TWM568454U - Optical inspection apparatus - Google Patents

Abstract

An optical inspection apparatus is adapted to inspect a test object. The optical inspection apparatus includes a platform, an image capturing element, at least two side light sources, at least two reflective elements and an inspection unit. The platform has an assembly opening, wherein the platform is configured for carrying the test object and test object is disposed corresponding to the assembly opening. The image capturing element and the two side light sources are respectively disposed above and under the platform, wherein the image capturing element is aligned with the assembly opening and the image capturing element captures the test object. The two reflective elements are disposed at the assembly opening. The two side light sources are respectively disposed corresponding to the two reflective elements, and each reflective element is located between the image capturing element and the corresponding side light source. Each side light source and the corresponding reflective element are able to supply a side light to the test object, such that an image of the test object is captured by the image capturing element. The inspection unit receives the image of the test object so as to inspect the test object.

Description

Optical inspection equipment

The novel creation is related to a detection device, and in particular to an optical detection device.

During the manufacturing process of the panel, defects or mistakes in the process may cause bright spots or broken spots when the panel is lit. Therefore, after the panel is completed, the panel is inspected by optical inspection equipment to determine whether there is a bright spot or a broken spot on the panel, and if so, the position of the bright spot or the broken spot is further obtained for repairing. However, in the optical detection process, the acquired image may include bright spots in the panel, broken bright spots in the panel, and foreign matter attached to the panel. If accidentally, the foreign matter attached to the panel may be misidentified as Highlights or broken highlights, resulting in overkill during the inspection process.

Generally, the optical detecting device is provided with a side light source for projecting lateral light to the panel to obtain an image of foreign matter attached to the panel. However, limited by the angle limitation of the lateral ray casting onto the panel, it is difficult to reduce the distance between the side light source and the panel, so that the brightness of the light projected to the panel is insufficient, thereby affecting the detection accuracy.

The novel creation provides an optical detection device that helps to improve detection accuracy.

The optical detection device created by the novel is suitable for detecting an object to be tested. The optical detecting device comprises a platform, an image capturing element, at least two side light sources, at least two reflective elements, and a detecting unit. The platform has a mounting opening, wherein the platform is used to carry the object to be tested, and the object to be tested is disposed corresponding to the mounting opening. The image capturing component and the two side light sources are respectively disposed above and below the platform, wherein the image capturing component pair is located at the mounting opening, and the image captures the side object. The aforementioned two reflective elements are disposed on the mounting opening. The two reflective elements respectively correspond to the two side light sources, and each of the reflective elements is located between the image capturing element and the corresponding side light source. Each of the side light sources and the corresponding reflective element can provide side light to the side of the object, whereby the image capturing element captures an image of the object to be side. The detecting unit receives the image of the object to be side, thereby detecting the object to be side.

Based on the above, the optical detecting device of the present invention can reduce the distance between the side light source and the object to be tested by the arrangement of the reflective element, so that the brightness of the lateral light projected to the object to be tested is improved and uniform, thereby contributing to Improve detection accuracy.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partial cross-sectional view showing an optical detecting apparatus of an embodiment of the present invention. 2 is a partial top plan view of an optical detecting apparatus according to an embodiment of the present invention. 3 is a circuit diagram of an optical detecting apparatus of an embodiment of the present invention. For the sake of clarity, FIG. 2 omits the imaging element 120 disposed above the platform 110. Referring to FIG. 1 to FIG. 3, in the embodiment, the optical detecting device 100 can be used to detect defects existing in the object to be tested, wherein the object to be tested can be the panel 10, but is not limited thereto. In other embodiments, the object to be tested may also be a light guide plate, a polarizer or other optical component.

The optical detecting device 100 includes a platform 110, an image capturing component 120, a backlight 130, at least two reflective components 140, at least two side light sources 150, and a detecting unit 160. Assuming that the backlight 130 is located at the bottom side of the overall device, the backlight 130, the foregoing two The side light source 150, the stage 110, and the image capturing element 120 are sequentially arranged, for example, from bottom to top. Along the arrangement direction, the two side light sources 150 are disposed above the backlight 130 and located below the platform 110. The platform 110 is disposed above the two side light sources 150, and the image capturing component 120 is disposed above the platform 110. Further, the two side light sources 150 are juxtaposed between the platform 110 and the backlight 130, and the platform 110 is located between the two side light sources 150 and the image capturing element 120. That is, the backlight 130 and the image capturing component 120 are respectively located on opposite sides of the platform 110, and the distance between the backlight 130 and the platform 110 is greater than the distance between any of the side light sources 150 and the platform 110.

