CN1568132A - Apparatus and method for optical detecting of printed circuit board - Google Patents
Apparatus and method for optical detecting of printed circuit board Download PDFInfo
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- CN1568132A CN1568132A CN 03149136 CN03149136A CN1568132A CN 1568132 A CN1568132 A CN 1568132A CN 03149136 CN03149136 CN 03149136 CN 03149136 A CN03149136 A CN 03149136A CN 1568132 A CN1568132 A CN 1568132A
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Abstract
The invention relates to a method used to check the printed circuit board of optics. It includes: a lighting system, a control system and a planar lens system. The lighting system contains a planar printed circuit board, plural light emitting components distributed densely as plane array mode and at least one area that connects to the planar lens system and can be separated according to the distance of the center of the lighting system; the control system connects to the lighting system and any isomerous light emitting components in the lighting system can be chose randomly to light at least one area; and the planar lens system has at least one planar lens set at the front of the lighting system and connected tightly to gather the light emitted by the light emitting components to any location of the printed circuit board. The checking device and the method can be used in the process of setting the components to the printed circuit board.
Description
Technical field
The present invention relates to a kind of devices and methods therefor that is used for the printed circuit board (PCB) optical detection, especially refer to that a kind of Application Optics principle is installed in order to the detected electrons element in the processing procedure of printed circuit board (PCB), the printed circuit board (PCB) in arbitrary stage, electronic component and aforementioned between the two device and its detection method that whether shortcoming etc. is then arranged are installed on it.
Background technology
Aspect the product quality testing of making industry, for improving its speed and performance, oneself replaces original artificial visual detection gradually the optical detection system at present.Because of the optical detection system can convert the image frame of complexity to interpretation information, with comparison zero defect is arranged by microprocessor, not only avoided human tired and the problem of makeing mistakes, and can improve it and detect accuracy, and can detect the efficient that produces that improves full processing procedure fast because of it.In electronic industry, oneself is widely used the optical detection system, as being used for seeking trickle dust particle in the manufacture of semiconductor, carries out accurate localization, and the printed circuit board (PCB) assembling detects Short Item, empty weldering etc.For the dealer who is engaged in circuit board assembling production, wish that all the processing procedure of product can reach high-quality high efficiency target.Short, little, light at product, thin reaching under the inexorable trend of amassing bodyization must increase machine plate wiring density, cancels test point, and the electronic component volume is dwindled, to meet demand.Under this overall situation changes, the probe in detecting of traditional visual detection and ICT all will be blocked inspection rate and lower more and more inadequacy of coverage rate because of it is unsettled.In the face of short and small frivolous and the test difficulty that causes develops other accurate detection technique, be to become the task of top priority with the deficiency that remedies conventional method.Because the significantly lifting of the solid state camera resolution and the operational speed of a computer, with the digitized video is the accurate mechanism location of vision system cooperation of substrate, PCB machine plate automatic optical detector (the AOI System that reaches the database of computer-aided design and design, Automated OpticalInspection System) imports the high-speed production lines of electronic industry gradually, to measure each class feature in the processing procedure apace, find out bad problem points, such as scarce material, wrong part, skew, short circuit, flaw such as open circuit.Usually this system all can replace the visual detection person in the production line, can carry out test in one day 24 hours fast, can be because of burnout, cause careless omission, and save labour turnover, simultaneously also therefore system have the function of adding up keyholed back plate, the data information of fault statistics analysis can be offered producer's reference, reach the function of quality keyholed back plate, promote yield, and then reduce production cost and enhance productivity.The QC of development of making rapid progress for the adaptive circuit plate and similar installation surface adhesion components processing procedure thereon etc. detects demand, the test function of AOI must be very complete, the three-dimensional measuring ability in three-dimensional space has been one of prerequisite condition, in the hope of with highly relevant testing result also can be accurately reliable.Adopt many tools charge coupled device (CCD) video camera can further promote the detection coverage rate, become industry and detected the upward necessary practice from the AOI system that multi-angle is taken.Need not use tool with the AOI test, so can save tool and purchase the system expense, also do not need because of waiting for tool, and the unnecessary waste quality time, can launch at once to produce, not only manufacturing industry is paid attention to, and the client also begins to specify manufacturer must use such device on its product line, to promote the shipment yield.Demand face of looking forward to the future and application more enlarge certainly, the manufacturer of AOI is one after another for providing more complete test equipment product line to existing ICT probe in detecting customers, and use with the AOI similar techniques and give potential new client to develop other application new product, and urgently think to improve.Certainly, the short-term goal that can expect is then for researching and developing the AOI checkout equipment of brand-new high at a high speed illumination capture, with its benefit of further lifting.
