KR102225538B1 - Appearance inspection camera using multi-light for camera module and appearance inspection apparatus comprising that - Google Patents

Abstract

The present invention relates to a camera module appearance inspection camera and a camera module appearance inspection apparatus including the camera module appearance inspection camera including an image sensor module configured to obtain the image of at least a part of a camera module at an inspection position, a lens module provided on the optical path between the inspection position and the image sensor module and configured to adjust a focal length, and a lighting module configured to emit light to the inspection position, wherein the lighting module includes a coaxial lighting unit configured to emit the light to the inspection position coaxially with the optical path, a fiber lighting unit including optical fibers provided along a circumferential path of a predetermined radius with reference to the central axis of the optical path, a dome lighting unit configured to emit light to a reflective surface provided on one side such that reflected light can be emitted to the inspection position, and an inclined lighting unit configured to emit light with the inspection position inclined. With the present invention, the appearance of a camera module and a clear intra-lens assembly image can be obtained from a combination of various lights. Accordingly, the accuracy of appearance inspection can be improved. In addition, the cost and time required for a job change regarding the appearance inspection apparatus can be minimized even when the camera module that is inspected is replaced.

Description

Appearance inspection camera for camera module using multiple lights and appearance inspection device of camera module including the same {APPEARANCE INSPECTION CAMERA USING MULTI-LIGHT FOR CAMERA MODULE AND APPEARANCE INSPECTION APPARATUS COMPRISING THAT}

The present invention relates to an appearance inspection camera of a camera module using multiple lights and an appearance inspection apparatus of a camera module including the same, and more particularly, physical damage of the camera module and defects in appearance can be determined by a combination of various lights. It relates to a device for inspecting the appearance of a camera module.

Recently, with the rapid development of imaging device related technologies, camera modules have been miniaturized and installed in various products. For example, one or more camera modules are provided in a smart phone, a tablet, a PC, and a car to take an image. As camera modules have become smaller, they are being developed in various forms depending on the target product to be installed.

The appearance defects of the camera module include not only defects on the outer surface but also defects present inside the lens assembly. However, due to optical characteristics including reflectance of the lens assembly itself, there is a problem in that it is not easy to inspect the interior of the lens assembly.

Meanwhile, the completed camera module performs various inspections, and an exterior inspection is being performed as one of the inspections. Republic of Korea Patent No. 2057118 has been disclosed in relation to the appearance inspection apparatus of such a camera module. However, when the shape of the camera module to be inspected is changed, such a conventional apparatus for inspecting the appearance of a camera module requires a new manufacturing and replacement of a socket on which the camera module is seated in response to the shape of the camera module. There was this.

Korean Patent Registration No. 2057118

An object of the present invention is to improve the accuracy of the appearance inspection of a camera module performed by a conventional appearance inspection apparatus of a camera module.

In addition, it provides a camera module mounting socket and a camera module exterior inspection device including the same to solve the problem of consuming a lot of time and cost for job change of the exterior inspection device by replacing the camera module to be inspected. Has its purpose.

According to the present invention, an image sensor module configured to acquire at least a part of an image of a camera module at an inspection position, a lens provided on an optical path between the inspection position and the image sensor module, and configured to adjust a focal length It consists of a module and a lighting module configured to irradiate light to the inspection location, and the illumination module is a coaxial illumination unit configured to irradiate light to the inspection location coaxially with the optical path, based on the central axis of the optical path. A fiber illumination unit comprising a plurality of optical fibers provided along a circumferential path of a predetermined radius, and a dome illumination unit configured to irradiate light to a reflective surface provided at one side so that the reflected light can be irradiated to the inspection position. , An inspection camera for the appearance of a camera module including an inclined illumination unit configured to irradiate light by placing an inclination at the inspection position may be provided.

Meanwhile, a light source configured to transmit light to the optical fiber may be further included.

Further, the fiber lighting unit is configured in plural, and the optical fibers of each fiber lighting unit may be arranged along the circumferences of different radii.

On the other hand, the lighting module is configured to be rotationally symmetric, and further includes a lighting frame in which a hollow is formed so that an optical path can be formed in the central portion, and the fiber lighting unit, the dome lighting unit, and the inclined lighting unit are provided on the inner surface of the lighting frame. I can.

Meanwhile, the lighting frame may have a dome-shaped reflective surface configured in a concave shape so that light irradiated from the dome lighting unit is reflected and irradiated to the inspection position.

Meanwhile, the inclined illumination unit may include a first inclined illumination unit and a second inclined illumination unit for irradiating the inspection position at different angles, respectively.

On the other hand, the dome lighting unit and the inclined lighting unit are characterized in that it is composed of LEDs, and may be arranged along a circular path.

Meanwhile, the lens module may include a polymer lens.

