CN107608051A - Machine visual lens - Google Patents
Machine visual lens Download PDFInfo
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- CN107608051A CN107608051A CN201710846357.5A CN201710846357A CN107608051A CN 107608051 A CN107608051 A CN 107608051A CN 201710846357 A CN201710846357 A CN 201710846357A CN 107608051 A CN107608051 A CN 107608051A
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- 230000000007 visual effect Effects 0.000 title claims abstract description 106
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000005308 flint glass Substances 0.000 claims description 7
- 238000003384 imaging method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims 2
- 230000004075 alteration Effects 0.000 abstract description 25
- 239000000463 material Substances 0.000 description 11
- 238000009738 saturating Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 6
- 230000004438 eyesight Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000000571 coke Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The present invention relates to a kind of machine visual lens, including：The front lens group being arranged in order along optical axis from thing side to image side, diaphragm and rear lens group；The front lens group is made up of the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens being arranged in order along optical axis from thing side to image side；The rear lens group is made up of the 7th lens, the 8th lens, the 9th lens, the tenth lens, the 11st lens, the 12nd lens, the 13rd lens and the 14th lens being arranged in order along optical axis from thing side to image side；4th lens and the 5th lens form cemented doublet group；Two cemented doublet groups are comprised at least in the rear lens group.According to the machine visual lens of the present invention have small aberration, low distortion, the angle of visual field is wide, operating distance scope is wide, focusing efficiency high, without thermalization and rear burnt susceptibility it is low the characteristics of.
Description
Technical field
The present invention relates to a kind of machine visual lens, more particularly to a kind of machine vision mirror being made up of 14 lens
Head.
Background technology
Machine vision is fast-developing branch of artificial intelligence, and briefly, machine vision is exactly to use machine generation
Measure and judge for human eye.NI Vision Builder for Automated Inspection be by machine vision product (and image-pickup device, divide CMOS and
Two kinds of CCD) target will be ingested it is converted into picture signal, send special image processing system to, obtain the shape of target subject
State information, according to the information such as pixel distribution and brightness, color, it is transformed into digitized signal；Picture system is carried out to these signals
Clarification of objective is extracted in various computings, and then controls the device action at scene according to the result of differentiation.
At present, machine visual lens on the market, such as Patent No. " CN203745710U " patent, the visual field of the system
Angle is 33.2 °, and focusing field range is narrower；Focusing amount 6.17-8.72mm, focusing efficiency are low；And for example Patent No.
The patent of " CN101266331 ", the close-up lens comprise at least two it is aspherical and two focusing structures, cost are higher.As specially
The patent of sharp number " CN205958826U ", the system do not have focusing structure, it is impossible to which different object distances are focused.
Meanwhile existing machine visual lens exist with aberration, without thermalization effect is poor, operating distance scope is narrower and
Problems, these problems such as burnt susceptibility is higher afterwards are all urgently to be resolved hurrily.
The content of the invention
It is an object of the present invention to provide a kind of aberration it is small, without thermalization and possess it is low distortion performance machine vision mirror
Head.
It is another object of the present invention to provide a kind of big angle of visual field, operating distance scope is wide, focusing efficiency high and after
The low machine visual lens of burnt susceptibility.
For achieving the above object, the present invention provides a kind of machine visual lens, including：Along optical axis from thing side to image side
The front lens group being arranged in order, diaphragm and rear lens group；
The front lens group by be arranged in order along optical axis from thing side to image side the first lens, the second lens, the 3rd lens,
4th lens, the 5th lens and the 6th lens composition；
The rear lens group by be arranged in order along optical axis from thing side to image side the 7th lens, the 8th lens, the 9th lens,
Tenth lens, the 11st lens, the 12nd lens, the 13rd lens and the 14th lens composition；
4th lens and the 5th lens form cemented doublet group；
Two cemented doublet groups are comprised at least in the rear lens group.
According to an aspect of the present invention, the front lens group is fixedly installed relative to the imaging surface of the camera lens, described
Diaphragm and the rear lens group can be done relative to the front lens group while linear movement in the same direction.
According to an aspect of the present invention, along the direction of thing side to image side, first lens and second lens
It is concave-convex lens.
According to an aspect of the present invention, the focal length of first lens is f1, and the focal lengths of second lens is f2, institute
State the focal length f1 and focal length f2 and the focal length fAMeet relationship below respectively：
0.4<f1/fA<1.0；
-0.43<f2/fA<-0.15。
According to an aspect of the present invention, the front lens group and the rear lens group are positive power lens group.
According to an aspect of the present invention, the 7th lens, the 9th lens, the tenth lens, the described tenth
Two lens and the 14th lens are positive power lens；
Second lens, the 3rd lens, the 4th lens, the 8th lens and the 13rd lens are
Negative-power lenses；
11st lens are positive power lens or negative-power lenses.
According to an aspect of the present invention, the rear lens group includes two cemented doublet groups；
Wherein, the 8th lens and the 9th lens form cemented doublet group；
12nd lens and the 13rd lens form cemented doublet group.
