CN113115030A - Multi-station testing equipment for camera module - Google Patents
Multi-station testing equipment for camera module Download PDFInfo
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- CN113115030A CN113115030A CN202110420562.1A CN202110420562A CN113115030A CN 113115030 A CN113115030 A CN 113115030A CN 202110420562 A CN202110420562 A CN 202110420562A CN 113115030 A CN113115030 A CN 113115030A
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Abstract
The invention relates to the technical field of camera module detection equipment, and particularly discloses multi-station test equipment for a camera module, which comprises an operation platform, a rotating platform arranged on the operation platform, a driver arranged below the operation platform and used for driving the rotating platform to rotate forwards and backwards and positioning, and a near view test area, a far view test area, a second intermediate view test area and a first intermediate view test area which are respectively arranged in four directions around the rotating platform, wherein: the close shot test area is used for testing and burning a close shot focal segment of the camera module to be tested; the long-range view test area is used for testing and burning a long-range view focal section of the camera module to be tested; the second middle scene test area is used for testing and burning a second middle scene focus section of the camera module to be tested; the first medium scene test area is used for testing and burning a first medium scene focus section of the camera module to be tested; by adopting the technical scheme of the invention, the synchronous phase detection and burning are realized, the labor cost is reduced, and the detection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of camera module detection equipment, in particular to multi-station test equipment for a camera module.
Background
With the improvement of the consumption level, the performance requirements of the consumer on the camera module, such as the definition and the resolution of the picture, are higher and higher. Because the focusing speed of the Phase Detection Automatic Focusing (PDAF) is relatively fast and the focusing efficiency is high, the existing camera module has more PDAF functions. In the generation process of the camera module with the PDAF function, focusing is generally performed in different focal sections, and the PDAF function is detected. In addition, the OTP technology widely used by the high pixel module needs to be burned to improve the performance of the camera module.
Because of the influence of all aspects of factors, the camera module that produces all has certain difference in the aspect of light and shade, if use the same set of parameter to calibrate the camera lens, the effect often is not satisfactory. If the module is shipped from factory, the calibration of the lens is performed for each module, and the calibration parameters are burned into an OTP (One Time Programmable, camera micro-program controller), when the client displays an image, the client only needs to read the parameters from the camera micro-program controller and apply the parameters to the image, and the imaging effect obtained by the client is very good in consistency. Therefore, when the camera module is produced, burning detection and burning of the camera module are required.
However, the existing recording or PDAF function of the camera module is often detected by different single machines, resulting in low efficiency and high machine cost, and different machines need workers to operate, resulting in high labor cost.
Disclosure of Invention
In order to realize synchronous phase focusing detection and burning, reduce labor cost and improve detection efficiency, the invention provides multi-station test equipment for a camera module.
The basic scheme of the invention is as follows:
a multistation test equipment for camera module, including operation platform, locate operation platform on the platform, locate the operation platform below and be used for driving the driver that the swivel work head just reverses and fix a position and around four directions of swivel work platform be provided with short-range view test area, long-range view test area, No. two medium-range view test areas and a medium-range view test area respectively, wherein:
the close shot test area is used for testing and burning a close shot focal length of the camera module to be tested;
the long-range view test area is used for testing and burning a long-range view focal section of the camera module to be tested;
the second middle scene test area is used for testing and burning a second middle scene focus section of the camera module to be tested;
the first medium scene test area is used for testing and burning a first medium scene focus section of the camera module to be tested;
the circumference of swivel work head divides equally to be equipped with four work piece detection and carries the position, the work piece detects and carries the position and includes accredited testing organization, the camera module that awaits measuring to and be used for the detection position tilting mechanism of perpendicular upset accredited testing organization and the camera module that awaits measuring.
The beneficial effects of the basic scheme are as follows: the near view test area, the far view test area, the second middle view test area and the first middle view test area are sequentially arranged around the front direction, the seat direction, the rear direction and the right direction of the rotary platform, and four workpiece detection loading positions are uniformly arranged in the axial direction of the rotary workbench, so that after the driver drives the rotary platform to rotate forwards and backwards and positions for a certain number of times, the workpiece detection loading positions on the rotary platform can be subjected to phase focusing tests and burning of the near view test area, the far view test area, the second middle view test area and the first middle view test area. Compared with the mode that one person operates one test area in the prior art, the technical scheme realizes that four test areas are operated by one person, so that the labor cost is greatly saved, and the scheme realizes that four test areas are integrated by one device, thereby reducing the cost of purchasing four test devices.
