CN101738305A - Detection picture for detection device of camera module - Google Patents
Detection picture for detection device of camera module Download PDFInfo
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- CN101738305A CN101738305A CN200810180835A CN200810180835A CN101738305A CN 101738305 A CN101738305 A CN 101738305A CN 200810180835 A CN200810180835 A CN 200810180835A CN 200810180835 A CN200810180835 A CN 200810180835A CN 101738305 A CN101738305 A CN 101738305A
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Abstract
The invention relates to a detection picture for a detection device of a camera module. MTF detection and resolution detection are executed simultaneously by detection patterns formed by a plurality of detection lines, so that the detection time of the camera module can be reduced substantially.
Description
Technical field
The present invention relates to the detection figure of camera module detecting device, relate more specifically to carry out simultaneously the detection figure of the camera module detecting device that MTF mode and resolution detects.
Background technology
Portable terminal such as mobile phone, PDA is except that original function, and the additional functions such as film, shooting of viewing and admiring of increase are integrated gradually, and the most representative as the camera module (CAMERA MODULE) of one of many products in the integrated process.
Described camera module not only resolution gradually becomes high pixel, but also has increased automatic focusing (AF), optical zoom additional functions such as (OPTICAL ZOOM).
In general, camera module (CCM:COMPACTCAMERA MOUDULE) moulding that is arranged on portable terminal is little, and is critical part with imageing sensors such as CCD or COMS.Wherein, described camera module is by imageing sensor, the image of object carried out light harvesting, and be stored on the storer with data mode, and stored data show in the image mode by the display part of this portable terminal
And common camera module is made with COB (CHIP ON BOARD), COF modes such as (CHIPON FLEXIBLE).
Wherein, described camera module is fixing in the distance back of regulating between camera lens and the imageing sensor, thereby carries out the focus adjustment.
And, after described camera module is adjusted focal length, the camera module of tester after with described adjustment focal length is arranged on the pick-up unit, and the mode (Resolution test) by detection resolution detects its resolution, and judges whether described camera module is bad.
But, exist in the prior art camera module carried out the device of focus adjustment and judges bad proving installation for being provided with respectively, thus need the staff will adjust camera module after the focus move to proving installation and be provided with after just finished the problem of camera module being judged bad preliminary work.
So exist to need move in the prior art described adjusted focus camera module during, camera module is arranged on time of proving installation etc., therefore reduced the problem of throughput rate.
In addition, because MTF detects and the resolution detection is carried out respectively, therefore need possess the figure that is used to detect separately in the prior art.
Summary of the invention
The object of the invention provides the detection figure of the camera module detecting device that can carry out MTF mode and resolution detection simultaneously.
The invention provides the detection figure that is used for camera module detecting device, comprise: former dot pattern, include with described former dot pattern and be as the criterion with the center test section of decided to isolate the at interval check pattern that is provided with, the peripheral former dot pattern that is provided with at the periphery of described center test section, include with described former dot pattern and be as the criterion, and comprise having a part in the described check pattern at least for detection resolution with detect MTF and a plurality of detection lines that the thickness that forms and isolation distance are kept institute's fixed-ratio with decided to isolate the at interval peripheral test section of the peripheral check pattern that is provided with.
Wherein, described check pattern comprises: described a plurality of detection lines are as the criterion with described initial point and are as the criterion towards the vertical detection pattern of horizontal direction setting with described initial point towards the vertically disposed horizontal detection pattern of direction and described a plurality of detection line; In described vertical detection pattern or the described horizontal detection pattern, a part is set the pattern that is used to detect MTF for according to the focal length of camera module.
And, also comprise: isolate the critical pattern that is provided with described former dot pattern with institute's set a distance, set the zone of described center test section by described critical pattern.
And described peripheral test section is arranged on the corner portions located of described detection figure.Described peripheral test section comprises: peripheral former dot pattern is arranged on the periphery of the former dot pattern in described periphery and carries out the peripheral check pattern that resolution detects and be used to confirm the critical pattern of the critical zone of described peripheral test section.
The detection figure that is used for camera module detecting device of the present invention can carry out MTF detection and resolution detection simultaneously by the check pattern that is made of a plurality of detection lines, therefore can significantly reduce the detection time of camera module.
And a part is applied to detect the pattern of MTF in the check pattern of the present invention, therefore carries out the algorithm that MTF detects and resolution detects and simplifies, and can shorten the detection time of camera module by this.