As previously mentioned, it is difficult to make an AOI machines, true difficulty be how to design and produce AOI machines with better usefulness.In general, making charge coupled device video camera, the video camera eyeglass of every significant components of AOI machines such as double speed and four speed, two/three mobile platforms, Frame Grabber etc. all can provide the quality foot to apply required product by industry.Key component wherein then is the illuminator of AOI machines, and for improving its effect, product design and manufacturer can say and spend all pains.Most AOI machines is made the light-emitting diode of chamber of commerce's use high brightness in the illuminator of this machine, for example: SONY/VARIA, Teradyne, OMROM, MVP, HP/MVT, Samsung and LG etc.It is reported at present and have only Orbotech to use xenon flash lamp, SAKI then uses the fluorescent luminaire.The illuminator monomer of present existing great majority use light-emitting diode all can be in buying as manufacturers such as CCS company place.As distinguishing according to lighting system, the illuminator monomer of above-mentioned use light-emitting diode comprises Flat Ring Systems, the Low AngleSystems of Low Angle Systems, Bar Systems, Convergent-beam Systems and the indirect lighting mode of direct lighting mode, Back Light Systems, the Line Systems of backlighting mode and the Coaxial Systems of coaxial-illuminating mode and the Collimated-light opticalunits of special lighting mode etc.
Be subject to the size sensor size of photography, reach one 20 millimeters resolution, the surveyed area in every visual field only can be between 12 * 9 square millimeters and 24 * 18 square millimeters.Illumination is bright more, and then the degree of depth in the visual field just can be big more.The performance of aforementioned illuminator depends on how the light that all are available focuses on a bit.Each commercially available commercial product only provides single lighting system, and though its be directly, diffusion, low angle, still ring (ambient) lighting system of covering.The different lighting system of comprehensive use is possible, but can increase according to the degree of difficulty of tool take up space with Synchronization Control.The manufacturer of AOI machines researches and develops the illuminator of the better effect of tool one after another, but at present tool integrating illumination control ability to the degree of subregion to attempt to satisfy the diversity of illumination control.For reaching the lighting condition around the homogeneous of target, particularly in a nearer distance, the diffuser of light often is used, but then relative having weakened of output of light thus.Use the example plane ring system 1 as shown in Figure 1 of above-mentioned light diffuser principle.For making all light-emitting diodes, be used as the device 2 of a kind of individual dome-like structures among Fig. 2, but also have light-emitting diode to place the shortcoming that density is low and operating distance is short all towards the irradiation target.For in the confined space, obtaining maximum density, a kind of stage construction or or even the elastic substrates of C type be used to form the annulus illumination of a solid, but its shortcoming is a light can't focus on a bit, a kind ofly uses illuminator 3 that the method tool stage construction is the umbrella configuration as shown in Figure 3.
How to create can send high illumination, balanced light and can concentrate on one very the AOI machines illuminator of zonule be the common ideal of pursuing of this industry at present with further its measuring ability that improves.
Summary of the invention
Main purpose of the present invention is for overcoming the deficiencies in the prior art and defective, a kind of apparatus and method of optical detection printed circuit board (PCB) are provided, be used for installing arbitrary stage of processing procedure as the printed circuit board (PCB) electronic component, with quick discovery and note down this printed circuit board (PCB) and after to such an extent as to the electronic component process is finished whether any shortcoming is arranged in installing, and can be added up and be made record, with the QC of improvement processing procedure, and can adapt to its fast detecting to improve the production performance of this processing procedure.