Furthermore, the testing mechanism comprises a base, a first testing board and a testing carrier, wherein the first testing board and the testing carrier are arranged on the base;
the detection position turnover mechanism comprises two first supports and a driving motor, a rotating shaft is arranged between the two first supports, and the rotating shaft is pivoted with the base; the driving motor is arranged on any one first support, and an output shaft of the driving motor drives the rotating shaft and drives the base to vertically turn and position.
Has the advantages that: 1. the test carrier positions the camera module to be tested. When the camera module to be tested is installed on the test carrier, the camera module to be tested is electrically connected with the first test board, and the camera module to be tested is subjected to open and short circuit detection.
2. The output shaft of the driving motor drives a rotating shaft pivoted with the base, and two ends of the rotating shaft are respectively connected with the two first supports, so that the driving motor drives the base to vertically turn and position.
Further, every base is equipped with two side by side survey test panel, the test carrier is fixed through No. two supports with one side of base, just install two camera modules that await measuring on the test carrier.
Has the advantages that: a camera module that awaits measuring is tested to a test panel correspondence to a work piece detects the carrier position and realizes the synchronous detection of duplex position, further promotes detection efficiency.
Further, the close shot test area, the long shot test area, the first middle shot test area and the second middle shot test area all comprise a light source test mechanism;
the light source testing mechanism comprises a mounting plate, a mounting frame, a testing light source and a second testing plate which are arranged in the mounting frame, an adjusting support used for adjusting the angle of the second testing plate, and an adjusting mechanism used for adjusting the distance between the testing plate and the camera module to be tested.
Has the advantages that: the adjusting mechanism adjusts the distance between the test board and the camera module to be tested, and focal length tests with different distances are achieved. The angle that No. two survey test panels is realized to the regulation support is adjustable for when testing at every turn, the angle that No. two survey test panels can both be in best test angle, makes the test more accurate.
Further, the close shot test area, the long shot test area, the first middle shot test area and the second middle shot test area all further comprise burning mechanisms, and the burning mechanisms are used for burning the camera module to be tested.
Has the advantages that: and burning calibration parameters obtained by carrying out phase test on each camera module to be tested into the image camera module to realize lens calibration of the camera module.
Furthermore, the distant view test area also comprises a distant view moving carrying platform and a distant view carrying platform driving mechanism; the long-range moving carrying platform is arranged between the rotary worktable and the light source testing mechanism in the long-range testing area; a first test lens and a first black and white field mechanism are arranged on the distant view moving carrying platform;
the long-range view carrying platform driving mechanism is used for driving the long-range view moving carrying platform to move back and forth;
the first test lens is used for increasing the focal length of the camera module to be tested;
the first black-and-white field mechanism is used for black-and-white field testing of the camera module to be tested.
Has the advantages that: 1. the black field test is used for testing the dead pixel of the camera module to be tested, and the white field test is used for testing the dirty stain of the camera module to be tested.
2. A test lens is used for increasing the focus of the camera module that awaits measuring, realizes the phase place under the bigger focal state and detects to shorten the actual distance that test light source and work piece detected the carrier, and then dwindle the volume of whole organism.
3. The driving mechanism of the distant view carrying platform drives the distant view moving carrying platform to move back and forth, so that the optimal testing positions of the first black-and-white field mechanism and the first testing lens are adjusted, and the testing effect is better.
Further, the second medium scene test area also comprises a second medium scene moving carrying platform and a second medium scene carrying platform driving mechanism; the second medium scene moving carrying platform is arranged between the rotary worktable and the light source testing mechanism in the second medium scene testing area; a second test lens and a second black and white field mechanism are arranged on the second medium moving carrying platform;
the second medium scene moving platform deck driving mechanism is used for driving the second medium scene moving platform deck to move left and right;
the second test lens is used for increasing the focal length of the camera module to be tested;
the second black-and-white field mechanism is used for testing the black-and-white field of the camera module to be tested.