According to an aspect of the present invention, the rear lens group includes three cemented doublet groups；
Wherein, the 8th lens and the 9th lens form cemented doublet group；
Tenth lens and the 11st lens form cemented doublet group；
12nd lens and the 13rd lens form cemented doublet group.
According to an aspect of the present invention, the focal length of the front lens group is fA, the focal length of the rear lens group is fB, it is burnt
Away from fAWith focal length fBBetween meet relational expression：2.0<fA/fB<4.85。
According to an aspect of the present invention, the refractive index of the 4th lens is nd4, Abbe number vd4, and meet with
Lower relational expression：
1.85<nd4<1.95；
18<vd4<25。
According to an aspect of the present invention, the refractive index of the 5th lens is nd5, Abbe number vd5, and meet with
Lower relational expression：
1.75<nd5<1.90；
20<vd5<25。
According to an aspect of the present invention, the refractive index of the 12nd lens is nd12, Abbe number vd12, and full
Sufficient relationship below：
1.68<nd12<1.80；
48.0<vd12<57.5。
According to an aspect of the present invention, the refractive index of the 13rd lens is nd13, Abbe number vd13, and full
Sufficient relationship below：
1.90<nd13<2.0；
17<vd13<21。
According to an aspect of the present invention, at least two panels lens are fluor crown, at least two in the rear lens group
Piece lens are dense flint glass.
According to an aspect of the present invention, the 7th lens and the 9th lens are fluor crown, and the described 8th is saturating
Mirror and the tenth lens are dense flint glass.
According to an aspect of the present invention, the displacement of the rear lens group is d, and it meets relational expression：0.45mm<d<
0.65mm。
According to an aspect of the present invention, the f-number of the camera lens is 2.0.
According to the machine visual lens of the present invention, the first lens with positive light coke in front lens group and with negative light
Power second lens, systematical distortion correction is contributed.The 4th lens and the 5th lens form cemented doublet in front lens group
Group, two cemented doublet groups are comprised at least in rear lens group B, are advantageous to correcting chromatic aberration.Diaphragm be arranged on front lens group and it is rear thoroughly
Between microscope group so that the number of lenses relative symmetry before and after diaphragm, front lens group are fixedly installed relative to image planes, diaphragm with it is rear thoroughly
Microscope group can move in the same direction simultaneously, can correct the off-axis aberration that object distance change is brought, can be with very little in object distance change procedure
Displacement ensure that focusing is clear, and then focusing efficiency is improved.This structure setting ensure that machine vision mirror simultaneously
Head has sufficient back focal length, in the case where rigging error allows, ensures blur-free imaging.
According to the machine visual lens of the present invention, rear lens group uses above-mentioned symmetrical structure, including five or six
Positive power lens, and three or two panels negative-power lenses, wherein at least including two by positive power lens and negative
The cemented doublet of power lenses composition, being capable of effectively spherical aberration corrector, aberration, distortion and vertical axial aberration.In addition, rear lens group
In at least material of the 7th lens and the 9th lens be fluor crown, at least the material of the 8th lens and the tenth lens is dense flint
Glass.Due to fluor crown and the special refractive index temperature characteristic of dense flint glass, ensure in effectively correction optical system aberration
While, also solve the problems, such as, because temperature reason causes optical system imaging face to produce drift, to realize optical system well
System without thermalization.
Brief description of the drawings
Fig. 1 schematically shows the structure chart of the machine visual lens according to one embodiment of the present invention；
Fig. 2 schematically shows the normal of the machine visual lens of the first embodiment specific embodiment 1 according to the present invention
Warm defocusing curve figure；
Fig. 3 schematically shows the low of the machine visual lens of the first embodiment specific embodiment 1 according to the present invention
Warm -30 DEG C of defocusing curve figures；
Fig. 4 schematically shows the height of the machine visual lens of the first embodiment specific embodiment 1 according to the present invention
Warm 70 DEG C of defocusing curve figures；
Fig. 5 schematically shows the abnormal of the machine visual lens of the first embodiment specific embodiment 1 according to the present invention
Become figure；
Fig. 6 schematically shows the normal of the machine visual lens of the first embodiment specific embodiment 2 according to the present invention
Warm defocusing curve figure；
Fig. 7 schematically shows the low of the machine visual lens of the first embodiment specific embodiment 2 according to the present invention
Warm -30 DEG C of defocusing curve figures；
Fig. 8 schematically shows the height of the machine visual lens of the first embodiment specific embodiment 2 according to the present invention
Warm 70 DEG C of defocusing curve figures；
Fig. 9 schematically shows the abnormal of the machine visual lens of the first embodiment specific embodiment 2 according to the present invention
Become figure；
Figure 10 schematically shows the normal of the machine visual lens of the first embodiment specific embodiment 3 according to the present invention
Warm defocusing curve figure；
Figure 11 schematically shows the low of the machine visual lens of the first embodiment specific embodiment 3 according to the present invention
Warm -30 DEG C of defocusing curve figures；
Figure 12 schematically shows the height of the machine visual lens of the first embodiment specific embodiment 3 according to the present invention
Warm 70 DEG C of defocusing curve figures；
Figure 13 schematically shows the abnormal of the machine visual lens of the first embodiment specific embodiment 3 according to the present invention
Become figure；
Figure 14 is schematically shown according to the normal of the machine visual lens of another embodiment of the invention specific embodiment 4
Warm defocusing curve figure；
Figure 15 is schematically shown according to the low of the machine visual lens of another embodiment of the invention specific embodiment 4
Warm -30 DEG C of defocusing curve figures；
Figure 16 schematically shows the height of the machine visual lens according to another embodiment of the invention specific embodiment 4
Warm 70 DEG C of defocusing curve figures；
Figure 17 is schematically shown according to the abnormal of the machine visual lens of another embodiment of the invention specific embodiment 4
Become figure；
Figure 18 is schematically shown according to the normal of the machine visual lens of another embodiment of the invention specific embodiment 5
Warm defocusing curve figure；
Figure 19 is schematically shown according to the low of the machine visual lens of another embodiment of the invention specific embodiment 5
Warm -30 DEG C of defocusing curve figures；
Figure 20 schematically shows the height of the machine visual lens according to another embodiment of the invention specific embodiment 5
Warm 70 DEG C of defocusing curve figures；
Figure 21 is schematically shown according to the abnormal of the machine visual lens of another embodiment of the invention specific embodiment 5
Become figure.
