CN108627956A - It is a kind of width working distance sweep machine visual lens offline - Google Patents
It is a kind of width working distance sweep machine visual lens offline Download PDFInfo
- Publication number
- CN108627956A CN108627956A CN201810733778.1A CN201810733778A CN108627956A CN 108627956 A CN108627956 A CN 108627956A CN 201810733778 A CN201810733778 A CN 201810733778A CN 108627956 A CN108627956 A CN 108627956A
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- Prior art keywords
- lens
- offline
- positive light
- light coke
- working distance
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- 230000000007 visual effect Effects 0.000 title claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000000571 coke Substances 0.000 claims abstract description 20
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011521 glass Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052747 lanthanoid Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000005331 crown glasses (windows) Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
Abstract
The invention discloses a kind of wide working distances to sweep machine visual lens offline, the optical system of the camera lens by object space to image space include successively have positive light coke, bent moon structure the first lens G1, the second lens G2 with positive light coke, bent moon structure, the third lens G3 with positive light coke, bent moon structure, the 4th lens G4 with negative power, double-concave structure, the 5th lens G5 with positive light coke, biconvex structure, with negative power, the 6th lens G6 of double-concave structure and the 7th lens G7 with positive light coke, biconvex structure.It is 50mm to realize focal length, and maximum imager chip size is 44mm, while the various sizes of imager chip such as may be compatible with 28mm, 43mm；When corresponding maximum imager chip, pixel can reach 4K pixels, and full filed distortion is less than 0.08%；It is 100mm~700mm to be applicable in operating distance, can meet different application demands.
Description
Technical field
The present invention relates to machine visual lens technical fields, and in particular to it is a kind of width working distance sweep machine vision mirror offline
Head.
Background technology
The effect of NI Vision Builder for Automated Inspection is to measure target part, judge and detected defect etc. using machine, to subtract
Erroneous judgement when small or elimination manual operation, improves measurement accuracy and stability.Its central principle is by machine vision mirror
Head collects optical signal to camera, then converts optical signal into electric signal to image processing system, according to what is acquired by camera
Image information carries out various operations to extract clarification of objective, and then the device action at scene is controlled according to the result of differentiation.
Under the overall background of industrial automation, machine vision demand is growing day by day, especially in electronic manufacture, food packaging
In numerous industries such as quality assurance, workpiece positioning measurement, defects detection, the demand of focusing machine visual lens is swept more to line
Urgently.Line, which sweeps focusing machine visual lens, can carry out product or semi-finished product on real time scan detection conveyer belt, and to abnormal feelings
Condition makes quick information feedback, it is ensured that product is all satisfactory when preceding working procedure flows to later process.However it is domestic existing
Some lines sweep camera lens generally existing and are applicable in the defects of operating distance range is small, and operating distance change can be such that image quality reduces, and lead to line
It sweeps camera lens to allocate a fund for its specified purpose, strongly limits application；It sweeps in the practical application of system online, line sweeps the operating distance of camera lens
Size influence whether the size and installation space of NI Vision Builder for Automated Inspection, therefore the demand that camera lens is swept for microspur line is more urgent
It cuts.
Invention content
It is an object of the invention to：In view of the deficiencies of the prior art, provide a kind of microspur, wide operating distance, low distortion,
Focusing machine visual lens are swept in high score litz wire suitable for 10 μm of pixels.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of width working distance sweeps machine visual lens offline, including mechanical system and is installed on inside the mechanical system
Optical system, the optical system by object space to image space include successively have positive light coke, bent moon structure the first lens G1, tool
Have positive light coke, bent moon structure the second lens G2, the third lens G3 with positive light coke, bent moon structure has negative light focus
4th lens G4 of degree, double-concave structure, the 5th lens G5 with positive light coke, biconvex structure have negative power, concave-concave knot
6th lens G6 of structure and the 7th lens G7 with positive light coke, biconvex structure；The second lens G2 and the third are saturating
The focal length that mirror G3 forms the first balsaming lens U1, the first balsaming lens U1 is fU1；The 6th lens G6 and the described 7th
The focal length that lens G7 forms the second balsaming lens U2, the second balsaming lens U2 is fU2, and the focal length of the optical system is f,
F and fU1, fU2 meet following relationship：1.5<|fU1/f|<11；1.5<|fU2/f|<11.
Sweep a kind of improvement of machine visual lens offline as wide working distance of the present invention, the first lens G1's
Refractive index is n1, and Abbe number v1 meets relational expression：1.80<n1<1.90；35<v1<45.
Sweep a kind of improvement of machine visual lens offline as wide working distance of the present invention, the 4th lens G4's
Refractive index is n4, and Abbe number v4 meets relational expression：1.75<n4<1.85；20<v4<35.