The platform 110 has a mounting opening 111 in which the platform 110 is used to carry the panel 10 and the panel 10 is disposed corresponding to the mounting opening 111, for example, at least a portion of the panel 10 overlapping the mounting opening 111. The image capturing element 120 is located at the mounting opening 111, and the image capturing element 120 may be a line scan camera or a face scan camera, but is not limited thereto. The pair of backlights 130 are located at the mounting opening 111 and are configured to project the backlight line 131 toward the mounting opening 111 to illuminate the panel 10 disposed corresponding to the mounting opening 111. Further, the backlight line 131 can be incident on the image capturing component 120 after penetrating the panel 10 , wherein the image capturing component 120 obtains a mixed pupil surface image according to the backlight line 131 penetrating the panel 10 . The mixed 瑕疵 surface image may include bright spots in the panel 10, broken bright spots in the panel 10, and foreign matter attached to the panel 10, and are hereinafter referred to as a bright spot image, a broken bright spot image, and a foreign matter image.

In this embodiment, the position of each side light source 150 is based on a path that does not hinder the backlight line 131 from being directed toward the panel 10, wherein each side light source 150 faces a reflective element 140, and each reflective element 140 is located in the image capturing element. Between 120 and the corresponding side light source 150, and the position of each reflective element 140 is based on a path that does not hinder the backlight line 131 from being directed toward the panel 10. Further, the lateral light rays 151 projected by the side light sources 150 are not directly incident on the panel 10 but are first directed to the corresponding reflective elements 140 and then reflected to the panel 10 via the corresponding reflective elements 140. As such, it helps to increase the uniformity and brightness of the lateral ray 151 projected onto the panel 10. The lateral ray 151 can be directed toward the imaging element 120 after penetrating the panel 10, wherein the imaging element 120 obtains a foreign object surface image according to the lateral ray 151 penetrating the panel 10. Among them, the foreign object surface image contains a foreign matter image. That is to say, the composition of the surface image of the mixed raft is different from the composition of the surface image of the foreign matter. Specifically, each of the side light sources 150 is configured to project the lateral light ray 151 to the corresponding reflective element 140 along the corresponding transmission path, and the two transfer paths do not overlap each other, that is, the two side light sources 150 and the foregoing two reflections. The arrangement of the elements 140 is based on the principle of not interfering with the transmission path of any of the lateral rays 151.

As shown in FIG. 1 , the two reflective elements 140 are disposed on the platform 110 , and in the alignment mounting openings 111 , for example, the two reflective elements 140 can be respectively fixed to the opposite inner wall surfaces of the mounting openings 111 . The backlight 130, the two side light sources 150, and the two reflective elements 140 are sequentially arranged from bottom to top, and the side light sources 150 are located between the backlight 130 and the corresponding reflective elements 140 along the arrangement direction. Based on the arrangement of the reflective element 140, the angle of the lateral light 151 projected by the side light source 150 toward the panel 10 is adjusted, whereby most of the lateral light 151 fails to penetrate the panel 10 due to the total reflection effect, thereby avoiding The foreign object surface image obtained by the image capturing component 120 includes a bright spot image and a broken bright spot image. Moreover, since the reflective element 140 can adjust the projection path of the lateral light 151, the distance between the side light source 150 and the panel 10 can be reduced, for example, to 25 mm, thereby contributing to the improvement of the lateral light 151 projection to the panel. 10 uniformity and brightness.

In one embodiment, each of the lateral rays 151 is parallel light, the surface 11 of the parallel panel 10 facing the backlight 130. Further, the parallel light means that the lateral rays 151 are reflected from the corresponding reflective elements 140. Reflected light. In another embodiment, the corner between the reflected light reflected from the corresponding reflective element 140 and the surface 11 of the panel 10 is between 130 degrees and 180 degrees. FIG. 1 illustrates the angle of 180 degrees of appearance.

