KR20130028362A - Apparatus for camera module continous test and focus adjustment having position detecting function - Google Patents

Apparatus for camera module continous test and focus adjustment having position detecting function Download PDF

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Publication number
KR20130028362A
KR20130028362A KR1020110091860A KR20110091860A KR20130028362A KR 20130028362 A KR20130028362 A KR 20130028362A KR 1020110091860 A KR1020110091860 A KR 1020110091860A KR 20110091860 A KR20110091860 A KR 20110091860A KR 20130028362 A KR20130028362 A KR 20130028362A
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South Korea
Prior art keywords
camera module
inspection
unit
focusing
focus
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KR1020110091860A
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Korean (ko)
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KR101263391B1 (en
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김대봉
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김대봉
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical means
    • G01B11/26Measuring arrangements characterised by the use of optical means for measuring angles or tapers; for testing the alignment of axes
    • G01B11/27Measuring arrangements characterised by the use of optical means for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02Testing optical properties
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B43/00Testing correct operation of photographic apparatus or parts thereof

Abstract

PURPOSE: A camera module with a position detecting function, a camera module consecutive inspection device, and a focus adjusting device are provided to prevent the separation of a position of the camera module caused by vibration and to facilitate to replace the camera module, thereby enhancing inspection efficiency. CONSTITUTION: A camera module consecutive inspection device, and a focus adjusting device comprises a focusing chart unit(400), a focus adjusting unit(300), a first image inspection unit(130), a second image inspection unit, a camera module mounting unit, a vision unit(110), and a laser unit(120). The focusing chart unit provides a light source chart and a focusing chart. The focus adjusting unit adjusts a focus of the camera module by using the focusing chart. The camera module mounting unit arranges first and second camera module jigs separately. The vision unit detects a position of a barrel included in the camera module.

Description

Camera module continuous inspection and focusing device with position detection function {APPARATUS FOR CAMERA MODULE CONTINOUS TEST AND FOCUS ADJUSTMENT HAVING POSITION DETECTING FUNCTION}
The present invention relates to a camera module continuous inspection and focusing apparatus, and in particular, image inspection, focus inspection, and focus adjustment for the camera module mounted on a digital camera or a mobile phone to continuously perform at least one camera module, the position detection The present invention relates to a camera module continuous inspection and focusing device having a position detection function that supports precise inspection and focus adjustment.
2. Description of the Related Art Generally, a camera module used in a digital camera or a mobile phone camera is composed of a housing equipped with an image sensor and a lens mounted in front of the image sensor, and is configured to digitize an image received through the lens with an image sensor .
These camera modules can be classified into FF (Fixed Focus Type) type and AF (Auto Focus Type) type. The FF type is a fixed module with one focal length, and the AF type has a fixed fixed focal length. However, the focal length can be changed by applying an electric current or voltage to the lens to operate an actuator configured in the lens. Module. The AF type camera module is composed of a lens system composed of a plurality of lenses, and is equipped with a driver such as a voice coil motor (VCM), and is configured to adjust the optical focal length by moving each lens to change its relative distance. .
The camera module performs the process of adjusting the optical focal length and the normal state of the camera module before mounting the camera module in a digital camera or a mobile phone.
In other words, the sharpness, color, and contrast of the image input to the image sensor are set according to the difference between the lens and the image sensor spaced apart, so that the camera using the camera module inspection and focusing device to obtain a constant and clear image After checking whether the module is operating normally and determining whether there is a problem with the focus, if there is a problem with the focus, it is shipped by performing an adjustment process to adjust the focus.
1 is a block diagram of a general camera module inspection and focusing apparatus, which is mounted on a main body 10, a cradle 6 for mounting a camera module 7, and an upper side of the cradle 6. Is provided with a photographing object (1) and the image processing apparatus connected to the camera module (7) mounted on the holder (6). In this case, the photographing object 1 is disposed to be spaced apart from the cradle 6 according to the focal length of the camera module 7, and the image processing apparatus is mounted with the camera module 7 on the cradle 6. Is configured to be connected to the camera module (7).
In order to perform the focus inspection of the camera module 7 in the camera module inspection and focusing device, the distance between the holder 6 and the photographing object 1 should be secured by the focal length of the camera module 7. 10) becomes very large. Therefore, in recent years, by reducing the focal length of the camera module 7 by installing the optical system 5 on the top of the holder (6) on which the camera module 7 is mounted, the photographing object (1) to the camera module (7) The camera module inspection and focusing device has been developed and widely used to reduce the size of the main body 10 by placing it close to.
Specific inspection procedures using the camera module inspection and focusing apparatus include an open / short inspection of the camera module, a resistance value measurement of a power line, a current consumption test, an input / output leakage current test, and the like. It is determined.
In addition, focus inspection and adjustment processes performed before shipment of the camera module include fixed focusing adjustment, image inspection, and AF driving inspection to determine the depth of engagement by precisely rotating the lens to fit a specific fixed focal length. The focusing is a process of inspecting the fixed focus of the lens, and the image inspection is a process of inspecting the output image of the camera module for defects or defects of unit pixels or scratches or particles in the sensor. It is a process to check whether there is a malfunction of the auto focus function that is implemented by operating a driving unit such as VCM which the camera module itself has.
