CN201307187Y - Non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system - Google Patents
Non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system Download PDFInfo
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- CN201307187Y CN201307187Y CNU2008202174578U CN200820217457U CN201307187Y CN 201307187 Y CN201307187 Y CN 201307187Y CN U2008202174578 U CNU2008202174578 U CN U2008202174578U CN 200820217457 U CN200820217457 U CN 200820217457U CN 201307187 Y CN201307187 Y CN 201307187Y
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Abstract
The utility model discloses a non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system, which is characterized in that the system is provided with a CCD camera, wherein a non-uniform optical filtering sheet is arranged outside a lens of the CCD camera; the light transmission rate of the non-uniform filtering sheet is gradually reduced from both ends of the optical filtering sheet to the middle part of the filtering sheet, and the light which is transmitted by the optical filtering sheet is uniform. The non-uniform transmission film is arranged on the surface of the CCD camera, so that the non-uniformity of the illumination brightness can be compensated, and the arc illumination is straightened, thereby improving the detection performance of CCD, and saving the resource of the computer, and controlling the calculation cost.
Description
Technical field:
The utility model relates generally to a kind of CCD illumination camber line correction system based on non-homogeneous optical filtering technique.
Background technology:
In agricultural product sorting field, along with the development of photoelectric technology, the color selector technology reaches its maturity, and becomes the gordian technique of agricultural product material sorting.No matter at rice, melon seeds, tealeaves, coarse cereals color selector, or other coarse cereals color selectors, its critical piece all is photoelectric sensor or CCD camera.Though CCD look choosing cost height, performance is good, and is applied widely, and the resolving power height has become an important development direction of color selector.CCD relies on optical lens imaging, particularly wide-angle lens, and the linear array edge effect that structured light causes is serious, that is, by lens imaging on CCD, equal direction of illumination, the imaging edge is dark on the CCD image planes, and is middle strong.Therefore, in color selector and digital camera, need to adopt in addition the computing machine correction program to proofread and correct this illumination arc imaging illumination curve and (generally can cast out the low pixel elements of illumination, that is, adopt intermediate light, dwindle due look and selected scope according to level and smooth district pixel.)。This software correction method is adopted and is amplified two end signals, the method for dwindling M signal, though can access a comparatively straight straight line, variation has taken place in the signal to noise ratio (S/N ratio) of signal on whole straight line, is unfavorable for sorting, also can raise the cost.
The utility model content:
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of color selector CCD illumination camber line corrective system based on non-homogeneous optical filtering technique to be provided, and it can be evened up the arc Illumination Distribution, and is effective, has saved computer resource, has controlled cost.
The utility model is achieved through the following technical solutions:
Color selector CCD illumination camber line corrective system based on non-homogeneous optical filtering technique, it is characterized in that: include the CCD camera, CCD camera minute surface has non-homogeneous optical filter outward, from the two ends of described optical filter to the optical filter middle part, to low gradual change, the light of mating plate transmission is even light to its transmittance after filtration from height.
Color selector CCD illumination camber line corrective system based on non-homogeneous optical filtering technique, it is characterized in that: from the two ends of described optical filter to the optical filter middle part, its transmittance is meant from height to low gradual change: from the two ends of optical filter to medium line, to low gradual change, the light of mating plate transmission is even light to transmittance after filtration from height; Or to interlude, to low gradual change, the transmittance of interlude is constant from height for transmittance from the two ends of optical filter, and the light of mating plate transmission is even light after filtration; Transmittance is to realize by the film that pastes different transmittances at transmitting substrate from height to low gradual change.
A little less than the illuminance two ends that the CCD camera receives, middle strong, make that CCD imaging figure line also is that two ends are dark, middle bright.The utility model is exactly to add an optical filter heterogeneous in face of the CCD camera, in the middle of making, this kind optical filter advances the light light intensity decreasing, the light light intensity of advancing at two ends remains unchanged, the light that makes CCD collect is uniform luminance, thereby the signal figure line that CCD is collected is a straight straight line, because the decline to some extent on the light intensity direction of this straight line, therefore, as long as improve whole intensity of illumination, this CCD acquired signal line can be brought up to desirable position.
The utility model has the advantages that:
The utility model adds the non-homogeneous optical filter of a slice on CCD phase machine side, offset the even property of uneven illumination, and the arc Illumination Distribution is evened up, and has improved CCD and has detected performance, has saved computer resource, and has controlled and assess the cost.
Description of drawings:
Accompanying drawing 2 is a CCD image planes glazing illumination curve image.
The accompanying drawing 3 non-homogeneous diaphragm illumination transmitance images that see through.
Accompanying drawing 4 is an illumination curve before the CCD imaging surface.