And carry out the pattern that MTF detects and resolution detects in the present invention and be integrated in the check pattern, so significantly dwindle the area of detection figure, and guarantee the space of having more than needed.
Description of drawings
Fig. 1 is the schematic perspective view of the camera module of first embodiment of the invention.
Fig. 2 is the sectional view of camera module shown in Figure 1.
Fig. 3 is the synoptic diagram of the camera module detecting device of first embodiment of the invention.
Fig. 4 is the schematic internal view of camera module detecting device shown in Figure 3.
Fig. 5 is the synoptic diagram of oriented module shown in Figure 4.
Fig. 6 is the synoptic diagram of detection module shown in Figure 3.
Fig. 7 is the preceding synoptic diagram of module assembly fixture 160 work shown in Figure 6.
Fig. 8 is the synoptic diagram after the module assembly fixture work shown in Figure 7.
Fig. 9 is the synoptic diagram of the sensor of Fig. 6.
Figure 10 is a focusing unit floor map shown in Figure 6.
Figure 11 is another synoptic diagram of state after the detection module work of Fig. 6.
Figure 12 is the synoptic diagram after the work of Characteristics Detection unit shown in Figure 6.
Figure 13 is the detection method sequential schematic of the camera module detecting device of first embodiment of the invention.
Figure 14 a is the input image synoptic diagram of first embodiment of the invention.
Figure 14 b is the image output synoptic diagram of Figure 14 a.
Figure 15 is the curve map of signal mtf value in the present embodiment.
Figure 16 is the front schematic view of the detection figure that is used to detect camera in the embodiment of the invention.
Figure 17 is the detection figure front schematic view of another embodiment of the present invention.
Description of reference numerals
10: camera module 11: camera lens
12: main body 13: cabinet
14: printed circuit board (PCB) 15: imageing sensor
16: tusk 100: camera module detecting device
110: cabin 120: light source module
130: oriented module 140: operating portion
150: detection module 160: the module assembly fixture
162: base 164: assembly fixture
170: top board 180: anchor clamps
190: focusing unit 200: Characteristics Detection unit
300: detect Figure 30 2: the center test section
304: peripheral test section 310: former dot pattern
320: check pattern 322: detection line
324: horizontal detection pattern 326: the vertical detection pattern
330: critical pattern
Embodiment
Fig. 1 is the schematic perspective view of the camera module of first embodiment of the invention, and Fig. 2 is the sectional view of camera module shown in Figure 1.
As Fig. 1, shown in 2, the camera module 10 of present embodiment comprises: inner peripheral surface is formed with the cabinet 13 of box thread 13a, the printed circuit board (PCB) 14 that is provided with at the downside of described cabinet 13, the main body 12 that outer peripheral face is formed with male thread 12a and combines with described cabinet 13, the camera lens 11 that on described main body 12, is provided with, be arranged between described printed circuit board (PCB) 14 and the described main body 12 and induction through the imageing sensor 15 of the image of described camera lens 11.
Described main body 12 is assembled by the screw combination of cabinet 13, described main body 12 in a clockwise direction or rotation counterclockwise regulating the distance between described camera lens 11 and the described imageing sensor 15, the distance adjustment by described camera lens 11 and described imageing sensor 15 is to adjust the focus of camera module 10.
And,, between described imageing sensor 15 and described camera lens 11, wave filter 17 is set in order to prevent the input of the frequency that described imageing sensor 15 can't detect.
Especially, be formed with tusk 16, can more easily rotate described main body 12 by described tusk 16 at the outer peripheral face of described main body 12.
Fig. 3 is the synoptic diagram of the camera module detecting device of first embodiment of the invention, and Fig. 4 is the schematic internal view of camera module detecting device shown in Figure 3, and Fig. 5 is the synoptic diagram of oriented module shown in Figure 4.
Extremely shown in Figure 5 as Fig. 3, the camera module detecting device 100 of present embodiment comprises: cabin 110, be arranged in the described cabin 110 and luminous light source module 120, be arranged on the detection module 150 that is used to be provided with described camera module 10 in the described cabin 110, be arranged on and be used to guide the moving direction of described light source module 120 and the oriented module 130. of displacement in the described cabin 110
Described cabin 110 blocking-up external light sources and the amount of the light source that offers described detection module 150 carried out all and provide.
Described light source module 120 comprises: according to the led light source 122 of the galvanoluminescence that allows, be used for fixing the framework 124 of described led light source 122 and be arranged on figure (not shown) on the described led light source 122.Focus adjustment and resolution that described figure is used for described camera module 10 detect, and are arranged on the downside of described led light source 122.