However, in the related art, since a single camera module can be inspected and adjusted only by a single camera module inspection and focusing device, a continuous inspection and adjustment process for a plurality of camera modules is not possible at the same time. If the module needs to be inspected, the test takes a long time, which causes a problem in that the test yield drops.
In addition, in order to focus on the camera module, the collet for focusing should be lowered closer to the lens of the camera module to be inspected to perform focus inspection and adjustment. In this case, it is difficult to precisely measure the focus due to the contact pressure of the collet on the lens because the contact pressure of the collet is poor, or the lens of the camera module is damaged when the collet is excessively lowered. There was a problem that often occurs.
In addition, the collet is formed with a knob at the bottom, the knob is coupled to the groove of the barrel formed on the top of the camera module to rotate the barrel while the collet is rotated to adjust the lens position of the camera module. The process of precisely combining the grooves is difficult, so it is usually arranged to manually engage the knob of the camera module with the groove of the barrel.
When mounting the camera module by manual operation and arranging the groove and the knob to interlock with each other, the collet falls and the camera module is separated from the original position due to vibration because the precision is considerably lowered, and the knob and the groove come into contact with each other. This adds inefficient work time, such as readjustment, which results in a long inspection time, resulting in poor product yield and poor precision measurement.
In addition, if the distance between the optical system, the object, or the camera module is different according to the specification of the camera module during the focus inspection process, and the alignment is not done properly, an error of the inspection according to the difference of angle of view occurs, so that the accurate inspection and focus There was a problem that no adjustment was made.
In particular, the inspection and focusing apparatus of the existing camera module as described above is required to repeatedly raise and lower the collet in order to rotate the barrel located above the camera module in the process of focusing, rotation of the barrel by the collet Afterwards, since corrective work is required every time the camera module is displaced, the work time of inspection and focus adjustment is further increased, and various problems occur as the collet moves up and down.
Korean Registered Patent No. 0947041
In order to solve the above problems, the present invention is fixed by the base for mounting the camera module and the collet, by varying the position of the shooting object to prevent the deviation of the position of the camera module by vibration and to facilitate the replacement and inspection and The purpose is to provide a device that can greatly increase the time and efficiency of the focusing process.
In addition, the present invention by measuring the interval between the collet and the camera module to detect the height of the barrel and thereby precisely control the degree of falling of the collet, thereby removing the contact pressure caused by the collet and at the same time rotation of the camera module for focusing It is an object of the present invention to provide a device for precisely this.
In addition, the present invention eliminates the repetition of the collet raising and lowering for the conventional focusing and inspection, which greatly shortens the time of the inspection and focusing process and at the same time causes the camera module to be caused by the rotation of the barrel by the collet. The object of the present invention is to provide a device that can solve various problems such as distortion and angle of view.
In addition, the present invention to automatically recognize the barrel for rotation on the top of the camera module and to adjust the position of the camera module jig seating the camera module based on the position of the barrel, the knob provided in the collet is exactly the groove of the barrel The purpose of the present invention is to provide an apparatus for greatly improving inspection accuracy and reliability while reducing inspection and focusing time.
The camera module continuous inspection and focusing device having a position detection function according to the present invention for achieving the above object is a focusing chart unit for providing a light source and a focusing chart, and focusing of the camera module using the focusing chart. A focus adjusting unit for adjusting a focal length of the camera module by using a collet, a first image inspecting unit and a second image inspecting unit arranged to be spaced apart from each other by a predetermined distance from the focus adjusting unit and performing an image inspection; A camera module mounting unit for disposing the first camera module jig and the second camera module jig on which the module is seated by the predetermined distance, and transferring them to the left and right, and the arrangement of the barrel provided in the camera module seated on the camera module jig. Vision unit for detecting the; and Laser unit for detecting the height of the barrel, the vision And adjusts the collet position of the focus adjuster to move up and down so that the knob configured to collet the collet of the focus adjuster in a non-contact state according to the arrangement and height of the barrel provided in the camera module by the laser unit. Then, focus is adjusted through the focus adjusting unit, and image inspection is performed on the other of the first and second camera module jig while performing the focus adjustment on any one of the first and second camera module jig. It can be characterized by.
In this case, the camera module holder may be repeatedly transported from side to side, and the inspection of the plurality of camera modules may be continuously performed by repeatedly performing the image inspection or the focus adjustment.
The apparatus may further include a position adjusting unit which moves the camera module mounting unit left and right in association with a predetermined rail and adjusts the front, rear, left and right positions of the camera module mounting unit according to the arrangement detection of the barrel of the vision unit. .
In this case, the position adjusting unit adjusts the position of the camera module mounting unit according to the arrangement detection of the barrel of the vision unit so that the first camera module or the second camera module is the first image inspecting unit, the second image inspecting unit, or the focus adjusting unit. It can be characterized in that the alignment to eliminate the significant difference in angle of view when inspecting.
On the other hand, further comprising a first support provided with a rail for guiding the lifting of the focus adjustment unit, the first support is lowered when the alignment of the camera module and the focus adjustment unit is completed, the lifting after the inspection of the focus adjustment unit, When descending, the knob provided in the collet may be lowered to a non-contacting position with the groove of the barrel according to the height detection of the barrel of the laser unit.