Sweep a kind of improvement of machine visual lens offline as wide working distance of the present invention, the 5th lens G5's
Refractive index is n5, and Abbe number v5 meets relational expression：1.90<n5<2.05；20<v5<35.
Sweep a kind of improvement of machine visual lens offline as wide working distance of the present invention, the first lens G1 is arrived
The 7th lens G7 is glass spherical lens.
A kind of improvement for sweeping machine visual lens offline as wide working distance of the present invention, further includes diaphragm, described
Diaphragm is between the third lens G3 and the 4th lens G4, and the aperture of the diaphragm is circular hole, and the aperture of diaphragm exists
It is adjustable within the scope of F2.8~F32.
The beneficial effects of the present invention are：It is 50mm to realize focal length by above structure, and maximum imager chip size is
44mm, while the various sizes of imager chip such as may be compatible with 28mm, 43mm；When corresponding maximum imager chip, pixel is reachable
To 4K pixels, full filed distortion is less than 0.08%；It is 100mm~700mm to be applicable in operating distance, can meet different application need
It asks, while its clear aperature also can flexible modulation.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and constitutes the part of the present invention, this hair
Bright exemplary embodiment and its explanation is not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the index path of optical system in the present invention；
Fig. 3 is the MTF curve figure of the optical system of the present invention；
Fig. 4 is one of the structural schematic diagram of optical system and imaging surface relative position in the present invention；
Fig. 5 is the second structural representation of optical system and imaging surface relative position in the present invention；
Fig. 6 is the third structural representation of optical system and imaging surface relative position in the present invention；
Fig. 7 is four of the structural schematic diagram of optical system and imaging surface relative position in the present invention；
Fig. 8 is five of the structural schematic diagram of optical system and imaging surface relative position in the present invention.
Specific implementation mode
Some vocabulary has such as been used to censure specific components in specification and claim.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 used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.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 in acceptable error range, those skilled in the art can be described within a certain error range solution
Technical problem basically reaches the technique effect.
In the description of the present invention, it is to be understood that, term "upper", "lower", "front", "rear", "left", "right", level "
The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of the description present invention and
Simplify description, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration
And operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term 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 be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
Below in conjunction with attached drawing, invention is further described in detail, but not as a limitation of the invention.
As shown in Figures 1 to 3, a kind of wide working distance sweeps machine visual lens offline, including mechanical system and is installed on machinery
The optical system 300 of internal system, optical system 300 include having positive light coke, bent moon structure successively by object space to image space
First lens G1, the second lens G2 with positive light coke, bent moon structure, the third lens with positive light coke, bent moon structure
G3, the 4th lens G4 with negative power, double-concave structure, the 5th lens G5 with positive light coke, biconvex structure have negative
Focal power, the 6th lens G6 of double-concave structure and the 7th lens G7 with positive light coke, biconvex structure；Second lens G2 and
The focal length that three lens G3 form the first balsaming lens U1, the first balsaming lens U1 is fU1；6th lens G6 and the 7th lens G7 groups
Focal length at the second balsaming lens U2, the second balsaming lens U2 is fU2, and the focal length of optical system 300 is f, and f is full with fU1, fU2
Sufficient following relationship：1.5<|fU1/f|<11；1.5<|fU2/f|<11.
Preferably, the refractive index of the first lens G1 is n1, and Abbe number v1 meets relational expression：1.80<n1<1.90；35
<v1<45。
Preferably, the refractive index of the 4th lens G4 is n4, and Abbe number v4 meets relational expression：1.75<n4<1.85；20
<v4<35。
Preferably, the refractive index of the 5th lens G5 is n5, and Abbe number v5 meets relational expression：1.90<n5<2.05；20
<v5<35。
Preferably, the first lens G1 to the 7th lens G7 is glass spherical lens, by domestic heavy-lanthanide flint, fluorine crown board,
Flint, dense flint, heavy-lanthanide flint, dense flint, lanthanum crown glass are composed.
The invention also includes diaphragm 100, diaphragm 100 is between the third lens G3 and the 4th lens G4, the hole of diaphragm 100
Diameter is circular hole, and the aperture of diaphragm 100 is adjustable within the scope of F2.8~F32.
In the present embodiment, 300 data of optical system are as follows
In the present embodiment, the focal length of optical system 300 be 50mm, aperture F#=2.8, FOV=47.5 ° of field angle,
Operating distance WD=300mm.As shown in figure 3, the mtf value ＞ of the optical system 300 of the present embodiment full filed in 50lp/mm
0.3, the imager chip of 10 μm of pixel dimension or more can be matched.