Has the advantages that: 1. the black field test is used for testing the dead pixel of the camera module to be tested, and the white field test is used for testing the dirty stain of the camera module to be tested.
2. A test lens is used for increasing the focus of the camera module that awaits measuring, realizes the phase place under the bigger focal state and detects to shorten the actual distance that test light source and work piece detected the carrier, and then dwindle the volume of whole organism.
3. The driving mechanism of the distant view carrying platform drives the distant view moving carrying platform to move back and forth, so that the optimal testing positions of the first black-and-white field mechanism and the first testing lens are adjusted, and the testing effect is better.
Furthermore, the test carrier comprises a fixed seat and a material loading cover, one side of the material loading cover is pivoted with one side of the fixed seat, and the other side of the material loading cover is clamped with the other side of the fixed seat; the material loading cover is provided with a test slot for positioning and detecting the camera module to be tested.
Has the advantages that: and the test slot positions the camera module to be tested and detects the open short circuit.
Further, the test carrier further comprises a test upper cover, and the test upper cover is used for pressing the material carrying cover through a pneumatic device to tightly press the camera module to be tested on the material carrying cover.
Has the advantages that: the camera module that realizes waiting to await measuring is stable to be positioned and is covered at the year material, avoids the camera module that awaits measuring not have stable location and covers at the year material for survey test panel can't open the short circuit and detect to the camera module that awaits measuring.
The device further comprises a rack, a PC (personal computer), a controller and a trigger keyboard, wherein a display is correspondingly arranged at each workpiece detection carrier position, and the display, the controller, the first test board and the trigger keyboard are electrically connected with the PC.
Has the advantages that: the staff can control the detection flow through triggering keyboard and controller, and the display is used for showing the current detection condition, and the staff of being convenient for in time knows. The PC machine remotely monitors the operation conditions of a plurality of detection devices.
Drawings
Fig. 1 is a schematic view of a multi-station testing apparatus for a camera module according to a first embodiment, with a frame removed;
fig. 2 is a schematic top view of a multi-station testing apparatus for a camera module according to an embodiment.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the system comprises a distant view test area 1, a rotary platform 2, a second middle view test area 3, a first middle view test area 4, a near view test area 5, a workpiece detection carrying position 6, a burning mechanism 7, a light source test mechanism 8, an adjusting support 9, a guide rail 10, a driver 11, a first middle view carrying platform driving mechanism 12, a first test lens 13, a first black and white field mechanism 14, a second middle view carrying platform driving mechanism 15, a second test lens 16 and a second black and white field mechanism 17.
Example one
A multistation test equipment for camera module, as shown in fig. 1 and 2, including frame, PC, controller and trigger keyboard, every work piece detects carrier position 6 and corresponds and is equipped with the display, and display, controller, a test panel and trigger keyboard all are connected with PC electricity. The controller is provided with a switch button for controlling the start/end of the test, the middle part of the rack is provided with an operating platform, the operating platform is provided with a rotating platform 2, and a driver 11 for driving the rotating platform 2 to rotate forward and backward and to be positioned is arranged below the operating platform. In this embodiment, a near view test area 5, a far view test area 1, a second middle view test area 3, and a first middle view test area 4 are sequentially disposed around the front, left, rear, and right directions of the rotating platform 2.
The circumference of swivel work head divides equally to be equipped with four work piece detection and carries position 6, and work piece detection carries position 6 to include accredited testing organization, the camera module that awaits measuring to and be used for the perpendicular upset accredited testing organization and the camera module that awaits measuring to detect a position tilting mechanism. Wherein:
the testing mechanism comprises a base, a first testing board and a testing carrier, the first testing board and the testing carrier are mounted on the base, the testing carrier comprises a fixed seat, a material loading cover and a testing upper cover, one side of the material loading cover is pivoted with one side of the fixed seat, and the other side of the material loading cover is clamped with the other side of the fixed seat; the material loading cover is provided with a test slot for positioning and detecting the camera module to be tested, the camera module to be tested is positioned and installed in the test slot and is electrically connected with a test board, and the test board performs open short circuit test on the camera module to be tested installed in the test slot. The test upper cover is hinged on the material carrying cover and used for pressing the material carrying cover through a pneumatic device, and the camera module to be tested is tightly pressed on the material carrying cover. The problem that the camera module to be tested cannot be subjected to open and short circuit detection by the first testing board due to the fact that the camera module to be tested is not stably installed is avoided.