In addition, the focusing unit may be in contact with the knob and the groove of the barrel in accordance with the rotation of the collet to adjust the focus of the camera module to induce the rotation of the barrel, and when the focus check the knob in contact with the groove of the barrel again Can be located.
In addition, a rail for guiding the lifting and lowering of the focusing chart part may be provided in the main body, and at least a part of the main body may further include a second support part which is transferred left and right by the rail.
In this case, the second support part may align the focusing chart part so as to eliminate a significant difference in angle of view during inspection according to the alignment of the camera module and the focus adjusting part by the vision part and the laser part.
In addition, the first image inspecting unit or the second image inspecting unit may extend the cylinder embedded automatically before the next inspection, align the inspection camera module with the image inspection head, and reduce the cylinder after the inspection ends.
On the other hand, the focusing unit performs an auto focus check and focus adjustment, and when the camera module is mounted on the first camera module jig and the second camera module jig and a current is applied to the sensor, the focus unit may perform an OST or a current test. .
The first image inspecting unit or the second image inspecting unit may perform at least one inspection among a shading inspection, an image foreign matter inspection, a black spot inspection, a color spot inspection, and an FPN inspection.
According to the present invention, the positioning unit for fixing the base, and adjusting the position of the focusing unit positioned on the base, the focusing chart unit, and the plurality of camera module jigs on which the camera module is seated is arranged through the vision unit and the laser unit; Not only is it pre-adjusted to the optimum position through height detection, but also the position is adjusted by independent driving, which minimizes vibration, greatly improving the accuracy of focusing and inspection and image inspection, and simultaneously focusing and During the inspection process, it is possible to reduce the inspection time and greatly increase the inspection efficiency by performing image inspection on another camera module and detaching and attaching a new camera module at the same time.
In addition, the present invention by determining the height of the barrel by measuring the distance between the collet and the camera module to precisely control the falling degree of the collet, while removing the contact pressure caused by the collet while at the same time the rotation of the camera module for the focus point accurately It is effective to further improve the inspection precision.
In addition, the present invention, since the focus adjustment and inspection is made continuously in the state in which the focus adjustment unit is lowered to maintain the original position, the difference between the positional deviation of the camera module caused by the repeated ascending and descending of the collet of the focus adjustment unit It is effective to solve the same problem.
In addition, the present invention is to automatically recognize the barrel for rotation on the top of the camera module and to adjust the position of the camera module jig seating the camera module based on the arrangement of the barrel, the knob provided in the collet is exactly the groove of the barrel In this case, the inspection and focusing time can be shortened, and inspection accuracy and reliability can be greatly improved.
1 is a block diagram of a general camera module inspection and focusing device.
2 to 3 is a configuration diagram of a camera module continuous inspection and focusing apparatus having a position detection function according to an embodiment of the present invention.
4 is an exemplary view illustrating the operation of the first and second image inspecting units according to an exemplary embodiment of the present invention.
5 is a detailed configuration diagram of the focusing unit and the first support unit according to the embodiment of the present invention;
Figure 6 is a detailed configuration of the position adjusting unit and the first and second camera module jig according to an embodiment of the present invention.
7 is a detailed configuration diagram of a focusing chart part and a second support part according to an embodiment of the present invention;
8 is an exemplary view illustrating an operation of a camera module continuous inspection and focusing device having a position detection function according to an embodiment of the present invention.
Figure 9 is an illustration of the collet position adjustment using the laser unit and the vision unit according to an embodiment of the present invention.
10 is an exemplary view showing the position of the knob of the collet and the groove of the barrel according to the lowering of the focusing unit according to the embodiment of the present invention.
11 is a view illustrating operation between the knob and the groove of the barrel according to the rotation of the collet according to the embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
2 to 3 is a detailed configuration of the camera module continuous inspection and focus adjustment apparatus having a position detection function.
The camera module continuous inspection and focus adjustment device having the position detection function, as shown, focusing chart unit 400 for providing a light source and a focusing chart, focusing the camera module using the focusing chart unit 400 And a first image inspection unit configured to perform an inspection and to perform an image inspection by arranging a focus adjusting unit 300 for adjusting a focal length of the camera module using a collet and a predetermined distance left and right from the focus adjusting unit 300, respectively. Camera module mounting for transporting the 130 and the second image inspection unit 140, the first camera module jig 150 and the second camera module jig 160, on which the camera module is seated, are separated by the predetermined distance and moved to the left and right. The vision unit 110 for detecting the barrel arrangement of the camera module seated on the camera module jig 150 and 160 and the height of the barrel seated on the camera module jig are detected. Includes a laser unit 120, and the knob configured in the collet 320 of the focusing unit 300 according to the arrangement and the height of the barrel detected by the vision unit 110 and the laser unit 120 is After rotating and raising and lowering the collet of the focus adjusting unit 300 to be engaged with the barrel in a non-contact state, the focus adjustment and inspection are performed through the focus adjusting unit 300, and the first and second camera module jig 150 are mounted. , 160, while performing focus adjustment and inspection on any one of the first and second camera module jigs 150 and 160, an image inspection is performed.
The focus adjusting process includes a process of checking and adjusting the focal length by the focus adjusting unit 300.
The camera module continuous inspection and focusing device equipped with the position detection function includes an open / short test (OST: Open / Short Test, OST), a current test, an auto focusing test, and an auto focusing test. ), Proceed to Image Test.
Examples of the image inspection include shading, defect (black, RGB), blemish, and FPN inspection.
Camera module continuous inspection and focusing device equipped with a position detection function according to an embodiment of the present invention OST, current inspection, focus inspection and adjustment, shading inspection, image foreign matter and black spot, color spot inspection (Image Blemish & Defect Test) and Note that the FPN test can be performed and the type or order of the test can be changed or added / deleted.
In addition, the camera module continuous inspection and focusing device having a position detection function according to an embodiment of the present invention is the arrangement of the barrel provided in the camera module through the vision unit 110 and the focus before the focus adjustment and inspection step In accordance with the detection of the height of the barrel through the laser unit 120 to detect the exact position of the camera module to be inspected so that the focus adjustment and inspection process can be made precisely and quickly.
An embodiment of the detailed configuration of the above-described image inspection and each component for further improving the efficiency of focusing and inspection will be described in detail with the related additional drawings based on FIGS. 2 to 3.
First, the first and second camera module jig (150, 160) provides a space in which the camera module is seated as shown, and exposes the barrel provided in the camera module to the outside and at the same time the seated camera module Covers 151 and 161 for securing are provided. Accordingly, the camera modules can be easily attached to and detached from the first and second camera module jigs 150 and 160 by rotating the covers 151 and 161, and the seated camera module is attached to the covers 151 and 161. ) Can be fixed.
In addition, the first and second camera module jig (150, 160) is spaced apart from the camera module mounting portion 800 by a predetermined distance, the camera module mounting portion 800 is the base 900 in which the components are installed It is guided to move from side to side through the transfer rail (1000) located on the), thereby transferring the first and second camera module jig (150, 160) to the left and right.
According to the transfer of the first and second camera module jig 150, 160, the components arranged to face the respective camera module jig 150, 160 operate. First, the first or second image When the first and second camera module jigs 150 and 160 are transferred and arranged to face each other, the inspection units 130 and 140 perform image inspection on the camera module jig.
As shown in FIG. 4, the first or second image inspecting unit 130 or 140 may include the image inspecting heads 131 and 141 having a cylinder 132 and 142 for the convenience of replacing the next camera module at the beginning and the end of the image inspecting. It can be transferred back and forth by.
That is, the image inspection heads 131 and 141 are designed to be convenient for an operator who detaches the camera module 700 from the camera module jig 150 and 160 by reducing the cylinders 132 and 142 after being transported to the rear. can do.
The first or second image inspecting units 130 and 140 may perform various inspections for measuring image resolution of the camera module after the focus inspection and focus adjustment process is completed.
For example, shading inspection, image foreign matter and black spot, color spot inspection, and FPN inspection are performed, and the shading inspection sets 49 regions in the overall size to display luminance, RGB (Red, Green, Blue) values for each region. Read and test the color and contrast using the deviation value for each area. This can be performed at the same time as the image foreign matter, black spot, color point inspection. The FPN inspection determines line noise of an image, and can be set horizontally and vertically.
In addition, when any one of the first and second camera module jig 150, 160 is aligned to face the vision unit 110, the vision unit 110 is exposed to the outside of the camera module jig. The barrel of the module may be sensed and the arrangement of the barrel may be detected. In this case, the vision unit may detect the arrangement of the barrel based on the arrangement of the grooves formed in the barrel.
According to the arrangement detection of the barrel of the vision unit 110, the focus adjusting unit 300 rotates the collet in advance so that the knob provided at the lower portion of the collet 320 is engaged with the groove provided in the barrel. If the camera module jig is aligned to face the focusing unit 300 according to the position of the camera module jig in advance, the focusing unit 300 immediately descends so that the focus can be adjusted so that the focusing time is required. Can be greatly shortened. Detailed description thereof will be given below.
On the other hand, when any one of the first and second camera module jig is aligned to face the laser unit 120, the laser unit 120 detects the distance between the camera module and the focusing unit 300 The height of the barrel can be detected.
The position of the barrel is determined according to the arrangement of the vision unit 110 and the laser unit 120 and the height is detected, and the focusing unit 300 includes the knob provided in the collet 320 according to the determined position of the barrel. A predetermined position for non-contacting engagement with the groove of the barrel may be determined, and the position of the knob and the barrel may be engaged with each other by descending to the determined position.
As such, the grooves of the knob and the barrel are engaged with each other in a non-contact manner so that the focus is out of a desired adjustment value due to the breakage of the lens due to the contact pressure of the existing collet 320 or the vibration generated when the collet 320 is rotated. Can be easily prevented. That is, fine control of the focus adjustment can be ensured. Detailed description thereof will also be described below.
Any one of the first and second camera module jig (150, 160) of the position detection is completed, including the position and height of the barrel provided in the camera module through the vision unit 110 and the laser unit 120 as described above Are moved to the focusing unit 300 so as to face each other.