Embodiment
, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical scheme of the prior art
In the required accompanying drawing used be briefly described.It should be evident that drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skills, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ",
" rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation expressed by " outer " or position relationship are to be based on phase
Orientation shown in the drawings or position relationship are closed, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore above-mentioned term can not
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment can not go to live in the household of one's in-laws on getting married one by one herein
State, but therefore embodiments of the present invention are not defined in implementation below.
Fig. 1 is the structure chart for schematically showing the machine visual lens according to one embodiment of the present invention.Such as Fig. 1 institutes
Show, include the front lens group A being arranged in order, the diaphragm S along optical axis from the object side to image side according to the machine visual lens of the present invention
And rear lens group B.In the present embodiment, as shown in figure 1, front lens group A is by being arranged successively along optical axis from thing side to image side
What the first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5 and the 6th lens 6 of row formed, rear lenses
Group B is then the 7th lens 7, the 8th lens 8, the 9th lens 9, the tenth lens by being arranged in order along optical axis from thing side to image side
10th, the 11st lens 11, the 12nd lens 12, the 13rd lens 13 and the 14th lens 14 form.In the present embodiment,
The 4th lens 4 and the 5th lens 5 form cemented doublet group in front lens group A, and two cemented doublets are comprised at least in rear lens group B
Group.Be arranged such can cause according to the present invention machine visual lens aberration is small, effect without thermalization is more preferable, be provided simultaneously with low
Distort performance.
In the present embodiment, front lens group A is fixedly installed relative to the imaging surface of camera lens, diaphragm S and rear lens group B phases
It can be done for front lens group A while linear movement in the same direction.Movably distance is d, 0.45mm to rear lens group B<d<0.65mm.
According to the machine visual lens of the present invention, diaphragm S is arranged between front lens group A and rear lens group B, front lens group
Include six-element lens in A altogether, the 4th lens 4 and the 5th lens 5 form cemented doublet group, include eight altogether in rear lens group B
Piece lens, including at least two cemented doublet groups so that the number of lenses relative symmetry before and after diaphragm S, be advantageous to correcting chromatic aberration.
Front lens group A is fixedly installed relative to image planes, and diaphragm S and rear lens group B can be moved in the same direction simultaneously, can correct object distance change band
The off-axis aberration come, in object distance change procedure, it can ensure that focusing is clear with the displacement of very little, and then cause focusing effect
Rate improves.This structure setting ensure that machine visual lens have sufficient back focal length simultaneously, in the feelings that rigging error allows
Under condition, ensure blur-free imaging.
As shown in figure 1, in the present embodiment, the first lens 1, the 5th lens 5, the 6th lens 6, the 7th lens 7 the 9th
Lens 9, the tenth lens 10, the 12nd lens 12 and the 14th lens 14 are positive power lens.Second lens 2, the 3rd lens
3rd, the 4th lens 4, the 8th lens 8 and the 13rd lens 13 are negative-power lenses.11st lens 11 can be positive light coke
Lens or negative-power lenses.It is the lens with positive light coke according to the front lens group A of the present invention and rear lens group B
Group, wherein front lens group A focal length are fA, rear lens group B focal length is fB, focal length fAWith focal length fBBetween meet：2.0<fA/fB
<4.85.It is arranged such the distortion for being advantageous to correct machine visual lens.
As shown in figure 1, according to the machine visual lens of the present invention, along the direction of optical axis from the object side to image side, front lens
The first lens 1 and the second lens 2 in group A, are concave-convex lens.Wherein the focal length of the first lens 1 is f1, the second lens 2
Focal length is f2, focal length f1 and focal length f2 and front lens group A focal length fAMeet relational expression 0.4 respectively<f1/fA<1.0 and -0.43<
f2/fA<-0.15.According to the setting of the first lens 1 of the present invention and the second lens 2, it is possible to achieve the big of machine visual lens regards
Rink corner, be advantageous to the seizure shooting of wide angle image.
