CN101956912A - Linear CCD light source for automatic optical inspection equipment - Google Patents
Linear CCD light source for automatic optical inspection equipment Download PDFInfo
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- CN101956912A CN101956912A CN2010101905046A CN201010190504A CN101956912A CN 101956912 A CN101956912 A CN 101956912A CN 2010101905046 A CN2010101905046 A CN 2010101905046A CN 201010190504 A CN201010190504 A CN 201010190504A CN 101956912 A CN101956912 A CN 101956912A
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Abstract
The invention relates to a linear CCD light source for automatic optical inspection equipment. The linear CCD light source mainly solves the problems that the light source used in the conventional automatic optical inspection equipment has higher requirements for the surface of a PCB semi-finished product and high use cost. The linear CCD light source is characterized in that: luminous bodies of a main light source (2) and side light sources (3) are red light LED lamps (4); the red light LED lamps (4) are arranged in a main lamp installing frame (5) and a side lamp installing frame (6); the main lamp installing frame (5) and the side lamp installing frame (6) are provided with a convex lens (7) respectively; 4, 6 or 8 side light sources (3) are symmetrically distributed on both sides of the main light source (2) and positioned on the circumference of the same sector; and a linear light beam emitted by the main light source (2) and a linear light beam emitted by the side light sources (3) are focused on the same spotlighting band. The linear CCD light source of the automatic optical inspection equipment reduces the requirements on the surface of the PCB semi-finished product and has the characteristics of clear imaging of scanned images, long service life and low use cost.
Description
Technical field:
The present invention relates to a kind of linear CCD light source of the light source that is used for automated optical detection equipment, especially automated optical detection equipment.
Background technology:
In modern electronic equipment and electronic product, printed circuit board (PCB) (Printed Circuit Borad is hereinafter to be referred as PCB) occupies an important position, and is carrier integrated, that various electronic devices and components are installed, has obtained using widely in every field.When the quality testing of PCB, usually adopt automated optical detection equipment (the English AOI of abbreviation), utilize face battle array and linear array industrial CCD in image block continuous sweep mode, whether qualified the utilization image handles and recognition technology is analyzed the PCB image, thereby judge the defective of PCB and existence.Wherein light source is unusual part and parcel in image detects, at present, employed light source is to adopt Halogen lamp LED in the external advanced PCB automated optical detection equipment, mainly form by 1 main light source and 2 sidelight sources, the high light single pass imaging that utilizes Halogen lamp LED to send, there is following defective in this light source: 1, to having relatively high expectations of PCB surface of semi-finished, need the PCB surface of semi-finished to have certain roughness and can form diffuse reflection, form clear scan image, simultaneously, the intensity of light source is too strong, angle is abundant inadequately, because be three groups of light, a lot of low-angle light do not have, thereby the blur margin of pcb board is clear.When the surface of PCB is very smooth, because some points on the strong PCB of light do not reflect bright dipping, the one, be prone to and draw the phenomenon of exposing to the sun, not fogging clear; The 2nd, do not form diffuse reflection preferably, some stains can appear after the exposure, can not obtain scan image clearly, be difficult to PCB is detected, therefore, to increase the technology that one surface roughness handled for the very smooth PCB in surface, just can detect then, increase the processing cost of PCB.2, lack service life, power consumption is big, and average every power consumption hourly is at 1kw, and per in addition 2 weeks will be changed bulb, maintenance cost height one time.
Invention utility model content:
In order to overcome disadvantages of background technology, the invention provides a kind of linear CCD light source of automated optical detection equipment, mainly solved the having relatively high expectations and problem that use cost is high of employed light source in the existing automated optical detection equipment to the PCB surface of semi-finished.The linear CCD light source of this automated optical detection equipment adopts the red LED illuminator, main light source and sidelight source reasonable disposition, with TDI (Time Delay Integration) the supporting use of camera, the realization multiframe is taken complex imaging continuously, reduced requirement, had that the scan image imaging is clear, long service life and low characteristics of use cost the PCB surface of semi-finished.
Technical scheme of the present invention is: the linear CCD light source of this automated optical detection equipment comprises mount pad, main light source and sidelight source, the illuminator in main light source and sidelight source is the red-light LED lamp, the red-light LED lamp is installed in king light installing frame and the side lamp installing frame, is equipped with convex lens on king light installing frame and the side lamp installing frame; 4,6 or 8 sidelight sources are symmetrically distributed in the both sides of main light source and are positioned on the same fan-shaped circumference, and the focus in the focus of main light source and sidelight source is on same optically focused band.
