CN217112131U - Polarizing film defect optical detection system - Google Patents
Polarizing film defect optical detection system Download PDFInfo
- Publication number
- CN217112131U CN217112131U CN202220238158.2U CN202220238158U CN217112131U CN 217112131 U CN217112131 U CN 217112131U CN 202220238158 U CN202220238158 U CN 202220238158U CN 217112131 U CN217112131 U CN 217112131U
- Authority
- CN
- China
- Prior art keywords
- polarizing film
- light source
- panel light
- array camera
- stripe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a polarizing film defect optical detection system, polarizing film defect optical detection system includes: the device comprises a fixed rack, a panel light source and an area array camera, wherein the fixed rack is fixed at the coating process section, the panel light source and the area array camera are both positioned above the polarizing film and fixed at the fixed rack, the panel light source is positioned at the incident side of the polarizing film, the light emergent surface of the panel light source is covered with a grating stripe part, the area array camera is positioned at the emergent side of the polarizing film, and the area array camera is used for sampling the imaging of the panel light source on the polarizing film. The beneficial effects of the utility model reside in that: the local warping defect of the film surface can be easily and quickly found through an image sampled by the area-array camera.
Description
Technical Field
The utility model relates to a polarizing film defect detection, especially, polarizing film defect optical detection system.
Background
The polarizing film of the coating process section is liable to have a local warping defect (such as a grain portion or a concave-convex portion) of the film surface during processing. The currently used detection method is that a quality inspector directly observes the film surface of the polarizing film by naked eyes. The disadvantages are low efficiency and high false detection rate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the problem that prior art adopted direct observation method to detect the local warpage defect in face of the polarizing film of coating process section and arouse, provide a novel polarizing film defect optical detection system.
In order to realize the purpose, the technical scheme of the utility model is as follows: an optical detection system for detecting defects of a polarizing film, which is used for detecting whether the polarizing film in a coating process section has local warping defects of the film surface, and comprises: the device comprises a fixed rack, a panel light source and an area array camera, wherein the fixed rack is fixed at the coating process section, the panel light source and the area array camera are both positioned above the polarizing film and fixed at the fixed rack, the panel light source is positioned at the incident side of the polarizing film, the included angle formed by the normal direction of the panel light source and the normal direction of the polarizing film is 45 degrees, the light emergent surface of the panel light source is covered with a grating stripe part, the area array camera is positioned at the emergent side of the polarizing film, the included angle formed by the normal direction of the area array camera and the normal direction of the polarizing film is 45 degrees, and the area array camera is used for sampling the imaging of the panel light source on the polarizing film.
If the image sampled by the area-array camera presents uniform stripes, the polarizing film is free from the film surface local warping defect. If the image sampled by the area-array camera presents a twisted stripe, the polarizing film has the defect of local warping of the film surface.
As a preferable aspect of the optical inspection system for a defect of a polarizing film, the defect of local warping of the film surface includes: a textured portion or a textured or uneven portion.
As a preferable aspect of the optical detection system for a defect of a polarizing film, the grating stripe portions are oblique stripes arranged at equal intervals. Further, the stripe width of the grating stripe portion is set to 0.5mm, the stripe interval is set to 0.5mm, and the stripe slant angle is set to 45 °.
Compared with the prior art, the beneficial effects of the utility model reside in at least: if the image sampled by the area array camera shows a distorted fringe reflection, the polarizing film has a local film surface warping defect. Compared with direct observation, the image sampled by the area-array camera can easily and quickly find the local warping defect of the film surface.
In addition to the technical problems, technical features constituting technical aspects, and advantageous effects brought by the technical features of the technical aspects described above, other technical problems, technical features included in the technical aspects, and advantageous effects brought by the technical features solved by the present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a side view of the structure of the present invention.
Fig. 3 is a front view of the structure of the middle panel light source of the present invention.
Fig. 4 is a side view of the structure of the middle panel light source of the present invention.
Fig. 5 is a schematic structural view of the grating stripe portion of the present invention.
Fig. 6 is a schematic diagram 1 of an image sampled by the area-array camera of the present invention.
Fig. 7 is a schematic diagram 2 of an image sampled by the area-array camera of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 2, an optical inspection system for inspecting a polarizing film defect is shown, which is used to inspect whether a local warpage defect of a film surface exists in a polarizing film 100 of a coating process section. The local warping defect of the film surface comprises but is not limited to a corrugated part and a concave-convex part.
The polarizing film defect optical detection system includes: the device comprises a fixed frame 1, a panel light source 2 and an area-array camera 3.
The stationary frame 1 is fixed to the coating process section.
The panel light source 2 and the area-array camera 3 are both located above the polarizing film 100 and fixed to the stationary frame 1.
Referring to fig. 3 to 4, the panel light source 2 is shown. The panel light source 2 is located on the incident side of the polarizing film 100. An angle formed by the normal direction of the panel light source 2 and the normal direction of the polarizing film 100 is 45 °. The light-emitting surface of the panel light source 2 is covered with a grating stripe part 20. The grating stripe part 20 is printed on the light emitting surface of the panel light source 2, or a film forming structure is prepared and attached to the light emitting surface of the panel light source 2.