Another object of the present invention is for providing a kind of device that is used for printed circuit board (PCB) detecting, it comprises: an illuminator, tool one plate printed circuit board (PCB), several light-emitting components are with planar array mode dense distribution and be linked on this plate printed circuit board (PCB), and can be by dividing at least one zone apart from this illuminator one reference center point distance, one control system, be connected in this illuminator, wherein several light-emitting components of this of this illuminator can be selected at least one zone arbitrarily and all both one luminous with illumination by this control system, an and plane lens combination, at least one plane lens of tool place before this illuminator and closely link with it, to assemble these several light-emitting component issued lights arbitrary position to this printed circuit board (PCB).
According to above-mentioned device, these several light-emitting components are light-emitting diode.
According to above-mentioned device, these plane lens are a Fresnel Lenses.
According to above-mentioned device, this device further comprises a camera chain, and at least one video camera of tool is to be received from these several light-emitting component issued lights that reflected on this printed circuit board (PCB).
According to above-mentioned device, this at least one video camera be installed on respectively this reference center point dead astern of this illuminator and respectively with the dead astern of the equidistant at least one position of this reference center point, and this at least one video camera is connected in this illuminator.
According to above-mentioned device, this at least one zone can be divided into a central area and at least one surrounding zone according to this reference center dot spacing abscission zone with this illuminator.
According to above-mentioned device, this at least one zone is except that this central area, and comply with at least one zone of dividing apart from this central point distance and the direction of this illuminator arbitrary can further the comprising in all the other surrounding zones.
According to above-mentioned device, this control system with control in these several light-emitting components in this at least one zone arbitrary for luminous and not luminous both one of and this at least one video camera of this camera chain in arbitrary serve as start and do not start both one of shine a lighting condition of arbitrary position on this tool assembly printed circuit board (PCB) and make up and comprise projecting direction to control this illuminator, angle, illumination and when having at least the more than one light-emitting component of a regional tool luminous in this at least one zone is by selecting at least one video camera that is adjacent to this light-emitting zone to shine in being the image of center one particular range with this position to note down this illuminator in this at least one video camera.
According to above-mentioned device, this particular range size depends on the size of a transducer of this video camera and the demand of detection resolution.
According to above-mentioned device, this device further comprises at least one display of a display system tool, so that this image is shown on the display screen.
Whether according to above-mentioned device, this device further comprises at least one microprocessor system, relatively more variant and give record with decision this image and this particular range one unblemished photologging are made one.
According to above-mentioned device, this printed circuit board (PCB) is meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
Another object of the present invention for the device of the display system of microprocessor system that the camera chain that uses a tool one to be made up of at least one video camera by the illuminator of at least one several light-emitting diodes of regional dense arrangement and plane lens composition more than, in the plane, a control system, at least one microprocessor of a tool are provided and at least one display of a tool to detect the method for a printed circuit board (PCB), its method comprises the following step:
(a) select a certain position on this printed circuit board (PCB);
(b) adapting to this position is that this printed circuit panel configuration is set lighting condition combination and comprised projecting direction, angle, illumination in one particular range of center;
(c) use this control system to make that there is more than one this lumination of light emitting diode at least more than one zone in these several zones of this illuminator, and be gathered in the position of this selection through these plane lens of this illuminator with the light that will be produced, with this lighting condition of producing this setting in the position of this selection;
(d) adapt to the illumination of this chosen position, when having at least a zone to have more than one this light-emitting component luminous in this at least one zone, use this control system to shine photographic image to note down this illuminator in this arbitrary position by starting at least one video camera that is adjacent to arbitrary light-emitting zone in this at least one video camera;
(e) adapt to the illumination of this chosen position, these are started video cameras this photographic image of this chosen position is shown on the display screen of this display system; And
(f) this microprocessor system is taken out image record of this chosen position one correct comparison usefulness certainly, and with this photographic image relatively, with decision variant existence whether;
(g) whether this photographic image of this chosen position and comparative result is variant, be embedded in this microprocessor system.