Be provided with grating between described red-light LED lamp and the convex lens.
Described mount pad is made up of 2 side plates, connecting plate and connection straps, and king light installing frame and side lamp installing frame are installed between 2 side plates and adjustable angle.
The red light wavelength that described red-light LED lamp is sent is 610～630nm.
The below of described main light source is provided with half anti-mirror, the described half parallel total reflective mirror that is provided with of anti-mirror lower surface respective side.
Described total reflective mirror is positioned at the top in the sidelight source adjacent with main light source, and the ventilation base is adopted in the sidelight source of this position, utilizes ventilating air to dispel the heat; The heat radiation type base is adopted in other sidelight source, fan is installed on the heat radiation type base is dispelled the heat.
Described half anti-mirror and total reflective mirror are installed in the picture frame, and 2 side plates that mount pad is passed at the two ends of picture frame place in the fixed head, and fixed head fixes by screw and side plate, and the side plate around the fixed head is provided with screwed hole.
The present invention has following beneficial effect: owing to take such scheme, main light source and sidelight source focus on the back on same optically focused band, this optically focused band is positioned at the surface of pcb board, utilize ruddiness that pcb board is carried out the multi-angle irradiation, ruddiness can be shorter through optical mirror slip and wavelength, can form diffuse reflection preferably, copper in the pcb board is best to reflection to red light, epoxy resin is to the copper difference in reflection, gray value can draw back like this, and the TDI cameral CCD is best to the ruddiness photosensitive effect, thereby can access pcb board scan image clearly, take complex imaging continuously by TDI camera multiframe, reduced requirement the PCB surface of semi-finished; In addition, the long service life of red-light LED lamp can be used more than half a year continuously, need not often change, and has reduced use cost.Therefore, the present invention compare with background technology have that the scan image imaging is clear, long service life and the low characteristics of use cost.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is structure cutaway views of main light source 2 among Fig. 1;
Accompanying drawing 3 is the structure cutaway views in sidelight source 3 among Fig. 1;
Accompanying drawing 4 is structural representations of mount pad 1 among Fig. 1;
Accompanying drawing 5 is structural representations of ventilation base 12 among Fig. 1;
Accompanying drawing 6 is external structure schematic diagrames of the present invention;
Accompanying drawing 7 is ray plots that the light of red-light LED lamp 4 sees through grating 16;
Accompanying drawing 8 is ray plots that red-light LED lamp 4 shines directly into body surface.
1-mount pad among the figure, 2-main light source, 3-sidelight source, 4-red-light LED lamp, 5-king light installing frame, 6-side lamp installing frame, 7-convex lens, 8-side plate, the 9-connecting plate, 10-half anti-mirror, 11-total reflective mirror, the 12-base of ventilating, 13-heat radiation type base, 14-fan, the 15-connection strap, 16-grating, 17-picture frame, the 18-fixed head, 19-screwed hole, the last lens of 20-.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing:
By Fig. 1 in conjunction with Fig. 2, Fig. 3, shown in Figure 4, the linear CCD light source of this automated optical detection equipment, comprise mount pad 1, main light source 2 and sidelight source 3, the illuminator in main light source 2 and sidelight source 3 is red-light LED lamp 4, red-light LED lamp 4 is installed in king light installing frame 5 and the side lamp installing frame 6, is equipped with convex lens 7 on king light installing frame 5 and the side lamp installing frame 6; 4,6 or 8 sidelight sources 3 are symmetrically distributed in the both sides of main light source 2 and are positioned on the same fan-shaped circumference, and the focus in the focus of main light source 2 and sidelight source 3 is on same optically focused band, and promptly this focus is in the sector circle centre position in sidelight source 3.Main light source 2 and sidelight source 3 focus on the back on same optically focused band, this optically focused band is positioned at the surface of pcb board, utilize ruddiness that pcb board is carried out the multi-angle irradiation, ruddiness can be shorter through optical mirror slip and wavelength, can form diffuse reflection preferably, copper in the pcb board is best to reflection to red light, epoxy resin is to the copper difference in reflection, gray value can draw back like this, and the TDI cameral CCD is best to the ruddiness photosensitive effect, thereby can access pcb board scan image clearly, and take complex imaging continuously by TDI camera multiframe, reduced requirement to the PCB surface of semi-finished; TDI (Time Delay Integration) camera is a kind of high sensitivity camera, is applied to the visual shooting work that runs up under high sensitivity usually.Utilize the characteristics of the characteristic of TDI camera and red-light LED wavelength can realize that the copper face of pcb board can reach the light effect of exposing to the sun under the situation of slight oxidation and moderate oxidation.In addition, the long service life of red-light LED lamp 4 can be used more than half a year continuously, need not often change, and has reduced use cost.Therefore, the present invention compare with background technology have that the scan image imaging is clear, long service life and the low characteristics of use cost.