Referring to fig. 5, the stripe interval portion of the grating stripe portion 20 is a light-transmitting region, and the stripe portion of the grating stripe portion 20 is a non-light-transmitting region. The stripe intervals of the grating stripe portions 20 are customized according to the size of the defect to be detected. Generally, the stripe interval of the grating stripe portion 20 is not more than the minimum width required for detecting defects. Preferably, the grating stripe portions 20 are oblique stripes arranged at equal intervals. In this embodiment, the stripe width of the grating stripe portion 20 is set to 0.5mm, the stripe interval is set to 0.5mm, and the stripe slant angle is set to 45 °.
The area-array camera 3 is located on the exit side of the polarizing film 100. An angle formed by the normal direction of the area-array camera 3 and the normal direction of the polarizing film 100 is 45 °. The area-array camera 3 is used for sampling the image of the panel light source 2 on the polarizing film 100.
The working principle is as follows: under normal conditions, under the action of the light source 2, the polarizing film 100 has a sharp reversed fringe image with bright and dark intervals on its surface. If the image sampled by the area-array camera 3 shows a distorted striped inverted image, as shown in fig. 4 and 5, it indicates that the polarizing film has the defect of local warping of the film surface.
The above description is only intended to represent embodiments of the present invention, which are more specific and detailed, but not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. An optical detection system for detecting defects of a polarizing film is used for detecting whether the polarizing film in a coating process section has local warping defects of the film surface, and is characterized by comprising the following components: the device comprises a fixed rack, a panel light source and an area array camera, wherein the fixed rack is fixed at the coating process section, the panel light source and the area array camera are both positioned above the polarizing film and fixed at the fixed rack, the panel light source is positioned at the incident side of the polarizing film, the included angle formed by the normal direction of the panel light source and the normal direction of the polarizing film is 45 degrees, the light emergent surface of the panel light source is covered with a grating stripe part, the area array camera is positioned at the emergent side of the polarizing film, the included angle formed by the normal direction of the area array camera and the normal direction of the polarizing film is 45 degrees, and the area array camera is used for sampling the imaging of the panel light source on the polarizing film.
2. The optical detection system for a defect in a polarizing film according to claim 1, wherein the defect in local warping of the film surface comprises: a textured portion or a textured or uneven portion.
3. The optical detection system for defects of a polarizing film according to claim 1, wherein the grating stripe portions are oblique stripes arranged at equal intervals.
4. The optical inspection system for a defect of a polarizing film according to claim 3, wherein a stripe width of the stripe portion of the grating is set to 0.5mm, a stripe interval is set to 0.5mm, and a stripe slant angle is set to 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238158.2U CN217112131U (en) | 2022-01-28 | 2022-01-28 | Polarizing film defect optical detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238158.2U CN217112131U (en) | 2022-01-28 | 2022-01-28 | Polarizing film defect optical detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217112131U true CN217112131U (en) | 2022-08-02 |
Family
ID=82599095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220238158.2U Active CN217112131U (en) | 2022-01-28 | 2022-01-28 | Polarizing film defect optical detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217112131U (en) |
-
2022
- 2022-01-28 CN CN202220238158.2U patent/CN217112131U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4511978B2 (en) | Surface flaw inspection device | |
| US6930772B2 (en) | Method and device for inspecting defect of sheet-shaped transparent body | |
| US7769223B2 (en) | Surface defect inspector and method of inspecting surface defect | |
| JPH0674907A (en) | Detection method for defect of tranparent plate-like body | |
| WO2008079208A1 (en) | Method of automated quantitative analysis of distortion shaped vehicle glass by reflected optical imaging | |
| KR20090113885A (en) | Method and apparatus for illuminating material for automated inspection | |
| JP2015040835A (en) | Defect inspection device and defect inspection method for transparent tabular body | |
| US6757058B1 (en) | Fiber-optic light line for use in an inspection system | |
| CN105486700A (en) | System for detecting defects of transparent object and use method thereof | |
| JP5842373B2 (en) | Surface defect detection method and surface defect detection apparatus | |
| KR101151274B1 (en) | Apparatus for inspecting defects | |
| JP4158227B2 (en) | Inspection method and inspection apparatus for minute unevenness | |
| KR20000017647A (en) | Method of and apparatus for inspecting surface irregularities of transparent plate | |
| CN217112131U (en) | Polarizing film defect optical detection system | |
| CN102589474A (en) | Evaluating method and evaluating device for surface shape | |
| EP3413037B1 (en) | Inspection device for sheet-like objects, and inspection method for sheet-like objects | |
| JP2013246059A (en) | Defect inspection apparatus and defect inspection method | |
| JPH07234187A (en) | Method and device for detecting surface detect of glass substrate | |
| JP4720287B2 (en) | Coating unevenness inspection method and program thereof | |
| CN113189002B (en) | Online detection method and device for stripe defects of ultrathin electronic glass substrate | |
| JP6679942B2 (en) | Sheet defect inspection device | |
| JP4892943B2 (en) | Density unevenness inspection device | |
| CN111751386B (en) | Machine vision optical detection system and method | |
| JP2000161937A (en) | Surface inspection device for cylindrical object | |
| JPH08178855A (en) | Method for inspecting light-transmissive object or specular object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |