CN109451237A - A kind of focusing AA method and apparatus of camera module - Google Patents
A kind of focusing AA method and apparatus of camera module Download PDFInfo
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- CN109451237A CN109451237A CN201811348201.5A CN201811348201A CN109451237A CN 109451237 A CN109451237 A CN 109451237A CN 201811348201 A CN201811348201 A CN 201811348201A CN 109451237 A CN109451237 A CN 109451237A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
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- Automatic Focus Adjustment (AREA)
Abstract
The invention discloses a kind of focusing AA method and apparatus of camera module.Focusing AA method includes: step 1: carrying out focusing AA to the camera module, adjusts the relative position between the camera lens and sensor in the camera module；Step 2: whether the clearest shooting distance that the camera module is verified in test is required predetermined best shooting distance, if then carrying out step 3, if otherwise repeating step 1 and step 2；Step 3: the relative position between the camera lens and sensor in the camera module is fixed.Focusing AA method can carry out test verifying to the clearest shooting distance of the camera module by focusing AA, guarantee product quality.
Description
Technical field
The present invention relates to the focusing AA method and apparatus of field of photography more particularly to a kind of camera module.
Background technique
The camera module of mobile phone has a clearest shooting distance, when the distance between object and camera lens be this most
When clear shooting distance, the image that camera module (fixed-focus mould group or the AF mould group that do not focus) obtains is clearest.Complete
After the assembly process of camera module, Mo Zu manufacturer can carry out focusing AA to camera module, by adjusting camera lens and biography
Relative position between sensor so that the clearest shooting distance of camera module be client needed for it is predetermined it is best shooting away from
From finally the relative position between camera lens and sensor is fixed.
For (preposition) fixed-focus mould group that can not be focused, this clearest shooting distance ensure that fixed-focus mould group pre-
The image obtained in one section of fixed coverage is all enough clearly；For (postposition) AF mould group that can be focused, this
Clearest shooting distance affects the calculating speed and precision of the focus algorithm of AF mould group.
But whether the clearest shooting distance that not can guarantee by the camera module for the AA that focuses can be due to operation error
Or the reasons such as tolerance and deviate predetermined best shooting distance needed for client.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of focusing AA method of camera module and sets
It is standby.Focusing AA method can carry out test verifying to the clearest shooting distance of the camera module by focusing AA, guarantee to produce
Quality.
The technical problems to be solved by the invention are achieved by the following technical programs:
A kind of focusing AA method of camera module, comprising:
Step 1: focusing AA being carried out to the camera module, is adjusted between the camera lens and sensor in the camera module
Relative position；
Step 2: whether the clearest shooting distance that the camera module is verified in test is required predetermined best shooting distance,
If then carrying out step 3, if otherwise repeating step 1 and step 2；
Step 3: the relative position between the camera lens and sensor in the camera module is fixed.
Further, step 2 includes:
Step 2.1: the camera module being subjected to preview to a test calibration table through an optics auxiliary focusing mechanism, is obtained
Test calibration picture, wherein the measuring distance between camera lens and the test calibration table in the camera module is described
Predetermined best shooting distance needed for camera module；
Step 2.2: driving optics auxiliary focusing mechanism continuously to change the focus position of imaging ray, in the camera shooting
Optical focusing process is simulated in head mould group；
Step 2.3: changing according to clarity of the test calibration picture during optical focusing simulated, described in judgement
Whether the clearest shooting distance of camera module is between camera lens and the test calibration table in the camera module
Measuring distance, if then carrying out step 3, if otherwise repeating step 1 and step 2.
Further, step 2.3 includes:
Step 2.3.1: clarity variation of the test calibration picture during optical focusing simulated is continuously acquired；
Step 2.3.2: the clarity according to the test calibration picture changes, and calculates the clarity of the test calibration picture
Change curve；
Step 2.3.3: according to the clarity change curve, judge the camera module clearest shooting distance whether be
The measuring distance between camera lens and the test calibration table in the camera module, if then carrying out step 3, if otherwise weighing
Multiple step 1 and step 2.
Further, optics auxiliary focusing mechanism is continuously changed to by adjusting its focal length of lens or lens position
As the focus position of light.
Further, optics auxiliary focusing mechanism includes an adjustable lens Tlens mechanism.
A kind of focusing AA equipment of camera module, comprising:
Focus AA module, for carrying out focusing AA to the camera module, with adjust the camera lens in the camera module and
Relative position between sensor；
Authentication module is tested, for testing the camera module by focusing AA, to verify the camera module
Whether clearest shooting distance is required predetermined best shooting distance；
Position fixed module, for the camera module by test verifying to be fixed, with the fixation camera module
In camera lens and sensor between relative position.
Further, the test authentication module includes:
Test calibration table, for carrying out preview for the camera module, to obtain test calibration picture, with the camera
The measuring distance between camera lens in mould group is predetermined best shooting distance needed for the camera module；
Optics auxiliary focusing mechanism is used for when the camera module carries out preview to the test calibration table through it, quilt
The continuous focus position for changing imaging ray of driving, to simulate optical focusing process in the camera module；
Decision mechanism is sentenced for the clarity variation according to the test calibration picture during optical focusing simulated
Whether the clearest shooting distance for the camera module of breaking is camera lens in the camera module and the test calibration table
Between measuring distance.
Further, the decision mechanism includes processor and the memory being electrically connected respectively with the processor and company
Device is connect, the connector with the camera module for connecting to carry out data interaction；It is stored in the memory for institute
The test program for stating processor execution when the processor executes the test program, carries out following steps:
The test calibration picture is continuously acquired from the camera module by the connector；
Clarity according to the test calibration picture changes, and calculates the clarity change curve of the test calibration picture；
According to the clarity change curve, judge whether the clearest shooting distance of the camera module is required make a reservation for
Best shooting distance.
Further, the focal length of lens of optics auxiliary focusing mechanism is adjustable or lens position is adjustable.
Further, optics auxiliary focusing mechanism includes an adjustable lens Tlens mechanism.
The invention has the following beneficial effects: focusing AA methods can be to the clearest of the camera module by focusing AA
Shooting distance carries out test verifying, if if clearest shooting distance is not predetermined best shooting distance needed for client, it is right
The camera module re-starts focusing AA, to guarantee product quality.
Detailed description of the invention
The step of Fig. 1 is price adjustment AA method provided by the invention is schemed；
The step of Fig. 2 is step 2 in price adjustment AA method provided by the invention is schemed；
Fig. 3 is the schematic diagram that authentication module is tested in price adjustment AA equipment provided by the invention；
Fig. 4 is the schematic diagram of adjustable lens Tlens provided by the invention mechanism；
Fig. 5 is the working drawing one of the center Tlens component of adjustable lens Tlens mechanism；
Fig. 6 is the working drawing two of the center Tlens component of adjustable lens Tlens mechanism；
Fig. 7 is the clarity change curve that present invention test obtains.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment one
As shown in Figure 1, a kind of focusing AA method of camera module, comprising:
Step 1: focusing AA being carried out to the camera module 10, adjusts camera lens 101 and sensing in the camera module 10
Relative position between device 102；
In the step 1, focusing AA is carried out to the camera module 10 by a focusing AA module, focusing Dutch treatment journey is to take the photograph
As the conventional processing procedure in head test step, therefore it is not described in detail herein；The focusing AA module can be, but not limited to for
Camera AA test machine.
The camera module 10 is also possible to the AF mould group that can be focused either the fixed-focus mould group that can not be focused.
Step 2: whether the clearest shooting distance that the camera module 10 is verified in test is required predetermined best bat
Photographic range, if then carrying out step 3, if otherwise repeating step 1 and step 2；
In the step 2, the clearest shooting distance of the camera module 10 is surveyed by a test authentication module
Test card.
Wherein, required predetermined best shooting distance by client according to itself product demand depending on.
Specifically, as shown in Fig. 2, the step 2 includes:
Step 2.1: as shown in figure 3, the camera module 10 is penetrated an optics auxiliary focusing mechanism 20 to a test calibration
Table 30 carries out preview, obtains test calibration picture, wherein camera lens 101 and the test calibration in the camera module 10
Measuring distance between table 30 is predetermined best shooting distance needed for the camera module 10；
In the step 2.1, the test authentication module includes a test calibration table 30, an optics auxiliary focusing mechanism 20 and one
Decision mechanism, wherein
The test calibration table 30, for carrying out preview for the camera module 10, to obtain test calibration picture；
Optics auxiliary focusing mechanism 20, for being carried out through it to the test calibration table 30 in the camera module 10
When preview, by the continuous focus position for changing imaging ray of driving, to simulate optics pair in the camera module 10
Burnt process；
The decision mechanism, for becoming according to clarity of the test calibration picture during optical focusing simulated
Change, judges whether the clearest shooting distance of the camera module 10 is camera lens 101 and institute in the camera module 10
State the measuring distance between test calibration table 30.