In addition, according to the present invention, a socket configured so that a camera module subject to an appearance inspection can be seated, an index table configured such that a plurality of sockets can be provided along the rotation direction, and a socket at the inspection position are mounted. And an inspection camera configured to acquire an image of the camera module, wherein the inspection camera includes an image sensor module configured to acquire an image of at least a part of the camera module at the inspection position, and between the inspection position and the image sensor module It is provided on the optical path and is configured to include a lens module configured to adjust the focal length and a lighting module configured to irradiate light to the inspection position. A coaxial illumination unit configured to irradiate the light, a fiber illumination unit including a plurality of optical fibers provided along a circumferential path of a predetermined radius with respect to the central axis of the optical path, one side so that the reflected light can be irradiated to the inspection position An appearance inspection apparatus of a camera module may be provided including a dome illumination unit configured to irradiate light on a reflective surface provided in the camera module, and an inclined illumination unit configured to irradiate light by placing an inclination at the inspection position.

On the other hand, it may further include a posture conversion unit configured to change the posture by picking up the camera module seated in the socket.

Meanwhile, the fiber lighting unit is configured in a plurality, and at least some of the optical fibers of each fiber lighting unit may be arranged along the circumferences of different radii.

On the other hand, the lighting module is configured to be rotationally symmetric, and further includes a lighting frame in which a hollow is formed so that an optical path can be formed in the central portion, and the fiber lighting unit, the dome lighting unit, and the inclined lighting unit are provided on the inner surface of the lighting frame. I can.

On the other hand, the socket is configured to be installed on an index table for visual inspection of the camera module, and a seating groove formed by placing a step between the upper surface and the upper surface so that the camera module can be seated on the body portion and the upper surface of the body portion, and a seating groove from the outside. It is configured to include a channel formed inside the body so that a negative pressure can be supplied to the body, and the seating groove is provided with a seating groove of different shapes so that at least two different shape camera modules can be seated, and has a different shape. The seating groove may be configured to share at least a portion.

On the other hand, the camera module, a lens assembly including a lens and a sensor, and one side is connected to the lens assembly, and includes a connector formed to extend to the side of the lens assembly, and each of the seating grooves has a shape of one side of the lens assembly. It may include a lens assembly seating groove formed correspondingly and a connector seating groove formed corresponding to the shape of the connector.

Further, the lens assembly seating grooves of the seating grooves of different shapes may be configured to share at least a portion of each other.

In addition, connector seating grooves having different shapes may be provided in different directions on the outer side of the lens assembly seating groove.

Further, the connector seating grooves of different shapes are composed of two, and may be formed to be spaced 180 degrees apart from each other based on the lens assembly seating groove.

In addition, there are four different connector mounting grooves, and may be formed to be spaced apart from each other at 90° intervals based on the lens assembly mounting groove.

Meanwhile, a plurality of channels may be provided, and may be respectively formed in the lens assembly seating groove and the connector seating groove having different shapes.

Meanwhile, the socket can be manufactured by 3D printing.

Meanwhile, a plurality of sockets are configured and arranged on the index table, and the inspection camera may further include an inspection camera moving unit configured to be movable in a horizontal direction so as to photograph a camera module seated in any one of the socket arrangements.

Meanwhile, the posture conversion unit may be configured to simultaneously pick up a plurality of camera modules seated in the socket arrangement to change posture.

The appearance inspection camera of the camera module according to the present invention and the appearance inspection apparatus including the same can obtain clear images of the exterior of the camera module and the interior of the lens assembly by combining various lights, thereby improving the accuracy of the exterior inspection. have.

In addition, even if the camera module to be inspected is replaced, there is an effect of minimizing the cost and time required for job change of the exterior inspection apparatus.

1 is a perspective view of an appearance inspection apparatus according to the present invention.
2 is a perspective view of an inspection camera according to the present invention.
3 is a cross-sectional view of the inspection camera of FIG. 2.
4 is an exploded perspective view of the inspection camera of FIG. 2.
5 is a cross-sectional view of the lighting module.
6 is a cross-sectional exploded perspective view of the lighting module.
7A, 7B, 7C, and 7D are partial cross-sectional views showing an operating state of the inspection camera.
8 is a bottom view showing the operation state of the inspection camera.
9A, 9B and 9C are operational state diagrams of the posture conversion unit.
10A, 10B and 10C are diagrams showing the concept of positional movement of an inspection camera.
11A, 11B, 11C, and 11D are diagrams showing top images of a camera module photographed by different combinations of irradiated lights.
12A, 12B, 12C, and 12D are other views showing the bottom image of the camera module photographed by different combinations of irradiated lights.
13 is a diagram illustrating various examples of a camera module.
14 is a perspective view of a camera module mounting socket according to another embodiment of the present invention.
15 is a perspective view illustrating a channel formed in the camera module of FIG. 3.
16 is a diagram illustrating a state of use of a socket for mounting a camera module.
17 is a conceptual diagram illustrating an example in which a socket for mounting a camera module according to another embodiment of the present invention is manufactured by 3D printing.

Hereinafter, an appearance inspection camera of a camera module and an appearance inspection apparatus including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the following embodiments, the names of each component may be referred to as different names in the art. However, if they have functional similarities and identity, even if a modified embodiment is employed, it can be viewed as a uniform configuration. In addition, symbols added to each component are described for convenience of description. However, the content illustrated on the drawings in which these symbols are indicated does not limit each component to the range within the drawings. Likewise, even if an embodiment in which the configuration in the drawings is partially modified is employed, it can be viewed as an equivalent configuration if there is functional similarity and identity. In addition, in view of the level of a general technician in the relevant technical field, if it is recognized as a component that should be included of course, a description thereof will be omitted.

