CN201594069U - Detection-used lighting source applying polarized light - Google Patents
Detection-used lighting source applying polarized light Download PDFInfo
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- CN201594069U CN201594069U CN2010200593663U CN201020059366U CN201594069U CN 201594069 U CN201594069 U CN 201594069U CN 2010200593663 U CN2010200593663 U CN 2010200593663U CN 201020059366 U CN201020059366 U CN 201020059366U CN 201594069 U CN201594069 U CN 201594069U
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- polarized light
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Abstract
A detection-used lighting source applying polarized light relates to a light source. The utility model provides a detection-used lighting source applying polarized light, which is provided with a camera, a first Polarizer, a lighting source, a second Polarizer and a printed circuit board. The first Polarizer is arranged between the lens of the camera and the lighting source, and is positioned in front of the lens of the camera or under the lens of the camera; the second Polarizer is arranged right under the lighting source, and is parallel to the board surface of the printed circuit board; the first Polarizer is parallel to the second Polarizer; the included angle between the polarization directions of the first Polarizer and the second Polarizer is 80 to 100 degrees; and the printed circuit board is arranged under the lens of the camera, the lighting source and the second Polarizer. Since a linear polarizer is arranged in front of the lens of the camera and the lighting source, harmful reflecting light can be effectively filtered, the surface of the parts can not form bright fleck when imaging. And in addition, through adjusting the polarization direction of the Polarizer, the amount of polarized light can be controlled and the reflect light on the surface of the object is reduced as required.
Description
Technical field
The utility model relates to a kind of light source, especially relates to a kind of detection lighting source that uses polarized light.
Background technology
Only a kind of electromagnetic wave, electromagnetic wave is a shear wave, promptly the electric vector of light wave and magnetic vector are all perpendicular to the direction of propagation of light wave.Electric vector has various vibrational states in the two-dimensional space vertical with the direction of propagation, and these states are called polarized state of light.
In plane perpendicular to the direction of propagation, comprise the lateral vibration of all possibility directions, and have identical amplitude on the either direction on average, the light that this lateral vibration is symmetrical in the direction of propagation is called natural light (nonpolarized light).All its vibrations lose this symmetric light general designation polarized light.
Common polarization state has 5 kinds, i.e. natural light, linearly polarized light, partial poolarized light, circularly polarized light and elliptically polarized light.
On the direction of propagation of light, only along a fixing direction vibration, this light is called linearly polarized light to light vector, because the track of light vector end points is a straight line, is called linearly polarized light again.The direction of light vector and the plane that the direction of propagation constituted of light are called vibration plane.The vibration plane of linearly polarized light maintains static, and can not rotate.
The thumping majority light source is emission line polarized light and launch natural light not, and the method that natural light obtains linearly polarized light has following 4 kinds: utilize reflection and refraction, utilize dichroism, utilize crystal birefringence, utilize scattering.In addition, linearly polarized light can produce circularly polarized light and elliptically polarized light through quarter wave plate 14.
Linear polarizer has the function of covering and seeing through to incident light, and it can only see through along the light vector of certain direction or light vector vibration component in the direction, and this printing opacity direction is called the polarization direction of polaroid or the direction of shaking thoroughly.
Polarized light is by some medium refraction or reflect the phenomenon that rear polarizer weakens, and is the depolarized phenomenon of polarized light.Linearly polarized light can be transformed into general natural light (nonpolarized light) by linearly polarized light by after depolarized fully.
Existing imaging system generally adopts to emit beam to be incident in from light source treats illuminated objects, and a part of light is attracted by object, and another part light is reflected by object, and that part of light major part that is reflected enters camera lens, images in the camera.
Summary of the invention
The purpose of this utility model is to provide a kind of detection lighting source that uses polarized light.
The utility model is provided with camera, the 1st polaroid, light source, the 2nd polaroid and prints version.
The 1st polaroid is located between camera lens and the light source and is positioned at the preceding or camera lens below of camera lens, the 2nd polaroid is located under the light source, the 2nd polaroid is parallel with the space of a whole page of printing version, the 1st polaroid and the 2nd polaroid are parallel to each other, the polarization direction angle of the 1st polaroid and the 2nd polaroid is 80 °～100 °, prints version and is located at camera lens, light source and the 2nd polaroid below.
Described light source is preferably annular light source.
The polarization direction angle of the 1st polaroid and the 2nd polaroid is preferably 90 °.
Decide according to light source form the shape and the installation site of the 2nd polaroid, all rises partially through the 2nd polaroid with the emergent ray that guarantees light source, realizes using the linearly polarized light illumination purposes.The shape of the 1st polaroid and installation site should be satisfied makes the linearly polarized light of injecting camera lens all by depolarized.
