CN108174098A - A kind of dust detection and method - Google Patents
A kind of dust detection and method Download PDFInfo
- Publication number
- CN108174098A CN108174098A CN201711472347.6A CN201711472347A CN108174098A CN 108174098 A CN108174098 A CN 108174098A CN 201711472347 A CN201711472347 A CN 201711472347A CN 108174098 A CN108174098 A CN 108174098A
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- polarizer
- video camera
- light source
- computer
- dust
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses the high grade of transparency dust detections and method on a kind of transparent panel.Described device, including light source, the first polarizer, the second polarizer, supporting table, video camera, computer, the light source is placed in below supporting table, the video camera is placed in the top of supporting table, the video camera is connect with computer, the polarization direction of first polarizer is vertical with the polarization direction of the second polarizer, and first polarizer is placed at the light exit of light source, before second polarizer is placed in the camera lens of video camera.The invention is particularly suited to detect the high dust of transparency, testing principle science is novel, and method is simple and practicable.
Description
Technical field
The invention belongs to detection field, high grade of transparency dust detection and side on more particularly to a kind of transparent panel
Method.
Background technology
In display device manufacture and other optics with precision instrument manufacture with studying industry, often on transparent panel
Cleanliness factor require, that is, need whether have dust in detection panel.Since the transparency height of dust is different, for transparency
Low dust is relatively simple to detect, and the dust that transparency is high, and there has been no preferable detection methods at present, can only be blindly
Dedusting.In fact, many dust particles, due to thickness very little, transparency is often higher, it is difficult to detect.
Invention content
In order to solve the above technical problem, the present invention provides a kind of dust detection and method, particularly suitable for inspection
The high dust of transparency is surveyed, testing principle science is novel, and method is simple and practicable.
The technical solution adopted by the present invention is as follows：
A kind of dust detection, including light source, the first polarizer, the second polarizer, supporting table, video camera, computer, the light
Source is placed in below supporting table, and the video camera is placed in the top of supporting table, and the video camera is connect with computer, first polarization
The polarization direction of piece is vertical with the polarization direction of the second polarizer, and first polarizer is placed at the light exit of light source, described
Before second polarizer is placed in the camera lens of video camera.
A kind of detection method using dust detection described above includes the following steps：
Step S1, measured panel is placed in supporting table；
Step S2 opens light source, video camera and computer；
Step S3 adjusts the focal length of video camera, it is made to focus in the measured panel in supporting table, due to the first polarizer and
The polarization direction of two polarizers is orthogonal, therefore should not have light to pass through, if measured panel at this time without dust,
Full black state is should be, is where dust at bright spot, the obtained image of video camera is handled with computer record；
Measured panel is rotated horizontally 90 degree, repeats step S3 by step S4, to avoid due to leakage caused by colour developing polarization angle
Inspection, the first polarizer are remained stationary as with the second polarizer；
Step S5, closes light source, video camera, computer, and detection is completed.
Advantageous effect：
A kind of dust detection provided by the invention and method due to the high dust of transparency or have diffusing characteristic diffuser,
There is colour developing polarization characteristic.This method utilizes both different characteristics of these dusts, and by polarized light approach, it is carried out
Detection.Polarized light source is generated first, by polarizing light irradiation in target to be checked, then with by vertical with light source polarization angle
Polarizer observes target to be checked, is then again rotated by 90 ° target to be checked and observes target to be checked again, without ash in target to be checked
There is the position of dust at the position of dirt since polarised light is blocked in black, and diffusion is necessarily generated to light or colour developing polarizes, nothing
Diffusion is generated to light by dust or colour developing polarizes, can all change original properties of polarized light, bright spot is presented, is then detected
Come.Why need target to be checked being rotated by 90 ° and detect again, be the colour developing because of some dusts when detection for the first time
Polarization angle is exactly in dark space, testing result unobvious, and makes it easy to detect after being rotated by 90 °, and avoids missing inspection.
Description of the drawings
Fig. 1 is a kind of structure chart of dust detection provided in an embodiment of the present invention；
Fig. 2 is the first polarizer and the second polarizer and the mutual alignment relation schematic diagram of measured panel；
Fig. 3 is the first polarizer and the second polarizer and the mutual alignment relation schematic diagram of measured panel；
In figure：
1- light sources；The first polarizers of 2-；The second polarizers of 3-；4- supporting tables；5- video cameras；6- computers.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawings and examples as follows：
Embodiment 1：
As shown in Figure 1, a kind of dust detection of the present invention, including light source 1, the first polarizer 2, the second polarizer 3,
Supporting table 4, video camera 5, computer 6, the light source 1 are placed in 4 lower section of supporting table, and the video camera 5 is placed in the top of supporting table 4,
The video camera 5 is connect with computer 6, and the polarization direction of first polarizer 2 is vertical with the polarization direction of the second polarizer 3,
First polarizer 2 is placed at the light exit of light source 1, before second polarizer 3 is placed in the camera lens of video camera 5.
Embodiment 2：
The present embodiment is embodiment of the method, belongs to same technical concept with 1 device embodiment of above-described embodiment, in the present embodiment
The content of not detailed description, refers to device embodiment 1.
