TWI645174B - Camera module glare test machine and glare testing method - Google Patents

Abstract

A camera module glare testing machine includes: a test light box and a light source and a test fixture disposed in the test light box. The test fixture includes: a carrying device, a rotating device, a testing device, a supporting device, and a driving device. The carrying device is used to receive the camera module, and the camera module is used to capture the glare image. The rotating device includes a second carrier plate and a third carrier plate. The carrier device is fixed on the second carrier plate. The second carrier plate can be rotated by a specific angle around the central axis of the lens of the camera module and fixed on the third carrier plate. The test device is used to control the camera module to perform glare image capture. The third carrier plate and the driving device are both fixed on the supporting device, and the driving device is used to drive the third carrier plate to rotate. The invention also relates to a glare test method.

Description

Camera module glare test machine and glare test method

The invention relates to the field of digital image, in particular to a camera module glare testing machine.

In recent years, the smart phone industry has developed rapidly, and the demand for camera modules has also increased substantially. Consumers have higher requirements for the performance parameters of mobile phone cameras. Glare is an important parameter for evaluating cameras and has an important impact on imagery.

The traditional glare test method is: in a dark environment, a tester manually rotates the test fixture to a predetermined angle, and another tester manually captures the image taken by the camera module by clicking a program to complete the glare test. The above test fixture has low rotation precision, and the hand is easy to shake during the photographing process, which is easy to cause abnormality of the screen and increase the difficulty of judgment; it cannot be automated, time-consuming and laborious; it must be carried out in a dark room, and is easily interfered by scattered light of the external environment, causing misjudgment.

In view of this, the present invention provides a camera module glare test machine and a glare test method capable of solving the above technical problems.

A camera module glare testing machine includes: a test light box; a light source disposed in the test light box; a black box disposed in the test light box, the light box is formed with a light passing hole; a test fixture disposed in the test optical box, the test fixture includes: a carrying device, a rotating device, a testing device, a supporting device and a driving device; the carrying device is configured to receive the camera module, The camera module is configured to capture a glare test image; the light source, the light passing hole and the lens of the camera module are oppositely positioned such that light emitted by the light source is vertically irradiated to the lens through the light passing hole; the rotation The device includes a second carrier board and a third carrier board fixed to the second carrier board. The carrier device is fixed on the second carrier board, and the second carrier board can surround the center of the lens of the camera module. The shaft is fixed to the third carrier plate after being rotated by a specific angle with respect to the third carrier board; the testing device is configured to control the camera module to perform glare image capture; the third carrier board and the driving device are both fixed The driving device is configured to drive the third carrier to rotate.

A method for performing glare test using the above-mentioned camera module glare test machine, comprising the steps of: connecting the test device to a computer on which a test program is installed; turning on the light source, and rotating the second carrier plate to a preset one a first test angle; a camera module that needs to test the glare is placed in the carrying device; and the test program is started to perform a glare test on the camera module, specifically: the driving device drives the rotating device to rotate to a preset number In a second test angle, the test box controls the camera module to perform image capture at each second test angle; and according to the image captured by the camera module, it is determined whether the camera module has glare.

The camera module glare testing machine and the testing method thereof have the advantages of high test accuracy and automation; the influence of external reflected light stray light on the test system can be eliminated, and the external influence is small; time saving and labor saving; providing for the camera Level, vertical, and two oblique glare tests in a 45 degree direction for a wide range of coverage.

100‧‧‧ Camera Module Glare Test Machine

10‧‧‧Test light box

11‧‧‧ top board

12‧‧‧Baffle

121‧‧‧ first surface

13‧‧‧floor

20‧‧‧Light source

30‧‧‧Black box

31‧‧‧ second surface

32‧‧‧ third surface

33‧‧‧Lighting hole

40‧‧‧Test fixture

41‧‧‧ Carrying device

411‧‧‧Upper cover

4111‧‧‧ lens hole

412‧‧‧First carrier board

4121‧‧‧First storage slot

42‧‧‧Rotating device

421‧‧‧Second carrier board

4211‧‧‧Fourth surface

4212‧‧‧ fifth surface

422‧‧‧ latch

423‧‧‧ Third carrier board

4231‧‧‧ sixth surface

4232‧‧‧ seventh surface

4233‧‧‧ first through slot

4234‧‧‧Second pass

4235‧‧‧ horizontal board

4236‧‧‧First fixing hole

4237‧‧‧ first scale

4238‧‧‧ Magnet

424‧‧‧First fixed block

4241‧‧‧ eighth surface

4242‧‧‧ ninth surface

4243‧‧‧ tenth surface

4244‧‧‧First shaft hole

425‧‧‧Second fixed block

4251‧‧‧ eleventh surface

4252‧‧‧ twelfth surface

4253‧‧‧Second shaft hole

426‧‧‧ third fixed block

427‧‧ pointer

428‧‧‧First drive shaft

4281‧‧‧ first end

4282‧‧‧second end

429‧‧‧Second drive shaft

4291‧‧‧ Third end

4292‧‧‧4th end

43‧‧‧Testing device

431‧‧‧Test box

432‧‧‧ card board

433‧‧‧clamp

44‧‧‧Support device

441‧‧‧fourth carrier board

4411‧‧‧13th surface

4412‧‧‧fourteenth surface

442‧‧‧ fifth carrier board

443‧‧‧Second holding trough

444‧‧‧First support plate

4441‧‧‧ fifteenth surface

4442‧‧‧16th surface

4443‧‧‧3rd shaft hole

4444‧‧‧3rd slot

4445‧‧‧second scale

445‧‧‧second support plate

4451‧‧‧Seventeenth surface

4452‧‧‧ Eighteenth surface

4453‧‧‧4th shaft hole

45‧‧‧ drive

451‧‧‧ drive

4511‧‧‧Drive shaft

4512‧‧‧Driver

452‧‧‧ protective shell

453‧‧‧First runner

454‧‧‧Second runner

455‧‧‧Belt Tensioner

456‧‧ ‧ Calibration rod

457‧‧‧ sensor

4571‧‧‧Sense block

1 is a perspective view of a camera module glare test machine.

2 is a schematic perspective view of a test fixture.

3 is an exploded perspective view of the test fixture shown in FIG. 2.

4 is an exploded perspective view showing the other direction of the test fixture shown in FIG. 2.

Hereinafter, a camera module glare testing machine provided by the present invention will be further described with reference to FIG. 1 to FIG. 4 and the embodiment.

Referring to FIG. 1 , a camera module glare test machine 100 includes a test light box 10 , a light source 20 , a black box 30 , and a test fixture 40 .

The test optical box 10 is a dark sealed light box. In the embodiment, the test light box 10 is generally in the shape of a rectangular parallelepiped. The test optical box 10 includes a top plate 11, a partition 12, a bottom plate 13, and a side door (not shown) perpendicular to the top plate 11 and the bottom plate 13. The spacer 12 includes a first surface 121. The top plate 11, the partition 12 and the bottom plate 13 are parallel to each other and the partition 12 divides the test light box 10 into two parts. A receiving groove (not shown) is formed on the bottom plate 13.

The light source 20 is formed on the top plate 11. In the embodiment, the light source 20 is an incandescent lamp.

The black box 30 is formed on the first surface 121 of the spacer 12. The black box 30 includes a second surface 31 parallel to the first surface 121, a third surface 32 parallel to the second surface 31, and A light passing hole 33 penetrating through the second surface 31 and the third surface 32. The third surface 32 is in contact with the first surface 121. The light passing hole 33 is opposite to the light source 20. Obviously, the partition plate 12 is also formed with a light-passing hole (not shown) corresponding to the light-passing hole 33. In this embodiment, the black box 30 has a rectangular parallelepiped shape.

Referring to FIG. 2 , the test fixture 40 includes a carrying device 41 , a rotating device 42 , a testing device 43 , a supporting device 44 , and a driving device 45 .