In conjunction with Fig. 3, Fig. 6, Fig. 7, shown in Figure 8, be provided with grating 16 between described red-light LED lamp 4 and the convex lens 5 by Fig. 2.The ruddiness that each red-light LED lamp 4 sends is more diffusing, and there is a dead point phenomenon, after the ruddiness that red-light LED lamp 4 sends sees through grating 16, diffuse reflection and refraction through grating, can not occur according to less than the dead point phenomenon, and can form more parallel light beam, and then through convex lens 5 focusing, because main light source 2 is different with convex lens 7 radius of curvature on the sidelight source 3, is provided with lens 20 in main light source 2, in order to the gathering light belt of change main light source 2, make ruddiness behind main light source 2 and each sidelight source 3, focus on the same optically focused band, this optically focused band is positioned at the surface of pcb board, forms the surperficial multi-angle irradiation to pcb board, has also improved brightness simultaneously.The best design of present embodiment is the high-power red-light LED lamp that 60 ° of lighting angles are all adopted in main light source 2 and sidelight source 3, main light source 2 is at the gathering light belt apart from 10cm place formation 3mm apart from its lens top, and the gathering light belt in sidelight source 3 overlaps with the gathering light belt of main light source 2.
In conjunction with shown in Figure 4, described mount pad 1 is made up of 2 side plates 8, connecting plate 9 and connection strap 15 by Fig. 1, and king light installing frame 5 and side lamp installing frame 6 are installed between 2 side plates 8 and adjustable angle.Can be connected by screw between 15 fixations of connecting plate 9 and connection strap, king light installing frame 5 and side lamp installing frame 6 and side plate 8, position and deflection angle that bar hole is used for adjusting king light installing frame 5 and side lamp installing frame 6 are set on side plate 8.
By Fig. 2, shown in Figure 3, the red light wavelength that described red-light LED lamp 4 is sent is 610～630nm.Through experiment, this wavelength period is comparatively desirable.
By shown in Figure 1, the below of described main light source 2 is provided with half anti-mirror 10, the described half parallel total reflective mirror 11 that is provided with of anti-mirror 10 lower surface respective side.The characteristic of half anti-mirror 10 is side printing opacities, and opposite side is light tight and light can be reflected.The ruddiness that main light source 2 sends sees through half anti-mirror 10 and is radiated on the pcb board, after the ruddiness that each sidelight source 3 of while is sent also shines on the pcb board, on pcb board, form diffuse reflection preferably, the light of reflection is all reflexed on the total reflective mirror 11 by half anti-mirror 10, is reflexed to CCD by total reflective mirror 11 then and goes up imaging.
In conjunction with Fig. 2, Fig. 3, shown in Figure 5, described total reflective mirror 11 is positioned at the top in the sidelight source 3 adjacent with main light source 2 by Fig. 1, and ventilation bases 12 are adopted in the sidelight source 3 of this position, utilize ventilating air to dispel the heat; Heat radiation type base 13 is adopted in other sidelight source 3, fan 14 is installed on the heat radiation type base 13 is dispelled the heat.Because spatial constraints will be installed CCD at the oblique upper of total reflective mirror 11, the base that therefore will be positioned at the sidelight source 3 of total reflective mirror 11 belows changes ventilation base 12 into, utilizes ventilating air to dispel the heat.
By Fig. 1 in conjunction with Fig. 4, shown in Figure 6, half anti-mirror 10 and total reflective mirror 11 are installed in the picture frame 17,2 side plates 8 that mount pad 1 is passed at the two ends of picture frame 17 place in the fixed head 18, and fixed head 18 fixes by screw and side plate 8, and the side plate 8 around the fixed head 18 is provided with screwed hole 19.When the position of adjusting half anti-mirror 10 and total reflective mirror 11 and drift angle, unclamp the hold-down screw of fixed head 18, in screwed hole 19, screw in the adjustment screw of root band taper seat, under the squeezing action of adjustment screw, carry out the position and the corner of fixed head 18 are regulated, thereby adjusted half anti-mirror 10 and total reflective mirror 11 positions and corner, very convenient when Installation and Debugging.
