CN203836753U - Optical illumination system for scanning of linear CCD - Google Patents
Optical illumination system for scanning of linear CCD Download PDFInfo
- Publication number
- CN203836753U CN203836753U CN201420216263.1U CN201420216263U CN203836753U CN 203836753 U CN203836753 U CN 203836753U CN 201420216263 U CN201420216263 U CN 201420216263U CN 203836753 U CN203836753 U CN 203836753U
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- linear
- fresnel lens
- lighting system
- linear light
- reflective mirror
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- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 238000005286 illumination Methods 0.000 title abstract description 12
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 6
- 150000002367 halogens Chemical class 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000011514 reflex Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- Microscoopes, Condenser (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The utility model discloses an optical illumination system for the scanning of a linear CCD, and the system comprises at least a first linear light source, a second light source, a third light source, at least one light splitter mirror, at least second and third Fresnel lenses, and at least second and third reflective mirrors. The first, second and third linear light sources are respectively disposed exactly above a to-be-tested object, on the front surface of the to-be-tested object and on the rear surface of the to-be-tested object, are arranged horizontally, and irradiate the right top surface, the front surface and the rear surface of the to-be-tested object at the same time, thereby achieving shadowless illumination. The first, second and third light sources are respectively formed by the cooperation of a low-power halogen lamp and a fiber. The system provided by the utility model is high in uniformity, is large in angle of incidence, and can achieve three-dimensional illumination of the front and side surfaces of the to-be-tested object. The reflected light of a scanned object directly enters into the CCD for imaging with no need of an optical filter. The system is wide in resolution range, has low limits and requirements for a scanned material, is simple in optical path structure, is low in energy consumption, is high in energy rate, and is long in service life.
Description
Technical field
The utility model relates to a kind of linear CCD scanning optical lighting system, is applied to a kind of circuit board automatic optical detection device, and the omnibearing stereo illumination to object to be detected is provided when scanning for linear CCD, belongs to electronic manufacturing field.
Background technology
The scanning of the existing linear CCD for circuit board automatic optical detection device is all very complicated by the most of structures of optical lighting system, and manufacture, use cost are high.Mainly contain on the market at present two kinds:
One, bring and realize linear optically focused with LED lamp, because it has very high requirement to illumination uniformity, so the LED on each lamp band all needs through strict screening, once and have a wherein LEDs to break down after using, whole piece LED lamp band need be replaced, cause like this manufacturing cost and use cost all very high;
Two, use high power Halogen lamp LED as light source, form required illumination by complicated light path, its manufacturing cost is high, and illumination intensity is inadequate, need power (generally needing 250W) or number (generally needing 5) by improving Halogen lamp LED to reach necessary brightness, must cause like this energy consumption of optical detection apparatus high, energy rate is low.
Therefore, providing that a kind of light path is simple, energy consumption is low, energy rate is high, cut and the linear CCD scanning optical lighting system of long service life, is industry problem demanding prompt solution.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide that a kind of light path is simple, energy consumption is low, energy rate is high and the linear scan optical lighting system of long service life, this system illumination uniformity is high, incidence angle is large, can form three-dimensional illumination positive and side to object to be detected, and the reverberation of sweep object directly enters CCD imaging, without optical filter, resolution scope is wide, requires low to being scanned materials limitations.
In order to achieve the above object, technical solution adopted in the utility model is:
A kind of linear CCD scanning optical lighting system, comprises at least first, second, third linear light sorurce, at least one spectroscope, at least second, third Fresnel lens and second, third reflective mirror at least;
Described first, second, third linear light sorurce be arranged at respectively object to be detected directly over, leading flank and trailing flank, and be all horizontally disposed with.
This optical lighting system is made up of at least three linear light sorurces, simultaneously to object to be detected just above, leading flank and trailing flank irradiate, and accomplishes shadowless lighting.
As one of preferred version of the present utility model, described first, second, third linear light sorurce coordinates formation with optical fiber by low-power Halogen lamp LED, particularly form by fiber optic conduction.
As one of preferred version of the present utility model, described spectroscope is arranged at the front upper place of the first linear light sorurce.
As one of preferred version of the present utility model, the dead ahead of described the first linear light sorurce is also provided with a speculum.
