TWI599759B - An optical inspection device - Google Patents

Description

Optical detecting device

The present invention relates to an optical detecting device, and more particularly to an optical detecting device having both high degree of freedom and elasticity.

Automated Optical Inspection (AOI) is commonly used in manufacturing. It uses optical lighting combined with image processing and identification systems to determine whether a product is flawed. It can be used to further determine the type or cause of cockroaches. Important link.

The conventional automatic optical detection technology, such as the Republic of China Invention Patent Publication No. 200801473, proposes an automatic optical detection system for COF/TCP, which is used for detecting COF/TCP arranged equidistantly on a tape, including a tape winding device and an image. a loading device, a data storage/comparison device, a backlight projection device and a warning device, the tape winding device comprising a release wheel for releasing a tape and a recycling device disposed opposite to the release wheel for recycling the tape a wheel, a detection zone for the tape to be moved at a constant speed; the image capturing device is disposed at one end of the tape for capturing at least one COF/TCP image on the detection zone; the data storage/alignment The device is connected to the image capturing device for storing standard image data pre-captured by the image capturing device for comparison with the image of the COF/TCP; the warning device is connected to the data storage/comparison device. On-site alerts are provided when the data storage/comparison device is compared and a non-conforming COF/TCP is detected. Or, as disclosed in the Republic of China Invention Patent Publication No. I230255, an automatic optical inspection machine for inspecting a workpiece comprising an upright platform and one less charge coupled element, the upright platform being substantially perpendicular to the ground for upright support The workpiece; the charge coupled component is used to optically inspect the workpiece.

The backlight projection device and the image capturing device in the Republic of China Invention Patent Publication No. 200801473 are erected in a fixed manner and cannot be moved, so that the scope, manner or type of the object to be tested are limited, and it is not advantageous. In the application, and the Republic of China Invention Patent Publication No. I230255, the charge-coupled element is movable, but is limited to single-direction movement, and therefore, the scope of application thereof is also limited. In the above prior art, for the user, when the object to be tested is to be replaced, or the detection angle or method is adjusted, different types of automatic optical detecting equipment are required to be obtained; and for the supplier, the face is different. The customer needs also need to be re-adjusted and designed for their organization to meet customer needs. Therefore, the existing automatic optical inspection equipment lacks the flexibility function, which is not conducive to the development of the industry.

The main object of the present invention is to solve the problem that the optical or image capturing component of the conventional optical detecting device adopts a fixed or one-way moving design, resulting in a low degree of freedom of the optical detecting device and no elastic adjustment. .

In order to achieve the above object, the present invention provides an optical detecting device comprising a platform and a detecting unit, the platform having a detecting position for placing a to-be-detected object, the detecting unit comprising a light source component, an image capturing component and a a moving mechanism, the light source component is disposed relative to the detecting position, the image capturing component is moved relative to the detecting position, the moving mechanism is coupled to the image capturing component and controls the image capturing component to move along a first trajectory relative to the detecting position The first moving plane formed by the first track conforms to at least a portion of a spherical surface such that the image capturing element passes through each point of the first track and the distance between the detecting positions is equal.

It can be seen from the above that the illuminating effect of the present invention compared to the prior art is that the optical detecting device of the present invention uses the image capturing element to perform multi-point movement on the first moving plane conforming to the spherical surface, which is not The conventional system is erected in a fixed manner or only moved in a horizontal manner. Therefore, when detecting a different detection condition of the object to be detected, the detection condition can be accurately and quickly adjusted to the corresponding detection condition. The optical detecting device has a high degree of freedom detection method. On the other hand, since the image capturing component moves in the first moving plane that conforms to the spherical surface, when the image capturing component captures an image to be analyzed at different angles, it does not affect the working position. The image capture component is separated from the detection position by a working distance and the accuracy of the detection, thereby increasing the yield of the produced product and greatly reducing the production cost.

The detailed description and technical content of the present invention will now be described as follows:

Please refer to FIG. 1 for a side view of an optical detecting device according to an embodiment of the present invention. The present invention is an optical detecting device including a platform 10 and a detecting unit 20, the platform 10 having one for one The detecting unit 20 includes a light source component 201, an image capturing component 202, and a moving mechanism.