Referring to FIGS. 3 to 4 , the carrying device 41 includes an upper cover 411 and a first carrier 412 . The upper cover 411 is pivotally connected to the first carrier 412 . The upper cover 411 includes a lens hole 4111. The first receiving plate 412 includes a first receiving slot 4121. The first receiving slot 4121 is configured to receive a camera module (not shown). Opposite the lens hole 4111.

The rotating device 42 includes a second carrier 421, at least one latch 422, a third carrier 423, a first fixing block 424, a second fixing block 425, a third fixing block 426, a pointer 427, and a The first transmission shaft 428 and a second transmission shaft 429.

The second carrier plate 421 includes a fourth surface 4211 and a fifth surface 4212 parallel to the fourth surface 4211. The second carrier plate 421 is further formed with a fourth surface 4211 and A fixing hole (not shown) of the fifth surface 4212 is received in the fixing hole and is flush with the fifth surface 4212, and the other end protrudes from the fourth surface 4211. A blind hole (not shown) is further formed from the fifth surface 4212 toward the fourth surface 4211, and the center of the blind hole is opposite to the center of the lens hole 4111.

The third carrier plate 423 includes a sixth surface 4231 and a seventh surface 4232. The sixth surface 4231 is parallel to the seventh surface 4232, which is parallel to the fifth surface 4212. A first through slot 4233 and a second through slot 4234 extending through the sixth surface 4231 and the seventh surface 4232 are formed on the third carrier plate 423. The first through slot 4233 is adjacent to the second through slot 4234, and a portion of the third carrying plate 423 between the first through slot 4233 and the second through slot 4234 is defined as a horizontal plate 4235. A first fixing hole 4236 penetrating the sixth surface 4231 and the seventh surface 4232 is formed on the horizontal plate 4235. The first fixing hole 4236 and a blind hole formed from the fifth surface 4212 to the fourth surface 4211 are matched with a pin, and the second carrier plate 421 and the third carrier plate 423 are fixed together, the first fixing The hole 4236 shares a central axis with the lens hole 4111, and the second carrier plate 421 can rotate along the central axis of the lens hole 4111 and the first fixing hole 4236.

A first scale 4237 is formed on the sixth surface 4231. The first scale 4237 is a semicircle centered on the first fixing hole 4236, and the scale is +90°~0°~-90°. In this embodiment, the first scale 4237 surrounds the second through slot 4234. A plurality of uniformly distributed magnets 4238 are also formed on the inner side of the first scale 4237. A circle in which the plurality of magnets 4238 are located is concentric with a circle in which the first scale 4237 is located. In the present embodiment, five of the magnets 4238 are distributed inside the first scale 4237, and each of the two magnets 4238 is spaced apart by 45°. The magnet 4238 is configured to adsorb the pin 422, so that the second carrier plate 421 is fixed on the third carrier plate 423 after being rotated by a certain angle.

The first fixing block 424 is fixed to one end of the third carrier plate 423 and adjacent to the first through slot 4233. The first fixing block 424 is a type of rectangular parallelepiped thin block. The first fixing block 424 includes an eighth surface 4241, a ninth surface 4242 opposite to the eighth surface 4241, and a tenth surface 4243. The eighth surface 4241 is perpendicular to the sixth surface 4231 and adjacent to the first through groove 4233. The tenth surface 4243 is perpendicular to the ninth surface 4242 and away from the sixth surface 4231. A first shaft hole 4244 is formed from the ninth surface 4242 toward the eighth surface 4241.

The second fixing block 425 is fixed to the other end of the third carrier plate 423 and opposite to the position of the first fixing block 424. The second fixing block 425 includes a parallel to the eighth surface 4241 and The eleventh surface 4251 of the first scale 4237 and a twelfth surface 4252 opposite the eleventh surface 4251. A second shaft hole 4253 is formed from the twelfth surface 4252 toward the eleventh surface 4251.

The third fixing block 426 is fixed on the tenth surface 4243, the pointer 427 is fixed on the third fixing block 426, and the pointer 427 is perpendicular to the tenth surface 4243.