Optics auxiliary focusing mechanism 20 is between the camera module 10 and test calibration table 30, light inputting end
Test calibration pattern towards on the test calibration table 30, light end is towards the mouth of finding a view in the camera module 10 out；Quilt
The imaging ray that the test calibration table 30 reflects enters the camera mould through after optics auxiliary focusing mechanism 20
It is imaged in group 10, forms the test calibration picture.
Preview is carried out to obtain the test calibration picture for the camera module 10 on the test calibration table 30
Test calibration pattern can be TVline test pattern, MTF test pattern or SFR test pattern etc..
Step 2.2: driving optics auxiliary focusing mechanism 20 continuously to change the focus position of imaging ray, in institute
It states and simulates optical focusing process in camera module 10；
In the step 2.2, optics auxiliary focusing mechanism 20 is continuously changed by adjusting its focal length of lens or lens position
Become the focus position of imaging ray, i.e. optics auxiliary focusing mechanism 20 includes the adjustable zoom lens machine of a focal length of lens
Structure, such as an adjustable lens Tlens mechanism or a Stretchable polymeric lens mechanism etc., alternatively, including that a lens position is adjustable
Lens actuating device, such as the motor mechanism equipped with optical lens etc..
Preferably, optics auxiliary focusing mechanism 20 includes an adjustable lens Tlens mechanism.
As shown in figure 4, adjustable lens Tlens mechanism includes surrounding package circuit 22 and center Tlens component 21,
In, there is piece anode of two pin 23(, a cathode on the surrounding package circuit 22) for accessing external power supply driving,
To realize the drive control to the center Tlens component 21；The center Tlens component 21 includes glass substrate 211, high score
Sub- polymer 212, glass film 213 and piezoelectric membrane 214 are oppositely arranged between the glass substrate 211 and glass film 213
And the encapsulation of high molecular polymer 212 is therebetween, the glass film 213 is fixed in the fitting of piezoelectric membrane 214
Another side on and be electrically connected with the drive output of the surrounding package circuit 22.
The working principle of adjustable lens Tlens mechanism: using the driving chip in the surrounding package circuit 22 to
When the piezoelectric membrane 214 supplies driving voltage, the piezoelectric membrane 214 can be vibrated to drive the glass film 213 to generate
Deformation, so that the high molecular polymer 212 encapsulated between the glass substrate 211 and glass film 213 is assembled, to produce
Raw different refractive index, to change the focus position of imaging ray, and different driving voltages can make the high molecular polymerization
Object 212 generates different degrees of aggregation, forms different focus positions.As shown in figure 5, when driving chip is not to the piezoelectricity
When film 214 supplies driving voltage, when imaging ray penetrates the adjustable lens Tlens mechanism, optical path does not change；Such as figure
Shown in 6, when driving chip supplies driving voltage to the piezoelectric membrane 214, imaging ray penetrates the adjustable lens Tlens
When mechanism, optical path changes, and directional light becomes gathering light, and with the increase of driving voltage, imaging ray gathers amplitude
Also (i.e. the focal length of adjustable lens Tlens mechanism is gradually become smaller by infinity) is being increased accordingly, by controlling driving voltage
Size change imaging ray focus position, to simulate optical zoom process in the camera module 10.
It illustrates, for AF mould group, in the mistake of 20 simulated optical of optics auxiliary focusing mechanism focusing
Cheng Zhong does not drive the voice coil motor of AF mould group, i.e., is not powered to the voice coil motor of AF mould group, avoids AF mould group itself oneself
Dynamic focus function influences simulation of the optics auxiliary focusing mechanism 20 to optical focusing process.
Step 2.3: according to clarity variation of the test calibration picture during optical focusing simulated, judgement
Whether the clearest shooting distance of the camera module 10 is camera lens 101 in the camera module 10 and test mark
The measuring distance between table 30 is determined, if then carrying out step 3, if otherwise repeating step 1 and step 2.