A kind of detection method using detection device described in embodiment 1 includes the following steps：Step S1, by tested surface
Plate 7 is placed in supporting table 4；
Step S2 opens light source 1, video camera 5 and computer 6；
Step S3 adjusts the focal length of video camera 5, it is made to focus in the measured panel 7 in supporting table 4, due to the first polarizer 2
It is orthogonal with the polarization direction of the second polarizer 3, therefore should not there is light to pass through, the first polarizer 2 and second is inclined at this time
Shake piece 3 and correlation such as Fig. 2 of measured panel 7, and the polarization angle of the first polarizer 2 and the second polarizer 3 is orthogonal,
Measured panel 7 is between the first polarizer 2 and the second polarizer 3.If measured panel 7 at this time should be without dust
Full black state is where dust at bright spot, records processing 5 obtained image of video camera with computer 6 to detect smaller, meat
The dust that eye can not detect；
Measured panel 7 is rotated horizontally 90 degree, repeats step S3 by step S4, to avoid due to leakage caused by colour developing polarization angle
It examines, at this time the first polarizer 2 and the second polarizer 3 and correlation such as Fig. 3 of measured panel 7, the first polarizer 2 and second
Polarizer 3 remains stationary as, and only measured panel 7 has rotated horizontally 90 degree；
Step S5, closes light source 1, video camera 5, computer 6, and detection is completed.
Although the present invention detailed example and has described relevant specific embodiment and has made reference, to the technology of this field
It,, can be in coupling in thought and range without departing substantially from the present invention after the description and the appended drawings are read and understood for personnel
It closes the structure of alignment device and makes and be variously modified in details.The claim that these changes fall within the present invention is wanted
The protection domain asked.
Claims (2)
1. a kind of dust detection, which is characterized in that including light source (1), the first polarizer (2), the second polarizer (3), branch
Platform (4), video camera (5), computer (6) are supportted, the light source (1) is placed in below supporting table (4), and the video camera (5) is placed in support
The top of platform (4), the video camera (5) connect with computer (6), the polarization direction of first polarizer (2) and the second polarization
The polarization direction of piece (3) is vertical, and first polarizer (2) is placed at the light exit of light source (1), second polarizer (3)
Before being placed in the camera lens of video camera (5).
2. a kind of detection method using dust detection described in claim 1, which is characterized in that include the following steps：
Measured panel (7) is placed in supporting table (4) by step S1；
Step S2 opens light source (1), video camera (5) and computer (6)；
Step S3 adjusts the focal length of video camera (5), it is made to focus in the measured panel (7) in supporting table (4), due to first
Polarizer (2) and the polarization direction of the second polarizer (3) are orthogonal, therefore should not have light to pass through, tested surface at this time
Plate (7) should be full black state if without dust, is where dust at bright spot, processing video camera is recorded with computer (6)
(5) obtained image；
Measured panel (7) is rotated horizontally 90 degree, repeats step S3 by step S4, to avoid due to caused by colour developing polarization angle
Missing inspection, the first polarizer (2) are remained stationary as with the second polarizer (3)；
Step S5, closes light source (1), video camera (5), computer (6), and detection is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472347.6A CN108174098A (en) | 2017-12-29 | 2017-12-29 | A kind of dust detection and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472347.6A CN108174098A (en) | 2017-12-29 | 2017-12-29 | A kind of dust detection and method |
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| Publication Number | Publication Date |
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| CN108174098A true CN108174098A (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711472347.6A Withdrawn CN108174098A (en) | 2017-12-29 | 2017-12-29 | A kind of dust detection and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111292537A (en) * | 2018-12-06 | 2020-06-16 | 中国科学院长春光学精密机械与物理研究所 | Night license plate recognition system and method |
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| CN203432922U (en) * | 2013-05-07 | 2014-02-12 | 成都泓睿科技有限责任公司 | Device for detecting foreign substances in transparent bottled liquid |
| CN103674798A (en) * | 2013-12-30 | 2014-03-26 | 合肥京东方光电科技有限公司 | Air dust detection instrument |
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| CN104007116A (en) * | 2013-02-21 | 2014-08-27 | 欧姆龙株式会社 | Defect inspection device and defect inspection method |
| CN205982123U (en) * | 2016-07-25 | 2017-02-22 | 孙淑英 | Adj. tabular product surface defect polarized light imaging system |
| CN106556607A (en) * | 2015-09-30 | 2017-04-05 | 苍南县三维电子塑胶有限公司 | The device and method of identification panel surface dust |
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- 2017-12-29 CN CN201711472347.6A patent/CN108174098A/en not_active Withdrawn
Patent Citations (9)
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|---|---|---|---|---|
| US7838285B1 (en) * | 2006-04-24 | 2010-11-23 | Maven Biotechnologies LLC | Imaging electrophoresis system |
| CN101849207A (en) * | 2007-12-07 | 2010-09-29 | 日东电工株式会社 | Liquid crystal panel and liquid crystal display device |
| CN201795784U (en) * | 2010-09-03 | 2011-04-13 | 无锡市奥达光电子有限责任公司 | Device for measuring optical axis angle of polarization characteristic component |
| CN104007116A (en) * | 2013-02-21 | 2014-08-27 | 欧姆龙株式会社 | Defect inspection device and defect inspection method |
| CN203432922U (en) * | 2013-05-07 | 2014-02-12 | 成都泓睿科技有限责任公司 | Device for detecting foreign substances in transparent bottled liquid |
| CN103674798A (en) * | 2013-12-30 | 2014-03-26 | 合肥京东方光电科技有限公司 | Air dust detection instrument |
| CN103839325A (en) * | 2014-03-11 | 2014-06-04 | 威海华菱光电股份有限公司 | Image detection device |
| CN106556607A (en) * | 2015-09-30 | 2017-04-05 | 苍南县三维电子塑胶有限公司 | The device and method of identification panel surface dust |
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| CN111292537A (en) * | 2018-12-06 | 2020-06-16 | 中国科学院长春光学精密机械与物理研究所 | Night license plate recognition system and method |
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Application publication date: 20180615 |
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