CN208041755U - The concentration structure and light-source system of linear light source - Google Patents
The concentration structure and light-source system of linear light source Download PDFInfo
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- CN208041755U CN208041755U CN201721715255.1U CN201721715255U CN208041755U CN 208041755 U CN208041755 U CN 208041755U CN 201721715255 U CN201721715255 U CN 201721715255U CN 208041755 U CN208041755 U CN 208041755U
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Abstract
The utility model provides a kind of concentration structure and light-source system of linear light source, the light-source system includes light source module and light focusing unit module, the light source module is linear light source, the light focusing unit module includes the first slit, frosted glass, the second slit and the collector lens set gradually along the optical path direction of linear light source, the distance between second slit and collector lens are more than the focal length of collector lens, and less than two times of focal lengths of collector lens.The utility model can provide good field illumination environment for object to be measured, improve the quality of acquired image, to improve the recognition effect of Machine Vision Inspecting System.
Description
Technical field
The utility model belongs to technical field of machine vision, and in particular to a kind of concentration structure of linear light source and light source system
System.
Background technology
Detected target is converted into image by NI Vision Builder for Automated Inspection by image acquisition hardware (camera, camera lens, light source etc.)
Signal, and it is communicated to dedicated image processing system.Image processing system is carried out according to information such as pixel intensity, distribution of color
The extraction of target signature, and the equipment for being judged accordingly, and then scene being controlled according to result.With efficient, easy collection
At, stability is good, increasingly automated the features such as, with the fast development of the technologies such as image procossing and pattern-recognition, answer extensively
For assembling positioning, product defects detection, target identification, dimensional measurement etc..
Because required information is included in image, it is most important to obtain a quality height, the apparent image of feature.Cause
This, it is necessary to select a suitable light source to provide good field illumination for object to be measured.
Currently, Ordinary Light Sources Have is mainly three kinds of point light source, linear light source and area source in NI Vision Builder for Automated Inspection.Point light source one
As be made of single illuminator, brightness is high but uniform illumination degree is low, and when detecting strip region, needs with control mechanism
It is moved, it is inefficient；Although area source light area is big and uniform illumination degree is preferable, there is driving and heat dissipation design
The difficulty of aspect, is generally used for backlight；Linear light source laser makees best, brightness height and uniform-illumination, stabilization, but equipment cost
It is high.
Utility model content
In view of this, the utility model provides a kind of concentration structure and light-source system of linear light source.The concentration structure exports
Line style light have the characteristics that brightness is high, uniform-illumination, and disclosure satisfy that the needs of Machine Vision Inspecting System.
To achieve the goals above, the technical solution of the utility model is as follows：
A kind of concentration structure of linear light source, include the first slit set gradually along the optical path direction of linear light source, frosted glass,
Second slit and collector lens, the distance between second slit and collector lens are more than the focal length of collector lens, and are less than
Two times of focal lengths of collector lens.
Preferably, in the concentration structure of above-mentioned linear light source, the collector lens is convex surface cylindrical lens.
Preferably, in the concentration structure of above-mentioned linear light source, first slit, frosted glass, the second slit and optically focused
Lens are set in a shell, and the light-emitting window of bar shaped is offered on the shell.
Preferably, in the concentration structure of above-mentioned linear light source, the distance between the light-emitting window and collector lens are more than
Two times of focal lengths of collector lens.
Disclosed herein as well is a kind of light-source system, including light source module and light focusing unit module, the light source bodies
Module is linear light source, the light focusing unit module include the first slit set gradually along the optical path direction of linear light source, frosted glass,
Second slit and collector lens, the distance between second slit and collector lens are more than the focal length of collector lens, and are less than
Two times of focal lengths of collector lens.
Preferably, in above-mentioned light-source system, the light source module includes the LED lamp beads of more linear arrays.
Preferably, in above-mentioned light-source system, adjacent LED lamp bead is smaller than or equal to plane where LED lamp bead
At a distance between the first slit.
Preferably, further include the constant-current driven module for being connected to the light source module in above-mentioned light-source system.
Preferably, in above-mentioned light-source system, the work(of constant-current driven module the integrated simulation light modulation and digital dimming
Energy.
Disclosed herein as well is a kind of application of light-source system in machine vision illumination.