In the step 2.3, its focal length of lens is gradually decrease to by infinity in optics auxiliary focusing mechanism 20
Minimum (vice versa), alternatively, by its lens position by gradually being driven recently to farthest (vice versa) during, it is described to take the photograph
As head mould group 10 constantly gets the test calibration picture of different clarity, the decision mechanism passes through clearest test therein
Driving voltage, the focal length of lens or lens position corresponding to picture are demarcated to judge the clearest shooting of the camera module 10
Whether distance is required predetermined best shooting distance.
Specifically, the step 2.3 includes:
Step 2.3.1: clarity variation of the test calibration picture during optical focusing simulated is continuously acquired；
In step 2.3.1, the decision mechanism connects the camera module 10 and reads out of described camera module 10
Take the test calibration picture；The decision mechanism can be, but not limited to as PC.
Step 2.3.2: the clarity according to the test calibration picture changes, and calculates the clear of the test calibration picture
Clear degree change curve；
In step 2.3.2, the test program in the decision mechanism calculates the clear of each frame test calibration picture automatically
Clear degree, then output forms the clarity change curve.
It is described clear if the test calibration pattern is TVline test pattern in the clarity change curve
Spend change curve ordinate use TVline value, if the test calibration pattern be MTF test pattern or SFR test pattern,
Then the ordinate of the clarity change curve is using mtf value (final SFR test is also the mtf value for calculating image)；If described
Optics auxiliary focusing mechanism 20 is by adjusting its focal length of lens come simulated optical focus process, then the clarity variation is bent
The abscissa of line can be driving voltage or the focal length of lens, if optics auxiliary focusing mechanism 20 is by adjusting its lens position
If carrying out simulated optical focus process, then the abscissa of the clarity change curve can be driving voltage or lens position.
Step 2.3.3: according to the clarity change curve, judge the clearest shooting distance of the camera module 10
It whether is measuring distance between camera lens 101 and the test calibration table 30 in the camera module 10, if then carrying out
Step 3, if otherwise repeating step 1 and step 2.
It is right by TVline maximum value in the clarity change curve or MTF maximum value institute in step 2.3.3
Whether the point answered is required predetermined best shooting distance come the clearest shooting distance for judging the camera module 10.
In the present embodiment, clarity change curve as shown in Figure 7 is using TVline test pattern as the test
Demarcate pattern, using adjustable lens Tlens mechanism as optics auxiliary focusing mechanism 20 to the camera module 10 into
Line definition test obtains, wherein A point is corresponding to first test calibration picture that the camera module 10 obtains
Point (driving voltage is 0V or the focal length of lens is infinitely great), B point is the clearest test that the camera module 10 obtains
Point corresponding to calibration picture illustrates the clearest shooting distance of the camera module 10 if A point and B point coincide
As required predetermined best shooting distance illustrates the clearest of the camera module 10 if A point and B point are not overlapped
Shooting distance deviates from required predetermined best shooting distance.
If if the clearest shooting distance of the camera module 10 deviates from required predetermined best shooting distance, also
It can be according to driving voltage, the focal length of lens corresponding to the TVline maximum value or MTF maximum value on the clarity change curve
Or lens position, in conjunction with the measuring distance between the camera lens 101 and the test calibration table 30 in the camera module 10,
The clearest shooting distance for calculating the camera module 10 and its deviation between required predetermined best shooting distance
Value.
Step 3: the relative position between the camera lens 101 and sensor 102 in the camera module 10 is fixed.
In the step 3, by a position fixed module come to the opposite position between the camera lens 101 and sensor 102
It sets and is fixed, dispensing is carried out generally between the camera lens 101 and camera lens carrier and is fixed, dispensing technique for fixing is camera tune
Common process in burnt Dutch treatment journey, therefore be not described in detail herein；The position fixed module can be, but not limited to take the photograph
As head AA dispenser.
Focusing AA method can carry out test verifying to the clearest shooting distance of the camera module 10 by focusing AA,
If if clearest shooting distance is not predetermined best shooting distance needed for client, to the camera module 10 again into
Row focusing AA, to guarantee product quality.
Embodiment two
A kind of focusing AA equipment of camera module, comprising:
Focusing AA module, for carrying out focusing AA to the camera module 10, to adjust the mirror in the camera module 10
Relative position between first 101 and sensor 102；
Authentication module is tested, for testing the camera module 10 by focusing AA, to verify the camera module
Whether 10 clearest shooting distance is required predetermined best shooting distance；
Position fixed module, for the camera module 10 by test verifying to be fixed, with the fixation camera mould
The relative position between camera lens 101 and sensor 102 in group 10.