Compare with lighting source with existing detection, the utlity model has following outstanding advantage:
Because existing detection does not add polaroid with lighting source, so the device surface direct reflection is too strong, form speck during imaging; And the utility model is owing to add linear polarizer before camera lens and light source, therefore can filtering noxious effectively reflection ray, and device surface does not form speck during imaging.In addition, the utility model can be by adjusting the polarization direction of polaroid, and the quantity of control polarized light is with the reflective degree that needs that drops to of body surface.
Description of drawings
Fig. 1 is that structure of the present utility model is formed synoptic diagram.
Embodiment
Referring to Fig. 1, the utility model embodiment is provided with camera 1, camera lens the 2, the 1st polaroid 3, annular light source the 4, the 2nd polaroid 5 and prints version 6.
The 1st polaroid 3 is located between camera lens 2 and the annular light source 4 and is positioned at before the camera lens 2 or camera lens 2 belows, the 2nd polaroid 5 is located under the annular light source 4, the 2nd polaroid 5 is parallel with the space of a whole page of printing version 6, the 1st polaroid 3 and the 2nd polaroid 5 are parallel to each other, the polarization direction angle of the 1st polaroid and the 2nd polaroid is 80 °～100 °, prints version 6 and is located at camera lens 2, annular light source 4 and the 2nd polaroid 5 belows.
The polarization direction angle of the 1st polaroid 3 and the 2nd polaroid 5 is preferably 90 °.
Decide according to light source form the shape and the installation site of the 2nd polaroid, all rises partially through the 2nd polaroid with the emergent ray that guarantees light source, realizes using the linearly polarized light illumination purposes.The shape of the 1st polaroid and installation site should be satisfied makes the linearly polarized light of injecting camera lens all by depolarized.
Principle of work of the present utility model is as follows: the 2nd polaroid is fixed on the below of light source, and making emergent light is linearly polarized light, and this polarized light through target surface reflection back polarization state of light change has taken place, and wherein the reflective major part of influence detection still is a linearly polarized light.Add the 1st polaroid and adjust its polarization direction, make the polarization direction mutual vertical (80 °～100 ° of admissible use angle scopes) of the 1st polaroid and the 2nd polaroid, the reflective filtering that influence can be detected obtains desirable target image to the degree that needs.
Below provide the Application Example of the utility model in automated optical detects.
Embodiment 1: the colour circle resistance detection
The colour circle resistive surface is more smooth; the layer of transparent medium is arranged; adopt general light source irradiation; the resistance view picture that collects usually can solar flare occur because of its surperficial direct reflection; picture noise is many; not only the colour circle position judgment is inaccurate during processing, and colour circle center section color is reflective serious, brings very big difficulty to detection.
Adopt the utility model, on light source, add linear polarizer (referring to the 2nd polaroid), the illumination of use linearly polarized light, and before camera lens, add linear polarizer (referring to the 1st polaroid), make the polarization direction mutually vertical (80 °～100 ° of admissible use angle scopes) of two polaroids, then can weaken even eliminate the speck of colour circle resistive surface, image effect is good.
Colour circle resistance detection principle: light becomes linearly polarized light after through the 2nd polaroid, and at the dielectric surface of device surface, a part is by direct reflection, and another part is by transmission.By the part of direct reflection, still keep its linear polarization characteristic, when imaging, filtered by the 1st polaroid; The polarized light of transmission part, through by depolarized, polarizability weakens greatly by the transmission of dielectric layer once more after the diffuse reflection of transmission and device surface, through becoming linearly polarized light behind the 1st polaroid once more, and imaging in camera.
After the effect of the light that enters camera through two polaroids, light intensity diminishes from light source.So, use after the polaroid, suitably increase exposure.
Embodiment 2: red glue detects
Detect the red glue of printing on the version and whether have overflow, whether promptly red glue overflows to pad.
Do not go up the pad of tin on the red offset plate, adopt general light source irradiation, the image that collects usually can solar flare occur because of the reflection on its surface, influences AOI and judges whether red glue exists excessive glue.
Adopt the utility model, on light source, add the 2nd polaroid, the illumination of use linearly polarized light, and before camera lens, also add the 1st polaroid, preferably make the polarization direction mutually vertical (80 °～100 ° of admissible use angle scopes) of two polaroids, then can weaken even eliminate the solar flare of bond pad surface, improve the accuracy whether AOI exists the glue that overflows to judge to red glue.
Red glue detects principle: light becomes linearly polarized light after through the 2nd polaroid, in bond pad surface, most of light is reflected.Wherein still keep that part of reflected light of its linear polarization characteristic, when imaging, filtered by the 1st polaroid; And by depolarized that part of reflected light, polarizability weakens greatly, through becoming linearly polarized light and imaging in camera behind the 1st polaroid once more.