Wherein, the inscape of described led light source 122 is known technology for those skilled in the art, does not therefore carry out auspicious stating.
Described oriented module 130 comprises: the guided way 132 that combines with the framework 124 of described light source module 120 combines with described cabin 110 and with the fixed rail 134 of described guided way 132 toe joints be arranged on the one-sided of described guided way 132 and be used to transfer the guiding operating rod 135 of described guided way 132.
Wherein, described guided way 132 up/following direction setting, make described framework 124 up/following direction moves, and be arranged on more than 124 position of described framework, and 4 corner portions located of the framework 124 that constitutes with 4 angular shape shown in being arranged in the present embodiment, can keep under the prerequisite of level of described light source module 120 on/move down.
And, described fixed rail 134 and described guided way 132 are with ball-screw (ball screw) shape toe joint, the outer peripheral face of described guided way 132 is formed with spiral-shaped tusk 132a, and described fixed rail 134 inside are provided with the ball (not shown) with described guided way 132 toe joints.
In addition, described guided way 132 according to the rotation of described guiding operating rod 135 up/following direction straight line moves, the formed pitch decision of described spiral-shaped tusk 132a up/distance that following direction straight line is transferred, therefore can control the handover distance more accurately.
Fig. 6 is the synoptic diagram of detection module shown in Figure 3, Fig. 7 is the preceding synoptic diagram of module assembly fixture (160) work of Fig. 6, Fig. 8 is the synoptic diagram after the module assembly fixture work shown in Figure 7, Fig. 9 is the synoptic diagram of the sensor of Fig. 6, Figure 10 is a focusing unit floor map shown in Figure 6, Figure 11 is another synoptic diagram of state after the detection module work of Fig. 6, and Figure 12 is the synoptic diagram after the work of Characteristics Detection unit shown in Figure 6.
Extremely shown in Figure 11 as Fig. 6, the detection module 150 of present embodiment comprises: the module assembly fixture 160 that is used to be provided with described camera module 10, be arranged at described module assembly fixture 160 and be used to detect the top board (head board) 170 of described camera module 10, being arranged on the upside of the described module assembly fixture 160 that is used to be provided with described camera module 10 and by up/following direction moves the anchor clamps 180 with fixing described camera module 10, be arranged on the upside of described anchor clamps 180 and the focusing unit 190 that combines with the main body 12 of described camera module 10, be arranged on the Characteristics Detection unit 200 that between described camera module 10 and described focusing unit 190, moves and as required of described module assembly fixture nearby.
Described module assembly fixture 160 comprises: base 162, be used to be provided with the assembly fixture 164 of described camera module 10, and described assembly fixture 164 is carried out the front/rear travel mechanism that moves 165.
Described base 162 is fixed in described cabin 110, described assembly fixture 164 can be done the straight line back and forth movement to described focusing unit 190 sides by described travel mechanism, described in the present embodiment travel mechanism 165 has adopted pneumatic cylinder, but also can adopt the transfer device of other kinds that are different from present embodiment.Wherein said assembly fixture 164 moves towards the rear straight line that is provided with described focusing unit 190 according to described pneumatic cylinder.
The position of described assembly fixture 164 is by the induction of feeler or optical sensor, if when the position that described assembly fixture 164 is moved is not positive position, after control part is responded to it initial position arrived in described assembly fixture 164 involutions.Especially, when described assembly fixture 164 does not move to positive position, inform the tester by light flash or buzzer (buzzer).
Described anchor clamps 180 are arranged between described focusing unit 190 and the described assembly fixture 164 and are used for fixing the described camera module 10 that is arranged on the described assembly fixture 164, it comprises: intermediate plate 182, anchor clamps guide rod 184 to described intermediate plate more than 182/following direction is fixed is used for/descend to move the travel mechanism 186 of described intermediate plate 182.
Described intermediate plate 182 is provided with anchor clamps hole 185, and described anchor clamps hole 185 is arranged on the upside of the described camera module 10 that rearward moves.That is, when described camera module 10 is moved to described focusing unit 190 sides by described assembly fixture 164,, formed anchor clamps hole 185 for the light that described light source module 120 is produced is sent to described camera module 10.In addition, described focusing unit 190 also is formed with the focal length hole 195 that is used for by the light that produces from described light source module 120.