The focusing AA module can be, but not limited to as camera AA test machine；The position fixed module can with but it is unlimited
In for camera AA dispenser, dispensing is carried out between the camera lens 101 and camera lens carrier and is fixed.
As shown in figure 3, the test authentication module includes:
Test calibration table 30 is taken the photograph with obtaining test calibration picture with described for carrying out preview for the camera module 10
As the measuring distance between the camera lens 101 in head mould group 10 is predetermined best shooting distance needed for the camera module 10；
Optics auxiliary focusing mechanism 20, for carrying out preview to the test calibration table 30 through it in the camera module 10
When, by the continuous focus position for changing imaging ray of driving, to simulate optical focusing mistake in the camera module 10
Journey；
Decision mechanism is sentenced for the clarity variation according to the test calibration picture during optical focusing simulated
Whether the clearest shooting distance for the camera module 10 of breaking is camera lens 101 in the camera module 10 and the test
Measuring distance between calibration scale 30.
Optics auxiliary focusing mechanism 20 is between the camera module 10 and test calibration table 30, light inputting end
Test calibration pattern towards on the test calibration table 30, light end is towards the mouth of finding a view in the camera module 10 out；Quilt
The imaging ray that the test calibration table 30 reflects enters the camera mould through after optics auxiliary focusing mechanism 20
It is imaged in group 10, forms the test calibration picture.
Preview is carried out to obtain the test calibration picture for the camera module 10 on the test calibration table 30
Test calibration pattern can be TVline test pattern, MTF test pattern or SFR test pattern etc..
Wherein, required predetermined best shooting distance by client according to itself product demand depending on.
The focal length of lens of optics auxiliary focusing mechanism 20 is adjustable or lens position is adjustable, i.e., the described optics auxiliary focusing
Mechanism 20 includes the adjustable zoom lens mechanism of a focal length of lens, such as an adjustable lens Tlens mechanism or a stretchable polymerization
Object lens mechanism etc., alternatively, including the adjustable lens actuating device of a lens position, such as the motor machine equipped with optical lens
Structure etc..
Preferably, optics auxiliary focusing mechanism 20 includes an adjustable lens Tlens mechanism.
As shown in figure 4, adjustable lens Tlens mechanism includes surrounding package circuit 22 and center Tlens component 21,
In, there is piece anode of two pin 23(, a cathode on the surrounding package circuit 22) for accessing external power supply driving,
To realize the drive control to the center Tlens component 21；The center Tlens component 21 includes glass substrate 211, high score
Sub- polymer 212, glass film 213 and piezoelectric membrane 214 are oppositely arranged between the glass substrate 211 and glass film 213
And the encapsulation of high molecular polymer 212 is therebetween, the glass film 213 is fixed in the fitting of piezoelectric membrane 214
Another side on and be electrically connected with the drive output of the surrounding package circuit 22.
The working principle of adjustable lens Tlens mechanism: using the driving chip in the surrounding package circuit 22 to
When the piezoelectric membrane 214 supplies driving voltage, the piezoelectric membrane 214 can be vibrated to drive the glass film 213 to generate
Deformation, so that the high molecular polymer 212 encapsulated between the glass substrate 211 and glass film 213 is assembled, to produce
Raw different refractive index, to change the focus position of imaging ray, and different driving voltages can make the high molecular polymerization
Object 212 generates different degrees of aggregation, forms different focus positions.As shown in figure 5, when driving chip is not to the piezoelectricity
When film 214 supplies driving voltage, when imaging ray penetrates the adjustable lens Tlens mechanism, optical path does not change；Such as figure
Shown in 6, when driving chip supplies driving voltage to the piezoelectric membrane 214, imaging ray penetrates the adjustable lens Tlens
When mechanism, optical path changes, and directional light becomes gathering light, and with the increase of driving voltage, imaging ray gathers amplitude
Also (i.e. the focal length of adjustable lens Tlens mechanism is gradually become smaller by infinity) is being increased accordingly, by controlling driving voltage
Size change imaging ray focus position, to simulate optical zoom process in the camera module 10.
In clarity detection process, its focal length of lens is gradually reduced by optics auxiliary focusing mechanism 20 by infinity
To minimum (vice versa), alternatively, by its lens position by gradually being driven recently to farthest (vice versa), the camera mould
Group 10 constantly gets the test calibration picture of different clarity, passes through drive corresponding to clearest test calibration picture therein
Whether dynamic voltage, the focal length of lens or lens position are required pre- come the clearest shooting distance for judging the camera module 10
Fixed best shooting distance.
The decision mechanism can be, but not limited to be also used to drive the optics auxiliary pair for PC, and preferably
Focusing mechanism 20 continuously changes the focus position of imaging ray.
The decision mechanism includes processor and the memory and connector that are electrically connected respectively with the processor, described
Connector is for connecting with the camera module 10 to carry out data interaction；It is stored in the memory for the processor
The test program of execution when the processor executes the test program, carries out following steps:
The test calibration picture is continuously acquired from the camera module 10 by the connector；
The decision mechanism further includes driver, for connecting driving optics auxiliary focusing mechanism 20.Reading the survey
When picture is determined in test-object, the processor also drives optics auxiliary focusing mechanism 20 continuously to change by the driver simultaneously
The focus position of imaging ray.
Clarity according to the test calibration picture changes, and the clarity variation for calculating the test calibration picture is bent
Line；
In the calculating clarity change curve, the test program in the decision mechanism calculates each frame test calibration automatically
The clarity of picture, then output forms the clarity change curve.
It is described clear if the test calibration pattern is TVline test pattern in the clarity change curve
Spend change curve ordinate use TVline value, if the test calibration pattern be MTF test pattern or SFR test pattern,
Then the ordinate of the clarity change curve is using mtf value (final SFR test is also the mtf value for calculating image)；If described
Optics auxiliary focusing mechanism 20 is by adjusting its focal length of lens come simulated optical focus process, then the clarity variation is bent
The abscissa of line can be driving voltage or the focal length of lens, if optics auxiliary focusing mechanism 20 is by adjusting its lens position
If carrying out simulated optical focus process, then the abscissa of the clarity change curve can be driving voltage or lens position.
According to the clarity change curve, judge whether the clearest shooting distance of the camera module 10 is required
Predetermined best shooting distance.
When judging, pass through point corresponding to the TVline maximum value or MTF maximum value in the clarity change curve
To judge whether the clearest shooting distance of the camera module 10 is required predetermined best shooting distance.
In the present embodiment, clarity change curve as shown in Figure 7 is using TVline test pattern as the test
Demarcate pattern, using adjustable lens Tlens mechanism as optics auxiliary focusing mechanism 20 to the camera module 10 into
Line definition test obtains, wherein A point is corresponding to first test calibration picture that the camera module 10 obtains
Point (driving voltage is 0V or the focal length of lens is infinitely great), B point is the clearest test that the camera module 10 obtains
Point corresponding to calibration picture illustrates the clearest shooting distance of the camera module 10 if A point and B point coincide
As required predetermined best shooting distance illustrates the clearest of the camera module 10 if A point and B point are not overlapped
Shooting distance deviates from required predetermined best shooting distance.
If if the clearest shooting distance of the camera module 10 deviates from required predetermined best shooting distance, also
It can be according to driving voltage, the focal length of lens corresponding to the TVline maximum value or MTF maximum value on the clarity change curve
Or lens position, in conjunction with the measuring distance between the camera lens 101 and the test calibration table 30 in the camera module 10,
The clearest shooting distance for calculating the camera module 10 and its deviation between required predetermined best shooting distance
Value.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (10)
1. a kind of focusing AA method of camera module characterized by comprising
Step 1: focusing AA being carried out to the camera module, is adjusted between the camera lens and sensor in the camera module
Relative position；
Step 2: whether the clearest shooting distance that the camera module is verified in test is required predetermined best shooting distance,
If then carrying out step 3, if otherwise repeating step 1 and step 2；
Step 3: the relative position between the camera lens and sensor in the camera module is fixed.
2. the focusing AA method of camera module according to claim 1, which is characterized in that step 2 includes:
Step 2.1: the camera module being subjected to preview to a test calibration table through an optics auxiliary focusing mechanism, is obtained
Test calibration picture, wherein the measuring distance between camera lens and the test calibration table in the camera module is described
Predetermined best shooting distance needed for camera module；
Step 2.2: driving optics auxiliary focusing mechanism continuously to change the focus position of imaging ray, in the camera shooting
Optical focusing process is simulated in head mould group；
Step 2.3: changing according to clarity of the test calibration picture during optical focusing simulated, described in judgement
Whether the clearest shooting distance of camera module is between camera lens and the test calibration table in the camera module
Measuring distance, if then carrying out step 3, if otherwise repeating step 1 and step 2.