At this time, the focusing unit 300 is configured in the form of a barrel as shown in Fig. 5 (a), the optical system 310 such as a collimator lens may be configured on the upper portion of the barrel to shorten the focal length, wherein The collimator lens supports the angle of view of the camera module so that the light source provided from the focusing chart unit 400 can be easily focused on the camera module even at a short distance, thereby greatly reducing the volume of the entire apparatus.
In addition, the focus adjusting unit 300 is connected to each other through a first support 600 and rails 610 and 620 separately configured on the base 900 as shown in FIG. 5 (b). Rails 610 and 620 of the support part 600 guide the lifting and lowering of the focus adjusting part 300. In this case, in order to firmly support the focus adjuster 300, the first support part may include a plurality of rails 610 and 620 and may be connected to the focus adjuster 300. Through this, the vibration caused by the falling of the focusing unit 300 is minimized.
In addition, the focus adjustment unit 300 is provided with a collet 320 for adjusting the focus of the camera module in the lower portion of the barrel, as shown in Figure 5 (c), the knob 321 in the lower portion of the collet 320 It may be formed in a size that is in contact with the groove of the barrel provided on the camera module in contact with each other.
Accordingly, when the focusing unit 300 and the camera module are aligned to face each other, the focusing unit 300 is lowered to adjust the focus of the camera module, and the focusing unit 300 is the vision unit 110 and the laser unit 120. The degree of descending may be automatically adjusted so that the knob 321 is located at a predetermined position in which the knob 321 is in non-contacting contact with the groove of the barrel according to the arrangement and height of the barrel detected by the barrel.
In this case, the vision unit 110 and the laser unit 120 may be directly connected to the left and right of the focus adjustment unit 300.
In addition to the basic configuration as described above, the camera module continuous inspection and focusing device having the position detection function replaces the camera module jig (150, 160) according to the type of camera module or focusing chart unit 400 according to the type of inspection By replacing the focusing chart of), it is possible to perform inspection according to various camera modules.
However, according to the model change of the camera module and the change of the focusing chart, the inspection position of the camera module seated on the camera module jig 150 and 160 or the optimal position for condensing the light source provided from the focusing chart may be changed. Accordingly, the position of the camera module jig (150, 160) or the position of the focusing chart unit 400 is required.
To this end, first, as shown in FIG. 6, in order to correct the position according to the change of the model of the camera module, the position adjusting units 170 and 180 for controlling the position of the camera module jig 150 and 160 are controlled by the camera module. It may be configured between the jig (150, 160) and the camera module mounting portion (800).
The position adjusting units 170 and 180 may transfer the camera module jig 150 and 160 in X and Y coordinates according to the position detection of the barrel of the vision unit 110. You can move forward, backward, left and right. In addition, the position adjusting unit (170, 180) is connected to the camera module mounting portion 800 is transferred with the camera module jig (150, 160) in accordance with the transfer of the camera module mounting portion (800).
Accordingly, the position adjusting units 170 and 180 are positioned at the optimum positions of the camera module jig 150 and 160 so that the focus adjusting unit 300 and the image inspecting unit 130 and 140 can easily inspect the camera module. By controlling the position can be adjusted to be aligned with the focus adjusting unit 300 or the image inspection unit (130, 140).
In addition, when the focusing chart is changed as described above, in order to focus the light source of the focusing chart on the camera module, the entire position of the base unit 900 must be adjusted. Accordingly, the position of the camera module is changed or fine due to the vibration. Difficult to adjust, causing frequent test errors. As a result, the reliability and accuracy of the inspection is poor.
To this end, as shown in FIG. 7, an additional second support part 500 for transferring the focusing chart part 400 provided with the focusing chart is provided.
The second support part 500 is separately provided on the base part 900 to support the focusing chart part 400, and is connected to the focusing chart part 400 and the rails 510 and 520 to provide the focusing chart. The chart unit 400 may be guided up and down. At this time, in order to ensure the robustness when the focusing chart unit 400 is connected, it may also be composed of a plurality of rails (510, 520).
This makes it possible to easily select the focusing chart unit 400 as a corresponding position when replacing the inspection target module, and to quickly respond to various measurement targets by making a template if necessary.
In addition, the second support part 500 has rails 530 and 540 configured to guide the body part to move left and right, and thus the main body part may be transferred to the left and right. According to the left and right transfer of the main body of the second support unit 500 as described above, the focusing chart 400 may be transferred to the left and right together.
According to the above-described configuration, the focusing chart unit 400 may be moved forward, backward, left, and right, and the focusing unit 300 and the camera may be disposed at an optimal position in response to the change of the focusing chart unit 400. You can align with the module.
The camera module continuous inspection and focusing device having the above-described position detection function further includes an integrated controller that is responsible for driving LEDs and input / output control for the light sources of the focusing chart unit and driving of the motors involved in the drive. It can be configured to include. Examples of the driving include the transfer of the cylinder of the first or second image inspection unit 130 and 140, the lifting and lowering of the focus adjusting unit 300 of the first support unit 600, and the focusing chart unit of the second support unit 500 ( Before, after, left and right for 400, the front and rear, left and right for the camera module jig 150, 160 of the position adjusting unit 170, 180 and the collet 320 of the focusing unit 300 Rotation about), etc. can be mentioned.
In this case, the integrated controller may control the driving according to the position detection of the barrel of the vision unit 110 and the laser unit 120.