As shown in figure 1, in the present embodiment, according to the machine visual lens of the present invention, the 4th in front lens group A is saturating
The lens 5 of mirror 4 and the 5th form cemented doublet group.The refractive index of 4th lens 4 is nd4, Abbe number vd4, and meets relation
Formula 1.85<nd4<1.95 with 18<vd4<25.The refractive index of 5th lens 5 is nd5, Abbe number vd5, and is met with ShiShimonoseki
It is formula 1.75<nd5<1.9 and 20<vd5<25.In the present embodiment, the 8th lens 8 and the structure of the 9th lens 9 in rear lens group B
Into glued lens set, the 12nd lens 12 and the 13rd lens 13 form cemented doublet group.The refractive index of 12nd lens 12 is
Nd12, Abbe number vd12, and meet relational expression 1.68<nd12<1.80 with 48.0<vd12<57.5.13rd lens 13
Refractive index is nd13, Abbe number vd13, and meets relational expression 1.90<nd13<2.0 and 17<vd13<21.
According to another embodiment of the invention, 3 cemented doublet groups are included in rear lens group B, wherein the 8th is saturating
The lens 9 of mirror 8 and the 9th form cemented doublet group, and the tenth lens 10 and the 11st lens 11 form cemented doublet group, and the 12nd is saturating
The lens 13 of mirror 12 and the 13rd form cemented doublet group.The wherein refractive index of the 12nd lens 12 is nd12, Abbe number vd12,
And meet relationship below 1.68<nd12<1.80 with 48.0<vd12<57.5.The refractive index of 13rd lens 13 is nd13,
Abbe number is vd13, and meets relationship below 1.90<nd13<2.0 and 17<vd13<21.
According to the machine visual lens of the present invention, rear lens group B includes five or six positive power lens, and
Three or two panels negative-power lenses, i.e. the 11st power of lens can change, and positive light coke is either negative
Focal power, wherein the 8th lens 8 and the 9th lens 9 form cemented doublet group, the 12nd lens 12 and the 13rd lens 13 are formed
Cemented doublet group so that rear lens group B is in integrally symmetrical structure, and this symmetrical structure is the center both ends based on rear lens group
Structure it is roughly the same, such structure being capable of effectively spherical aberration corrector, distortion and vertical axial aberration.In addition, in rear lens group B extremely
The material of few 7th lens 7 and the 9th lens 9 is fluor crown, and at least material of the 8th lens 8 and the tenth lens 10 is attached most importance to fire
Stone glass.Due to fluor crown and the special refractive index temperature characteristic of dense flint glass, ensure in effectively correction optical system color
While poor, also solve the problems, such as, because temperature reason causes optical system imaging face to produce drift, to realize optics well
System without thermalization.
It is the changes in material of each lens of the first embodiment according to the present invention and each relevant parameter below
Difference provides three groups of embodiments to illustrate the machine visual lens according to the present invention.According to the first embodiment party of the present invention
Formula, the 4th lens and the 5th lens form cemented doublet group in front lens group A, and rear lens group B includes two cemented doublet groups,
Wherein the 8th lens 8 and the 9th lens 9 form cemented doublet group, and the 12nd lens 12 and the 13rd lens 13 form cemented doublet
Group.So 14 lens share 26 faces.This 26 faces are arranged in order arrangement according to the structural order of the present invention, for the ease of
Narration explanation, it is S1 to S26 by 26 face numberings.
Data in data such as table 1 below in three groups of embodiments：
Table 1
According to an embodiment of the invention 1, as shown in Table 1, preceding group of lens A focal length fAWith rear group of lens B focal length fBBetween
Meet fA/fB=2.01.The focal length f1 of first lens 1 and preceding group of lens A focal length fABetween meet f1/fA=0.93.Second is saturating
The focal length f2 of mirror 2 and preceding group of lens A focal length fABetween meet f2/fA=-0.43.
Distances of the diaphragm S apart from front lens group A when table 2 below lists different object distances：
| Object distance (mm) | Infinity | 1000 | 400 | 100 |
| dst | 10.62 | 10.55 | 10.45 | 10 |
Table 2
In the present embodiment, the focal length of each lens is f1=30.31mm, f2=-13.98mm, f3 in machine visual lens
=-11.95mm, f4=-7.50mm, f5=8.83mm, f6=17.44mm, f7=28.49mm, f8=-6.53mm, f9=
15.40mm, f10=11.09mm, f11=-140.36mm, f12=12.92mm, f13=-6.50mm, f14=12.32mm.Machine
Every optical system parameter of device vision lenses is as follows:Object distance is 0.4m, and overall length is 59mm in optical system, and system focal length is
8.2mm, f-number 2.0, the diagonally opposed angle of visual field are 70 °, and sensitive chip is 2/3 " sensitive chip.As shown in Table 2, in this reality
Apply in example, diaphragm S and front lens group A distance is 10.45mm.