1 is a perspective view of an appearance inspection apparatus according to the present invention.

Referring to FIG. 1, the apparatus 10 for inspecting the appearance of a camera module according to the present invention may be configured to simultaneously or sequentially and continuously inspect a plurality of camera modules. It may be configured to include the index table 100, the socket 200, the inspection camera 400, and the posture conversion unit 300.

The index table 100 is configured to be rotatable, and configured to move the loaded camera module 1000 in the rotation direction. The index table 100 is configured to be provided with a plurality of camera module mounting sockets 200, which will be described later, and rotated at a certain angle so that each camera module mounting socket 200 can be sequentially positioned at the inspection position. It can be configured as possible. The index table 100 may be configured in a disk shape, and the camera module mounting sockets 200 may be disposed to be spaced apart from each other at equal intervals in the rotation direction. As an example, eight camera module mounting sockets 200 may be disposed to be spaced apart at intervals of 45 degrees along the circumferential direction of the index table 100.

In the socket 200 disposed in the circumferential direction of the index table 100, the camera module 1000 is transported and seated from the outside at the loading position L, and the camera module 1000 is different as the index table 100 rotates by 45 degrees. ) Passes through each inspection location. The camera module 1000 may be moved while rotating along the circumferential direction and then finally moved to the unloading position UL, and may be carried out from the unloading position.

The camera module mounting socket 200 may be configured to allow the camera module 1000 to be mounted. The camera module mounting socket 200 may be configured to have a size that can be positioned in the upper surface when the camera module 1000 is mounted on the upper side. That is, since the camera module 1000 is configured in various sizes, the overall size may be determined by providing a margin so that the camera module 1000 configured with a size within a certain range can be seated on the upper surface with a margin. For example, the upper surface of the camera module mounting socket 200 may be configured as 80 * 40 mm. Meanwhile, the socket 200 may be configured with a plurality of arrays to improve processing speed. As an example, they are adjacent to each other at a point of the index table 100 and may be disposed parallel to each other in a direction perpendicular to the radial direction of the index table 100. Accordingly, as the index table 100 performs an angle conversion once, the plurality of camera modules 1000 may be simultaneously moved to the next inspection position.

Meanwhile, the camera module mounting socket 200 will be described in detail later.

The inspection camera 400 may be configured to photograph and inspect the exterior of the camera module 1000. The inspection camera 400 may be configured to capture a photographing area, that is, one side of the camera module 1000 positioned at the inspection position. The camera module 1000 photographed at the inspection position may be, for example, both side surfaces, a front surface, a bottom surface, a rear surface, a connector 120 and a connector connection part. That is, the inspection camera 400 at each inspection position may be disposed to look at the camera module 1000 from different angles. That is, the plurality of inspection cameras 400 may be provided to be spaced apart at points spaced apart in the rotation direction according to the one rotation angle of the index table 100 described above. As an example, as illustrated in FIG. 1, when the sockets 200 are spaced apart from each other at 45 degree intervals on the index table 100, the inspection camera 400 may also be spaced apart from each other at 45 degree intervals.

The inspection camera 400 may be moved in a horizontal direction to selectively acquire an image with respect to the camera module 1000 mounted on the socket array. One side of the inspection camera 400 may be provided with an inspection camera moving unit 410 and configured to enable linear movement in one direction. The inspection camera moving unit 410 may be configured with a widely known configuration capable of changing the position in the horizontal direction. The inspection camera moving unit 410 may be configured as an example of a linear actuator.

Meanwhile, when the camera module 1000 is seated on the socket 200, a posture conversion unit 300, which will be described later, may be provided in order to obtain an image of the bottom surface.

The posture conversion unit 300 picks up the camera module 1000 seated in the socket 200 at an inspection position for acquiring a bottom image of the camera module 1000, and the bottom of the camera module 1000 is the inspection camera 400 You can switch your posture to face ). The posture conversion unit 300 may include a pickup unit 310 and a driving unit (not shown). The pickup unit 310 is configured to simultaneously pick up a plurality of camera modules 1000 mounted on the socket array. When configured in this way, it is possible to reduce the pickup and posture conversion operation than when the camera module 1000 is picked up one by one and posture is changed.

The pickup unit may be configured such that a pickup mechanism and a rotation mechanism can be implemented. As an example, the pickup mechanism may be provided with a vacuum port and configured to pick up the camera module 1000. The rotation of the pickup unit may be configured to be performed by a driving unit to be described later. The drive unit is configured to rotate the pickup unit and move in the vertical direction, and may be configured with a widely used driving element such as an actuator or a motor.

The posture conversion unit 300 may be disposed so that any one inspection camera 400 may look toward the rotational central axis of the index table 100 for photographing the bottom of the camera module 1000. In this case, the posture conversion unit 300 picks up the camera module 1000 and changes the direction 90 degrees to the outer direction of the index table 100 so that the bottom of the camera module 1000 can face the inspection camera 400. Can be controlled.

Hereinafter, the inspection camera 400 according to the present invention will be described in detail with reference to FIGS. 2 to 6.

FIG. 2 is a perspective view of the inspection camera 400 according to the present invention, FIG. 3 is a cross-sectional view of the inspection camera 400 of FIG. 2, and FIG. 4 is an exploded perspective view of the inspection camera 400 of FIG. 2.

Referring to FIG. 2, the inspection camera 400 according to the present invention may be configured to acquire an image of an inspection position spaced apart from an optical axis by a predetermined distance. The inspection camera 400 may be configured to obtain an image by irradiating light to the inspection position, and to acquire an image while changing a focal length.

The inspection camera 400 may include a lens module 410, an image sensor module 420, and a lighting module 430, and a case 401 surrounding the lens module 410 and the image sensor module 420 It can be configured to include.

The lens module 410 is configured to change the focal length when acquiring an image of the subject at the inspection position, that is, the camera module 1000. The lens module 410 may include one or more lens kits. The lens is configured to change the focal length, and as an example, may be formed of a polymer lens. When the polymer lens is provided, the shape of the lens itself is changed by external force, so that the focal length can be adjusted. In this case, it may include a focal length illumination unit (not shown) configured to change shape by transmitting a force to the polymer lens.

The image sensor module 420 may be configured to generate an electrical signal by photographing a subject. However, since a widely used configuration may be applied to the image sensor module 420, further detailed description will be omitted.

The lighting module 430 may be configured to irradiate the camera module 1000 by irradiating various types of light. Since the camera module 1000 is composed of various shapes and materials, there may be defects that are not discriminated by any one lighting due to optical characteristics such as reflectance and shadow. Therefore, the lighting module 430 can check whether there is a defect in the exterior by irradiating various light having optical differences such as an angle of the irradiated light and an amount of light, and improve the accuracy of whether there is a defect.

The lighting module 430 may be configured to include a plurality of light sources to irradiate various types of light. As an example, the lighting module 430 may include a lighting frame 440, a coaxial lighting part 431, a fiber lighting part 433, a dome lighting part 437, and an inclined lighting part 438 and 439. The lighting module 430 may be configured to be rotationally symmetric with respect to the optical axis as a whole. In addition, the plurality of lighting units provided in the lighting module 430 may be divided into a plurality of regions along the rotation direction, so that whether or not they are operated may be independently determined. As an example, the region may be divided and controlled at intervals of 90 degrees along the rotation direction around the optical axis. When the connector of the camera module 1000 is arranged in one direction, it is possible to obtain a more accurate image than when the connector of the camera module 1000 is irradiated in two directions rather than in the four directions. Accordingly, the image of the camera module 1000 is acquired in a state in which light is irradiated by operating the lighting units provided in two areas spaced 180 degrees apart from each other, and it is possible to determine whether or not there is a defect in an accurate appearance.

The lighting frame 440 serves as a base on which various lighting units, which will be described later, may be provided. The lighting frame 440 may be configured in the form of a cone (CORN) in which one side is adjacent to the lens module 410 side, the other side is adjacent to the inspection position, and the radius becomes wider as it approaches the inspection position. The lighting frame 440 may be formed with a hollow formed in a predetermined diameter at the center side to form an optical path. The lighting frame 440 may be configured in a shape of rotational symmetry based on the above-described optical axis.

Meanwhile, at least two cutting surfaces may be provided on the inner surface of the lighting frame 440 so that the lighting unit may be disposed at various angles. At least two cutting surfaces are configured with different angles from the audit position, and the illumination units disposed on each cut surface can irradiate light to the inspection position at different angles. Meanwhile, a dome-shaped reflective surface 441 may be provided on one side of the lighting frame. The dome-shaped reflective surface 441 is configured to reach the inspection position after the light irradiated from the dome lighting unit 437 to be described later is reflected by the dome-shaped reflective surface 441.

The coaxial illumination unit 431 is configured to irradiate light to the same optical axis as the optical axis through which the image sensor module 420 acquires an image. The coaxial lighting unit 431 may be provided on one side of the above-described lighting frame 440 and may be configured to irradiate light in a direction perpendicular to the above-described coaxial.

A beam splitter 432 may be provided at a point where the optical path of the coaxial illumination unit 431 and the optical axis of the lens module 410 meet. The beam splitter 432 may be configured to pass light directed to the lens module 410 from the inspection position, and reflect the light irradiated from the coaxial illumination unit 431 to be directed to the inspection position.

The fiber illumination unit 433 may be configured to generate a larger amount of light than other illumination units so that the light can reach a space inside the lens kit inside the lens assembly 1100 of the camera module 1000. The fiber lighting unit 433 is provided with a light source 435 on one side so as to irradiate a larger amount of light compared to other lighting units, and a plurality of optical fibers that pass through the lighting frame 440 from the light source 435, and one end thereof is exposed inward. It can be configured to include. A plurality of optical fibers 436 arranged along one circular path may form a bundle and be connected to the light source 435.