In one embodiment, the light source component 201 is fixed relative to the detection position, the image capture component 202 is moved relative to the detection position, and the movement mechanism is coupled to the image capture component 202 and controls the image capture component 202 relative to the detection. Positioning along a first trajectory, wherein the first trajectory constitutes a first moving plane 30 that conforms to at least a portion of a spherical surface such that the image capturing element 202 passes through points of the first trajectory and the detected position The distance between them is equal.

In another embodiment, the light source component 201 and the image capturing component 202 are respectively moved relative to the detecting position, and the moving mechanism controls the light source component 201 and the image capturing component 202 to respectively follow a second track relative to the detecting position. And a first trajectory movement, wherein the first trajectory and the second trajectory comprise a first moving plane 30 and a second moving plane 31 respectively conforming to at least a part of a spherical surface, so that the light source component 201 passes the first The distance between each point of the two tracks and the detected position are equal, and the distance between the image capturing element 202 passing through the points of the first track and the detecting position is equal.

In the present invention, the image capturing component 202 and the light source component 201 are respectively separated from the detecting position by a first working distance and a second working distance, and the second working distance and the first working distance are respectively dependent on the light source. The intensity of a detection light source provided by the component 201 and the image capturing component 202 are adjusted for a detection condition of the object to be detected 11, and the detection condition may be an image to be analyzed captured by the image capturing component 202. The resolution, the depth of field range of the object 11 to be detected, the field of view of the object 11 to be detected, or the combination thereof. In addition, the type of the image capturing component 202 is a photosensitive coupled device (CCD) camera or a complementary metal oxide semiconductor (CMOS) camera.

As shown in FIG. 2, it is a schematic diagram of a four-link ball type moving mechanism according to a first embodiment of the present invention. The moving mechanism includes a first crankshaft link 40, a second crankshaft link 41, and a first track. The first crankshaft link 40 has a first pivot 401 fixed to the platform 10 and a second pivot 402 coupled to the first curved panel 42. The second crankshaft 41 has a fixed a third pivot 411 of the platform 10 and a fourth pivot 412 connected to the first curved panel 42 . The first curved panel 42 clamps the light source component 201 or the image capturing component 202 and the same The moving plane 31 or the first moving plane 30 is aligned and moved. In this embodiment, the image capturing component 202 is clamped as an example. If the light source component 201 or the image capturing component is moved at different trajectories at the same time, At 202 o'clock, the light source element 201 and the image capturing element 202 can be respectively clamped to different moving mechanisms. The length between the first pivot 401 and the second pivot 402 and the length between the third pivot 411 and the fourth pivot 412 are fixed to each other to make the first curved panel 42 The moving plane 30 or any point on the second moving plane 31 performs multi-point movement centering on the detected position.

In the present invention, in order to increase the range of movement of the light source element 201 and the image capturing element 202, a high degree of freedom moving mechanism can be used, as shown in FIG. 3, which is a fourth embodiment of the present invention. A schematic diagram of a connecting rod ball type moving mechanism, the moving mechanism includes a third crank connecting rod 43, a fourth crank connecting rod 44 and a second curved panel 45, the third crank connecting rod 43 having a fixed fifth pivot a shaft 431 and a sixth pivot 432 connected to the second curved panel 45. The fourth crankshaft link 44 has a fixed seventh pivot 441 and an eighth pivot connected to the second curved panel 45. 442, the second curved panel 45 holds the light source component 201 or the image capturing component 202 and moves in alignment with the second moving plane 31 or the first moving plane 30, wherein the embodiment clamps the The image capturing component 202 is exemplified. For example, the pivots have two rotating structures, so that the objects respectively disposed on the rotating structure can be rotated with each other. For example, the four-bar ball type moving mechanism is taken as an example. As long as the light source element 201 or the image capturing element 2 is made 02 The mechanism that can move on the spherical track can not be limited to the example of this case.

In the actual application, when the object to be detected 11 is placed on the detecting position of the platform 10, the detecting light source of the light source element 201 is first irradiated onto the object to be detected 11, so that the detecting light source is to be detected. One of the objects 11 detects the surface reflection or penetration, and the image capturing component 202 captures the image to be analyzed of the detecting surface of the object 11 to be detected, and then passes the image to be analyzed through an image capturing process. The image recognition process and a system determination process determine whether the object to be detected 11 has flaws. When it is required to further detect different different objects 11 to be detected or different positions of the object 11 to be detected, only the light source element 201 and the image capturing element 202 need to be controlled in the second track and the first Move on the track. As shown in FIG. 4, the image capturing component 202 is taken as an example. When the image capturing component 202 is moved, the image capturing component 202a may be a first position from the first track. The image capturing component 202b is moved to the second position of the first track. The image capturing component 202 and the two-point position are taken as an example, as long as the light source component 201 and the image capturing component 202 are respectively The second trajectory and the multi-point movement on the first trajectory are not limited to the example of the present case.

