CN212845096U

CN212845096U - Dirt defect imaging mechanism in polarizer

Info

Publication number: CN212845096U
Application number: CN202022112867.XU
Authority: CN
Inventors: 王郑; 王岩松; 和江镇; 王崇; 付方龙; 李振豪
Original assignee: Focusight Technology Co Ltd
Current assignee: Focusight Technology Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-03-30
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a polarizer inner dirt defect imaging mechanism, which comprises a camera and a light source which are arranged below an upper air suction transmission platform; the camera and the light source are fixed through the bracket, light emitted by the light source irradiates the surface of the polaroid and is reflected, the camera images the polaroid, and an imaging point is positioned in a dark field area of the light source; an included angle alpha is formed between the central axis of the lens of the camera and the direction perpendicular to the polaroid, and an included angle beta is formed between the light rays emitted by the light source and the direction perpendicular to the polaroid. The utility model can clearly image the inner dirt defect of the brightening piece under a certain angle by the camera through the reflection of the highlight line light, is convenient for detection and identification, can effectively detect the inner dirt defect of the brightening piece, improves the product detection effect, and avoids the defective goods from flowing into the market; the device is suitable for brightening polarizer detection, can solve the problem that the machine online detection cannot effectively identify the internal stain defect, enhances the detection efficiency and increases the product outflow yield.

Description

Dirt defect imaging mechanism in polarizer

Technical Field

The utility model relates to an imaging mechanism, especially a dirty defect imaging mechanism in polaroid.

Background

The rapid development of the mobile phone industry avoids the defect that any tiny defect can not cause the product to be bad. Therefore, a large number of manual detection products of operators appear, and with the increase of labor cost and the development of new technologies, the trend is to use machine detection instead of manual work. However, the brightness enhanced polarizer has a small defect of dirt inside, and is easy to miss detection in manual detection, and defective products flow out, resulting in quality reduction.

And the stations capable of imaging the internal stain defects in the prior art have a great deal of interference and can not effectively detect the defects. The reason is that the inner contamination defect caused by the process problem is generally positioned between the protective film of the brightness enhancement sheet and the TAC film, and is very small, so that the imaging effect without interference is difficult to form.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a dirty defect imaging mechanism in polaroid, solves the problem that brightened type polaroid is in bright face appearance defect detection the foreign matter detection between protective film and TAC film.

The utility model provides a technical scheme that its technical problem adopted is: a mechanism for imaging the internal stain defect of a polarizer comprises a camera and a light source which are arranged below an upper air suction transmission platform; the camera and the light source are fixed through the bracket, light emitted by the light source irradiates the surface of the polaroid and is reflected, the camera images the polaroid, and an imaging point is positioned in a dark field area of the light source; an included angle alpha is formed between the central axis of the lens of the camera and the direction perpendicular to the polaroid, and an included angle beta is formed between the light rays emitted by the light source and the direction perpendicular to the polaroid.

Furthermore, the included angle alpha of the utility model is in the range of 10-30 degrees; the included angle beta is within the range of 0-5 degrees.

Furthermore, the light source of the present invention is a high bright linear bar light source.

Still further say, the perpendicular distance h1 of light source and polaroid be 200 ~ 300mm, the perpendicular distance h2 of camera and polaroid is 350 ~ 420 mm.

Further say, last transmission platform that induced drafts have the belt that induced drafts, the polaroid adsorb and carry out transmission on the belt that induced drafts.

The utility model has the advantages that the defects in the background art are solved,

1. through reflection of high-brightness line light, the camera clearly images the stain defects in the brightening film at a certain angle, so that detection and identification are facilitated;

2. the polaroid is detected from the bright surface, and the internal contamination defect can be clearly imaged without other interference and is convenient to detect by adjusting the angle of the camera and the light source and utilizing the light source to reflect dark field imaging;

3. when the online appearance detection is carried out in real time, the defect of dirt in the brightening chip can be effectively detected, the product detection effect is improved, and defective goods are prevented from flowing into the market;

4. the device is suitable for brightening polarizer detection, can solve the problem that the machine online detection cannot effectively identify the internal stain defect, enhances the detection efficiency and increases the product outflow yield.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the imaging light path of the present invention;

in the figure: 1. an upper air suction transmission platform; 2. a camera; 3. a light source; 4. a support; 5. a polarizer; 6. air suction belt.

Detailed Description

The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The mechanism for imaging the inner stain defect of the polarizer shown in fig. 1-2 comprises a camera 2 and a light source 3 which are arranged below an upper air suction transmission platform 1; the upper air suction transmission platform 1 is provided with an air suction belt 6, and the polaroid 5 is adsorbed on the air suction belt 6 for transmission. The camera 2 and the light source 3 are fixed through the support 4, light emitted by the light source irradiates the surface of the polaroid 5 and is reflected, the camera 2 images the polaroid 5, and an imaging point is positioned in a dark field area of the light source; an included angle alpha is formed between the central axis of the lens of the camera 2 and the direction perpendicular to the polaroid, and the included angle alpha is within the angle range of 10-30 degrees; the light that sends of light source 3 and the direction of perpendicular to polaroid between have contained angle beta, the angular range of contained angle beta is 0 ~ 5, in fig. 2, this embodiment contained angle beta is 0, promptly, the light source is perpendicular with the polaroid. The light source is a high-brightness linear strip light source. The vertical distance h1 between the light source and the polarizer is 200-300 mm, and the vertical distance h2 between the camera and the polarizer is 350-420 mm.

According to the scheme, a camera and a light source are used, an upper air suction platform at one section is used for realizing the imaging of the stain defects in the brightness-enhanced polarizer, and the camera and the light source are positioned below the air suction platform, so that the bright surface of the polarizer can be conveniently detected; the internal stain defect is imaged by adjusting the angle of the camera and the angle of the light source, an imaging point is positioned in a dark field area of the light source, the integral imaging is uniform, the defect imaging is clear, and the interference of glue stain scratching and the like is avoided; the scheme adopts the upper air suction platform to transport the polaroid, so that stable and effective adsorption can be realized, and stable and smooth conditions are created for imaging; dirty defect in can effective formation of image when online real-time appearance detects promotes product defect relevance ratio, avoids the wastrel to flow into market. Compare with current optical lighting, the dirty defect formation of image of needle that this station can be better makes to detect more accurately.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. The utility model provides a dirty defect imaging mechanism in polaroid which characterized in that: the device comprises a camera and a light source which are arranged below an upper air suction transmission platform; the camera and the light source are fixed through the bracket, light emitted by the light source irradiates the surface of the polaroid and is reflected, the camera images the polaroid, and an imaging point is positioned in a dark field area of the light source; an included angle alpha is formed between the central axis of the lens of the camera and the direction perpendicular to the polaroid, and an included angle beta is formed between the light rays emitted by the light source and the direction perpendicular to the polaroid.

2. The polarizer internal smear defect imaging apparatus of claim 1, wherein: the included angle alpha is 10-30 degrees.

3. The polarizer internal smear defect imaging apparatus of claim 1, wherein: the included angle beta is within the range of 0-5 degrees.

4. The polarizer internal smear defect imaging apparatus of claim 1, wherein: the light source is a high-brightness linear strip light source.

5. The polarizer internal smear defect imaging apparatus of claim 1, wherein: the vertical distance h1 between the light source and the polarizer is 200-300 mm, and the vertical distance h2 between the camera and the polarizer is 350-420 mm.

6. The polarizer internal smear defect imaging apparatus of claim 1, wherein: the upper air suction transmission platform is provided with an air suction belt, and the polaroid is adsorbed on the air suction belt for transmission.