The fiber illumination unit 433 may include a first fiber illumination unit 433 and a second fiber illumination unit 434 having different diameters of circular paths on which ends are disposed. Here, the first fiber illumination unit 433 and the second fiber illumination unit 434 refer to portions of the optical fiber bundles exposed to the illumination frame 440 in a circular path. The first fiber illumination unit 433 may be disposed along a circular path having a diameter smaller than that of the second fiber illumination unit 434.

The first fiber illumination unit 433 and the second fiber illumination unit 434 may be connected to a light source 435 capable of generating a large amount of light, respectively. Referring to FIG. 3, as an example, two light sources 435 are provided on both left and right sides of the lens module 410, respectively, through a plurality of optical fibers 436, respectively, through the first fiber illumination unit 433 and the second Light may be transmitted to the fiber lighting unit 434. Therefore, it is possible to selectively irradiate light along circular paths of different diameters. However, the arrangement and number of the optical fibers 436 are only examples and may be modified and applied in various numbers and combinations.

The dome lighting unit 437 is configured to irradiate light to the above-described dome-shaped reflective surface 441 and may be disposed along a circular path. The light irradiation direction of the dome illumination unit 437 is irradiated while looking at the direction opposite to the inspection position, and the light is reflected on the dome-shaped reflective surface 441 to reach the inspection position.

The inclined lighting unit is configured to be inclined toward the inspection position to irradiate light. The inclined illumination unit may include a first inclined illumination unit 438 and a second inclined illumination unit 439 for irradiating light at different angles from the inspection position.

The first inclined lighting unit 438 may be configured to radiate light at an angle greater than the second inclined lighting unit 439 to the inspection position. The first inclined lighting unit 438 and the second inclined lighting unit 439 may be respectively provided on a cutting surface configured with different inclinations on the lighting frame 440. Each of the first inclined lighting unit 438 and the second inclined lighting unit 439 is configured by forming a circular path along a cutting surface, and may be configured to irradiate light while surrounding the inspection position. Meanwhile, a translucent plate 442 formed of a semi-transparent material may be provided at a position adjacent to the first inclined illumination unit so that the light irradiated from the first inclined illumination unit 438 can emit surface light.

The above-described coaxial lighting unit 431, dome lighting unit 437, first inclined lighting unit 438, and second inclined lighting unit 439 may be formed of LEDs. The dome lighting unit 437, the first inclined lighting unit 438, and the second inclined lighting unit 439 are composed of a plurality of LEDs, and may be provided on the lighting frame 440 along a path of rotational symmetry, respectively.

Meanwhile, although not shown, a controller capable of controlling the operation of the index table 100, the vision inspection device, and the posture conversion unit 300 may be provided. Meanwhile, the control unit may include a processor that is generally widely used, and software including an image processing algorithm capable of determining whether an appearance is defective based on the acquired image may be installed.

In addition, the lighting unit may control to acquire an image while irradiating light by selecting at least one of the coaxial lighting unit 431, the fiber lighting unit 433, the dome lighting unit 437, and the inclined lighting unit. As an example, any one lighting unit may be selected, or a plurality of lighting units may be simultaneously operated to simultaneously irradiate light and control to acquire an image.

Meanwhile, although not described above, the appearance inspection apparatus 10 of the camera module 1000 according to the present invention includes a pickup and place module for loading/unloading the camera module 1000, a pickup hand for adjusting the inspection direction, etc. It may be configured to include various configurations applied to a general appearance inspection apparatus of the camera module 1000.

Hereinafter, the operation of the inspection camera 400 according to the present invention will be described with reference to FIGS. 7A to 8.

7a, 7b, 7c, and 7d are partial cross-sectional views showing the operation state of the inspection camera 400. As shown, the controller may operate the lighting module 430 according to a value preset by the user. As an example, only the coaxial lighting unit 431 may be operated (FIG. 7A), or only the first fiber lighting unit 433 may be operated (FIG. 7B). In addition, the first inclined illumination unit 438 and the coaxial illumination unit 431 may be operated simultaneously (FIG. 7C), or the second inclined illumination unit 439 and the dome illumination unit 437 may be simultaneously operated (FIG. 7D). In this way, the controller may control the lighting module 430 so that an apparent defect that is difficult to identify with a combination of various lights can be found.

8 is a bottom view showing an operating state of the inspection camera 400. As shown, light may be irradiated by different combinations of on-off among a plurality of lighting units (FIG. 8(a)). In addition, it is possible to acquire an image of the camera module 1000 after irradiating light by varying the on-off area for each area in one illumination unit (FIG. 8(b)). On the other hand, although not shown, combinations according to a combination of a plurality of lighting units and selection of a divided area may be made in a wide variety.

Hereinafter, an operation of converting the posture of the camera module mounted on the socket using the posture conversion unit will be described with reference to FIGS. 9A to 9C.