Table 3 below lists the relevant parameter of each lens, includes the refractive index of surface type, radius of curvature, thickness, material
And Abbe number：
Table 3
In the present embodiment, reference picture 1, the 4th lens 4 and the 5th lens 5 form cemented doublet group in front lens group A, after
The 8th lens 8 and the 9th lens 9 form cemented doublet group in lens group B, and the 12nd lens 12 and the 13rd lens 13 form glue
Close lens set.As shown in Table 3, in the present embodiment, the lensed thing side of machine visual lens institute and image side surface are sphere.
As shown in Table 3, the 4th lens 4, the 5th lens 5, the 12nd lens 12 and the 13rd lens in cemented doublet group
13 refractive index and Abbe number meets the related request of the machine visual lens according to the present invention.
Fig. 2-Fig. 5 is to schematically show that 1 machine visual lens are in normal temperature ,-30 DEG C of low temperature, height according to an embodiment of the invention
Defocusing curve figure and distortion figure when warm 70 DEG C.As can be seen from Figure, the f-number of machine visual lens is 2.0, working substance
Away from for 400mm when, in the case of 70 DEG C of normal temperature, -30 DEG C of low temperature and high temperature camera lens defocus (i.e. the focal depth range of camera lens) control
In the range of -0.006mm to 0.006mm, the aberration rate of camera lens is controlled in the range of -4%.As can be seen here, according to the present invention
The machine visual lens of embodiment 1, in the case of realizing the big angle of visual field, wide operating range and high focusing efficiency, extremely low and
At high temperature, still can guarantee that high resolving power, realize machine visual lens without thermalization.Simultaneously lens distortion rate compared with
It is low, it ensure that image planes are clear, undistorted.
According to an embodiment of the invention 2, as shown in Table 1, preceding group of lens A focal length fAWith rear group of lens B focal length fBBetween
Meet fA/fB=2.2.The focal length f1 of first lens 1 and preceding group of lens A focal length fABetween meet f1/fA=0.97.Second is saturating
The focal length f2 of mirror 2 and preceding group of lens A focal length fABetween meet f2/fA=-0.41.
Distances of the diaphragm S apart from front lens group A when table 4 below lists different object distances：
| Object distance (mm) | Infinity | 1000 | 400 | 100 |
| dst(mm) | 10.90 | 10.83 | 10.72 | 10.26 |
Table 4
In the present embodiment, the focal length of each lens is f1=33.88mm, f2=-14.43mm, f3 in machine visual lens
=-13.04mm, f4=-9.27mm, f5=10.84mm, f6=18.75mm, f7=21.15mm, f8=-5.99mm, f9=
15.31mm, f10=12.88mm, f11=66.22mm, f12=26.68mm, f13=-9.29mm, f14=13.67mm.Machine
Every optical system parameter of vision lenses is as follows:Object distance is 0.4m, and overall length is 59mm in optical system, and system focal length is
8.3mm, f-number 2.3, the diagonally opposed angle of visual field are 70 °, and sensitive chip is 2/3 " sensitive chip.As shown in Table 4, in this reality
Apply in example, diaphragm S and front lens group A distance is 10.72mm.
Table 5 below lists the relevant parameter of each lens, includes the refractive index of surface type, radius of curvature, thickness, material
And Abbe number：
Table 5
In the present embodiment, reference picture 1, the 4th lens 4 and the 5th lens 5 form cemented doublet group in front lens group A, after
The 8th lens 8 and the 9th lens 9 form cemented doublet group in lens group B, and the 12nd lens 12 and the 13rd lens 13 form glue
Close lens set.As shown in Table 5, in the present embodiment, the lensed thing side of machine visual lens institute and image side surface are sphere.
As shown in Table 5, the 4th lens 4, the 5th lens 5, the 12nd lens 12 and the 13rd lens in cemented doublet group
13 refractive index and Abbe number meets the related request of the machine visual lens according to the present invention.
Fig. 6-Fig. 9 be schematically show according to an embodiment of the invention 2 machine visual lens normal temperature ,-30 DEG C of low temperature,
Defocusing curve figure and distortion figure during 70 DEG C of high temperature.As can be seen from Figure, the f-number of machine visual lens is 2.3, work
When object distance is 400mm, defocus (i.e. the focal depth range of the camera lens) control of camera lens in the case of 70 DEG C of normal temperature, -30 DEG C of low temperature and high temperature
In the range of -0.006mm to 0.006mm, the aberration rate of camera lens controls in the range of -2% system.As can be seen here, according to this hair
The machine visual lens of bright embodiment 2, in the case of realizing the big angle of visual field, wide operating range and high focusing efficiency, equally exist
At extremely low and high temperature, still can guarantee that high resolving power, realize machine visual lens without thermalization.Lens distortion simultaneously
Rate is relatively low, ensure that image planes are clear, undistorted.