Compared with prior art, the utility model provides a kind of machine vision linear light source scheme：
The diverging light of linear light source is converged using optical elements such as collector lenses, obtains the line of brightness height and uniform-illumination
Light improves the quality of acquired image, effectively improves machine vision to provide good field illumination environment for object to be measured
The efficiency and recognition effect of detecting system.
Linear light source system structure is simple, of low cost, and compact, convenient for installation and maintenance, has very strong practicality
Property.
Conventional incandescent, fluorescent lamp are substituted using LED light source, small, brightness is high, and stable and reliable in work.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can be obtain other attached drawings according to these attached drawings.
Fig. 1 show the principle schematic of light-source system in the utility model specific embodiment；
Fig. 2 show the principle schematic of light focusing unit module in the utility model specific embodiment；
Fig. 3 show the main body circuit figure of constant-current driven module in the utility model specific embodiment；
Fig. 4 show the concrete structure schematic diagram of light source module in the utility model specific embodiment；
Fig. 5 show the optically focused light path schematic diagram of light focusing unit module in the utility model specific embodiment；
Fig. 6 show in the utility model specific embodiment position relationship schematic diagram between the first slit and LED lamp bead.
Specific implementation mode
The technical scheme in the utility model embodiment is clearly and completely described below, it is clear that described reality
It is only the utility model a part of the embodiment to apply example, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this reality
With novel protected range.
Fig. 1 show the structural schematic diagram of the utility model specific embodiment.
In Fig. 1, machine vision LED line light source 10 includes sequentially connected power module 11, constant-current driven module 12, light source
Module 13 and light focusing unit module 14.The diverging light of plurality of LEDs lamp bead can be converged, obtain the line of brightness height and uniform-illumination
Light.
The power module provides power supply needed for system each unit；The switch shape of the constant-current driven module control light source body
State and brightness regulation；The light source module is made of plurality of LEDs lamp bead；The light focusing unit module, including carry light-emitting window
Shell, for pooling light, brightness is high and the linear light of uniform-illumination.
In conjunction with shown in Fig. 2, the limit light unit that light focusing unit module 14 is mainly made of the first slit 141, frosted glass 142,
Second slit 143, the collimation unit that collector lens 144 forms and the shell three parts with light-emitting window 145 are constituted.
Limit light unit is set between light source module and collimation unit.First slit 141, frosted glass 142, the second slit
143, collector lens 144 is set gradually along optical path direction.
Linear light sorurce, the first slit, the second slit and light-emitting window position correspond to.Position at this corresponds to, including height pair
It answers, and opening extending direction corresponds to.In one embodiment, the horizontal or vertical setting of linear light sorurce.The line that linear light sorurce generates
Type light passes through the first slit, frosted glass and the second slit successively, is then converged by collector lens, the high brightness after convergence
Line style light is projected from light-emitting window.
The width of light-emitting window is equal or slightly larger than the width of the line style light after collector lens convergence.
In the present embodiment, the first slit 141 and frosted glass 142 composition limit light unit, main function be decaying light intensity,
Even light field.Wherein the first slit 141 is used to choose the light in certain angle of divergence, and frosted glass 142 is distributed for uniform light field；The
Two slits 143 and collector lens 144 are used cooperatively, and realize that light beam focuses, and the stripe shape light field after limit light unit is uniform is changed
At required line style light field.
In the present embodiment, first slit 141 between frosted glass 142 at a distance from the illumination loss range of permission to the greatest extent
Amount is big, so that divergence of beam is uniform, avoids the occurrence of apparent hot spot.The spacing of second slit 143 and collector lens 144 is more than
The focal length of collector lens is less than two times of focal lengths of collector lens.
First slit 141, frosted glass 142, the second slit 143, collector lens 144 and light source module 13 are distinguished
Fixed inside the shell by holder, resettlement groove, screw hole etc., fixed form does not limit.
The collector lens 144 selects convex surface cylindrical lens, and the diverging light sent out from the second slit 143 is pooled required line
Type light makes light beam illumination evenly while improving brightness.
In a preferred embodiment, the shelling machine is at box-like cubic type.The light-emitting window 145 of the shell is item
Shape, the width of the strip shape gob are slightly larger than the width of the line style light after collector lens convergence.
Fig. 3 show the main body circuit figure of constant-current driven module 12 in Fig. 1.
The constant-current driven module 12 uses the high-power constant-current drive circuit based on RT8482 chips.The controller collection at
Simulation light modulation is with digital PWM dimming function in one, it can be achieved that LED light source body on off state and the intelligence of brightness are adjusted.