The detection position turnover mechanism comprises two first supports and a driving motor, wherein a rotating shaft is arranged between the two first supports and is pivoted with the base; the driving motor is arranged on any one first bracket, and an output shaft of the driving motor drives the rotating shaft and drives the base to vertically turn and position.
The near view test area 5, the far view test area 1, the first middle view test area 4 and the second middle view test area 3 all comprise a light source test mechanism 8 and a burning mechanism 7. The burning mechanism 7 is used for burning the camera module to be tested. Light source testing mechanism 8 includes mounting panel, installation frame, the test light source of setting in the installation frame and No. two survey test panel, be used for adjusting No. two regulation support 9 who surveys the test panel angle to and be used for adjusting survey test panel and the adjustment mechanism who awaits measuring the camera module between distance, be equipped with the guide rail 10 that is used for the installation frame to remove on the mounting panel, the below of installation frame be equipped with guide rail 10 sliding fit's slider. The sliding fit of the sliding block and the guide rail 10 realizes the reciprocating and stable movement of the mounting frame in the designated direction.
The close shot test area 5 is used for testing and burning a close shot focal length of the camera module to be tested. In this embodiment, the close shot test area 5 is right opposite to the operation surface of the worker, and the close shot test area 5 is further provided with an upper feeding window and a lower feeding window for the camera module.
The long-range view test area 1 is used for testing and burning a long-range view focal section of the camera module to be tested. Specifically, the distant view test area 1 further comprises a distant view moving stage and a distant view stage driving mechanism; the long-range moving carrying platform is arranged between the rotary worktable and the light source testing mechanism 8 in the long-range testing area 1; the distant view carrying platform driving mechanism is used for driving the distant view moving carrying platform to move back and forth.
The long-range moving stage is provided with a first test lens 13 and a first black-and-white field mechanism 14. The first test lens 13 is used for increasing the focal length of the camera module to be tested. The first black-and-white field mechanism 14 is used for black-and-white field testing of the camera module to be tested. The first black and white field mechanism 14 includes a three axis motion assembly, a white field light source and a black field light source. The white field test is used for testing dirty stains on the camera module to be tested; the black field test is used for testing dead pixels on the camera to be tested.
And the second middle scene test area 3 is used for testing and burning a second middle scene focus section of the camera module to be tested. Specifically, the second medium test area 3 further comprises a second medium movable stage and a second medium stage driving mechanism 15; the second medium scene moving carrying platform is arranged between the rotary worktable and the light source testing mechanism 8 in the second medium scene testing area 3; and a second test lens 16 and a second black-and-white field mechanism 17 are arranged on the second medium moving stage. The second medium scene carrying platform driving mechanism 15 is used for driving the second medium scene moving carrying platform to move left and right; the second test lens 16 is used for increasing the focal length of the camera module to be tested; the second black and white field mechanism 17 is used for black and white field testing of the camera module to be tested. In this embodiment, the second midscape test area 3 is mainly used for performing 30-60 cm phase focusing detection on the camera module to be detected.
The first medium scene test area 4 is used for testing and burning a first medium scene focus section of the camera module to be tested. In this embodiment, the first midscape test area 4 is mainly used for performing 20-40 cm phase focusing detection on the camera module to be detected.
The test process of the camera module to be tested is as follows:
1) when the first workpiece detection carrier 6 moves to the close-range test area 5, the initial state of the first workpiece detection carrier 6 is horizontal. The camera module to be tested is installed in a test slot of the first workpiece detection loading position 6, a switch button is pressed down, the upper test cover presses the material loading cover, and the camera module to be tested is pressed to the material loading cover. Then the detection position turnover mechanism drives the testing mechanism to vertically turn, the material taking and placing state of the camera module to be tested is changed into a vertical testing state from a horizontal material taking and placing state, the camera module to be tested is subjected to open short circuit testing through a first testing board, and then a close shot testing area 5 is used for carrying out close shot focal length testing and burning on the camera module to be tested on the first workpiece detection carrier position 6.