According to an embodiment of the invention 3, as shown in Table 1, preceding group of lens A focal length fAWith rear group of lens B focal length fBBetween
Meet fA/fB=4.45.The focal length f1 of first lens 1 and preceding group of lens A focal length fABetween meet f1/fA=0.55.Second is saturating
The focal length f2 of mirror 2 and preceding group of lens A focal length fABetween meet f2/fA=-0.19.
Distances of the diaphragm S apart from front lens group A when table 6 below lists different object distances：
| Object distance (mm) | Infinity | 1000 | 400 | 100 |
| dst(mm) | 9.723 | 9.662 | 9.574 | 9.185 |
Table 6
In the present embodiment, the focal length of each lens is f1=36.79mm, f2=-12.97mm, f3 in machine visual lens
=-16.03mm, f4=-8.27mm, f5=10.54mm, f6=19.04mm, f7=32.17mm, f8=-5.84mm, f9=
12.05mm, f10=9.94mm, f11=-72.07mm, f12=10.44mm, f13=-5.84mm, f14=12.13mm.Machine
Every optical system parameter of vision lenses is as follows:Object distance is 0.4m, and overall length is 59mm in optical system, and system focal length is
8.0mm, f-number 2.4, the diagonally opposed angle of visual field are 78 °, and sensitive chip is 2/3 " sensitive chip.As shown in Table 6, in this reality
Apply in example, diaphragm S and front lens group A distance is 9.574mm.
Table 7 below lists the relevant parameter of each lens, includes the refractive index of surface type, radius of curvature, thickness, material
And Abbe number：
Table 7
In the present embodiment, reference picture 1, the 4th lens 4 and the 5th lens 5 form cemented doublet group in front lens group A, after
The 8th lens 8 and the 9th lens 9 form cemented doublet group in lens group B, and the 12nd lens 12 and the 13rd lens 13 form glue
Close lens set.As shown in Table 7, in the present embodiment, the lensed thing side of machine visual lens institute and image side surface are sphere.
As shown in Table 7, the 4th lens 4, the 5th lens 5, the 12nd lens 12 and the 13rd lens in cemented doublet group
13 refractive index and Abbe number meets the related request of the machine visual lens according to the present invention.
Figure 10-Figure 13 is to schematically show according to an embodiment of the invention 3 machine visual lens in normal temperature, low temperature-30
DEG C, 70 DEG C of high temperature when defocusing curve figure and distortion figure.As can be seen from Figure, the f-number of machine visual lens is 2.4, work
When to make object distance be 400mm, the defocus (i.e. the focal depth range of camera lens) of camera lens in the case of 70 DEG C of normal temperature, -30 DEG C of low temperature and high temperature
In the range of -0.006mm to 0.006mm, the aberration rate of camera lens is controlled in the range of -4% for control.As can be seen here, according to this
Invent the machine visual lens of the 5th kind of embodiment equally have aberration it is small, without thermalization, aberration rate is low and the angle of visual field is wider,
Operating distance scope is wider.
It is the changes in material according to each lens of another embodiment of the invention and each relevant parameter below
Difference provides two groups of embodiments to illustrate the machine visual lens according to the present invention.According to another embodiment party of the present invention
Formula, the 4th lens and the 5th lens form cemented doublet group in front lens group A, and rear lens group B includes three cemented doublet groups,
Wherein the 8th lens 8 and the 9th lens 9 form cemented doublet group, and the tenth lens 10 and the 11st lens 11 form glued film
Group, the 12nd lens 12 and the 13rd lens 13 form cemented doublet group.So 14 lens share 25 faces.This 25 faces
Structural order according to the present invention is arranged in order arrangement, illustrates for the ease of narration, is S1 to S25 by 25 face numberings.
Data in data such as table 8 below in two groups of embodiments：
| Conditional | Embodiment 4 | Embodiment 5 |
| fA/fB | 4.47 | 4.82 |
| f1/fA | 0.42 | 0.49 |
| f2/fA | -0.19 | -0.21 |
| nd4 | 1.92 | 1.92 |
| vd4 | 18.90 | 18.90 |
| nd5 | 1.85 | 1.85 |
| vd5 | 24.80 | 24.80 |
| nd12 | 1.70 | 1.73 |
| vd12 | 55.53 | 54.67 |
| nd13 | 1.92 | 1.95 |
| vd13 | 20.88 | 17.94 |
| D | 0.593 | 0.458 |
Table 8
According to an embodiment of the invention 4, as shown in Table 8, preceding group of lens A focal length fAWith rear group of lens B focal length fBBetween
Meet fA/fB=4.47.The focal length f1 of first lens 1 and preceding group of lens A focal length fABetween meet f1/fA=0.42.Second is saturating
The focal length f2 of mirror 2 and preceding group of lens A focal length fABetween meet f2/fA=-0.19.