Described focusing unit 190 comprises: the focal length thin slice 192 that is formed with described focal length hole 195, guide the guide rod 193 of the moving direction of described focal length thin slice 192, up/following direction moves the travel mechanism 196 of described focal length thin slice 192, respond to the sensor 197 of the position of described focal length thin slice 192, be arranged on the plectane 199 on the described focal length thin slice 192, connecting pin 198 that is arranged on the described plectane 199 and combines and the rotating mechanism (not shown) that is used to rotate described plectane 199 with tusk 16 on being formed on described camera module 10.
Described focal length thin slice 192 according to described travel mechanism 196 up/following direction straight line back and forth movement, travel mechanism described in the present embodiment 196 comprises: be fixed in the stepper motor 196a of upper frame 166 and the screw rod 196b that is rotated by described stepper motor, described screw rod 196b and described intermediate plate 182 toe joints and removable.
Wherein, the revolving force that described stepper motor 196a produces rotates described screw rod 196b, be formed on box thread (not shown) on the described intermediate plate 182 and the male thread of described screw rod 196b this moment and form toe joint, and with described intermediate plate 182 to upside or downward side shifting.
Especially, described intermediate plate 182 is connected by described guide rod 193, when on the described intermediate plate 182/following when mobile, the horizontal direction that described guide rod 193 suppresses described intermediate plate 182 moves, and guide described intermediate plate 182 upwards/down mobile, make that described camera module 10 and described connecting pin 198 are approaching.
And, described sensor 197 is arranged on the described anchor clamps guide rod 184, with upper limit position or the lower position of responding to described intermediate plate 182, in the present embodiment by responding to the upper limit position of described intermediate plate 182, minimizing the spacing between described intermediate plate 182 and the described assembly fixture 164, is minor increment with the displacement of keeping described intermediate plate 182.
And during the downward side shifting of described intermediate plate 182, described connecting pin 198 combines with the tusk 16 of described main body 12, and the power rotation that described plectane 199 produces according to described rotating mechanism is also rotated described main body 12.
Wherein, described rotating mechanism can be various ways, though and not shown in the present embodiment, can also comprise the stepper motor that is arranged on the described intermediate plate 182, belt or the chain that connects the axle of described plectane 199 and described stepper motor.
Described Characteristics Detection unit 200 optionally work with the foreign substances that detects described camera module 10 and be arranged on described module assembly fixture 160 near, it comprises: be fixed on the pillar 202 on the described base 162, the pivot arm 204 that is arranged on the described pillar 202 and between described assembly fixture 164 and described focusing unit 190, moves, be arranged on the described pivot arm 204 and produce the light source (not shown) of the light that is used for Characteristics Detection and be arranged on the pillar 202 and with fixed angle rotate the rotating mechanism 206 of described pivot arm 204.
Wherein, described Characteristics Detection unit 200 offers described camera module 10 with the light that described light source produces, and is penetrated into the dust or the foreign substances of the inside of described camera module 10 with detection.Though not shown, described in the present embodiment light source is a led light source.
And, described rotating mechanism 206 be used for described pivot arm 204 with fixed angle be rotated, it can be stepper motor or pneumatic/hydraulic cylinder.
On the one hand, in the present embodiment, the operating portion 140 that is provided for controlling at the downside of described base 162, described operating portion 140 is provided with electric field part (not shown), described operating portion 140 can be carried out the detection of described camera module 10 by automatic or manual, and also is provided with automatic detection or manual test button 142/144 for this reason.
And described detection module 150 is connected with the numerical evaluation device with picture display device (for example display) (for example computing machine), and the picture of importing to described camera module 10 shows on described picture display device.
Figure 13 is the detection method sequential schematic of the camera module detecting device of first embodiment of the invention.
Extremely shown in Figure 13 as Fig. 6, comprise: the tester is arranged on step s10 on the described assembly fixture 164 with camera module 10, the step s20 that the module assembly fixture 160 of described camera module 10 moves to the detection position is set, the step s30 that the described camera module 10 that is moved by anchor clamps 180 is fixed, step s40 to the last side shifting focusing unit 190 of described anchor clamps 180, respond to the bad step s50 of work of described camera module 10, if judging described camera module 10 does not have when bad, regulate the step s60 of the focus of described camera module 10, regulate the step s70 that detects the resolution of described camera module 10 after the focus of described camera module 10, detect the step s80 of the characteristic of described camera module 10.
Wherein, the step that detects described camera module 10 comprises: for the detection of described camera module 10 is provided with step s10, s20, s30, the s40 of detection module 150, and step s50, s60, s70, s80 that the camera module 10 that is arranged on the described detection module 150 is carried out focus adjustment and bad detection.
