CN202149882U - Surface characteristic detecting device - Google Patents
Surface characteristic detecting device Download PDFInfo
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- CN202149882U CN202149882U CN201120103451XU CN201120103451U CN202149882U CN 202149882 U CN202149882 U CN 202149882U CN 201120103451X U CN201120103451X U CN 201120103451XU CN 201120103451 U CN201120103451 U CN 201120103451U CN 202149882 U CN202149882 U CN 202149882U
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Abstract
The utility model discloses a surface characteristic detecting device, which comprises a light source device, a camera, a condensation element and a semi-transparent semi-reflecting mirror. The condensation element comprises a light absorbing surface and a light transmitting surface; the light absorbing surface of the condensation element is used for absorbing diverging light of the light source device and converting the diverging light into convergent light to eject from the light transmitting surface; the semi-transparent semi-reflecting mirror and a direction of a parallel light beam are arranged at 45 degrees; the camera is arranged at a light transmitting side of the semi-transparent semi-reflecting mirror; and an object to be detected is arranged at a reflecting side of the semi-transparent semi-reflecting mirror. The light beam entering into the surface of the object to be detected is coaxial to the light beam reflecting from the surface of the object to be detected to the camera through the condensation element and the semi-transparent semi-reflecting mirror so as to not produce picture distortion when the object is obliquely shot through the camera.
Description
[technical field]
The utility model relates to a kind of pick-up unit, particularly a kind of pick-up unit that detects the smooth object surface characteristics.
[background technology]
Surface characteristics is meant characteristics such as the surperficial cut of smooth object such as film, glass, metal, bubble, pit, distortion, and it is very important branch in the Machine Vision Detection that surface characteristics detects.The fast development of integrated circuit and laser industry especially in recent years, the application demand that the surface characteristics that the productions that become more meticulous such as Chip Packaging, PCB layout, laser mark, holographic mark are proposed detects is more and more.
Traditional detection method adopts common direct light or scattered light to go to check surface characteristics as light source usually, and characteristic itself is often very not obvious, and pattern distortion takes place easily.
[utility model content]
Therefore, be necessary to provide a kind of surface characteristics pick-up unit that can fully show surface characteristics information and pattern distortion can not take place.
A kind of surface characteristics pick-up unit; Comprise a light supply apparatus, a camera, a collective optics and a semi-transparent semi-reflecting mirror; This collective optics comprises an extinction face and a transparent surface, and the extinction face of this collective optics is used for the diverging light of absorbing light source apparatus and converts it into converging beam penetrating from transparent surface, and this semi-transparent semi-reflecting lens becomes 45 degree direction settings with the parallel beam direction; This camera is located at the transparent side of this semi-transparent semi-reflecting lens, and examined object is located at the reflective side of this semi-transparent semi-reflecting lens.
Can be coaxial through collective optics and semi-transparent semi-reflecting lens so that incide the light beam and the light beam on examined object surface from the examined object surface reflection to camera, tiltedly do not clap the pattern distortion that object produces thereby can not produce camera.
[description of drawings]
Fig. 1 is the stereographic map of the surface characteristics pick-up unit of the utility model one embodiment, and wherein a side of casing is dissectd.
Fig. 2 is the sectional view and the light path principle figure of surface characteristics pick-up unit shown in Figure 1.
[embodiment]
The perfect light source of inspection surface characteristics should be able to fully be showed surface characteristics information, suppresses non-surface characteristics information simultaneously as far as possible.The staple that constitutes surface characteristics comprises roughness and flatness, and characteristics such as cut, bubble, pit, distortion can change the roughness and the flatness of object itself.Around this principle, design suitable light source, the surface characteristics of outstanding object, reduction or elimination further feature.This is actually the process of a decoupling zero.
Shown in Figure 1 is the surface characteristics pick-up unit of the utility model one embodiment, and this pick-up unit comprises a light supply apparatus 10, a casing 20 and an industrial camera 30.This casing 20 is hollow rectangular box, and this industrial camera 30 and light supply apparatus 10 lay respectively at the left and right sides at these casing 20 tops.