According to above-mentioned method, at least one video camera of this camera chain tool, be installed on respectively a reference center point dead astern of this illuminator and respectively with the dead astern of the equidistant at least one position of this reference center point.
According to above-mentioned method, these several zones can be divided into a central area and at least one surrounding zone according to this reference center point distance regions with this illuminator.
According to above-mentioned method, these several zones are except that this central area, and comply with at least one zone of dividing apart from this central point distance and the direction of this illuminator arbitrary can further the comprising in all the other surrounding zones.
According to above-mentioned method, this particular range size depends on the size of a transducer of this video camera and the demand of detection resolution in this step (b).
According to above-mentioned method, these plane lens are a Fresnel Lenses in this step (c), are installed on before these several light-emitting diodes and closely link with it, to assemble the arbitrary position of these several light-emitting diode issued lights to this printed circuit board (PCB).
According to above-mentioned method, this printed circuit board (PCB) is meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
Description of drawings
Fig. 1 is the plane ring-type system schematic of automatic optical detector illuminator;
Fig. 2 is the individual dome-like structures system schematic of automatic optical detector illuminator;
Fig. 3 is the umbrella-shaped structure system schematic of automatic optical detector illuminator;
Fig. 4 Fresnel Lenses and point-foussed optical principle schematic diagram thereof;
Fig. 5 is the summary Organization Chart of a kind of checkout gear of preferred embodiment of the present invention;
Fig. 6 is the schematic diagram of a kind of checkout gear of preferred embodiment of the present invention.
Symbol description among the figure
The plane ring system of 1 automatic optical detector illuminator
The individual dome-like structures system of 2 automatic optical detector illuminators
The umbrella-shaped structure system of 3 automatic optical detector illuminators
10 illuminators
101 plate printed circuit board (PCB)s
102 with several light-emitting diodes of planar array mode dense distribution
20 planar lens systems
201 1 ordinary lenses are flat to be turned to before the Fresnel Lenses
202 1 ordinary lenses are flat to be turned to after the Fresnel Lenses
30 illuminators, one reference center point
40 detect target
50 camera chains
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with drawings and Examples.
See also Fig. 4, key core of the present invention is the utilization of a Fresnel Lenses 202, and it is a transparent optical material plane, and it can assemble directional light in a bit, as common convex lens.Its aufbauprinciple can be envisioned as the common convex lens 201 flat Fresnel Lenses 202 that turn to, and a high illumination, balanced light can be provided and can concentrate on a zonule very.The illuminator of one utilization Fresnel Lenses 202 not only can be used for improving accuracy of detection and the capture speed of AOI machines, also can be used in other need by illumination optical, in order to compare examined article surface whether on the imperfect similar applications; Except that printed circuit board (PCB), for example the Defect Detection of the Defect Detection of electronic component (as diode) itself or integrated circuit (as chip etc.) all is.
See also Fig. 5, be the summary framework of a kind of checkout gear of preferred embodiment of the present invention.Main system architecture of the present invention is by an illuminator 10, an one control system (not shown) and a plane lens combination 20 constitute, this illuminator 10 is by a plate printed circuit board (PCB) 101, several light-emitting diodes 102 are with planar array mode dense distribution and be linked on this plate printed circuit board (PCB) 101, and can divide into several zones by putting 30 distances apart from this illuminator one reference center, this control system is connected in this illuminator 10, wherein several light-emitting diodes 102 of this of this illuminator 10 can by this control system select arbitrarily this several zone and all both one of luminous with illumination, an and plane lens combination 20, at least one plane lens of tool place before this illuminator 10 and with it and closely link, and detect arbitrary position on the target 40 to this printed circuit board (PCB) to assemble these several light-emitting diode 102 issued lights.