In the process that described camera module 10 is set, the tester is arranged on described camera module 10 on the described assembly fixture 164, and the camera module 10 that is arranged on the described assembly fixture 164 moves to the rear that is provided with focusing unit 190.
And, the control part that is arranged on described operating portion 140 is after the positive position of the described assembly fixture 164 of induction, the downward described anchor clamps 180 of side shifting, with fixing described camera module 10, after camera module 10 is fixed by described anchor clamps 180, described focusing unit 190 downward side shiftings are arranged on the connecting pin 198 on the described focusing unit 190 and the tusk 16 of described camera module 10 main bodys 12 and mutually combine, thereby finish the focus adjustment of described camera module 10 and the preparation of detection.
Wherein, the light that produces from the light source modules 120 that are arranged in the described cabin 110 sees through the camera lens 11 of described camera module 10 by being arranged on the figure on the described light source module 120, the focal length hole 195 of described plectane 199 and the anchor clamps hole 185 of intermediate plate 182.
Wherein, described figure be provided with simultaneously with after the focal adjustments of the MTF mode chatted with pattern be used for the pattern of detection resolution.
And, when if described assembly fixture 164, described intermediate plate 182 and described focal length thin slice 192 can not move to positive position, after the described control part induction, described assembly fixture 164, described intermediate plate 182 and described focal length thin slice 192 are restored respectively to original position, and attempt again it is moved to positive position.
Then, for the work of judging camera module 10 whether, provide electric current by described top board 170 to described camera module 10, and the work of judging described camera module 10 according to the described electric current that provides whether, and described control part is realized the short-circuit detecting or the burn out detection of described camera module 10 by the electric current of importing to described camera module 10, and judges its bad s50.
Wherein, described control part will input to the signal of described camera module 10 through after the processing of described numerical evaluation device, and image is presented at described picture display part.
Then, described control part is rotatably provided in the described connecting pin 198 on the described focusing unit 190, regulating the distance between described camera lens 11 and the described imageing sensor 15, and realizes focal adjustments.Wherein, the image that sees through described camera lens 11 inputs in the described imageing sensor 15, and described control part generates the image that captures by the image that inputs to described imageing sensor 15.
Wherein, described control part is judged the described image that captures by MTF (Modulation Transfer Funcion) method, and regulates focal length between described camera lens 11 and the described imageing sensor 15 with this.
Described MTF in the forming process, has estimating of how many distortion to the spatial frequency of being imported through camera lens at a certain original image on film or imageing sensor.
Figure 14 a is the input image synoptic diagram of first embodiment of the invention, and Figure 14 b is the image output synoptic diagram of Figure 14 a, and Figure 15 is the curve map of signal mtf value in the present embodiment.
As Figure 14 a, shown in the 14b, the image shown in Figure 14 a by as described in imageing sensor 15 when being transfused to, can obtain the image output of the image shown in Figure 14 b, this is lower with resolution and contrast that the original signal based on the input image is compared its image.
At this moment, in the original image of input, with the brightest part, promptly maximum light leak amount is defined as Emax, and minimum light leak amount is defined as Emin; In the image of output, maximum light leak amount is defined as Dmax, minimum light leak amount is defined as Dmin.
The contrast of the spatial frequency of input is Ri=(Emax-Emin)/(Emax+Emin),
The contrast of the spatial frequency of output is Ro=(Dmax-Dmin)/(Dmax+Dmin).
Wherein, MTF=Ro/Ri, described mtf value is the value that the ratio of contrast was imported/gone out in expression, and its maximal value is 1, and minimum value is 0.And according to circumstances also can represent with %.Especially, described mtf value is more near 1, and then the agility of contrast (sharpness) is high more; Near 0, then low more more.
Especially, according to the theory of Nyquist, the frequency of input signal is half of nyquist limit of input arrangement, then can hold all described input signals, if during than the higher frequency of this frequency, then described input arrangement can not hold all input signals.
So, compare described input signal and be black and white situation, when the frequency of described input signal is high, in described input media, be deformed into dark grey and bright grey and generation input aliasing (Aliasing) phenomenon, and according to More (Moire) phenomenon or maze (Maze) phenomenon of described aliasing appearance as the ripples line.
Wherein, described control part calculates described mtf value, when described mtf value is higher than institute's definite value (for example 90%), then can be judged as and finish the focus adjustment; Perhaps can be by the focus of relatively regulating described camera module 10, as s60 through the mode of the Moire fringe of adjusted described image that captures of overfocus and storage.