Accompanying drawing 5 is an illumination curve image before the CCD imaging surface.
Accompanying drawing 6 is the filter sheet structure synoptic diagram.
Embodiment:
Color selector CCD illumination camber line corrective system based on non-homogeneous optical filtering technique, include CCD camera 1, the camera minute surface has non-homogeneous optical filter 2 outward, optical filter 2 is to post bar shaped diaphragm 3 on the transmitting substrate top layer, the transmitance of bar shaped diaphragm 3 weakens in the middle of two side direction successively, the light of mating plate 2 transmissions is even light after filtration, the light that makes CCD collect is uniform luminance, the signal figure line that CCD is collected is a straight straight line, because this straight line descends on the light intensity direction to some extent, therefore, as long as improve whole intensity of illumination, this CCD acquired signal line can be brought up to desirable position.
Claims (2)
1, based on the color selector CCD illumination camber line corrective system of non-homogeneous optical filtering technique, it is characterized in that: include the CCD camera, CCD camera minute surface has non-homogeneous optical filter outward, from the two ends of described optical filter to the optical filter middle part, to low gradual change, the light of mating plate transmission is even light to its transmittance after filtration from height.
2, the color selector CCD illumination camber line corrective system based on non-homogeneous optical filtering technique according to claim 1, it is characterized in that: from the two ends of described optical filter to the optical filter middle part, its transmittance is meant from height to low gradual change: from the two ends of optical filter to medium line, to low gradual change, the light of mating plate transmission is even light to transmittance after filtration from height; Or to interlude, to low gradual change, the transmittance of interlude is constant from height for transmittance from the two ends of optical filter, and the light of mating plate transmission is even light after filtration; Transmittance is to realize by the film that pastes different transmittances at transmitting substrate from height to low gradual change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202174578U CN201307187Y (en) | 2008-11-28 | 2008-11-28 | Non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202174578U CN201307187Y (en) | 2008-11-28 | 2008-11-28 | Non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201307187Y true CN201307187Y (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202174578U Expired - Fee Related CN201307187Y (en) | 2008-11-28 | 2008-11-28 | Non-uniform optical filtering technology-based color selector CCD illumination pitch arc correcting system |
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| CN (1) | CN201307187Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508144A (en) * | 2011-10-26 | 2012-06-20 | 西安电子科技大学 | Method for measuring dark signal non-uniformity and photon response non-uniformity of photons of CCD (charge coupled device) chip |
| CN105203458A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Image processing device of blood analyzer |
| CN105203459A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Filter plate for hematology analyzer |
| CN105988025A (en) * | 2015-03-20 | 2016-10-05 | 旺矽科技股份有限公司 | Multi-unit test probe card with illumination adjustment mechanism and illumination adjustment method thereof |
| CN108325873A (en) * | 2017-12-27 | 2018-07-27 | 合肥市硕理机电科技有限公司 | A kind of pixel for laser color selector divides device |
| WO2019075935A1 (en) * | 2017-10-18 | 2019-04-25 | 深圳市绎立锐光科技开发有限公司 | Light source system and lighting apparatus |
| CN115623341A (en) * | 2021-07-12 | 2023-01-17 | 豪威科技股份有限公司 | Image sensor with a plurality of pixels |
-
2008
- 2008-11-28 CN CNU2008202174578U patent/CN201307187Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508144A (en) * | 2011-10-26 | 2012-06-20 | 西安电子科技大学 | Method for measuring dark signal non-uniformity and photon response non-uniformity of photons of CCD (charge coupled device) chip |
| CN105988025A (en) * | 2015-03-20 | 2016-10-05 | 旺矽科技股份有限公司 | Multi-unit test probe card with illumination adjustment mechanism and illumination adjustment method thereof |
| CN105203458A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Image processing device of blood analyzer |
| CN105203459A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Filter plate for hematology analyzer |
| WO2019075935A1 (en) * | 2017-10-18 | 2019-04-25 | 深圳市绎立锐光科技开发有限公司 | Light source system and lighting apparatus |
| US11248773B2 (en) | 2017-10-18 | 2022-02-15 | Ylx Incorporated | Light source system and lighting apparatus |
| US11592159B2 (en) | 2017-10-18 | 2023-02-28 | Ylx Incorporated | Light source system and lighting apparatus |
| CN108325873A (en) * | 2017-12-27 | 2018-07-27 | 合肥市硕理机电科技有限公司 | A kind of pixel for laser color selector divides device |
| CN115623341A (en) * | 2021-07-12 | 2023-01-17 | 豪威科技股份有限公司 | Image sensor with a plurality of pixels |
| CN115623341B (en) * | 2021-07-12 | 2024-04-26 | 豪威科技股份有限公司 | Image sensor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20121128 |