1.00%.Therefore, according to the vision lens of the utility model embodiment 2 with big field angle, large aperture and near
In the case of object distance, still with good optical property, imaging clearly, high resolution.
Figure 13 schematically shows the structure chart of the vision lens of embodiment 3 according to the present utility model.
Embodiment 3 according to the present utility model, the object distance WD=400mm, TTL=56.5mm, EFFL=of vision lens
12.402mm.The field angle of vision lens is 2W=50.4 °, aperture F#=2.32, and sensitive detection parts are 2/3 inch of sensitive chip.
Following table 6 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material refractive index
And Abbe number：
Table 6
As shown in figure 13, in the present embodiment, the second lens group B of vision lens according to the present utility model includes three pieces
Lens, the 4th lens 4 respectively with positive light coke, the 5th lens 5 with negative power and with positive light coke
Six lens 6.In the present embodiment, the first lens 1 in the first lens group A and the second lens 2 form cemented doublet group.Second thoroughly
The 4th lens 4 and the 5th lens 5 in microscope group B form cemented doublet group.8th lens 8 and the 9th lens 9 in third lens group C
Form cemented doublet group.As shown in Table 6, in the present embodiment, the setting of each lens relevant parameter meets according to the utility model
The condition requirement of vision lens.
Following table 7 lists vision lens under different object distances, the airspace between 3 and the 4th lens 4 of third lens
D34：
| Object distance (mm) | Infinity | 700 | 400 |
| D34(mm) | 17.66 | 17.37 | 16.15 |
Table 7
As shown in Table 7, in the present embodiment, vision lens are under different object distances, between 3 and the 4th lens 4 of third lens
Airspace D34Setting meet according to the utility model vision lens for 8.5 ＜ D of airspace34The requirement of ＜ 19.
Figure 14-Figure 18 schematically shows maximum field of view's meridian according to the vision lens of the utility model embodiment 3 respectively
To light fan figure, maximum field of view's sagitta of arc figure, axial chromatic aberration figure, lateral chromatic aberration figure and distortion figure are fanned to light.By Figure 14, Tu15Ke
Know, vision lens according to the present utility model object distance range be reduced into it is infinite as far as 400mm when, optical system is in entrance pupil position
Aberration control in 0 to 4 μ m.By Figure 16-Figure 18 it is found that the axial chromatic aberration of optical system is controlled in-5.00E-0.2mm
To between 5.00E-0.2mm, lateral chromatic aberration is controlled between -1.00E+00 μm to 2.00E+00 μm.The distortion control of optical system
System is in the range of -2.00%.Therefore, according to setting three in the second lens group of vision lens B of the utility model embodiment 3 thoroughly
It during mirror, in entire object distance range, can equally ensure high resolution ratio, meet in big field angle, large aperture and nearly object distance
In the case of requirement.
Figure 19 schematically shows the structure chart of the vision lens of embodiment 4 according to the present utility model.
Embodiment 4 according to the present utility model, the object distance WD=400mm, TTL=58.5mm, EFFL=of vision lens
12.05mm.The field angle of vision lens is 2W=48.64 °, aperture F#=2.06, and sensitive detection parts are 2/3 inch of sensitive chip.
Following table 8 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material refractive index
And Abbe number：
Table 8
As shown in figure 19, in the present embodiment, the second lens group B of vision lens according to the present utility model includes five
Lens, respectively the 4th lens 4 with positive light coke, the 5th lens 5 with negative power, the with positive light coke the 6th
Lens 6, the 7th lens 7 with positive light coke and the 8th lens 8 with negative power.In the present embodiment, the second lens
The 4th lens 4 and the 5th lens 5 in group B form cemented doublet group, and the 7th lens 7 and the 8th lens 8 form cemented doublet group.
The 8th lens 9 and the 9th lens 10 form cemented doublet group in third lens group C.As shown in Table 8, in the present embodiment, it is each
The setting of mirror relevant parameter meets to be required according to the condition of the utility model vision lens.
Following table 9 lists vision lens under different object distances, the airspace between 3 and the 4th lens 4 of third lens
D34：
| Object distance (mm) | 900 | 700 | 400 | 200 | 150 |
| D34(mm) | 12.61 | 12.54 | 12.32 | 11.81 | 11.46 |
Table 9
As shown in Table 9, in the present embodiment, vision lens are under different object distances, between 3 and the 4th lens 4 of third lens
Airspace D34Setting meet according to the utility model vision lens for 8.5 ＜ D of airspace34The requirement of ＜ 19.
Figure 20-Figure 24 schematically shows maximum field of view's meridian according to the vision lens of the utility model embodiment 4 respectively
To light fan figure, maximum field of view's sagitta of arc figure, axial chromatic aberration figure, lateral chromatic aberration figure and distortion figure are fanned to light.By Figure 20, Tu21Ke
Know, for vision lens according to the present utility model when object distance range is reduced into 900mm to 150mm, optical system is in entrance pupil position
Aberration control in 0 to 5 μ m.By Figure 22-Figure 24 it is found that the axial chromatic aberration of optical system is controlled in-3.50E-0.2mm
To between 7.00E-0.2mm, lateral chromatic aberration is controlled between -2.50E+00 μm to 2.50E+00 μm.The distortion control of optical system
System is in the range of -1.00%.Therefore, according to setting five in the second lens group of vision lens B of the utility model embodiment 4 thoroughly
It during mirror, in entire object distance range, can equally ensure high resolution ratio, meet in big field angle, large aperture and nearly object distance
In the case of requirement.