And, during the focus of described adjustment camera module 10, the focal length that described control part promptly moves to described camera lens 11 setting nearby after, move described camera lens 11 by little between the focal area nearby and adjust the time to shorten focus.
Wherein, have in the pattern of figure in certain frequency broadband, in order to catch focus, described main body 12 is rotated, then can obtain the data of curve map as described in Figure 15, the certain field in the maximum mtf value of described curve map is set at pinpointed focus.
Especially, though the focus through described process setting is the pinpointed focus of camera module 10, can not know resolution or resolution performance, for it is confirmed, the resolution of chatting after needing to implement detects, to confirm which field is high-frequency can decompose.
Then, described control part will be finished the camera module 10 that described focus is adjusted, and directly it be implemented resolution and detect under the state that is set up.
Wherein, resolution detects and is called Resolution TEST or TV BON test, and (lp is Line Pair per mili meter to be formed with polytype lp/mm; Be illustrated in the number of the line in the 1mm, be also referred to as spatial frequency, 1lp/mm represents in the space of 1mm the black line of a 0.5mm and the white line of 0.5mm are arranged respectively) figure be the differentiation degree of detection line.For example carry out thickness between 100 pounds to 1600 pounds and change, after forming figure, pass through described camera module 10 filmed images.This moment occurs each line and get together and produce the zone of moore phenomenon, and the ultimate resolution of camera module 10 will just not take place to be judged as till More's the point in described control part.
Wherein, after described control part read in described figure and is used for image that resolution detects, spatial frequency by relatively inputing to described imageing sensor 15 and setting data value were to distinguish described decomposable line and More.
Then, if when detecting the resolution that obtains greater than the resolution set by described resolution, described control part judges that the camera module 10 of described adjusted focus is " PASS ", then is judged as if not " FAIL ", as s70.
Then, to the camera module 10 that detects by described resolution, described control part carries out foreign substances and detects, and described control part rotates to described Characteristics Detection unit 200 for the detection of described foreign substances the upside of described camera module 10.
Wherein, before 200 rotations of described Characteristics Detection unit, described focusing unit 190 rises to initial position, and after described focusing unit 190 moved, after 200 rotations of described Characteristics Detection unit were moved, inner light source was opened and provided light to described camera module 10.
Then, the light that is provided by described Characteristics Detection unit 200 is provided for described control part, to detect described imageing sensor 15 or whether described camera module 10 has foreign substances.200 light that produce are not provided with the figure of light source module 120 as described in described Characteristics Detection unit, provide white light when therefore opening light source, therefore do not provide light with outside blocking-up when closing light source.
Therefore, be unlocked and the light time is provided at described light source, described control part is confirmed the frequency responded in each pixel of described imageing sensor 15, to detect the size of stain and described stain pixel.The size of described stain is judged as during greater than setting value bad greater than the size of described setting value or described stain pixel.
In addition, redness or the blue dot of frequency by confirming in described each pixel, to respond to detect non-white point.The size of described red point or blue dot or frequency also are judged as during greater than setting value bad.
Then, when closing described light source, the frequency that inputs to described imageing sensor 15 by induction to be detecting the white point in each pixel, promptly non-stain, number and size.If white point size that detects or number during greater than setting value, then are judged as bad.The size of red point or blue dot or number also are judged as bad during greater than setting value.As mentioned above, in the present embodiment,, implement Characteristics Detection and foreign matter and detect, as s80 by briliancy based on Characteristics Detection unit 200.
On the one hand, be provided with bonding agent or fixed part at the main body 12 and the described cabinet 13 of described camera module 10, to prevent the rotation of described main body 12.Described main body 12 fixing is after described focus adjustment, described resolution when carrying out in detecting after back or the described Characteristics Detection be all harmless.
Then, when finishing described Characteristics Detection, described module assembly fixture 160 moves horizontally to the place ahead of tester position, and the tester can separate the camera module 10 that has detected/move from described module assembly fixture 160.
On the one hand, though described control part automatically performs described each step, but the tester can monitor that by described picture display part the focus adjustment, resolution of described camera module 10 detect, Characteristics Detection, and can extract because of wrong and be judged as qualified camera module with bad.
In addition, even in the process that described camera module 10 is detected automatically, the tester still can intervene testing process and remove bad camera module immediately by described operating portion 140.