Hereinafter, the operation sequence of the camera module continuous inspection and focus adjustment apparatus having a position detection function according to an embodiment of the present invention will be described in detail with reference to FIGS. 9 to 11 based on the above-described configuration. do.
First, the first and second camera module jigs 150 and 160 mounted on the camera module mounting part 800 are guided along the transfer rail 1000 to guide the first and second camera module jigs 150 and 160. ) May be arranged so as to sequentially face each of the first or second image inspecting units 130 and 140, the vision unit 110, the focusing unit 300, and the laser unit 120.
Hereinafter, the following process will be described in detail with an example in which the first camera module jig 150 is positioned in the first image inspecting unit 130, but the second camera module jig 160 is configured to be the second. The camera module holder 800 may be configured as the first or the first booting device when the camera module holder 800 is first booted after the camera module holder 800 is terminated in an arbitrary position. 2 The camera module jig 150 or 160 may be aligned with any one of the first or second image inspecting units 130 and 140 to start the inspection.
First, in a state where the first camera module jig 150 is aligned with the first image inspecting unit 130, the user may attach the camera module to the first camera module jig 150 located in the first image inspecting unit 130. The control signal for starting the test can be input by seating the.
At this time, when the camera module is seated on the first camera module jig 150, at the same time performs the OST. The OST indicates the open / short value of the current module pin, and can check up to 32 pins, which can be set according to the camera module.
In addition, the operation of the camera module when the operating current is performed. The operating current test can check up to eight channels (ch) and can also be set according to the camera module.
When the inspections are finished, the camera module mounting unit 800 transfers the first camera module jig 150 and the second camera module jig 160, so that the first camera module jig 150 is the vision. It may be aligned to face the unit 110. (S2)
At this time, the vision unit 100 detects the arrangement of the barrel 710 provided in the camera module as shown in FIG. 9, for example, x, y coordinates of the center of the barrel 710 and the barrel ( The arrangement angle of the groove 711 provided in the 710 may be detected and recognized.
Through this, the focusing unit 300 may recognize the angle of the groove 711 and rotate the collet 320 to adjust the position so that the knob 321 of the collet 320 is engaged with the groove. have. In addition, the position adjusting unit 180 connected to the first camera module jig 150 transfers the first camera module jig 150 to the front, rear, left, and right according to the x and y coordinates to move the collet 320. The center of the barrel 710 can be adjusted to coincide with the center.
Accordingly, the knob 321 of the collet 320 may be precisely engaged with the groove 711 of the barrel 710.
When the above process is completed, the camera module mounting unit 800 may transfer the first camera module jig 150 to be aligned to face the laser unit 120 (S3).
In this case, the laser unit 120 detects the distance h between the focus adjusting unit 300 and the barrel 710 of the camera module as shown in FIG. 9 (a) to increase the height of the barrel 710. It may be detected, and accordingly, the degree of falling of the focus adjusting unit 300 may be determined.
Thereafter, the camera module holder 800 may transfer the first camera module jig 150 to align the first camera module jig 150 and the focus adjuster 300 to face each other. S4)
Next, the focusing unit 300 is a groove 711 of the knob 321 configured in the collet 320 and the barrel 710 configured in the camera module according to the height detection of the barrel of the laser unit 120. 9) can be lowered along the rail of the first support 600 to engage non-contacting as shown in FIG. 9 (b), and perform inspection related to focus adjustment, and lower until the focus adjustment and inspection are completed. You can keep the position.
At this time, the focusing unit 300 may rotate the collet 320 to the position where the most optimal value based on the resolution test, as shown in Figure 10, so that the knob 321 is a barrel ( The barrel 710 is rotated in contact with the groove 711 of the 710. In addition, as the barrel 710 rotates, the lens of the camera module is moved up and down to adjust the focus.
At this time, the resolution test is a numerical value of the focusing chart of the focusing chart unit 400, and displays a value, and passes if the respective areas match the set standard. In addition, the criterion of the resolution test is compared to the specification of the deviation value of the surrounding areas and reflected in the final determination. In this case, the focusing chart may be configured as a TV bone chart.
In addition, in order to increase the accuracy of the resolution test, the focusing chart part 400 is moved up and down along the rail formed in the second support part 500 and the rail formed in a part of the second support part 500 as described above. And a left and right movement, thereby not only allowing the camera module and the focusing unit 300 and the focusing chart unit 400 to be exactly aligned in a straight line, but also eliminating significant differences in angle of view according to the specifications of the camera module. Ascending and descending of the focusing chart unit 400 may be adjusted.
Meanwhile, when the knob 321 of the collet 320 and the groove 711 of the barrel 710 continuously contact each other in the focusing process of the focus adjusting unit 300, the collet 320 may be rotated as well as the vibration caused by the rotation. Vibration caused by external factors such as vibration caused by inertia generated at the end of the rotation is added, and thus the barrel 710 is rotated, thereby reducing the accuracy of focus adjustment.
In addition, a plurality of focus adjustments and focus checks are made until the standard is matched, and rotation of the collet for adjusting the focus occurs for each focus adjustment, so that the vibration is caused by the knob 321 and the barrel 710. When the grooves 711 are in contact with each other, they are transferred and accumulated as they are, thereby reducing the accuracy of the focus adjustment.