Please be simultaneously with reference to Fig. 2, this light supply apparatus 10 comprises a light source 111, a light source holder 112, an optical diffusion 113 and a shell 115.This shell 115 is a back taper, and the bottom of this shell 115 links to each other with the top of casing 20 and communicates with the inside of casing 20, and the top of this shell 115 has a circular open, and this light source holder 112 is snapped in this opening and is connected with shell 115; This light source holder 112 is the right cylinder of hollow; This light source 111 is located at this light source holder 112 inside fronts; Optical diffusion 113 is located at side-lower and relative with light source 111 in this light source holder 112, from the inside of light source 111 emitted light beams through optical diffusion 113 diffusion directive casings 20.This light source 111 is a pointolite, and such as light emitting diode (LED), present embodiment adopts infrared LED.
These casing 20 inside are provided with a catoptron 13, a Fresnel Lenses 15 and a semi-transparent semi-reflecting mirror 17 from right to left.This catoptron 13 can adopt direct reflection optics glass, and this catoptron 13 becomes 45 degree to be provided with surface level, and the reflecting surface of this catoptron 13 is oblique relative with light source 111 up; This Fresnel Lenses 15 is positioned at the left side of catoptron 13, and this Fresnel Lenses vertically is provided with for 15 one-tenth, and this Fresnel Lenses 15 comprises an extinction face 151 and a transparent surface 153, and this extinction face 151 is relative with catoptron 13; This semi-transparent semi-reflecting lens 17 is positioned at the left side of this Fresnel Lenses 15 and becomes 45 degree to be provided with surface level; The transparent surface 153 of the reflecting surface of this semi-transparent semi-reflecting lens 17 and Fresnel Lenses 15 is oblique relative; The below of this semi-transparent semi-reflecting lens 17 is provided with horizontally disposed examined object 70; Promptly this examined object 70 is located at the reflective side of this semi-transparent semi-reflecting lens 17, and the top of this semi-transparent semi-reflecting lens 17 is provided with industrial camera 30, and promptly this industrial camera 30 is located at the transparent side of this semi-transparent semi-reflecting lens 17.
This industrial camera 30 is fixed on the top of casing 20 through a camera mounting bracket 29, and the camera lens of this camera 30 is vertically oblique relatively with the transparent surface of semi-transparent semi-reflecting lens 17 down.For avoiding the interference of surround lighting (natural light), installed filter additional on the camera lens of this camera 30, make camera lens receive only the light that light source 111 sends.Such as, when light source 111 adopted infrared LED, then this camera lens installed infrared filter additional.
The principle of work of this surface characteristics pick-up unit is: the light beam 41 that sends from light source 111; Through projecting on the extinction face 151 of Fresnel Lenses 15 after catoptron 13 reflections; The light beam 41 that Fresnel Lenses 15 will be dispersed becomes slight convergence and penetrates near parallel light beam 43 and from transparent surface 153, and this light beam 43 projects on the reflecting surface of semi-transparent semi-reflecting lens 17 again, because this semi-transparent semi-reflecting lens 17 becomes 45 degree with level; Wherein a part of light beam is reflected to examined object 70 surfaces; If examined object 70 surfaces are enough smooth, will produce direct reflection, light beam 45 passes the camera lens that semi-transparent semi-reflecting lens 17 enters into camera 30 according to particular course.If there are bubble 80 defect characteristics such as grade on examined object 70 surfaces, light beam 47 will depart from particular course, also just can't arrive camera 30 at last, in imaging, will form blackspot, and the utmost point is convenient to the Flame Image Process of back.
Can be through semi-transparent semi-reflecting lens 17 so that incide the light beam on examined object 70 surface and coaxial to the light beam of camera 30 from examined object 70 surface reflections; Camera 30 just can be taken directly over examined object 70 surfaces like this, does not tiltedly clap the pattern distortion that object produces and can not produce camera.