As one of preferred version of the present utility model, described the second Fresnel lens is arranged at the front upper place of the second linear light sorurce, and described the second reflective mirror is arranged at the dead ahead of the second Fresnel lens; Described the 3rd Fresnel lens is arranged at the front upper place of the 3rd linear light sorurce, and described the 3rd reflective mirror is arranged at the dead ahead of the 3rd Fresnel lens.Use Fresnel lens to replace traditional spherical lens, can reduce the size of equipment, so cost-saving, and Fresnel lens can do fine setting up and down simultaneously, plays the effect of light regulating convergent point.
As one of preferred version of the present utility model, described second, third Fresnel lens all vertically arranges, described second, third reflective mirror is all horizontally disposed with, and the focus of described second, third Fresnel lens overlaps with the perifocus of second, third speculum respectively.
Further, described second, third reflective mirror is elliptical reflector, can adopt plastic material, has the advantages such as light, low cost.
Further, the reflecting surface of described second, third reflective mirror all scribbles plated film, in playing reflex, can play good even light action.
Compared with prior art, the utlity model has the advantages such as the uniformity is high, incidence angle is large, can form three-dimensional illumination positive and side to object to be detected, and the reverberation of sweep object directly enters CCD imaging, without optical filter, resolution scope is wide, and low to being scanned materials limitations requirement, light channel structure is simple, energy consumption is low, energy rate is high and long service life.
Brief description of the drawings
For architectural feature of the present utility model and technical essential are described, below in conjunction with the drawings and specific embodiments, design feature of the present utility model is described in further detail.
Fig. 1 is the structural representation of the disclosed linear CCD scanning of the utility model embodiment optical lighting system.
Description of reference numerals: 1-the first linear light sorurce, 11-spectroscope, 12-speculum, 2-the second linear light sorurce, 21-the second Fresnel lens, 22-the second reflective mirror, 3-the 3rd linear light sorurce, 31-the 3rd Fresnel lens, 32-the 3rd reflective mirror.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further elaborated:
Shown in Figure 1, for the linear CCD scanning optical illuminator for automatic optical detector of the present embodiment, it comprises the first linear light sorurce 1, the second linear light sorurce 2, the 3rd linear light sorurce 3, spectroscope 11, the second Fresnel lens 21, the 3rd Fresnel lens 31 and the second reflective mirror 22, the 3rd reflective mirror 32.The first linear light sorurce 1, the second linear light sorurce 2, the 3rd linear light sorurce 3 simultaneously to object to be detected just above, leading flank and trailing flank irradiate, accomplish shadowless lighting, the imaging after object to be detected reflection directly arrives CCD linear imaging sensor by spectroscope 11.The first linear light sorurce 1, the second linear light sorurce 2, the 3rd linear light sorurce 3 form by fiber optic conduction by low-power Halogen lamp LED.
Vertical direct projection is only formed by refraction by the first linear light sorurce 1 of horizontal positioned, and the light that the first linear light sorurce 1 sends passes through speculum 12, and the light that reflexes to spectroscope 11,30% is at spectroscope 11 again after secondary reflection, and vertical irradiation in 90 ° is to object to be detected.
Described spectroscope 11 has two effects, and the light that the first linear light sorurce 1 that reflection levels is placed is come via speculum 12, makes its vertical sand shooting to object to be detected; Reflect the imaging light of object to be detected simultaneously, make it arrive CCD camera, its refractive index of 70% and 30% reflectivity, can make CCD obtain best image.
Frontside illuminated, only by the second linear light sorurce 2, forms via the second Fresnel lens 21, the second reflective mirror 22 refractions, and corresponding, rear side light irradiation is by the 3rd linear light sorurce 3, forms via the 3rd Fresnel lens 31, the three reflective mirror 32 refractions.