Claims (7)
1. the linear CCD light source of an automated optical detection equipment, comprise mount pad (1), main light source (2) and sidelight source (3), it is characterized in that: the illuminator of main light source (2) and sidelight source (3) is red-light LED lamp (4), red-light LED lamp (4) is installed in king light installing frame (5) and the side lamp installing frame (6), is equipped with convex lens (7) on king light installing frame (5) and the side lamp installing frame (6); 4,6 or 8 sidelight sources (3) are symmetrically distributed in the both sides of main light source (2) and are positioned on the same fan-shaped circumference, and the focus of the focus of main light source (2) and sidelight source (3) is on same optically focused band.
2. the linear CCD light source of automated optical detection equipment according to claim 1 is characterized in that: be provided with grating (16) between described red-light LED lamp (4) and the convex lens (5).
3. the linear CCD light source of automated optical detection equipment according to claim 1 and 2, it is characterized in that: described mount pad (1) is made up of 2 side plates (8), connecting plate (9) and connection strap (14), and king light installing frame (5) and side lamp installing frame (6) are installed between 2 side plates (8) and adjustable angle.
4. the linear CCD light source of automated optical detection equipment according to claim 1 and 2, it is characterized in that: the red light wavelength that described red-light LED lamp (4) is sent is 610～630nm.
5. the linear CCD light source of automated optical detection equipment according to claim 1 and 2 is characterized in that: the below of described main light source (2) is provided with half anti-mirror (10), the described half parallel total reflective mirror (11) that is provided with of anti-mirror (10) lower surface respective side.
6. the linear CCD light source of automated optical detection equipment according to claim 5, it is characterized in that: described total reflective mirror (11) is positioned at the top in the sidelight source (3) adjacent with main light source (2), ventilation base (12) is adopted in the sidelight source (3) of this position, utilizes ventilating air to dispel the heat; Heat radiation type base (13) is adopted in other sidelight source (3), and heat radiation type base (13) is gone up installation fan (14) and dispelled the heat.
7. the linear CCD light source of automated optical detection equipment according to claim 5, it is characterized in that: described half anti-mirror (10) and total reflective mirror (11) are installed in the picture frame (17), 2 side plates (8) that mount pad (1) is passed at the two ends of picture frame (17) place in the fixed head (18), fixed head (18) fixes by screw and side plate (8), and fixed head (18) side plate (8) all around is provided with screwed hole (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101905046A CN101956912A (en) | 2010-05-31 | 2010-05-31 | Linear CCD light source for automatic optical inspection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101905046A CN101956912A (en) | 2010-05-31 | 2010-05-31 | Linear CCD light source for automatic optical inspection equipment |
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| CN101956912A true CN101956912A (en) | 2011-01-26 |
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| CN2010101905046A Pending CN101956912A (en) | 2010-05-31 | 2010-05-31 | Linear CCD light source for automatic optical inspection equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829447A (en) * | 2012-08-10 | 2012-12-19 | 昆山市和博电子科技有限公司 | Three-point and one-line type light source mounting mechanism |
| CN103090254A (en) * | 2011-10-27 | 2013-05-08 | 东莞市奥普特自动化科技有限公司 | Linear coaxial light source |
| CN105334229A (en) * | 2015-10-19 | 2016-02-17 | 浙江欧威科技有限公司 | Optical detector |
| CN105510356A (en) * | 2015-04-02 | 2016-04-20 | 浙江欧威科技有限公司 | Automatic optical unkeeping instrument |
| CN105666485A (en) * | 2016-03-28 | 2016-06-15 | 桂林电子科技大学 | Automatic identifying and positioning chess placing robot based on image processing |
| CN106124518A (en) * | 2016-07-26 | 2016-11-16 | 东莞乐视自动化科技有限公司 | Multi-angle line source is used in a kind of detection |
| CN108362713A (en) * | 2018-05-11 | 2018-08-03 | 中科慧远视觉技术（洛阳）有限公司 | A kind of optical detection imaging system |
| CN110346378A (en) * | 2019-07-24 | 2019-10-18 | 浙江欧视电科技有限公司 | A kind of full-automatic AOI detection device |
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| CN105666485A (en) * | 2016-03-28 | 2016-06-15 | 桂林电子科技大学 | Automatic identifying and positioning chess placing robot based on image processing |
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| CN110346378A (en) * | 2019-07-24 | 2019-10-18 | 浙江欧视电科技有限公司 | A kind of full-automatic AOI detection device |
| CN110346378B (en) * | 2019-07-24 | 2024-05-14 | 浙江欧视电科技有限公司 | Full-automatic AOI check out test set |
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Application publication date: 20110126 |