Through the stroboscopic control method, make and only when camera 30 needs to take, just light led light source 111, power consumption can be reduced greatly like this, and the brightness of LED can be increased.Such as using this surface characteristics pick-up unit that the some cards on the travelling belt are detected; When card moves on travelling belt; Detect examined object through sensor; Signal to control panel, control panel is controlled light source 111 on the one hand lights it, controls camera 30 on the other hand and begins to take.Wait to take and accomplish, light source 111 is closed, and waits for that next card arrives.So, can make light source 111 brightness bigger (utmost point can reach the twice of rated power in the short time, and the average power in the whole time is very low), simultaneously can be energy-conservation.
The parameters such as height of the size of the volume through appropriate design casing 20, the size of Fresnel Lenses 15, semi-transparent semi-reflecting lens 17, the camera lens of camera 30 can be done field of detection in a big way, so can be adapted to more occasions.
In other embodiments, also available other collective opticses substitute Fresnel Lenses, such as convex lens.Because the size of Fresnel Lenses can be convenient to adapt to more Test Application and occasion doing size very big under the situation cheaply.
In other embodiments, the light that sends from pointolite can shine directly on the Fresnel Lenses, and need not to pass through earlier mirror reflects; This moment, pointolite must be arranged near the focal length point of Fresnel Lenses; But so, can increase the size of casing, be unfavorable for installing.
Detection effect through experiment showed, the surface characteristics pick-up unit inspected object surface characteristics that adopts the utility model obviously is superior to the traditional detection device.
In sum, the surface characteristics pick-up unit of the utility model has several respects advantage:
1. undistorted imaging: this device adopts special light path design, particularly Fresnel Lenses and the combination of semi-transparent semi-reflecting lens, can finely overcome distortion in images, is different from the like product on the market.
2. saving space, outward appearance is brief, is easy to install: this device employing catoptron and combination of light sources, saved installing space effectively; This device appearance is the case shape, and size is 360 * 350 * 230mm, compact conformation, deft design.
3. do not receive ambient light effects: this device adopts infrared LED as light source, and adds infrared filter in camera end, can finely separate with surround lighting.
4. low-power consumption, low heat emission: this device adopts some LED and special control method, and power consumption is very low, and rated power is lower than the like product on the market less than 1W.
5. big visual field, scalable: this device maximum field of view can reach 150 * 200mm, can satisfy the little surface characteristics that arrives banknote to chip, greatly and check.
Though this patent is described with reference to current preferred embodiments; But those skilled in the art will be appreciated that; Above-mentioned preferred embodiments only is used for explaining this patent, is not the protection domain that is used for limiting this patent, and is any within the spirit and principle scope of this patent; Any modification of being done, equivalence replacement, improvement etc. all should be included within the rights protection scope of this patent.
Claims (10)
1. surface characteristics pick-up unit; Comprise a light supply apparatus and a camera; It is characterized in that: also comprise a collective optics and a semi-transparent semi-reflecting mirror; This collective optics comprises an extinction face and a transparent surface, and the extinction face of this collective optics is used for the diverging light of absorbing light source apparatus and converts it into converging beam penetrating from transparent surface, and this semi-transparent semi-reflecting lens becomes 45 degree direction settings with the parallel beam direction; This camera is located at the transparent side of this semi-transparent semi-reflecting lens, and examined object is located at the reflective side of this semi-transparent semi-reflecting lens.
2. surface characteristics pick-up unit as claimed in claim 1; It is characterized in that: also comprise a catoptron; This catoptron is located at the right side of the extinction face of this collective optics; This light supply apparatus is located at the top of this catoptron, and this catoptron becomes 45 degree to be provided with level, and the extinction face of the reflecting surface of this catoptron and collective optics is oblique relatively.
3. surface characteristics pick-up unit as claimed in claim 2 is characterized in that: this collective optics is a Fresnel Lenses, and this Fresnel Lenses is vertically to be provided with.