The first transmission shaft 428 includes a first end portion 4281 and a second end portion 4282 connected to the first end portion 4281. The diameter of the second end portion 4282 is smaller than the diameter of the first end portion 4281. The first end portion 4281 is received in the first shaft hole 4244, and the first end portion 4281 is fixed to the first fixing block 424.

The second transmission shaft 429 includes a third end portion 4291 and a fourth end portion 4292 connected to the third end portion 4291. The diameter of the fourth end portion 4292 is smaller than the diameter of the third end portion 4291. The third end portion 4291 is received in the second shaft hole 4253, and the third end portion 4291 is fixed to the second fixing block 425.

The test device 43 is used for testing and includes a test box 431, a card board 432 and four posts 433. The test box 431 is a square high-element test board for controlling the glare test of the camera module housed in the first receiving slot 4121. The card board 432 is a square thin plate, and the four card posts 433 are two One set is fixed to the two ends of the card board 432, and one end of each of the posts 433 is fixed on the card board 432, and the other end is fixed on the third board 423. The test box 431 is fixed between the card board 432, the post 433 and the third carrier board 423. The test box 431 is electrically connected to the camera module housed in the first receiving slot 4121, and connected to a computer storing a pre-designed test program via a USB data cable.

The support device 44 includes a fourth carrier plate 441, a fifth carrier plate 442, a first support plate 444, and a second support plate 445.

In this embodiment, the fourth carrier plate 441, the fifth carrier plate 442, the first support plate 444, and the second support plate 445 are all square thin plates.

The size of the fifth carrier plate 442 is smaller than the size of the fourth carrier plate 441. The fourth carrier plate 441 includes a thirteenth surface 4411 parallel to the sixth surface 4231 and a fourteenth surface 4412 opposite the thirteenth surface 4411. The fifth carrier plate 442 is fixed on the fourteenth surface 4412. The fifth carrier plate 442 is completely received in a receiving groove (not shown) formed on the bottom plate 13. Forming a second through the fifth carrier plate 442 from the thirteenth surface 4411 to the fifth carrier plate 442 Capacitor 443. The position of the second receiving groove 443 is opposite to the position of the test box 431, and is used for accommodating a portion of the test box 431 when the thickness of the test box 431 in the direction perpendicular to the thirteenth surface 4411 is large.

The first support plate 444 is fixed to one end of the thirteenth surface 4411. The first support plate 444 includes a fifteenth surface 4441 perpendicular to the thirteenth surface 4411 and a back surface opposite the fifteenth surface 4441. Sixteenth surface 4442. A third shaft hole 4443 and a third through groove 4444 are formed from the fifteenth surface 4441 to the sixteenth surface 4442, and the third shaft hole 4443 is configured to receive a portion of the second end of the first transmission shaft 428. The third through slot 4444 is located at a portion of the first support plate 444 that protrudes from the fourth carrier plate 441 and is adjacent to the fourth carrier plate 441. A second scale 4445 is further formed on the fifteenth surface 4441. The second scale 4445 is semicircularly surrounding the third shaft hole 4443. The scale of the second scale 4445 is +90°~0°~-90°.

The second support plate 445 is fixed to one end of the thirteenth surface 4411, and the second support plate 445 is opposite to the first support plate 444. The second support plate 445 includes a seventeenth surface 4451 opposite to the fifteenth surface 4441 and an eighteenth surface 4452 opposite the seventeenth surface 4451. A fourth shaft hole 4453 extending through the second support plate 445 is formed from the seventeenth surface 4451 to the eighteenth surface 4452. The fourth shaft hole 4453 is for receiving the fourth end of the second transmission shaft 429. Department 4292. The fourth shaft hole 4453 is opposite to the third shaft hole 4443.

The driving device 45 includes a driver 451, a protective casing 452, a first rotating wheel 453, a second rotating wheel 454, a belt tensioning wheel 455, a calibration rod 456, a sensor 457 and a set The first runner 453, the second runner 454, and the belt on the belt tensioner 455 (not shown).