Distances of the diaphragm S apart from front lens group A when table 9 below lists different object distances：
| Object distance (mm) | Infinity | 1000 | 400 | 100 |
| dst(mm) | 13.083 | 13.023 | 12.923 | 12.49 |
Table 9
In the present embodiment, the focal length of each lens is f1=29.48mm, f2=-13.41mm, f3 in machine visual lens
=-13.42mm, f4=-11.46mm, f5=13.23mm, f6=21.26mm, f7=16.26mm, f8=-6.68mm, f9=
14.55mm, f10=8.96mm, f11=-33.95mm, f12=20.91mm, f13=-7.99mm, f14=17.11mm.Machine
Every optical system parameter of vision lenses is as follows:Object distance is 0.4m, and overall length is 59mm in optical system, and system focal length is
8.3mm, f-number 2.3, the diagonally opposed angle of visual field are 70 °, and sensitive chip is 2/3 " sensitive chip.As shown in Table 9, in this reality
Apply in example, diaphragm S and front lens group A distance is 12.923mm.
Table 10 below lists the relevant parameter of each lens, includes the refraction of surface type, radius of curvature, thickness, material
Rate and Abbe number：
Table 10
In the present embodiment, the 4th lens 4 and the 5th lens 5 form cemented doublet group, rear lens group B in front lens group A
In include three cemented doublet groups, wherein the 8th lens 8 and the 9th lens 9 form cemented doublet group, the tenth lens 10 and the tenth
One lens 11 form cemented doublet group, and the 12nd lens 12 and the 13rd lens 13 form cemented doublet group.As shown in Table 10, exist
In the present embodiment, the lensed thing side of machine visual lens institute and image side surface are sphere.
As shown in Table 10, the 4th lens 4, the 5th lens 5, the 12nd lens 12 and the 13rd lens in cemented doublet group
13 refractive index and Abbe number meets the related request of the machine visual lens according to the present invention.
Figure 14-Figure 17 is to schematically show according to an embodiment of the invention 4 machine visual lens in normal temperature, low temperature-30
DEG C, 70 DEG C of high temperature when defocusing curve figure and distortion figure.As can be seen from Figure, the f-number of machine visual lens is 2.3, work
When to make object distance be 400mm, the defocus (i.e. the focal depth range of camera lens) of camera lens in the case of 70 DEG C of normal temperature, -30 DEG C of low temperature and high temperature
In the range of -0.006mm to 0.006mm, the aberration rate of camera lens is controlled in the range of -5% for control.As can be seen here, according to this
The machine visual lens of inventive embodiments 4 equally have aberration it is small, without thermalization, aberration rate is low and the angle of visual field is wide, operating distance
The characteristics of scope is wide, focusing efficiency high, low rear burnt susceptibility.
According to an embodiment of the invention 5, as shown in Table 8, preceding group of lens A focal length fAWith rear group of lens B focal length fBBetween
Meet fA/fB=4.82.The focal length f1 of first lens 1 and preceding group of lens A focal length fABetween meet f1/fA=0.49.Second is saturating
The focal length f2 of mirror 2 and preceding group of lens A focal length fABetween meet f2/fA=-0.21.
Distances of the diaphragm S apart from front lens group A when table 11 below lists different object distances：
| Object distance (mm) | Infinity | 1000 | 400 | 100 |
| dst(mm) | 11.433 | 11.385 | 11.309 | 10.975 |
Table 11
In the present embodiment, the focal length of each lens is f1=32.15mm, f2=-13.92mm, f3 in machine visual lens
=-12.82mm, f4=-8.87mm, f5=10.94mm, f6=19.35mm, f7=31.21mm, f8=-7.07mm, f9=
14.25mm, f10=7.7mm, f11=-23.71mm, f12=10.44mm, f13=-5.57mm, f14=13.09mm.Machine
Every optical system parameter of vision lenses is as follows:Object distance is 0.4m, and overall length is 59mm in optical system, and system focal length is
7.3mm, f-number 2.3, the diagonally opposed angle of visual field are 80 °, and sensitive chip is 2/3 " sensitive chip.As shown in Table 11, at this
In embodiment, diaphragm S and front lens group A distance is 11.309mm.
Table 12 below lists the relevant parameter of each lens, includes the refraction of surface type, radius of curvature, thickness, material
Rate and Abbe number：
Table 12
In the present embodiment, the 4th lens 4 and the 5th lens 5 form cemented doublet group, rear lens group B in front lens group A
In include three cemented doublet groups, wherein the 8th lens 8 and the 9th lens 9 form cemented doublet group, the tenth lens 10 and the tenth
One lens 11 form cemented doublet group, and the 12nd lens 12 and the 13rd lens 13 form cemented doublet group.As shown in Table 12, exist
In the present embodiment, the lensed thing side of machine visual lens institute and image side surface are sphere.
As shown in Table 12, the 4th lens 4, the 5th lens 5, the 12nd lens 12 and the 13rd lens in cemented doublet group
13 refractive index and Abbe number meets the related request of the machine visual lens according to the present invention.
Figure 18-Figure 21 is to schematically show according to an embodiment of the invention 5 machine visual lens in normal temperature, low temperature-30
DEG C, 70 DEG C of high temperature when defocusing curve figure and distortion figure.As can be seen from Figure, the f-number of machine visual lens is 2.3, work
When to make object distance be 400mm, the defocus (i.e. the field depth of camera lens) of camera lens in the case of 70 DEG C of normal temperature, -30 DEG C of low temperature and high temperature
In the range of -0.006mm to 0.006mm, the aberration rate of camera lens is controlled in the range of -2% for control.As can be seen here, according to this
Invent the machine visual lens of the 4th kind of embodiment equally have aberration it is small, without thermalization, aberration rate is low and the angle of visual field is wider,
Operating distance scope is wider.