9A, 9B and 9C are operational state diagrams of the posture conversion unit 300. As shown, the posture conversion unit 300 may be disposed adjacent to an inspection position for inspecting the bottom surface of the camera module 1000. The standby position of the posture conversion unit 300 becomes the upper side of the bottom inspection position. First, the index table 100 is rotated so that the camera module 1000 to be inspected is moved to a position adjacent to the inspection camera 400 (FIG. 9A). Thereafter, the posture conversion unit 300 descends and then picks up the plurality of camera modules 1000 and ascends (FIG. 9B). Thereafter, the posture conversion unit 300 changes the direction of the pickup unit to 90 degrees so that the plurality of camera modules 1000 that are picked up can face the inspection camera 400 (FIG. 9C). Thereafter, while the inspection camera 400 moves in the horizontal direction, images of the camera module 1000 picked up in the posture conversion unit 300 are sequentially acquired. Thereafter, the posture conversion unit 300 operates in the reverse order to the above-described order to re-mount the plurality of camera modules 1000 in the socket array.

10A, 10B, and 10C are diagrams showing the concept of positional movement of the inspection camera 400. In this drawing, for convenience of explanation, the inspection camera 400 is shown exaggeratedly as being slightly spaced from the socket 200, but the inspection camera 400 is located adjacent to the socket 200 so as to avoid external optical interference. You can acquire the image at As shown, the inspection camera moving unit 410 acquires an image by moving the inspection camera 400 horizontally by the interval of the socket array. At this time, the inspection camera moving unit 410 may be provided in each of the plurality of inspection cameras 400, and the position of each inspection camera moving unit 410 may be independently controlled.

Hereinafter, an image of the camera module 1000 obtained by various combinations of irradiated light according to the present invention will be described with reference to FIGS. 11A to 12D.

11A, 11B, 11C, and 11D are diagrams showing a top image of the camera module 1000 photographed by different combinations of irradiated lights, and FIGS. 12A, 12B, 12C, and 12D are photographed by different combinations of irradiated lights. It is another diagram showing a lower surface image of one camera module 1000.

Referring to FIG. 11, an image obtained by operating the coaxial illumination unit 431 (FIG. 11A), an image obtained by operating the dome illumination unit 437 and the second inclined illumination unit 439 (FIG. 11B), and a first fiber illumination unit An image obtained using (433) (FIG. 11C) and an image obtained using the second fiber illumination unit 434 (FIG. 11D) are shown. In the dome-shaped illumination, an overall image of the top surface is obtained, but an image of the connector of the camera module 1000 and the inner space of the lens kit cannot be reliably obtained. However, in the images obtained by fiber illumination (FIGS. 11C and 11D), the camera module It is possible to obtain a clear image inside the lens kit of (1000).

12A, 12B, 12C, and 12D, an image obtained by operating the coaxial illumination unit 431 (FIG. 12A), an image obtained by simultaneously operating the coaxial illumination and dome illumination and the second inclined illumination unit 439 (Fig. 12b), an image obtained by operating the second fiber illumination unit 434 (FIG. 12C), and an image obtained using the dome illumination unit 437 (FIG. 12D) are shown. As illustrated, when a plurality of metallic materials are provided on the lower surface of the camera module 1000 and it is difficult to determine a defect due to different parts of the reflectance, it is possible to check whether there is a defect in appearance by combining various lights. In particular, the images obtained in FIGS. 12(c) to 12(d) may be used complementarily to determine defects.

That is, the user stores a series of sequences according to the order of operation of the lighting unit in the control unit, the control unit obtains images by examining various combinations in order, and finally determines whether there is a defect by analyzing a plurality of images. However, since such a sequence may be determined by various factors such as shape, size, color, material, etc. according to the type of the camera module 1000, a detailed description thereof will be omitted.

Hereinafter, the socket will be described in detail with reference to FIGS. 13 to 17.

13 is a diagram illustrating various examples of the camera module 1000.

Referring to FIG. 13, various types of camera modules 1000 are illustrated. The camera module may be configured in slightly different forms depending on the purpose, such as a camera module for a smart phone or mobile phone, a camera module for biometric recognition, a camera module for a touch screen, and a camera module for a vehicle. However, the camera module may include a lens assembly 1100 including a lens and a sensor and a connector 120 that may be electrically connected to a main board of an electronic device, regardless of use.

14 is a perspective view of a camera module mounting socket 200 according to another embodiment of the present invention, and FIG. 15 is a perspective view showing a channel 230 formed in the camera module 1000 of FIG. 14.

Referring to FIG. 14, the camera module mounting socket 200 may include a body part, a mounting groove 220 formed in the body part, and a channel 230.

The body part 210 may be configured such that one side may be installed on the index table 100 described above. A mounting groove 220 may be formed on the upper surface of the body 210 by providing a step corresponding to the shape of the camera module 1000 so that the camera module 1000 can be stably seated. When the camera module 1000 is placed in the seating groove, it is naturally fixed by gravity, and when no external force is applied, it can be stably positioned in the seating groove 220.

The seating groove 220 may include a lens assembly seating groove 222 and a connector seating groove 222. The lens assembly mounting groove 222 may be mounted on the lens assembly 1100 of the camera module 1000, and the connector mounting groove 222 may be mounted on the connector 120 of the camera module 1000.