Referring to FIG. 1 and FIG. 3, the detecting unit 160 is electrically coupled to the image capturing component 120, the backlight 130, and the side light sources 140. The detecting unit 160 can be a central processing unit, other programmable general purpose or special purpose. a microprocessor, a digital signal processor, a programmable controller, a special application integrated circuit, a programmable logic device or the like, or a combination of these devices, and used to control the backlight 130 to project the backlight 131, each The side light source 150 projects the side light ray 151 and the mixed 瑕疵 surface image and the foreign object surface image obtained by the image capturing element 120. In the process of aligning the surface image and the foreign object surface image, the detecting unit 160 may filter unnecessary images in the mixed surface image based on the foreign object surface image. Further, the detecting unit 160 may be based on the foreign matter in the foreign object surface image. The image filters the foreign matter image in the mixed surface image to obtain the distribution of the bright spot image and the broken spot image. Since the surface image of the foreign object does not substantially contain the bright spot image and the broken bright spot image, it can prevent the bright spot image and the broken bright spot image in the mixed surface image from being filtered out during the process of comparing the mixed surface image and the foreign object surface image, thereby Helps improve detection accuracy.

Referring to FIG. 1 and FIG. 2 , in the embodiment, the optical detecting device 100 further includes at least two carriers 170 , wherein the parallel two carriers 170 connect the platform 110 toward the side of the backlight 130 (or the platform 110 back). The position of each of the carriers 170 is based on a path that does not hinder the backlight 131 from being incident on the panel 10. Further, the two carriers 170 are respectively disposed corresponding to the foregoing two reflective elements 140, and are respectively disposed adjacent to the mounting openings 111. Each of the carriers 170 is configured to carry a side light source 150, wherein each of the carriers 170 has a light-emitting opening 171 facing the corresponding reflective element 140, and the lateral light 151 projected by each side light source 150 is directed toward the corresponding light-emitting opening 171. Corresponding reflective element 140.

In particular, the novel creation does not limit the number of side light sources, the number of reflective elements, and the number of carriers.

On the other hand, the optical detecting device 100 further includes at least two limiting members 180 disposed around the mounting opening 111 and facing each other. The two second limiting members 180 are configured to clamp the panel 10 such that at least a portion of the panel 10 overlaps the mounting opening 111 and prevents the panel 10 from slipping relative to the platform 110. In this embodiment, the number of the limiting members 180 may be greater than two, and the material of the limiting member 180 may be rubber, silicone or other non-slip and moderately deformable material to avoid damage to the panel 10 or the panel 10 for detection. Slip during the process. For example, each of the limiting members 180 can include a carrying portion 181 extending toward the mounting opening 111 , wherein at least a portion of each of the carrying portions 181 is overlapped with the mounting opening 111 and configured to carry the panel 10 . As shown in FIG. 1, the carrying portion 181 may have an L-shaped card slot for the side edges of the panel 10 to be engaged therein, thereby restricting the degree of freedom of movement of the panel 10 in two directions perpendicular to each other.

As shown in FIG. 1 , the two limiting members 180 are respectively disposed on the two side light sources 150 , and the two limiting members 180 are respectively disposed on a side of the two reflective elements 140 facing away from the two side light sources 150 . That is to say, each of the reflective elements 140 is first mounted on the corresponding limiting member 180, and then mounted to the platform 110 with the corresponding limiting member 180, and each reflective element 140 falls in the mounting opening 111. As shown in FIG. 2, the optical detecting device further includes at least one positioning member 190 (two are schematically shown), wherein the opposite side of each positioning member 190 is provided with a limiting member 180, and the pushing block of each positioning member 190 The 191 extends toward the mounting opening 111. The user can adjust the position of the push block 191 through the control portion 192 of each positioning member 190 to make the push block 191 approach the panel 10 and push the panel 10 against the limit member 180 on the opposite side of the positioning member 190, thereby being more stable. The panel 10 is snapped onto the platform 110. The material of the push block 191 can be rubber, silicone or other non-slip and moderately deformable material to avoid damaging the panel 10 or the panel 10 from slipping during the detection process.