2) The driver 11 drives the rotary platform 2 to rotate clockwise by 90 degrees, at the moment, the first workpiece detection carrier 6 rotates to the distant view test area 1, the three-axis motion assembly moves the black field light source to a test position, black field detection is carried out on the camera module to be tested, then the white field light source is moved to the test position, white field test is carried out on the camera module to be tested, then the distant view carrier driver drives the distant view carrier to move, the first test lens 13 is moved between the camera module to be tested and the test mechanism, and the distant view test area 1 carries out distant view focal segment test and burning on the camera module to be tested; meanwhile, the second workpiece detection carrier position 6 rotates to the close-range test area 5, the camera module to be tested on the second workpiece detection carrier position 6 performs open-short circuit test, close-range focus section test and burning in the close-range test area 5, and the close-range test area 5 performs close-range focus section test and burning on the second workpiece detection carrier position 6.
3) The driver 11 drives the rotary platform 2 to rotate clockwise by 90 degrees, at the moment, the first workpiece detection carrier 6 rotates to the second middle scene test area 3, the three-axis motion assembly moves the black field light source to a test position, the camera module to be detected is subjected to black field detection, then the white field light source is moved to the test position, the camera module to be detected is subjected to white field test, then the second middle scene carrier driver drives the second middle scene carrier to move, the second test lens 16 is moved between the camera module to be detected and the test mechanism, and the second middle scene test area 3 performs second middle scene focus segment test and burning on the camera module to be detected; meanwhile, the camera module to be tested on the second workpiece detection carrier 6 is tested in the distant view test area 1, and the camera module to be tested on the third workpiece detection carrier 6 is tested in the close view test area 5.
4) The driver 11 drives the rotary platform 2 to rotate forward by 90 degrees, at the moment, the first workpiece carrier rotates to the first medium scene test area 4, and the first medium scene test area 4 carries out first medium scene section test and burning on the camera module to be tested. Meanwhile, the camera module to be tested on the second workpiece detection carrier 6 is tested in the second midview test area 3, and the camera module to be tested on the third workpiece detection carrier 6 is tested in the distant view test area 1; and the fourth workpiece detection carrier 6 is tested in the close-range test area 5.
5) The driver 11 drives the rotating platform 2 to rotate reversely by 270 degrees, at the moment, the first workpiece detection carrying position 6 returns to a close range detection area, the detection position overturning mechanism on the first workpiece detection carrying position 6 drives the testing mechanism to overturn vertically, the to-be-tested camera module has a vertical testing state and is changed into a horizontal material taking and placing state, and then material taking and placing are carried out on the material carrying cover. Meanwhile, the camera module to be tested on the station II detection carrying position is tested in the middle scene test area 4; the camera module to be tested on the third station detection carrying position is tested in the second meditope test area 3; and the camera module to be tested on the fourth station detection carrying position is tested in the distant view test area 1.
6) Thus, the production operation is performed according to the above flow cycle.
Example two
The difference from the first embodiment is that: every base is equipped with two test panels one number side by side, and the test carrier is fixed through No. two supports with one side of base, and installs two camera modules that await measuring on the test carrier. And the distant view mobile carrying platform is provided with two groups of first test lenses 13 and a first black and white field mechanism 14, and the two first test lenses 13 respectively correspond to the two camera modules to be tested of the workpiece detection carrying position 6. Two groups of second test lenses 16 and a second black and white field mechanism 17 are arranged on the second medium moving carrying platform, and the two second test lenses 16 respectively correspond to the two camera modules to be tested of the workpiece detection carrying position 6.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A multistation test equipment for camera module, its characterized in that includes operation platform, locates rotary platform on the operation platform, locates the operation platform below and is used for driving the positive and negative driver that rotates and fix a position of rotary platform and around four directions of rotary platform be provided with respectively in short shot test area, long shot test area, No. two medium shot test area and a medium shot test area, wherein:
the close shot test area is used for testing and burning a close shot focal length of the camera module to be tested;
the long-range view test area is used for testing and burning a long-range view focal section of the camera module to be tested;
the second middle scene test area is used for testing and burning a second middle scene focus section of the camera module to be tested;
the first medium scene test area is used for testing and burning a first medium scene focus section of the camera module to be tested;
the circumference of swivel work head divides equally to be equipped with four work piece detection and carries the position, the work piece detects and carries the position and includes accredited testing organization, the camera module that awaits measuring to and be used for the detection position tilting mechanism of perpendicular upset accredited testing organization and the camera module that awaits measuring.