The camera module mounting socket 200 may have a mounting groove configured in various shapes so that the camera modules 1000 of different shapes can be mounted. At this time, the seating grooves of different shapes may be configured to share at least some of them. For example, according to the shape of the camera module 1000, the seating groove may have a first shape, a second shape, a third shape, and a fourth shape, and at least a part of the lens assembly seating groove 221 in each shape Can be shared. Accordingly, the seating groove 220 is a lens assembly seating groove 222 at the center thereof, and the connector seating grooves 222 may be spaced apart from each other at predetermined intervals in an outward direction.

When the mounting grooves corresponding to the shape of the four camera modules 1000 are formed as shown in FIG. 14, the connector mounting grooves 222 may be disposed to be spaced apart from each other by 90 degrees. Meanwhile, when the lens assembly 1100 of the camera module 1000 is located within a certain range within an image captured by the inspection camera 400, the inspection through image analysis can be efficiently performed. Accordingly, the mounting grooves having different shapes may be formed at positions that share or overlap at least a portion of the lens assembly mounting groove 221 on the upper surface of the camera module mounting socket 200.

Here, the first to fourth shapes may be classified according to the similarity of their appearance and size among the various camera modules 1000. That is, the first to fourth shapes shown in FIG. 14 are similar in size of the lens assembly 1100 to each other, and the lengths between the connector 120 and the lens assembly 1100 are slightly different from each other. Each can be configured in a corresponding shape.

On the other hand, although not shown, when composed of two camera modules 1000, the lens assembly mounting grooves 221 are shared with each other, and the connector mounting grooves 222 are spaced 180 degrees with respect to the lens assembly mounting grooves 221. Can be placed. In addition, the various camera modules 1000 are classified according to their size and shape, and a seating groove 220 may be formed corresponding thereto.

Referring to FIG. 15, the camera module mounting socket 200 may have a plurality of channels 230 connected to the mounting groove 220. It is configured to receive sound pressure from the outside, and when the camera module 1000 is seated in the mounting groove, the camera module 1000 can be more stably fixed by providing sound pressure to a plurality of points. In addition, the plurality of channels 230 may be formed in fluid communication with the outside so that an opening on one side is formed in each of the seating grooves having different shapes so that a negative pressure is provided.

Hereinafter, the use of the camera module mounting socket 200 will be described with reference to FIG. 16.

16 is a state diagram of a camera module mounting socket 200 in use.

Referring to FIG. 16A, a first shape camera module to a fourth shape camera module 1001, 1002, 1003, and 1004 are disclosed.

Referring to FIG. 16B, a camera module 1000 configured in a first shape is seated in a mounting groove, and an exterior inspection of the camera module 1000 may be performed. Also, referring to FIG. 16C, the camera module 1000 configured in the second shape may be mounted in a direction different from that of FIG. 16B. In addition, referring to FIGS. 16(d) and 16(e), the camera module 1000 may be seated in a seating groove formed to correspond to a different shape of the camera module 1000, respectively. That is, as the number of camera modules 1000 that can be inspected with one camera module mounting socket 200 increases, the camera module mounting socket 200 can be used without replacing even if the camera module 1000 to be inspected is changed. You will be able to.

On the other hand, in the case of configuring a plurality of such camera module mounting sockets 200 according to the shape of various camera modules 1000, the replacement of the socket can be minimized. It will be possible to minimize the time spent on.

17 is a conceptual diagram illustrating an example in which a camera module mounting socket 200 according to another embodiment of the present invention is manufactured by 3D printing.

Referring to Figure 17, the camera module mounting socket 200 according to the present invention design a mounting groove 220 using the external 3D information of the camera module 1000 and generated by 3D printing by the nozzle 500. I can. When generated by 3D printing, the socket 200 can be manufactured in quick response to changes in the appearance of the camera module 1000, and the production cost can be lowered.

The camera module mounting socket and the camera module appearance inspection apparatus including the same according to the present invention described above include camera modules of various shapes instead of having respective sockets for each camera module, that is, for a variety of camera modules. Since a socket that can be used is provided, even if the camera module is replaced, there is an effect of minimizing the cost and time required for job change of the appearance inspection device.

10: Appearance inspection device of the camera module.
100: index table
200: socket
300: posture conversion unit
400: inspection camera
410: lens module
420: image sensor module
430: lighting module
433: fiber lighting unit

Claims (22)