4. surface characteristics pick-up unit as claimed in claim 3; It is characterized in that: the reflecting surface of this semi-transparent semi-reflecting lens and the transparent surface of this Fresnel Lenses are oblique relatively; The reflecting surface of this semi-transparent semi-reflecting lens becomes 45 degree to be provided with surface level; This examined object is located at the below of the reflecting surface of this semi-transparent semi-reflecting lens, and this object under test becomes to be horizontally disposed with.
5. surface characteristics pick-up unit as claimed in claim 4 is characterized in that: the camera lens of this camera is vertically oblique relatively with the transparent surface of this semi-transparent semi-reflecting lens down.
6. surface characteristics pick-up unit as claimed in claim 5; It is characterized in that: also comprise a casing; This casing is hollow rectangular box; Said collective optics, semi-transparent semi-reflecting lens and catoptron all are located in this casing, and this catoptron, collective optics and semi-transparent semi-reflecting lens are arranged in order from right to left, and this camera and light supply apparatus lay respectively at the left and right sides at this casing top.
7. like any described surface characteristics pick-up unit in the claim 1 to 6, it is characterized in that: this light supply apparatus comprises a LED pointolite.
8. surface characteristics pick-up unit as claimed in claim 7 is characterized in that: this LED pointolite is an infrared LED, is furnished with infrared filter on the camera lens of this camera.
9. surface characteristics pick-up unit as claimed in claim 7 is characterized in that: this LED pointolite adopts the mode of stroboscopic to control its brightness.
10. surface characteristics pick-up unit as claimed in claim 7; It is characterized in that: this light supply apparatus also comprises a light source holder, an optical diffusion and a shell; This shell is a back taper; The bottom of this shell links to each other with the top of casing and communicates with the inside of casing, and the top of this shell has a circular open, and this light source holder is snapped in this opening and is connected with shell; This light source holder is the right cylinder of hollow, and this light source is located at this light source holder inside front, and optical diffusion is located at side-lower and relative with light source in this light source holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120103451XU CN202149882U (en) | 2010-12-15 | 2011-04-03 | Surface characteristic detecting device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020662268 | 2010-12-15 | ||
| CN201020662268.9 | 2010-12-15 | ||
| CN201120103451XU CN202149882U (en) | 2010-12-15 | 2011-04-03 | Surface characteristic detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149882U true CN202149882U (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120103451XU Expired - Lifetime CN202149882U (en) | 2010-12-15 | 2011-04-03 | Surface characteristic detecting device |
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| Country | Link |
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| CN (1) | CN202149882U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110262092A (en) * | 2019-04-26 | 2019-09-20 | 合刃科技（武汉）有限公司 | A kind of liquid crystal display detection method based on NI Vision Builder for Automated Inspection |
| CN110501343A (en) * | 2019-08-23 | 2019-11-26 | 大族激光科技产业集团股份有限公司 | Light supply apparatus, detection method of surface flaw and device |
| CN111213040A (en) * | 2018-08-10 | 2020-05-29 | 合刃科技（深圳）有限公司 | Vibration monitoring method and system |
-
2011
- 2011-04-03 CN CN201120103451XU patent/CN202149882U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111213040A (en) * | 2018-08-10 | 2020-05-29 | 合刃科技（深圳）有限公司 | Vibration monitoring method and system |
| CN110262092A (en) * | 2019-04-26 | 2019-09-20 | 合刃科技（武汉）有限公司 | A kind of liquid crystal display detection method based on NI Vision Builder for Automated Inspection |
| CN110501343A (en) * | 2019-08-23 | 2019-11-26 | 大族激光科技产业集团股份有限公司 | Light supply apparatus, detection method of surface flaw and device |
| CN110501343B (en) * | 2019-08-23 | 2022-04-29 | 大族激光科技产业集团股份有限公司 | Light source device, surface defect detection method and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120222 |