Please consult Fig. 6 again, wherein this device further comprises a camera chain 50, and at least one video camera of tool is to be received from these several light-emitting diode 102 issued lights that reflected on this a detection target 40 such as the printed circuit board (PCB).This at least one video camera, this reference center that is installed on this illuminator are respectively put 30 dead asterns and are put the dead astern of 30 equidistant at least one positions respectively with this reference center.This at least one zone can be complied with and 30 distance regions of this reference center point of this illuminator 10 are divided into a central area and at least one surrounding zone.This at least one zone is except that this central area, and arbitrary in all the other surrounding zones can further comprise according to put at least one zone that 30 distances and direction are divided apart from this reference center of this illuminator 10.This control system with control in these several light-emitting diodes 102 in this at least one zone arbitrary for luminous and not luminous both one of and this at least one video camera of this camera chain 50 in arbitrary serve as start and do not start both one of shine a lighting condition of arbitrary position on this a detection target 40 such as a printed circuit board (PCB) and make up and comprise projecting direction to control this illuminator 10, angle, illumination and have the more than one light-emitting diode 102 of a regional tool at least in this at least one zone when luminous, to shine in this position with this detection target 40 be the image of center one particular range to note down this illuminator 10 by selecting at least one video camera in this at least one video camera.This particular range size depends on the size of a transducer of this video camera and the demand of detection resolution.This device further comprises at least one display of a display system tool, so that this image is shown on the display screen.And comprise above microprocessor of a microprocessor system tool, to make this image and this particular range 1 one relatively whether more variant and give record with reference to the record of image with decision.These detection target 40 alleged printed circuit board (PCB)s are meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
Please consult Fig. 5 and Fig. 6 again, the present invention also provides use one to have one group and is connected the illuminator of forming by several light-emitting diodes 102 of at least one regional dense arrangement on the plate printed circuit board (PCB) 101 10, the plane lens combination 20 that plane lens are formed more than one, one camera chain of forming by at least one video camera 50, one control system, one microprocessor system and that comprises at least one microprocessor comprises the device of display system of at least one display to detect the method for a target 40 such as a printed circuit board (PCB), its method at first will be selected a certain position on this a detection target 40 such as the printed circuit board (PCB), then then adapting to this position is that the configuration of this printed circuit board (PCB) in reference center one particular range is set lighting condition combination and comprised projecting direction, angle, illumination, and use this control system to make that at least more than one zone has more than one this light-emitting diode 102 luminous in this at least one zone of this illuminator 10, and be gathered in the position of this selection with the light that will be produced through these plane lens 20 of this illuminator 10, be combined in the position of this selection with the lighting condition that produces this setting, repeat to adapt to the illumination of this chosen position afterwards, have at least a zone more than one this light-emitting diode 102 to be arranged when luminous in this at least one zone, use this control system to shine photographic image to note down this illuminator 10 in this arbitrary position by starting at least one video camera in this camera chain 50, and these these photographic images that start 50 pairs of these chosen positions of video camera are shown on the display screen of this display system, afterwards and from this microprocessor system this chosen position one correct reference image record is taken out, and with this photographic image relatively, with decision variant existence whether, last and with this photographic image of this chosen position and comparative result variant this microprocessor system that is embedded in whether.The reference center that this camera chain 50 is installed on this illuminator 10 is respectively put 30 dead asterns and is put the dead astern of 30 equidistant at least one positions respectively with this reference center.This at least one zone can be divided into a central area and at least one surrounding zone according to putting 30 distance regions with this reference center of this illuminator 10.This at least one zone is except that this central area, and arbitrary in all the other surrounding zones can further comprise according to put at least one zone that 30 distances and direction are divided apart from this reference center of this illuminator 10.This particular range size depends on the size of a transducer of this video camera 50 and the demand of detection resolution in this method.Wherein these plane lens 20 are a Fresnel Lenses, are installed on before this several light-emitting diodes 102 and closely link with it, to assemble the arbitrary position of these several light-emitting diode 102 issued lights to this a detection target 40 such as the printed circuit board (PCB).This printed circuit board (PCB) is meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
In sum, as Fig. 5, shown in Figure 6, because optical detection apparatus of the present invention uses one to be connected in several light-emitting diodes 102 of becoming planar array shape dense distribution on the plane printed circuit board (PCB) 101 and to present luminous and luminance not by a control system that is attached thereto to control it and be divided at least one zone even can distinguish to single light-emitting diode, and be positioned at these light-emitting diode 102 the place aheads and close-connected with it plane lens combination 20 such as a Fresnel Lenses to assemble these light-emitting diode 102 issued lights arbitrary position to the printed circuit board surface of a detected target 40 such as a tool assembly by one, so this device can produce high illumination, be gathered in a sub-district and illumination uniformly, not only can set the lighting condition that detects the arbitrary select location of target, and capture pentrution that can be darker, obtain image more clearly, and can by display system show this photographic image and by microprocessor system with examined the place indifference arranged to find and to note down this with reference to image record comparison, and can be recorded in this microprocessor system, as a means of filing for reference.