In the present invention, the portion of the spherical surface may be a hemispherical area based on the platform 10 or more, as shown in FIG. 1 , a hemispherical area based on the platform 10 or a complete spherical area, such as “FIG. 4”. Shown.

In summary, the optical detecting device of the present invention uses the light source component and the image capturing component to perform multi-point movement on the second moving plane and the first moving plane that conform to the spherical surface, respectively. The device is erected in a fixed manner or moved only in a horizontal manner. Therefore, when the detection condition of the object to be detected is different, the detection condition can be accurately and quickly adjusted to the corresponding detection condition. The detection device has a high degree of freedom of detection. On the other hand, since the light source component and the image capturing component are moved by the second moving plane and the first moving plane that conform to the spherical surface, the detecting light source is provided at different angles and the image to be analyzed is captured. When the working position is not changed, the first working distance, the second working distance, and the accuracy of the detection are not affected, thereby improving the yield of the produced product and greatly reducing the production cost.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

10‧‧‧ platform

11‧‧‧Testables

20‧‧‧Detection unit

201‧‧‧Light source components

202, 202a, 202b‧‧‧ image capture components

30‧‧‧First moving plane

31‧‧‧ second moving plane

40‧‧‧First crankshaft connecting rod

401‧‧‧ first pivot

402‧‧‧Second pivot

41‧‧‧Second crankshaft connecting rod

411‧‧‧ third pivot

412‧‧‧fourth pivot

42‧‧‧First panel

43‧‧‧ Third crankshaft connecting rod

431‧‧‧ fifth pivot

432‧‧‧ sixth pivot

44‧‧‧fourth crankshaft connecting rod

441‧‧‧ seventh pivot

442‧‧‧ eighth pivot

45‧‧‧Second panel

FIG. 1 is a side elevational view of an optical detecting device in accordance with an embodiment of the present invention. Fig. 2 is a schematic view showing a four-link ball type moving mechanism in the first embodiment of the present invention. 3 is a schematic view of a four-link ball type moving mechanism in a second embodiment of the present invention. FIG. 4 is a schematic diagram showing a moving manner of an image capturing component according to an embodiment of the present invention.

10‧‧‧ platform

11‧‧‧Testables

20‧‧‧Detection unit

201‧‧‧Light source components

202‧‧‧Image capture component

30‧‧‧First moving plane

31‧‧‧ second moving plane

Claims (8)

An optical detecting device comprising: a platform having a detecting position for placing a to-be-detected object; and a detecting unit comprising a light source component disposed opposite to the detecting position, an image capturing component moving relative to the detecting position, and a moving mechanism connected to the image capturing component, wherein the moving mechanism controls the image capturing component to move along a first trajectory relative to the detecting position, wherein the moving mechanism comprises a first crankshaft link and a second crankshaft link a first crankshaft link having a first pivot fixed to the platform and a second pivot connected to the first curved panel, the second crankshaft link having a fixed a third pivot of the platform and a fourth pivot connected to the first curved panel, the first curved panel clamping the image capturing component; wherein the first moving track constitutes a first moving plane At least a portion of a spherical surface is equal in distance between the points at which the image capturing element passes the first track and the detected position. The optical detecting device of claim 1, wherein the first curved panel is aligned with the first moving plane. The optical detecting device of claim 1, wherein the light source element moves relative to the detecting position, the moving mechanism controls the light source element to move along a second trajectory relative to the detecting position, wherein the second trajectory One of the second moving planes is configured to conform to at least a portion of a spherical surface such that the distance between the point at which the light source element passes the second track and the detected position are equal. The optical detecting device of claim 1, wherein the light source element is fixed relative to the detecting position. The optical detecting device of claim 1 or 3, wherein the portion of the spherical surface is a hemispherical area based on the platform or more. The optical detecting device of claim 1 or 3, wherein the portion of the spherical surface is a hemispherical area based on the platform. The optical detecting device of claim 1 or 3, wherein the portion of the spherical surface is a complete spherical area. The optical detecting device of claim 1, wherein the image capturing component is a photosensitive coupling component camera or a complementary metal oxide semiconductor camera.