Accordingly, the focus adjusting unit 300 may perform operation control as shown in FIG. 11 to reduce the effect of the vibration as described above.
That is, as shown in FIG. 11A, in the state (①) in which the knob 321 of the collet 320 and the groove 711 of the barrel 710 are first disposed to be in non-contacting engagement with each other, When the adjuster 300 rotates the collet 320, one side of the groove 711 and one side of the knob 321 of the barrel 710 rotate in contact with each other as shown in FIG. 11 (b). When the focus adjustment process is finished, as shown in FIG. 11 (c), the focus adjustment unit 300 again moves the knob 321 of the collet 320 and the groove 711 of the barrel 710 into a non-contact state (①). The pressure can be restored so that pressure is not transmitted due to external factors. This can greatly improve the precision of the focusing process.
Meanwhile, when the first camera module jig 150 is aligned with the focus adjusting unit 300 as described above, the second camera disposed on the camera module holder 800 at a predetermined interval from the first camera module jig 150. The module jig 160 is aligned to face the second image inspecting unit 140, and the second camera module jig 160 is in contact with the second camera module jig 150 while focusing and focus checking are performed on the first camera module jig 150. It can be mounted by replacing with another camera module (S4). At this time, when the new camera module is seated on the second camera module jig as described above, it is also possible to perform the OST test for the new camera module.
Subsequently, when the focus adjustment and focus inspection for the first camera module jig 150 is finished, the camera module holder 800 is configured to focus the second camera module jig 160 around the second camera module jig 160. The conveyance for the focus adjustment and focus inspection of 160 may be performed.
In other words, the camera module holder 800 is configured to perform the arrangement and height detection of the barrel for the focus adjustment and focus inspection of the second camera module jig 160, the laser unit 120 and the vision unit. It may be aligned to face 110 sequentially.
At this time, since the second camera module jig 160 is closer to the laser unit 120 than the vision unit 110 as shown in the drawing, first, after detecting height by aligning the laser unit 120 (S5). By aligning with the vision unit 110 and detecting the arrangement of the barrel (S6), the transport distance may be minimized. At this time, the position adjusting unit 170 located between the second camera module jig 160 and the camera module holder 800 according to the arrangement of the barrel 710 transfers the second camera module jig 160. Afterwards, the center of the collet 320 and the center of the barrel 710 may be aligned in a straight line by moving to the left and right, and the barrel constituting the camera module seated on the second camera module jig 160. The collet 320 may be rotated in advance such that the knob 321 of the collet 320 and the groove 711 of the barrel 710 are in contact with each other according to an arrangement angle of the 710.
Subsequently, the camera module holder 800 aligns the second camera module jig 160 with the focus adjusting unit 300 to perform the same focus adjustment and focus inspection process as the first camera module jig 150. It may be (S7).
In this case, when the second camera module jig 160 is aligned with the focus adjusting unit 300, the first camera module jig 150 may be aligned with the first image inspecting unit 130. In this case, the first image inspecting unit 130 is described above when the camera module mounting unit 800 is aligned to extend and face the image inspecting head 131 before the first camera module jig 150 is aligned. One image inspection may be performed. In this case, the image inspection may be performed simultaneously with the focus adjustment and focus inspection of the second camera module jig 160.
That is, after performing the image inspection of the first camera module jig 150 of the first image inspection unit 130, the image inspection head 131 returns to its original position, and the camera module whose image inspection is finished is removed. Then, a new camera module may be attached to the first camera module jig 150, and this image inspection and detachment process may be completed during the focus adjustment and focus inspection of the focus adjusting unit for the second camera module jig 150. Can be.
In addition, when the focus adjustment and focus inspection process of the second camera module jig 160 is finished, the camera module holder 800 again performs focus adjustment and focus inspection based on the first camera module jig 150. And transfer the second camera module jig 160 and the second image inspection unit 140 to face each other when the focus of the first camera module jig 150 is adjusted. The image inspection and detachment process of the camera module of 160 may be performed to continuously inspect the different camera module jig.
As described above, the camera module continuous inspection and focus adjustment device having the position detection function according to the present invention alternately performs the position detection of the barrel for improving the accuracy of the focus adjustment and the focus inspection for each of a plurality of different camera modules. However, when any one of the camera module jig is aligned with the focusing unit, image inspection or detachment of the camera module can be performed simultaneously with the focusing and focusing inspection of the other camera module. It can greatly improve the inspection efficiency and inspection precision.
As described above, the camera module continuous inspection and focusing apparatus according to the embodiment of the present invention includes the first or second image inspection unit, the focusing unit, the vision unit, the laser unit, the position adjusting unit, the focusing chart unit, and the camera module mounting unit according to the inspection procedure. Automated transfer and drive move quickly to the correct position and automatically perform inspections for more efficient and precise inspections.
In addition, the camera module continuous inspection and focusing device can use a viewpack (Viewpack-EX) measuring instrument for measuring the value according to the inspection, it can be used in a general PC.
At this time, in order to measure the inspection values of the two camera modules at the same time in one PC is equipped with two vision pack (visionpack) is configured to operate simultaneously. In addition, when the inspection is focused and adjusted on one side, the other side is performed OST or operating current inspection or image inspection, so that the inspection program built into the PC is configured to show both inspection results on the monitor at the same time desirable.