The present invention has improved in the past inhomogeneous, the strong or light-emitting diode many shortcomings such as intensive inadequately that distribute inadequately of prior art luminosity, not only can be used for installing arbitrary stage in the processing procedure of electronic component on printed circuit board (PCB), to detect printed circuit board (PCB) and to go up assembly not blemishes are arranged, insecure etc. such as wrong part, neglected loading, installation, and can be used for other must optical detection on the article on surface, as the detection of dust particle on the chip etc.
Claims (10)
1. a device that detects printed circuit board (PCB) is characterized in that, comprises:
One illuminator, tool one plate printed circuit board (PCB), several light-emitting components are with planar array mode dense distribution and be linked on this plate printed circuit board (PCB), and can be by dividing at least one zone apart from this illuminator one reference center point distance;
One control system is connected in this illuminator, and wherein several light-emitting components of these of this illuminator can select this at least one zone luminous with illumination by this control system; And
One plane lens combination, at least one plane lens of tool place before this illuminator and with tight binding, to assemble these several light-emitting component issued lights arbitrary position to this printed circuit board (PCB).
2. device as claimed in claim 1 is characterized in that, these several light-emitting components are light-emitting diode.
3. device as claimed in claim 1 is characterized in that, these plane lens are Fresnel Lenses.
4. device as claimed in claim 1 is characterized in that this device further comprises a camera chain, and at least one video camera of tool is to be received from these several light-emitting component issued lights that reflected on this printed circuit board (PCB).
5. device as claimed in claim 4 is characterized in that,
This video camera be installed on respectively this reference center point dead astern of this illuminator and respectively with the dead astern of equidistant several positions of this reference center point;
This at least one zone can be divided into a central area and at least one surrounding zone according to this reference center dot spacing abscission zone with this illuminator;
This at least one zone is except that this central area, and comply with at least one zone of dividing apart from this central point distance and the direction of this illuminator arbitrary can further the comprising in all the other surrounding zones;
This control system with control in these several light-emitting components in this at least one zone arbitrary for luminous and not luminous both one of and this video camera of this camera chain in arbitrary serve as start with do not start both one of shine a lighting condition of arbitrary position on this printed circuit board (PCB) and make up and comprise projecting direction to control this illuminator, angle, illumination and when to have the more than one light-emitting component of a regional tool at least in this at least one zone be luminous is by selecting at least one video camera to shine in being the image of center one particular range with this position to note down this illuminator in this at least one video camera;
This particular range size depends on the size of a transducer of this video camera and the demand of detection resolution;
This device further comprises at least one display of a display system tool, so that this image is shown on the display screen; And/or
Whether this device further comprises at least one microprocessor system, relatively more variant and give record with decision the record of the image of this image and one reference of this particular range is made one.