In summary, the optical detecting device created by the present invention can reduce the distance between the side light source and the object to be tested by the arrangement of the reflective element, so that the brightness of the lateral light projected to the object to be tested is improved and uniform, thereby Help to improve the detection accuracy, especially to reduce the over-detection rate. The so-called over-test refers to the erroneous determination of the qualified product as a non-conforming product, which will cause the qualified product to be disposed of and discarded, and the qualified product is erroneously determined as The ratio of non-conforming products is called the over-test rate. Further, by projecting the backlight line to the object to be tested by the backlight, the image capturing component can obtain the mixed 瑕疵 surface image according to the backlight line penetrating the object to be tested. On the other hand, the lateral light source is projected by the side light source, and the lateral light is deflected by the reflective element to be directed toward the object to be tested. The image capturing element can obtain the surface image of the foreign object according to the lateral light that penetrates the object to be tested. Finally, the mixed 瑕疵 surface image is compared with the foreign object 瑕疵 surface image to determine the location of the dust and foreign matter in the object to be tested, and the subsequent repair process is performed.

Based on the arrangement of the reflective elements, the angle of the lateral light projected by the side light source to the object to be tested is adjusted, whereby most of the lateral light fails to penetrate the object to be tested due to the total reflection effect, thereby avoiding the image capturing element. The obtained foreign object surface image contains images such as bright spots and broken bright spots in the object to be tested. Since the second image substantially does not include the bright spot image and the broken bright spot image, the bright spot image and the broken bright spot image in the mixed surface image are prevented from being filtered out during the process of comparing the mixed surface image and the foreign object surface image, thereby Helps improve detection accuracy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

10‧‧‧ panel

11‧‧‧ surface

100‧‧‧Optical testing equipment

110‧‧‧ platform

111‧‧‧Installation opening

120‧‧‧Image taking components

130‧‧‧Backlight

131‧‧‧Backlight

140‧‧‧reflecting elements

150‧‧‧ side light source

151‧‧‧lateral light

160‧‧‧Detection unit

170‧‧‧ Carrier

171‧‧‧Lighting opening

180‧‧‧Limited parts

181‧‧‧Loading Department

190‧‧‧ Positioning parts

191‧‧‧ push block

192‧‧‧Control Department

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partial cross-sectional view showing an optical detecting apparatus of an embodiment of the present invention. 2 is a partial top plan view of an optical detecting apparatus according to an embodiment of the present invention. 3 is a circuit diagram of an optical detecting apparatus of an embodiment of the present invention.

Claims (9)

An optical detecting device is adapted to detect a test object, the optical detecting device comprising: a platform having a mounting opening, wherein the platform is configured to carry the object to be tested, and the object to be tested is disposed corresponding to the mounting opening; An image taking component is disposed above the platform, and the image captures the object to be side; at least two side light sources are disposed under the platform and are located at the mounting opening; at least two reflective elements are disposed at the mounting opening, The at least two reflective elements respectively correspond to the two side light sources, and each of the reflective elements is located between the image capturing element and the corresponding side light source, wherein each of the side light sources and the corresponding one of the side light sources can provide the The side object is directed to the light, whereby the image capturing component captures an image of the object to be side; and a detecting unit receives the image of the object to be side, thereby detecting the object to be side. The optical detecting device of claim 1, further comprising: at least two carriers connected to a side of the platform facing away from the image capturing component, and respectively configured to carry the two side light sources, wherein the two The racks are respectively disposed corresponding to the two reflective elements, and each of the racks has a light-emitting opening toward the corresponding reflective element, and the lateral light rays projected by the side light sources are directed to the corresponding reflections through the corresponding light-emitting openings. element. The optical detecting device of claim 1, further comprising: at least two limiting members disposed around the mounting opening and facing each other, the two limiting members being configured to clamp the object to be tested. The optical detecting device of claim 3, wherein each of the limiting members comprises a carrying portion extending toward the mounting opening and configured to carry the object to be tested. The optical detecting device of claim 3, wherein the two limiting members are respectively located on the two side light sources, and the two limiting members are respectively disposed on a side of the two reflective elements facing away from the two side light sources. . The optical detecting device of claim 3, further comprising: at least one positioning member disposed on an opposite side of one of the limiting members, and configured to push the object to be tested against one of the limits Bit pieces. The optical detecting device of claim 3, further comprising: a backlight, and the image capturing component are respectively disposed on opposite sides of the platform, wherein the backlight pair is located at the mounting opening, and the backlight is configured The image is electrically coupled to the image capturing component, the backlight, and each of the side light sources. The image is electrically coupled to the image capturing component, the backlight, and the side light source. The optical detecting device of claim 1, wherein each of the lateral rays is parallel light parallel to a surface of the object to be side. The optical detecting device of claim 1, wherein a corner between each of the lateral light and a surface of the object to be side is between 130 degrees and 180 degrees.