An image sensor module configured to acquire an image of at least a part of the camera module at the inspection position;
A lens module provided on an optical path between the inspection position and the image sensor module and configured to adjust a focal length; And
It is configured to include a lighting module configured to irradiate light to the inspection position,
The lighting module,
A coaxial lighting unit configured to irradiate light to the inspection position coaxially with the optical path,
A fiber lighting unit including a plurality of optical fibers provided along a circumferential path having a predetermined radius with respect to the central axis of the optical path;
A dome lighting unit configured to irradiate light onto a reflective surface provided at one side so that the reflected light can be irradiated to the inspection position;
An inspection camera for appearance of a camera module including an inclined illumination unit configured to be inclined at the inspection position to irradiate light. The method of claim 1,
An exterior inspection camera of a camera module, further comprising a light source configured to transmit light to the optical fiber. The method of claim 2,
The fiber lighting unit is composed of a plurality,
The optical fibers of each of the fiber lighting units are arranged along a circumference of a different radius. The method of claim 2,
The lighting module,
It is configured to be rotationally symmetric, and further includes a lighting frame in which a hollow is formed so that the optical path can be formed in the central portion,
The fiber illumination unit, the dome illumination unit, and the inclined illumination unit are provided on an inner surface of the illumination frame. The method of claim 4,
The lighting frame,
The inspection camera for appearance of a camera module, characterized in that it is provided with a dome-shaped reflective surface configured in a concave shape so that the light irradiated from the dome lighting unit is reflected and irradiated to the inspection position. The method of claim 2,
The inclined lighting unit,
An inspection camera for appearance of a camera module, comprising: a first inclined illumination unit and a second inclined illumination unit for irradiating the inspection position at different angles, respectively. The method of claim 2,
The dome lighting unit and the inclined lighting unit, characterized in that consisting of LEDs, and arranged along a circular path, the exterior inspection camera of the camera module. The method of claim 2,
The lens module is an exterior inspection camera of a camera module, characterized in that configured to include a polymer lens. A socket configured to allow the camera module to be subjected to the visual inspection to be seated;
An index table configured such that a plurality of sockets may be provided along the rotation direction; And
It includes an inspection camera configured to acquire an image of the camera module seated in the socket of the inspection position,
The inspection camera,
An image sensor module configured to acquire an image of at least a part of the camera module at the inspection position;
A lens module provided on an optical path between the inspection position and the image sensor module and configured to adjust a focal length; And
It is configured to include a lighting module configured to irradiate light to the inspection position,
The lighting module,
A coaxial lighting unit configured to irradiate light to the inspection position coaxially with the optical path,
A fiber lighting unit including a plurality of optical fibers provided along a circumferential path having a predetermined radius with respect to the central axis of the optical path;
A dome lighting unit configured to irradiate light to a reflective surface provided at one side so that the reflected light can be irradiated to the inspection position;
Appearance inspection apparatus of a camera module including an inclined illumination unit configured to be inclined to irradiate light by placing an inclination at the inspection position. The method of claim 9,
Appearance inspection apparatus of a camera module further comprising a posture conversion unit configured to change the posture by picking up the camera module seated in the socket. The method of claim 10,
The fiber lighting unit is composed of a plurality,
At least some of the optical fibers of each of the fiber lighting units are arranged along circumferences of different radii. The method of claim 11,
The lighting module,
It is configured to be rotationally symmetric, and further includes a lighting frame in which a hollow is formed so that the optical path can be formed in the central portion,
The fiber illumination unit, the dome illumination unit, and the inclined illumination unit, the appearance inspection apparatus of the camera module, characterized in that provided on the inner surface of the illumination frame. The method of claim 10,
The socket,
A body portion configured to be installed on an index table for visual inspection of the camera module;
A seating groove formed by placing a step on the upper side of the body so that the camera module can be seated thereon; And
It is configured to include a channel formed inside the body portion so that the negative pressure can be supplied to the seating groove from the outside,
The seating groove is provided with seating grooves of different shapes so that at least two camera modules of different shapes can be seated,
Appearance inspection apparatus of a camera module, characterized in that configured to share at least some of the seating grooves of different shapes with each other. The method of claim 13,
The camera module,
A lens assembly including a lens and a sensor; And
One side is connected to the lens assembly, and includes a connector formed to extend to the side of the lens assembly,
Each of the seating grooves,
Appearance inspection apparatus for a camera module, characterized in that it comprises a lens assembly seating groove formed to correspond to the shape of one side of the lens assembly and connector seating grooves of different shapes formed to correspond to the shape of the connector. The method of claim 14,
Appearance inspection apparatus for a camera module, characterized in that the lens assembly mounting groove of the different shape of the mounting groove is configured to share at least a portion of each other. The method of claim 15,
The appearance inspection apparatus of a camera module, wherein the connector mounting grooves having different shapes are provided in different directions on the outer side of the lens assembly mounting groove. The method of claim 16,
The connector seating grooves of different shapes are composed of two,
Appearance inspection apparatus of a camera module, characterized in that formed to be spaced apart 180 degrees apart from each other based on the lens assembly mounting groove. The method of claim 16,
The connector seating grooves of different shapes are composed of four,
Appearance inspection apparatus of a camera module, characterized in that formed to be spaced apart from each other at 90 degree intervals based on the lens assembly mounting groove. The method of claim 14,
The plurality of channels are provided and are formed in the lens assembly mounting groove and the connector mounting groove of different shapes, respectively. The method of claim 14,
Appearance inspection apparatus for a camera module, characterized in that the socket is manufactured by 3D printing. The method of claim 14,
The sockets are configured in plural and are arranged on the index table,
The inspection camera further comprises an inspection camera moving unit configured to be movable in a horizontal direction so as to photograph the camera module mounted on any one of the socket arrangements. The method of claim 21,
The posture conversion unit is configured to change posture by simultaneously picking up a plurality of camera modules mounted on the socket arrangement.

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