The above is only enumerating for the concrete scheme of the present invention, should for the equipment and structure of wherein not detailed description
When being interpreted as taking the existing common apparatus in this area and universal method to be practiced.
The scheme of the present invention is the foregoing is only, is not intended to limit the invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (17)
- A kind of 1. machine visual lens, it is characterised in that including：The front lens group being arranged in order along optical axis from thing side to image side (A), diaphragm (S) and rear lens group (B)；The front lens group (A) by be arranged in order along optical axis from thing side to image side the first lens (1), the second lens (2), the 3rd Lens (3), the 4th lens (4), the 5th lens (5) and the 6th lens (6) composition；The rear lens group (B) by be arranged in order along optical axis from thing side to image side the 7th lens (7), the 8th lens (8), the 9th Lens (9), the tenth lens (10), the 11st lens (11), the 12nd lens (12), the 13rd lens (13) and the 14th lens (14) form；4th lens (4) and the 5th lens (5) form cemented doublet group；Two cemented doublet groups are comprised at least in the rear lens group (B).
- 2. machine visual lens according to claim 1, it is characterised in that the front lens group (A) is relative to the mirror The imaging surface fixed setting of head, the diaphragm (S) and the rear lens group (B) can be done simultaneously relative to the front lens group (A) Linear movement in the same direction.
- 3. machine visual lens according to claim 2, it is characterised in that along the direction of thing side to image side, described One lens (1) and second lens (2) are concave-convex lens.
- 4. machine visual lens according to claim 3, it is characterised in that the focal length of first lens (1) is f1, institute The focal length for stating the second lens (2) is f2, the focal length f1 and the focal length f2 and the focal length fAMeet relationship below respectively：0.4<f1/fA<1.0；-0.43<f2/fA<-0.15。
- 5. machine visual lens according to claim 4, it is characterised in that the front lens group (A) and the rear lenses Group (B) is positive power lens group.
- 6. machine visual lens according to claim 5, it is characterised in that first lens (1), the 5th lens (5), the 6th lens (6), the 7th lens (7), the 9th lens (9), the tenth lens (10), the described tenth Two lens (12) and the 14th lens (14) are positive power lens；Second lens (2), the 3rd lens (3), the 4th lens (4), the 8th lens (8) and the described tenth Three lens (13) are negative-power lenses；11st lens (11) are positive power lens or negative-power lenses.
- 7. machine visual lens according to claim 6, it is characterised in that the rear lens group (B) includes two gluings Lens set；Wherein, the 8th lens (8) and the 9th lens (9) form cemented doublet group；12nd lens (12) and the 13rd lens (13) form cemented doublet group.
- 8. machine visual lens according to claim 6, it is characterised in that the rear lens group (B) includes three gluings Lens set；Wherein, the 8th lens (8) and the 9th lens (9) form cemented doublet group；Tenth lens (10) and the 11st lens (11) form cemented doublet group；12nd lens (12) and the 13rd lens (13) form cemented doublet group.
- 9. the machine visual lens according to one of claim 1 to 8, it is characterised in that the focal length of the front lens group (A) For fA, the focal length of the rear lens group (B) is fB, focal length fAWith focal length fBBetween meet relational expression：2.0<fA/fB<4.85。
- 10. the machine visual lens according to one of claim 1 to 8, it is characterised in that the folding of the 4th lens (4) It is nd4, Abbe number vd4 to penetrate rate, and meets relationship below：1.85<nd4<1.95；18<vd4<25。
- 11. machine visual lens according to claim 10, it is characterised in that the refractive index of the 5th lens (5) is Nd5, Abbe number vd5, and meet relationship below：1.75<nd5<1.90；20<vd5<25。
- 12. the machine visual lens according to one of claim 1 to 8, it is characterised in that the 12nd lens (12) Refractive index is nd12, Abbe number vd12, and meets relationship below：1.68<nd12<1.80；48.0<vd12<57.5。
- 13. machine visual lens according to claim 12, it is characterised in that the refractive index of the 13rd lens (13) For nd13, Abbe number vd13, and meet relationship below：1.90<nd13<2.0；17<vd13<21。
- 14. machine visual lens according to claim 13, it is characterised in that at least two in the rear lens group (B) Piece lens are fluor crown, and at least two panels lens are dense flint glass.
- 15. machine visual lens according to claim 14, it is characterised in that the 7th lens (7) and the described 9th Lens (9) are fluor crown, and the 8th lens (8) and the tenth lens (10) are dense flint glass.
- 16. machine visual lens according to claim 15, it is characterised in that the displacement of the rear lens group (B) For d, it meets relational expression：0.45mm<d<0.65mm.
- 17. machine visual lens according to claim 16, it is characterised in that the f-number of the camera lens is 2.0.
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