Figure 16 is the front schematic view of the detection figure that is used to detect camera in the embodiment of the invention.
As shown in figure 16, detection Figure 30 0 of present embodiment comprises: camera module 10 is carried out the center test section 302 that focus adjustment and resolution detect, detect the peripheral test section 304 of the peripheral video picture of camera module 10 with described center test section being used to of forming in addition.
Described center test section 302 comprises: at the former dot pattern 310 of core setting, the periphery setting of described former dot pattern 310 and can carry out the check pattern 320 of MTF and TV BON test simultaneously and set the critical pattern 330 of the critical value of described center test section 302.
Wherein, described former dot pattern 310 is+word shape that described control part is discerned the former dot pattern 310 of described+word shape near the center of described detection Figure 30 0, be used for the surveyed area of the described center test section 302 of focus adjustment and TVBON test with setting.
Described check pattern 320 is used for carrying out simultaneously detecting based on the focus adjustment of described MTF mode and based on the resolution of TV BON mode, the vertical detection pattern 326 that horizontal detection pattern 324 that has comprised the thickness of keeping a plurality of detection lines 322 and certain interval ratio and arranged towards vertical direction and the thickness of keeping a plurality of detection lines 322 and certain interval ratio are arranged towards horizontal direction.
Described horizontal detection pattern 324 is made of a plurality of detection lines 322, the thickness of described each detection line 322 is as the criterion with described former dot pattern 310, more away from then with institute's fixed-ratio thickening, the spacing distance between described each detection line 322 also increases ratio with described thickness and increases.So it is 310 of the approaching more former dot patterns of described horizontal detection pattern 324 are close more, thin more away from 310 of described former dot patterns more.
Especially, described horizontal detection pattern 324 is as the criterion with described former dot pattern 310 and arranges towards vertical direction.
And the formation of described vertical detection pattern 326 is identical with the formation of described horizontal detection pattern 324, is as the criterion with described initial point and arranges towards horizontal direction.
Especially, the pattern of horizontal detection described in the present embodiment 324 is arranged on the upside of described former dot pattern 310, and described vertical detection pattern 326 is arranged on the left side of described former dot pattern 310, and described critical pattern 330 is arranged on the right side of described former dot pattern 310.
Described critical pattern 330 is used to set the zone of described center test section 302, and the position that can move described former dot pattern 310 according to camera module 10.
And the side of described horizontal detection pattern 324 or described vertical detection pattern 326 can indicate the numerical value or the degree value of display resolution, and this can be so that the tester confirms resolution by seeing that described resolution indicates.
Described peripheral test section 304 is distinguished mutually with described center test section 302, and is arranged on described detection Figure 30 0, and is arranged on four corner portions located of described detection Figure 30 0 in the present embodiment.
Wherein, described peripheral test section 304 is different with described center test section 302, is used to receive the mapping signal of the sidepiece of described camera module 10, and judges the image of input, detects with Tilt and the periphery of judging the input image.
That is,, when judgement is distorted by the spatial frequency of the sidepiece input of camera lens, can judge the bad of camera module 10 even the spatial frequency that inputs to described center test section 302 is for normal.
Wherein, the formation of peripheral test section 304 is identical with the formation of described center test section 302, comprise: be arranged near the optimum position of described detection Figure 30 0 and be used to detect the peripheral former dot pattern 360 of distortion, be arranged on the periphery of the former dot pattern 360 in described periphery and carry out peripheral check pattern 370 that TV BON detects and for detecting the critical pattern 330 that is used to confirm the critical zone of Figure 30 0.
So the peripheral test section 304 that is arranged on each corner of described detection Figure 30 0 passes through the spatial frequency of relatively input and the spatial frequency of storage, detect to realize resolution.
Especially, when the deviation between the resolution of the test section of center described in the present embodiment 302 and the resolution of described peripheral test section 304 was higher than institute's definite value, described control part was considered as camera module 10 bad equally.
And the situation of described critical pattern 330 is not imported normal spatial frequency, and when importing the spatial frequency of skew shape, described control part is considered as described camera module 10 bad.
On the one hand, detection Figure 30 0 of present embodiment utilizes the check pattern 320 that is made of a plurality of detection lines 322 to replace being used for the extra pattern that MTF detects, and detects to carry out described MTF.
That is, 350 is in the present embodiment in the Reference numeral, detects the zone of setting as being used for MTF, gets a part in the described horizontal detection pattern 324, is applied to the MTF pattern 350 that MTF detects that is used for shown in Figure 14 a.