Fig. 4 show the concrete structure schematic diagram of light source module 13 in Fig. 1.
The light source module 13 includes plurality of LEDs lamp bead 131 of the linear array on pcb board, 132 and of aluminum base PCB plate
Aluminium Radiator 133.LED lamp bead 131 chooses white, highlighted, the patch-type LED that power is 0.5W, and equal in the form of one arranges
It is even to be arranged on aluminum substrate 132, lamp bead be smaller than or equal to lamp bead plane between the first slit 141 at a distance from.Aluminum base PCB plate
132 and Aluminium Radiator 133 be mainly used to realize effective heat dissipation, reduce influences of the Wen Sheng to LED light source luminous efficiency.
Fig. 5 show the optically focused light path schematic diagram of light focusing unit module 14 in Fig. 1.
As shown in figure 4, F, F ' be plano-convex cylindrical lens both sides focal length at, 2F, 2F ' be 2 times of plano-convex cylindrical lens both sides focal length at,
A is second slit 143 in the preceding present position of plano-convex cylindrical lens, and A ' is 145 present position of light-emitting window.
By convex lens imaging principle it is found that when object distance is less than focal length or is more than 2 times of focal lengths of lens, hair can not be effectively converged
Astigmatism line.Therefore in the present embodiment, the second slit 143 is placed between the focal length of lens and 2 times of focal lengths, in determining image distance just
It can obtain required high brightness line style light beam.
In conjunction with shown in Fig. 6, the first slit 141 is dissipated with LED lamp bead plane distance H and lamp bead interval S and LED lamp bead
Angle is related.
By taking the lamp bead angle of divergence is 120 ° as an example, H and S should meet：
First slit 141 between frosted glass 142 at a distance from can be big as possible in the illumination loss range of permission so that light
Line diverging is uniform, avoids the occurrence of apparent hot spot；The distance between frosted glass 142 and the second slit 143 are small as possible, avoid through
Cross limit light unit it is uniform after stripe shape Light Energy loss it is excessive, influence rear class light intensity.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (9)
1. a kind of concentration structure of linear light source, which is characterized in that include along linear light source optical path direction set gradually it is first narrow
Seam, frosted glass, the second slit and collector lens, the distance between second slit and collector lens are more than the coke of collector lens
Away from, and less than two times of focal lengths of collector lens.
2. the concentration structure of linear light source according to claim 1, which is characterized in that the collector lens is that convex surface column is saturating
Mirror.
3. the concentration structure of linear light source according to claim 1, which is characterized in that first slit, frosted glass, second
Slit and collector lens are set in a shell, and the light-emitting window of bar shaped is offered on the shell.
4. the concentration structure of linear light source according to claim 3, which is characterized in that between the light-emitting window and collector lens
Distance be more than collector lens two times of focal lengths.
5. a kind of light-source system, which is characterized in that including light source module and light focusing unit module, the light source module is
Linear light source, the light focusing unit module includes the first slit set gradually along the optical path direction of linear light source, frosted glass, second narrow
Seam and collector lens, the distance between second slit and collector lens are more than the focal length of collector lens, and saturating less than optically focused
Two times of focal lengths of mirror.
6. light-source system according to claim 5, which is characterized in that the light source module includes more linearly aligned
LED lamp bead.
7. light-source system according to claim 6, which is characterized in that adjacent LED lamp bead is smaller than or is equal to LED light
Plane where pearl between the first slit at a distance from.
8. light-source system according to claim 6, which is characterized in that further include the constant current for being connected to the light source module
Drive module.
9. light-source system according to claim 8, which is characterized in that the constant-current driven module integrated simulation light modulation and number
The function of word light modulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721715255.1U CN208041755U (en) | 2017-12-11 | 2017-12-11 | The concentration structure and light-source system of linear light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721715255.1U CN208041755U (en) | 2017-12-11 | 2017-12-11 | The concentration structure and light-source system of linear light source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990215A (en) * | 2017-12-11 | 2018-05-04 | 苏州大学 | Concentration structure, light-source system and the application of line source |
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2017
- 2017-12-11 CN CN201721715255.1U patent/CN208041755U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990215A (en) * | 2017-12-11 | 2018-05-04 | 苏州大学 | Concentration structure, light-source system and the application of line source |
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