2. The multi-station testing equipment for the camera module according to claim 1, wherein: the testing mechanism comprises a base, a first testing board and a testing carrier, wherein the first testing board and the testing carrier are arranged on the base;
the detection position turnover mechanism comprises two first supports and a driving motor, a rotating shaft is arranged between the two first supports, and the rotating shaft is pivoted with the base; the driving motor is arranged on any one first support, and an output shaft of the driving motor drives the rotating shaft and drives the base to vertically turn and position.
3. The multi-station testing equipment for the camera module according to claim 2, wherein: every base is equipped with two side by side survey test panel, the test carrier is fixed through No. two supports with one side of base, just install two camera modules that await measuring on the test carrier.
4. The multi-station testing equipment for the camera module according to claim 1, wherein: the near view test area, the far view test area, the first middle view test area and the second middle view test area comprise light source test mechanisms;
the light source testing mechanism comprises a mounting plate, a mounting frame, a testing light source and a second testing plate which are arranged in the mounting frame, an adjusting support used for adjusting the angle of the second testing plate, and an adjusting mechanism used for adjusting the distance between the testing plate and the camera module to be tested.
5. The multi-station testing equipment for the camera module according to claim 4, wherein: the near view test area, the far view test area, the first medium view test area and the second medium view test area all further comprise burning mechanisms, and the burning mechanisms are used for burning the camera module to be tested.
6. The multi-station testing equipment for the camera module according to claim 5, wherein: the long-range test area also comprises a long-range moving carrying platform and a long-range carrying platform driving mechanism; the long-range moving carrying platform is arranged between the rotary worktable and the light source testing mechanism in the long-range testing area; a first test lens and a first black and white field mechanism are arranged on the distant view moving carrying platform;
the long-range view carrying platform driving mechanism is used for driving the long-range view moving carrying platform to move back and forth;
the first test lens is used for increasing the focal length of the camera module to be tested;
the first black-and-white field mechanism is used for black-and-white field testing of the camera module to be tested.
7. The multi-station testing equipment for the camera module according to claim 5, wherein: the second middle scene test area also comprises a second middle scene moving carrying platform and a second middle scene carrying platform driving mechanism; the second medium scene moving carrying platform is arranged between the rotary worktable and the light source testing mechanism in the second medium scene testing area; a second test lens and a second black and white field mechanism are arranged on the second medium moving carrying platform;
the second medium scene moving platform deck driving mechanism is used for driving the second medium scene moving platform deck to move left and right;
the second test lens is used for increasing the focal length of the camera module to be tested;
the second black-and-white field mechanism is used for testing the black-and-white field of the camera module to be tested.
8. The multi-station testing equipment for the camera module according to claim 2, wherein: the test carrier comprises a fixed seat and a material carrying cover, one side of the material carrying cover is pivoted with one side of the fixed seat, and the other side of the material carrying cover is clamped with the other side of the fixed seat; the material loading cover is provided with a test slot for positioning and detecting the camera module to be tested.
9. The multi-station testing equipment for the camera module according to claim 8, wherein: the testing mechanism further comprises a testing upper cover, and the testing upper cover is used for pressing the loading cover through a pneumatic device and tightly pressing the camera module to be tested on the loading cover.
10. The multi-station testing equipment for the camera module according to claim 2, wherein: the workpiece detection device is characterized by further comprising a rack, a PC (personal computer), a controller and a trigger keyboard, wherein a display is correspondingly arranged at each workpiece detection loading position, and the display, the controller, the first test board and the trigger keyboard are electrically connected with the PC.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114157857A (en) * | 2021-11-01 | 2022-03-08 | 信利光电股份有限公司 | Camera module qualification detection method based on full depth of field |
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