Described the second Fresnel lens 21 is vertically arranged at the front upper place of the second linear light sorurce 2, and the second reflective mirror 22 is horizontally placed on the dead ahead of the second Fresnel lens 21, and the focus of the second Fresnel lens 21 overlaps with the perifocus of the second speculum 22; Corresponding, described the 3rd Fresnel lens 31 is vertically arranged at the front upper place of the 3rd linear light sorurce 3, and the 3rd reflective mirror 32 is horizontally placed on the dead ahead of the 3rd Fresnel lens 31, and the focus of the 3rd Fresnel lens 31 overlaps with the perifocus of the 3rd speculum 32.Use Fresnel lens to replace traditional spherical lens, can reduce the size of equipment, so cost-saving, and Fresnel lens can do fine setting up and down simultaneously, plays the effect of light regulating convergent point.Further, the second reflective mirror 22, the 3rd reflective mirror 32 are elliptical reflector, can adopt plastic material, there is the advantages such as light, low cost, and the light that can make like this perifocus transmitting converges at the over focus of elliptical reflector after via elliptical reflector, light finally irradiates in effective scanning area.
Further, the reflecting surface of the second reflective mirror 22, the 3rd reflective mirror 32 all scribbles the plated film of a precision, in playing reflex, can play good even light action.
In sum, the present embodiment uniformity is high, incidence angle is large, can form three-dimensional illumination positive and side to object to be detected, and the reverberation of sweep object directly enters CCD imaging, without optical filter, resolution scope is wide, low to being scanned materials limitations requirement, light channel structure is simple, energy consumption is low, energy rate is high and long service life.
Above-mentioned detailed description of the invention; be only explanation technical conceive of the present utility model and architectural feature; object is to allow stakeholder implement according to this; but above said content does not limit protection domain of the present utility model; any equivalence that every foundation Spirit Essence of the present utility model is done changes or modifies, within all should falling into protection domain of the present utility model.
Claims (8)
1. a linear CCD scanning optical lighting system, it is characterized in that, the scanning of this linear CCD comprises at least first, second, third linear light sorurce, at least one spectroscope, at least second, third Fresnel lens and second, third reflective mirror at least with optical lighting system;
Described first, second, third linear light sorurce be arranged at respectively object to be detected directly over, leading flank and trailing flank, and be all horizontally disposed with.
2. linear CCD scanning optical lighting system according to claim 1, is characterized in that, described first, second, third linear light sorurce coordinates formation with optical fiber by low-power Halogen lamp LED.
3. linear CCD scanning optical lighting system according to claim 1, is characterized in that, described spectroscope is arranged at the front upper place of the first linear light sorurce.
4. linear CCD scanning optical lighting system according to claim 1, is characterized in that, the dead ahead of described the first linear light sorurce is also provided with a speculum.
5. linear CCD scanning optical lighting system according to claim 1, is characterized in that, described the second Fresnel lens is arranged at the front upper place of the second linear light sorurce, and described the second reflective mirror is arranged at the dead ahead of the second Fresnel lens; Described the 3rd Fresnel lens is arranged at the front upper place of the 3rd linear light sorurce, and described the 3rd reflective mirror is arranged at the dead ahead of the 3rd Fresnel lens.
6. linear CCD scanning optical lighting system according to claim 5, it is characterized in that, described second, third Fresnel lens all vertically arranges, described second, third reflective mirror is all horizontally disposed with, and the focus of described second, third Fresnel lens overlaps with the perifocus of second, third speculum respectively.
7. according to linear CCD scanning optical lighting system described in claim 5 or 6, it is characterized in that, described second, third reflective mirror is elliptical reflector.
8. linear CCD scanning optical lighting system according to claim 7, is characterized in that, the reflecting surface of described second, third reflective mirror all scribbles plated film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216263.1U CN203836753U (en) | 2014-04-29 | 2014-04-29 | Optical illumination system for scanning of linear CCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216263.1U CN203836753U (en) | 2014-04-29 | 2014-04-29 | Optical illumination system for scanning of linear CCD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836753U true CN203836753U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420216263.1U Expired - Lifetime CN203836753U (en) | 2014-04-29 | 2014-04-29 | Optical illumination system for scanning of linear CCD |
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| Country | Link |
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| CN (1) | CN203836753U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939806A (en) * | 2014-04-29 | 2014-07-23 | 康代影像科技(苏州)有限公司 | Optical illumination system for linear CCD scanning |
-
2014
- 2014-04-29 CN CN201420216263.1U patent/CN203836753U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939806A (en) * | 2014-04-29 | 2014-07-23 | 康代影像科技(苏州)有限公司 | Optical illumination system for linear CCD scanning |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
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| CX01 | Expiry of patent term |