It should be noted that：The object distance range of optical system 300 is 100mm~700mm, when object distance changes,
First lens G1 to the 7th lens G7 whole groups is moved forward and backward as focusing group；Specifically, as shown in Figure 4-8, as operating distance WD
When=700mm, optical system 300 is 32.416mm with 200 relative position of imaging surface；As operating distance WD=500mm, optics
System 300 is 33.988mm with 200 relative position of imaging surface；As operating distance WD=300mm, optical system 300 and imaging
200 relative position of face is 37.866mm；As operating distance WD=200mm, optical system 300 and 200 relative position of imaging surface
For 43.174mm；As operating distance WD=100mm, optical system 300 is 63.075mm with 200 relative position of imaging surface.
Several preferred embodiments of the present invention have shown and described in above description, but as previously described, it should be understood that this hair
It is bright to be not limited to form disclosed herein, it is not to be taken as the exclusion to other embodiment, and can be used for various other
Combination, modification and environment, and can in the scope of the invention is set forth herein, by the technology of above-mentioned introduction or related field or
Knowledge is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be
In the protection domain of appended claims of the present invention.
Claims (6)
1. a kind of width working distance sweeps machine visual lens offline, it is characterised in that：Including mechanical system and it is installed on the machinery
The optical system of internal system, the optical system by object space to image space include successively have positive light coke, bent moon structure
One lens G1, the second lens G2 with positive light coke, bent moon structure, the third lens G3 with positive light coke, bent moon structure,
The 4th lens G4 with negative power, double-concave structure, the 5th lens G5 with positive light coke, biconvex structure have negative light
Focal power, the 6th lens G6 of double-concave structure and the 7th lens G7 with positive light coke, biconvex structure；The second lens G2 with
The focal length that the third lens G3 forms the first balsaming lens U1, the first balsaming lens U1 is fU1；The 6th lens G6
The second balsaming lens U2 is formed with the 7th lens G7, the focal length of the second balsaming lens U2 is fU2, the optical system
Focal length be f, f and fU1, fU2 meet following relationship：1.5<|fU1/f|<11；1.5<|fU2/f|<11.
2. width working distance according to claim 1 sweeps machine visual lens offline, it is characterised in that：The first lens G1
Refractive index be n1, Abbe number v1 meets relational expression：1.80<n1<1.90；35<v1<45.
3. width working distance according to claim 1 sweeps machine visual lens offline, it is characterised in that：The 4th lens G4
Refractive index be n4, Abbe number v4 meets relational expression：1.75<n4<1.85；20<v4<35.
4. width working distance according to claim 1 sweeps machine visual lens offline, it is characterised in that：The 5th lens G5
Refractive index be n5, Abbe number v5 meets relational expression：1.90<n5<2.05；20<v5<35.
5. width working distance according to claim 1 sweeps machine visual lens offline, it is characterised in that：The first lens G1
It is glass spherical lens to the 7th lens G7.
6. width working distance according to claim 1 sweeps machine visual lens offline, it is characterised in that：Further include diaphragm, institute
Diaphragm is stated between the third lens G3 and the 4th lens G4, the aperture of the diaphragm is circular hole, the aperture of diaphragm
It is adjustable within the scope of F2.8~F32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810733778.1A CN108627956A (en) | 2018-07-06 | 2018-07-06 | It is a kind of width working distance sweep machine visual lens offline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810733778.1A CN108627956A (en) | 2018-07-06 | 2018-07-06 | It is a kind of width working distance sweep machine visual lens offline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108627956A true CN108627956A (en) | 2018-10-09 |
Family
ID=63688839
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810733778.1A Pending CN108627956A (en) | 2018-07-06 | 2018-07-06 | It is a kind of width working distance sweep machine visual lens offline |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100856A (en) * | 2018-10-19 | 2018-12-28 | 广东奥普特科技股份有限公司 | A kind of big adjustable line of target surface multiplying power of high-resolution sweeps machine visual lens |
| CN109116517A (en) * | 2018-10-19 | 2019-01-01 | 广东奥普特科技股份有限公司 | A kind of big target surface high-res line of high magnification sweeps machine visual lens |
| CN109283651A (en) * | 2018-12-12 | 2019-01-29 | 广东奥普特科技股份有限公司 | A kind of high-resolution machine visual lens structure small in size |
| CN109358408A (en) * | 2018-11-23 | 2019-02-19 | 广东奥普特科技股份有限公司 | A kind of wide operating distance high-resolution machine visual lens of big visual field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109100856A (en) * | 2018-10-19 | 2018-12-28 | 广东奥普特科技股份有限公司 | A kind of big adjustable line of target surface multiplying power of high-resolution sweeps machine visual lens |
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| CN109100856B (en) * | 2018-10-19 | 2023-10-03 | 广东奥普特科技股份有限公司 | High-resolution large-target-surface-magnification-adjustable line-scanning machine vision lens |
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| CN109283651A (en) * | 2018-12-12 | 2019-01-29 | 广东奥普特科技股份有限公司 | A kind of high-resolution machine visual lens structure small in size |
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