The driver 451 includes a drive shaft 4511 and a drive body 4512 coupled to the drive shaft 4511. The drive shaft 4511 passes through the third through slot 4444 and is located in a space formed by the protective housing 452 and the first support plate 444 and the fourth carrier plate 441. The driving body 4512 is located on the fifteenth surface 4441 side of the first support plate 444 and its lower surface is flush with the fourteenth surface 4412.

The first rotating wheel 453 is sleeved on the driving shaft 4511. The second rotating wheel 454 is sleeved on the second end portion 4282 of the first transmission shaft 428. The belt tensioning pulley 455 is located at the first rotation. Between the wheel 453 and the second wheel 454, it is used to maintain proper belt tension, avoid belt slippage, compensate for belt wear and elongation caused by aging.

The calibration rod 456 is vertically fixed to the second rotor 454, and the inductor 457 is fixed on the sixteenth surface 4442. The sensor 457 includes two opposing sensing blocks 4571 that cooperate with the calibration rod 456 to detect whether the scale of the test fixture 40 is accurate.

The steps of the glare test machine 100 of the camera module provided by the present invention for testing glare are as follows:

In the first step, the test device is connected to the computer with the test program installed; in the second step, the light source 20 is turned on, and the second carrier plate 421 is rotated to a preset first test angle θ1, through the plug 422 and The magnet 4238 fixes the second carrier plate 421 to the third carrier plate 423. In the third step, a camera module of the same batch that needs to be tested for glare is placed in the first receiving slot 4121 of the carrier device 41. The fourth step is to close the side door of the test light box 10 (not shown), and the test program is started to perform a glare test on the camera module. Specifically, the driving device 45 drives the rotating device 42. Rotating to a predetermined number of second test angles α1, α2, α3, ..., αn (n = 1, 2, 3, ...), the test box controls the camera module in each of the second The image is captured by the test angle, and according to the image captured in the third step, it is judged whether the camera module has a glare and a glare position; in the fifth step, if the camera module has glare, the glare is recorded. The first test angle θ1 where the second carrier plate 421 is located when the second carrier plate 421 is present And the first test angle θ1 of the second carrier board 421 in the presence of glare, and the other camera modules to be tested in the same batch as the camera module are placed in the first receiving slot 4121 of the carrying device 41, And starting the test program to perform glare test on the other camera modules to be tested; in the sixth step, if the camera module does not have glare, the second carrier plate is rotated to another predetermined first test angle, and then repeated The step of performing a glare test on the camera module. Rotating the second carrier plate 421 to a predetermined one of the predetermined first test angles θ2, θ3, . . . , θn (n=1, 2, 3, . . . ), and repeating the camera module. The steps of the glare test.

In this embodiment, the first test angle includes 0°, +45°, -45°, +90°, -90°.

In this embodiment, the first test angle is used to adjust the orientation of the lens of the camera module, and the second test angle is used to adjust the angle between the light source 20 and the lens of the camera module.

The camera module glare test machine 100 provided by the invention has the following advantages: 1) using the driver 451 to control the test fixture 40 to automatically adjust the angle, the test accuracy can be accurate to 0.1 degrees and the rotation speed of the driver 451 can be freely controlled, and the test accuracy is high. 2) The whole test system is integrated into the test light box 10, which can eliminate the influence of external reflected stray light on the test system, and is not affected by the outside world; 3) The entire test process test image capture only takes 5s , testing faster and saves time; 4) Only one operator is required to complete the entire test operation, saving effort; 5) placing a black box 30 with a light hole in the test light box 10, which is advantageous for vertical illumination of the light source; 6) adding a test image function for continuously capturing a specific range of angles, Meet different test requirements; 7) Fixed test fixture 40 at 40 degrees, +45 degrees, -45 degrees, -90 degrees, providing horizontal, vertical, and two oblique 45 degree glare tests for the camera. wide range.

It is to be understood that the above embodiments are merely illustrative of the invention and are not intended to limit the invention. It is to be understood by those skilled in the art that various other changes and modifications may be made without departing from the scope of the invention.