The above is only enumerating for the concrete scheme of the utility model, for the equipment and knot of wherein not detailed description
Structure, it should be understood that the existing common apparatus in this field and universal method is taken to be practiced.
The foregoing is merely a schemes of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it
Interior, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (19)
1. a kind of vision lens, which is characterized in that including：The of the fixed group of composition being arranged in order along optical axis from object side to image side
One lens group (A) and the second lens group (B), diaphragm (S) and the third lens group (C) for forming focusing group；
First lens group (A) is negative-power lenses group；
Second lens group (B) and the third lens group (C) are positive power lens group；
First lens group (A) is made of three pieces lens；
Second lens group (B) includes at least three pieces lens；
The third lens group (C) is made of four lens.
2. vision lens according to claim 1, which is characterized in that first lens group (A) is including having positive light focus
The first lens (1), the second lens (2) with negative power and the third lens (3) with negative power of degree.
3. vision lens according to claim 2, which is characterized in that when second lens group (B) is including three pieces lens,
Second lens group (B) includes the 4th lens (4), the 5th lens (5) and the 6th lens (6)；
The third lens group (C) including the 7th lens (7) with positive light coke, the 8th lens (8) with negative power,
The 9th lens (9) with positive light coke and the tenth lens (10) with positive light coke.
4. vision lens according to claim 3, which is characterized in that first lens (1) and second lens (2)
Form cemented doublet group；
4th lens (4) form cemented doublet group with the 5th lens (5)；
7th lens (7) form cemented doublet group with the 8th lens (8).
5. vision lens according to claim 2, which is characterized in that when second lens group (B) is including four lens,
Second lens group (B) includes the 4th lens (4), the 5th lens (5), the 6th lens (6) and the 7th lens (7)；
The third lens group (C) including the 8th lens (8) with positive light coke, the 9th lens (9) with negative power,
The tenth lens (10) with positive light coke and the 11st lens (11) with positive light coke.
6. vision lens according to claim 5, which is characterized in that first lens (1) and second lens (2)
Form cemented doublet group；
6th lens (6) form cemented doublet group with the 7th lens (7)；
8th lens (8) form cemented doublet group with the 9th lens (9).
7. vision lens according to claim 5, which is characterized in that first lens (1) and second lens (2)
Form cemented doublet group；
4th lens (4) form cemented doublet group with the 5th lens (5)；
8th lens (8) form cemented doublet group with the 9th lens (9).
8. vision lens according to claim 2, which is characterized in that when second lens group (B) is including five lens,
Second lens group (B) is saturating including the 4th lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th
Mirror (8)；
The third lens group (C) includes the 9th lens (9), the tenth lens with negative power with positive light coke
(10), the 11st lens (11) with positive light coke and the 12nd lens (12) with positive light coke.
9. vision lens according to claim 8, which is characterized in that the 4th lens (4) and the 5th lens (5)
Form cemented doublet group；
7th lens (7) form cemented doublet group with the 8th lens (8)；
9th lens (9) form cemented doublet group with the tenth lens (10).
10. the vision lens according to one of claim 1 to 9, which is characterized in that the camera lens takes the photograph remote structure using counter,
Its effective focal length is f, and the effective focal length for forming first lens group (A) of fixed group is fA, effective focal length f and effective focal length
fABetween meet relational expression：- 2.5 ＜ fA/ f ＜ -1.8.
11. the vision lens according to one of claim 1 to 9, which is characterized in that second lens group (B), the light
The effective focal length of the focusing group that late (S) and the third lens group (C) are formed is fT, the effective focal length with the camera lens
Meet relational expression between f：1.2 ＜ fT/ f ＜ 1.6.
12. the vision lens according to one of claim 2 to 9, which is characterized in that the Abbe number of first lens (1)
For V1, the Abbe number of second lens (2) meets relational expression for V2, Abbe number V1 and Abbe number V2：V1-V2 ＞ 16.
13. the vision lens according to one of claim 2 to 9, which is characterized in that the Abbe number of the third lens (3)
For V3, meet relational expression：50 ＜ V3 ＜ 75.
14. the vision lens according to one of claim 7 to 9, which is characterized in that the third lens (3) and described
Airspace D between four lens (4)34Meet relational expression：8.5 ＜ D34＜ 19.
15. the vision lens according to one of claim 1 to 9, which is characterized in that total coke of second lens group (B)
Away from for fB, the total focal length of the focusing group is F, total focal length fBMeet relational expression between total focal length F：0.8 ＜ fB/ F ＜ 1.5.
16. the vision lens according to one of claim 5 to 9, which is characterized in that the refractive index of the 9th lens (9)
For N9, meet relational expression：1.65 ＜ N9 ＜ 1.75；
The Abbe number of 9th lens (9) is V9, meets relational expression：29 ＜ V9 ＜ 55.
17. the vision lens according to one of claim 1 to 9, which is characterized in that the aperture F# of the camera lens meets relationship
Formula：2 ＜ F# ＜ 2.55.
18. the vision lens according to one of claim 1 to 9, which is characterized in that the focusing amount Δ D of the camera lens meets
0.75 ＜ Δ D ＜ 1.6 of relational expression.
19. the vision lens according to one of claim 1 to 9, which is characterized in that the lens use full glass spherical surface
Eyeglass.
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