Wherein, in described horizontal detection pattern 324 or described vertical detection pattern 326, for detection resolution is provided with the described detection line 322 that resolution increases gradually, therefore need not to establish the MTF pattern in addition, also can utilize described check pattern 320 to set MTF pattern with multiple resolution according to each focal length.
That is, in the described check pattern 320, according to the described MTF pattern 350 of the zone definitions of any setting.
On the one hand, when limiting the outer peripheral areas of surveyed area, the optimum position of described detection Figure 30 0 also is formed for detecting the distortion test section 390 of the distortion phenomenon of spatial frequency.
Figure 17 is the detection figure front schematic view of another embodiment of the present invention.
As shown in figure 17, detection Figure 40 0 of present embodiment is different with the foregoing description, and check pattern 320 is as the criterion with the radiation shape setting with described former dot pattern 310.
Wherein, described horizontal detection pattern 324 be arranged on separately with described former dot pattern 310 be as the criterion on/downside, described vertical detection pattern 326 is arranged on a left side/right side that is as the criterion with described former dot pattern 310 separately.
Simultaneously, described critical pattern 330 is arranged between described horizontal detection pattern 324 and the vertical detection pattern 326, and described each critical pattern 330 still is as the criterion with described former dot pattern and is symmetrical arranged.
Claims (7)
1. detection figure who is used for camera module detecting device comprises: former dot pattern, be as the criterion with decided to isolate the at interval center test section that includes check pattern that is provided with described former dot pattern,
The peripheral former dot pattern that is provided with at the periphery of described center test section, and the former dot pattern in described periphery is as the criterion and decide the peripheral test section that includes peripheral check pattern of isolation setting at interval with institute,
And comprise having a part in the described check pattern at least for detection resolution with detect MTF and a plurality of detection lines that the thickness that forms and isolation distance are kept institute's fixed-ratio.
2. the detection figure that is used for camera module detecting device according to claim 1, wherein, described check pattern comprises:
The horizontal detection pattern that described a plurality of detection line is as the criterion and is as the criterion and is provided with towards vertical direction with described initial point towards vertical detection pattern and described a plurality of detection line of horizontal direction setting with described initial point.
3. the detection figure that is used for camera module detecting device according to claim 2, wherein, in described vertical detection pattern or the described horizontal detection pattern, a part is set the pattern that is used to detect MTF for according to the focal length of camera module.
4. the detection figure that is used for camera module detecting device according to claim 1 wherein, also comprises:
Isolate the critical pattern that is provided with described former dot pattern with institute's set a distance, set the zone of described center test section by described critical pattern.
5. the detection figure that is used for camera module detecting device according to claim 1, wherein, described peripheral test section is arranged on the corner portions located of described detection figure.
6. the detection figure that is used for camera module detecting device according to claim 1, wherein, described peripheral test section comprises:
Peripheral former dot pattern,
Be arranged on the periphery of the former dot pattern in described periphery and carry out peripheral check pattern that resolution detects and
Be used to confirm the critical pattern of the critical zone of described peripheral test section.
7. the detection figure that is used for camera module detecting device according to claim 1, wherein, the outermost of described detection figure is provided for detecting the distortion test section of the distortion phenomenon of described detection figure.
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| CN200810180835A CN101738305A (en) | 2008-11-24 | 2008-11-24 | Detection picture for detection device of camera module |
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| CN200810180835A CN101738305A (en) | 2008-11-24 | 2008-11-24 | Detection picture for detection device of camera module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105791811A (en) * | 2014-09-30 | 2016-07-20 | 宁波舜宇光电信息有限公司 | Stereoscopic testing target and design method and forming method thereof |
| CN106842804A (en) * | 2016-12-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of TV Line parsing test patterns and its parsing method of testing |
| JP7507767B2 (en) | 2019-08-06 | 2024-06-28 | ライカ バイオシステムズ イメージング インコーポレイテッド | Physical Calibration Slide |
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2008
- 2008-11-24 CN CN200810180835A patent/CN101738305A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105791811A (en) * | 2014-09-30 | 2016-07-20 | 宁波舜宇光电信息有限公司 | Stereoscopic testing target and design method and forming method thereof |
| CN106842804A (en) * | 2016-12-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of TV Line parsing test patterns and its parsing method of testing |
| JP7507767B2 (en) | 2019-08-06 | 2024-06-28 | ライカ バイオシステムズ イメージング インコーポレイテッド | Physical Calibration Slide |
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