The inspection of the OST or the operating current can be further shortened because the inspection target camera module is seated on the camera module jig and the operator presses the start button to perform the inspection as the sensor boots.
110: vision unit 120: laser unit
130: first image inspection unit 140: second image inspection unit
131, 141: image inspection head 132, 142: cylinder
150: first camera module jig 160: second camera module jig
151, 161: cover 170, 180: positioning part
300: focusing unit 320: collet
321: knob 400: focusing chart
500: second support portion 510, 520, 530, 540: rail
600: first support portion 610, 620: rail
700: camera module 710: barrel
711: groove of the barrel 800: camera module mounting portion
900: base 1000: transfer rail

Claims (11)

  1. A focusing chart portion for providing a light source and a focusing chart;
    A focus adjusting unit which performs focus adjustment of the camera module by using the focusing chart and adjusts a focal length of the camera module by using a collet;
    A first image inspecting unit and a second image inspecting unit arranged to be spaced apart from each other by a predetermined distance from the focus adjusting unit to perform image inspection;
    A camera module holder configured to move the first camera module jig on which the camera module is mounted and the second camera module jig apart from each other by the predetermined distance and move left and right;
    A vision unit configured to detect an arrangement of barrels provided in the camera module seated on the camera module jig; And
    Including a laser unit for detecting the height of the barrel,
    According to the position and height of the barrel provided in the camera module by the vision unit and the laser unit, the collet position of the focusing unit is rotated and raised so that the knob configured to engage the collet in the non-contact state with the groove of the barrel. After adjusting the down, the focus is adjusted through the focus adjusting unit, and the image of the other one of the first and second camera module jig while the focus adjustment is performed on one of the first and second camera module jig. Camera module continuous inspection and focusing device having a position detection function, characterized in that for performing the inspection.
  2. The method according to claim 1,
    The camera module mounting unit is repeatedly transported from side to side, and the camera module continuous inspection and focus adjustment with position detection function is characterized in that the inspection of a plurality of camera modules continuously performed by repeatedly performing the image inspection or focus adjustment. Device.
  3. The method according to claim 1,
    And a position adjusting unit which transfers the camera module mounting unit left and right in association with a predetermined rail and adjusts the front, rear, left and right positions of the camera module mounting unit according to the arrangement detection of the barrel of the vision unit. Camera module continuous inspection and focusing device with position detection.
  4. The method according to claim 3,
    The position adjusting unit adjusts the position of the camera module mounting unit according to the arrangement detection of the barrel of the vision unit so that the first camera module or the second camera module is connected to the first image inspecting unit, the second image inspecting unit, or the focus adjusting unit. Camera module continuous inspection and focusing device equipped with a position detection function, characterized in that the alignment so as to eliminate significant difference in angle of view during inspection.
  5. The method according to claim 1,
    And a first support having a rail for guiding the lifting and lowering of the focus adjusting unit, wherein the first support is lowered when the alignment of the camera module and the focus adjusting unit is completed, and then the lifting is completed after the inspection of the focus adjusting unit is completed. And a knob provided in the collet is lowered to a position where the knob provided in the collet is in contact with the groove of the barrel in contact with the height of the barrel of the laser unit.
  6. The method according to claim 5,
    The focusing unit induces the rotation of the barrel by contacting the knob and the groove of the barrel according to the rotation of the collet when adjusting the focus of the camera module, and positioning the knob again non-contact with the groove of the barrel during focus inspection. Camera module continuous inspection and focusing device having a position detection function, characterized in that.
  7. The method according to claim 1,
    A rail for guiding the lifting and lowering of the focusing chart part is provided in the main body, and at least a portion of the main body further includes a second support part which is transferred to the left and right by the rail. Inspection and focusing device.
  8. The method of claim 7,
    The second support part includes a camera module continuous with a position detection function, wherein the focusing chart part is aligned so as to eliminate a significant difference in angle of view during inspection according to the alignment of the camera module and the focusing part by the vision part and the laser part. Inspection and focusing device.
  9. The method according to claim 1,
    The first image inspection unit or the second image inspection unit automatically extends the built-in cylinder before the next inspection to align the inspection object camera module and the image inspection head, and after the completion of the inspection to reduce the position detection function Camera module continuous inspection and focusing device.
  10. The method according to claim 1,
    The focus adjuster performs an auto focus check and focus adjustment process,
    Camera module continuous inspection and focus adjustment device having a position detection function characterized in that when the camera module is mounted on the first camera module jig and the second camera module jig and current is applied to the sensor, OST or current inspection is performed. .
  11. The method of claim 1,
    The first image inspection unit or the second image inspection unit, the camera module continuous inspection and focus with a position detection function, characterized in that performing at least one inspection of the shading inspection, image foreign matter inspection, black spot inspection, color spot inspection, FPN inspection Adjustment device.
KR1020110091860A 2011-09-09 2011-09-09 Apparatus for camera module continous test and focus adjustment having position detecting function KR101263391B1 (en)

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CN201210328685.3A CN102998892B (en) 2011-09-09 2012-09-06 Possess camera model follow-on test and the focus control of position detecting function

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