6. device as claimed in claim 1 is characterized in that, this printed circuit board (PCB) is meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
One kind use a tool one in the plane by the device of the display system of the microprocessor system of the camera chain of the illuminator of at least one regional several light-emitting diodes of dense arrangement, lens combination that at least one plane lens are formed, an at least one video camera, a control system, an at least one microprocessor and an at least one display to detect the method for a printed circuit board (PCB), it is characterized in that this method comprises the following step:
(a) select a certain position on this printed circuit board (PCB);
(b) adapting to this position is that this printed circuit panel configuration is set lighting condition combination and comprised projecting direction, angle, illumination in reference center one particular range;
(c) use this control system to make that there is more than one this lumination of light emitting diode at least more than one zone in this at least one zone of this illuminator, and be gathered in the position of this selection through these plane lens of this illuminator with the light that will be produced, with the lighting condition that produces this setting in the position of this selection;
(d) adapt to the illumination of this chosen position, when having at least a zone to have more than one this light-emitting component luminous in this at least one zone, use this control system to shine photographic image to note down this illuminator in this arbitrary position by starting at least one video camera in this at least one video camera;
(e) this lighting condition that adapts to this chosen position makes up, and these startup video cameras this photographic image to this chosen position is shown on the display screen of this display system; And
(f) this microprocessor system is taken out the record of the image of this chosen position one reference certainly, and with this photographic image relatively, with decision variant existence whether;
(g) with this photographic image of this chosen position and whether variant, be embedded in this microprocessor system with reference to the image comparative result.
8. method as claimed in claim 7 is characterized in that, at least one video camera of this camera chain, be installed on respectively a reference center point dead astern of this illuminator and respectively with the dead astern of the equidistant at least one position of this reference center point.
9. method as claimed in claim 7, it is characterized in that, these plane lens are a Fresnel Lenses in this step (c), are installed on before these several light-emitting diodes and closely link with it, to assemble the arbitrary position of these several light-emitting diode issued lights to this printed circuit board (PCB).
10. method as claimed in claim 7 is characterized in that, this printed circuit board (PCB) is meant that one installs the printed circuit board (PCB) in arbitrary stage in the electronic component processing procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03149136 CN1568132A (en) | 2003-06-18 | 2003-06-18 | Apparatus and method for optical detecting of printed circuit board |
Applications Claiming Priority (1)
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| CN 03149136 CN1568132A (en) | 2003-06-18 | 2003-06-18 | Apparatus and method for optical detecting of printed circuit board |
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| CN1568132A true CN1568132A (en) | 2005-01-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245011A (en) * | 2010-04-27 | 2011-11-16 | 株式会社日立高新技术仪器 | Electronic component installing method and device thereof |
| CN104884936A (en) * | 2012-09-14 | 2015-09-02 | Jx日矿日石金属株式会社 | Device for evaluating surface state of metal material, device for evaluating visibility of transparent substrate, evaluation program thereof, and computer-readable recording medium recording same |
| CN114354498A (en) * | 2022-03-21 | 2022-04-15 | 成都数联云算科技有限公司 | Design method of light source for welding spot detection and welding spot detection device |
-
2003
- 2003-06-18 CN CN 03149136 patent/CN1568132A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245011A (en) * | 2010-04-27 | 2011-11-16 | 株式会社日立高新技术仪器 | Electronic component installing method and device thereof |
| CN104884936A (en) * | 2012-09-14 | 2015-09-02 | Jx日矿日石金属株式会社 | Device for evaluating surface state of metal material, device for evaluating visibility of transparent substrate, evaluation program thereof, and computer-readable recording medium recording same |
| CN104884936B (en) * | 2012-09-14 | 2017-10-03 | Jx日矿日石金属株式会社 | The evaluating apparatus of the surface state of metal material, the visibility evaluating apparatus of transparent base, its assessment process and record have its computer-readable recording medium |
| CN114354498A (en) * | 2022-03-21 | 2022-04-15 | 成都数联云算科技有限公司 | Design method of light source for welding spot detection and welding spot detection device |
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