Claims (10)

A camera module glare testing machine includes: a test light box; a light source disposed in the test light box; a black box disposed in the test light box, the light box is formed with a light passing hole; a test fixture disposed in the test optical box, the test fixture includes: a carrying device, a rotating device, a testing device, a supporting device and a driving device; the carrying device is configured to receive the camera module, The camera module is configured to capture a glare test image; the light source, the light passing hole and the lens of the camera module are oppositely positioned such that light emitted by the light source is vertically irradiated to the lens through the light passing hole; the rotation The device includes a second carrier board and a third carrier board fixed to the second carrier board. The carrier device is fixed on the second carrier board, and the second carrier board can surround the center of the lens of the camera module. The shaft is fixed to the third carrier plate after being rotated by a specific angle with respect to the third carrier board; the testing device is configured to control the camera module to perform glare image capture; the third carrier board and the driving device are both fixed Supporting device The third drive means for driving the rotation of the carrier plate. The camera module glare test machine of claim 1, wherein the carrier device comprises an upper cover plate and a first carrier plate, the upper cover plate being pivotally connected to the first carrier plate, wherein the upper cover plate is pivotally connected to the first carrier plate The cover plate includes a lens hole. The first receiving frame includes a first receiving slot for receiving the camera module. The lens of the camera module is opposite to the lens hole. The camera module glare test machine of claim 1, wherein the support device comprises a fourth carrier plate, a first support plate and a second support plate; the first support plate is fixed at the first One end of the four supporting plate is fixed to the other end of the fourth supporting plate and opposite to the first supporting plate. The camera module glare test machine of claim 3, wherein the rotating device further comprises at least one latch, a first drive shaft and a second drive shaft, the latch being fixed on the second carrier plate The rotating device is respectively fixed on the first supporting plate and the second supporting plate through the first transmission shaft and the second transmission shaft, and the third carrier plate is further formed with a plurality of arc-shaped uniformly distributed a magnet, the plurality of magnets are used for adsorbing the plug, and the second carrier plate is fixed to the third carrier plate after being rotated by a certain angle. The camera module glare test machine of claim 1, wherein the test device comprises a test box, a card board and four card posts, the test box is fixed on the card board, the card post and the In the space formed by the third carrier board, the test box is electrically connected to the camera module and connected to a computer storing the test program. The camera module glare test machine of claim 4, wherein the driving device comprises a driver, a first wheel, a second wheel, a belt tensioner and a set of a second rotating wheel of the rotating wheel and a belt on the belt tensioning wheel, the driving device comprises a driving shaft, the first rotating wheel is sleeved on the driving shaft of the driver, and the second rotating wheel is sleeved on the first transmission On the shaft, the belt tensioning wheel is located between the first rotating wheel and the second rotating wheel for maintaining proper belt tension, avoiding belt slippage, compensating for belt wear and elongation caused by aging. A method for performing a glare test using the camera module glare test machine of any one of claims 1 to 6, comprising the steps of: connecting the test device to a computer on which the test program is installed; turning on the light source, and The second carrier board is rotated to a preset first test angle; the camera module that needs to test the glare is placed in the carrier device; and the test program is started to perform glare test on the camera module, specifically: the driving device drives The rotating device is sequentially rotated to a predetermined number of second test angles, and the test box controls the camera module to perform image capture at each second test angle; according to the image captured by the camera module, Determine whether the camera module has glare. The method of glare testing of claim 7, further comprising the step of: if the camera module has glare, recording a first test angle of the second carrier when the glare occurs, and fixing the second carrier In the first test angle when the glare occurs, the other test camera modules of the same batch as the camera module are placed in the carrying device, and the test program is started to perform glare test on the other camera modules to be tested. The method of glare testing according to claim 7, wherein if the camera module does not have glare, the second carrier is rotated to another predetermined first test angle, and the camera mode is repeated. The group performs the steps of the glare test. The method of glare testing of claim 7, wherein the first test angle comprises 0°, +45°, -45°, +90°, -90°.