Claims (3)
1. a detection lighting source that uses polarized light is characterized in that being provided with camera, the 1st polaroid, light source, the 2nd polaroid and prints version; The 1st polaroid is located between camera lens and the light source and is positioned at the preceding or camera lens below of camera lens, the 2nd polaroid is located under the light source, the 2nd polaroid is parallel with the space of a whole page of printing version, the 1st polaroid and the 2nd polaroid are parallel to each other, the polarization direction angle of the 1st polaroid and the 2nd polaroid is 80 °～100 °, prints version and is located at camera lens, light source and the 2nd polaroid below.
2. a kind of detection lighting source that uses polarized light as claimed in claim 1 is characterized in that described light source is an annular light source.
3. a kind of detection lighting source that uses polarized light as claimed in claim 1, the polarization direction angle that it is characterized in that the 1st polaroid and the 2nd polaroid is 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200593663U CN201594069U (en) | 2010-01-15 | 2010-01-15 | Detection-used lighting source applying polarized light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200593663U CN201594069U (en) | 2010-01-15 | 2010-01-15 | Detection-used lighting source applying polarized light |
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| CN201594069U true CN201594069U (en) | 2010-09-29 |
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| CN2010200593663U Expired - Fee Related CN201594069U (en) | 2010-01-15 | 2010-01-15 | Detection-used lighting source applying polarized light |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278506A (en) * | 2013-05-10 | 2013-09-04 | 江苏赢洋实业股份有限公司 | Solar flare reduction method and device applied to smooth-surface fruit imaging detection |
| CN105334230A (en) * | 2015-11-26 | 2016-02-17 | 凌云光技术集团有限责任公司 | Light source devices for detecting hole defect of high-depth-ratio PCB (printed circuit board) |
| CN106353952A (en) * | 2016-10-28 | 2017-01-25 | 山东鲁能智能技术有限公司 | Polarizer-containing transformer substation indoor inspection robot image acquisition system and method |
| CN106603883A (en) * | 2016-12-20 | 2017-04-26 | 深圳市新良田科技股份有限公司 | High-speed photographic apparatus capable of preventing light reflection in light compensation |
| 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 |
| CN111351572A (en) * | 2019-11-21 | 2020-06-30 | 四川极智朗润科技有限公司 | Distributed reflection elimination device and method based on polarization characteristics |
| CN111693540A (en) * | 2020-06-16 | 2020-09-22 | 成都印钞有限公司 | Device and method for detecting printing image-text quality of colorful light variable ink |
| CN114089584A (en) * | 2021-10-27 | 2022-02-25 | 广东博智林机器人有限公司 | Anti-dazzle shooting device and construction robot |
| CN117041712A (en) * | 2023-10-08 | 2023-11-10 | 深圳市信润富联数字科技有限公司 | Light source integrated camera and detection method |
-
2010
- 2010-01-15 CN CN2010200593663U patent/CN201594069U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278506A (en) * | 2013-05-10 | 2013-09-04 | 江苏赢洋实业股份有限公司 | Solar flare reduction method and device applied to smooth-surface fruit imaging detection |
| CN105334230A (en) * | 2015-11-26 | 2016-02-17 | 凌云光技术集团有限责任公司 | Light source devices for detecting hole defect of high-depth-ratio PCB (printed circuit board) |
| CN106353952A (en) * | 2016-10-28 | 2017-01-25 | 山东鲁能智能技术有限公司 | Polarizer-containing transformer substation indoor inspection robot image acquisition system and method |
| CN106603883A (en) * | 2016-12-20 | 2017-04-26 | 深圳市新良田科技股份有限公司 | High-speed photographic apparatus capable of preventing light reflection in light compensation |
| 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 |
| CN111292537B (en) * | 2018-12-06 | 2023-05-16 | 中国科学院长春光学精密机械与物理研究所 | System and method for identifying license plate at night |
| CN111351572A (en) * | 2019-11-21 | 2020-06-30 | 四川极智朗润科技有限公司 | Distributed reflection elimination device and method based on polarization characteristics |
| CN111693540A (en) * | 2020-06-16 | 2020-09-22 | 成都印钞有限公司 | Device and method for detecting printing image-text quality of colorful light variable ink |
| CN114089584A (en) * | 2021-10-27 | 2022-02-25 | 广东博智林机器人有限公司 | Anti-dazzle shooting device and construction robot |
| CN117041712A (en) * | 2023-10-08 | 2023-11-10 | 深圳市信润富联数字科技有限公司 | Light source integrated camera and detection method |
| CN117041712B (en) * | 2023-10-08 | 2024-03-26 | 深圳市信润富联数字科技有限公司 | Light source integrated camera and detection method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100929 Termination date: 20160115 |
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| EXPY | Termination of patent right or utility model |