3. the focusing AA method of camera module according to claim 2, which is characterized in that step 2.3 includes:
Step 2.3.1: clarity variation of the test calibration picture during optical focusing simulated is continuously acquired；
Step 2.3.2: the clarity according to the test calibration picture changes, and calculates the clarity of the test calibration picture
Change curve；
Step 2.3.3: according to the clarity change curve, judge the camera module clearest shooting distance whether be
The measuring distance between camera lens and the test calibration table in the camera module, if then carrying out step 3, if otherwise weighing
Multiple step 1 and step 2.
4. the focusing AA method of camera module according to claim 2 or 3, which is characterized in that the optics auxiliary pair
Focusing mechanism continuously changes the focus position of imaging ray by adjusting its focal length of lens or lens position.
5. the focusing AA method of camera module according to claim 2 or 3, which is characterized in that the optics auxiliary pair
Focusing mechanism includes an adjustable lens Tlens mechanism.
6. a kind of focusing AA equipment of camera module characterized by comprising
Focus AA module, for carrying out focusing AA to the camera module, with adjust the camera lens in the camera module and
Relative position between sensor；
Authentication module is tested, for testing the camera module by focusing AA, to verify the camera module
Whether clearest shooting distance is required predetermined best shooting distance；
Position fixed module, for the camera module by test verifying to be fixed, with the fixation camera module
In camera lens and sensor between relative position.
7. the focusing AA equipment of camera module according to claim 6, which is characterized in that the test authentication module packet
It includes:
Test calibration table, for carrying out preview for the camera module, to obtain test calibration picture, with the camera
The measuring distance between camera lens in mould group is predetermined best shooting distance needed for the camera module；
Optics auxiliary focusing mechanism is used for when the camera module carries out preview to the test calibration table through it, quilt
The continuous focus position for changing imaging ray of driving, to simulate optical focusing process in the camera module；
Decision mechanism is sentenced for the clarity variation according to the test calibration picture during optical focusing simulated
Whether the clearest shooting distance for the camera module of breaking is camera lens in the camera module and the test calibration table
Between measuring distance.
8. the focusing AA equipment of camera module according to claim 6, which is characterized in that the decision mechanism includes place
Reason device and the memory and connector being electrically connected respectively with the processor, the connector are used for and the camera module
Connection is to carry out data interaction；The test program executed for the processor is stored in the memory, the processor is held
When the row test program, following steps are carried out:
The test calibration picture is continuously acquired from the camera module by the connector；
Clarity according to the test calibration picture changes, and calculates the clarity change curve of the test calibration picture；
According to the clarity change curve, judge whether the clearest shooting distance of the camera module is required make a reservation for
Best shooting distance.
9. the focusing AA equipment of camera module according to claim 7 or 8, which is characterized in that the optics auxiliary pair
The focal length of lens of focusing mechanism is adjustable or lens position is adjustable.
10. the focusing AA equipment of camera module according to claim 7 or 8, which is characterized in that the optics auxiliary pair
Focusing mechanism includes an adjustable lens Tlens mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348201.5A CN109451237B (en) | 2018-11-13 | 2018-11-13 | AA focusing method and device for camera module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348201.5A CN109451237B (en) | 2018-11-13 | 2018-11-13 | AA focusing method and device for camera module |
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| Publication Number | Publication Date |
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| CN109451237A true CN109451237A (en) | 2019-03-08 |
| CN109451237B CN109451237B (en) | 2020-11-03 |
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| CN201811348201.5A Active CN109451237B (en) | 2018-11-13 | 2018-11-13 | AA focusing method and device for camera module |
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| CN110708447A (en) * | 2019-10-14 | 2020-01-17 | Oppo广东移动通信有限公司 | Camera module and terminal equipment |
| CN110730309A (en) * | 2019-11-21 | 2020-01-24 | 深圳市圆周率软件科技有限责任公司 | Focusing method of camera module |
| CN111263034A (en) * | 2019-05-27 | 2020-06-09 | 苏州松健光学科技有限公司 | Vehicle-mounted camera module focusing device and method |
| CN111300401A (en) * | 2019-11-06 | 2020-06-19 | 长沙迈迪克智能科技有限公司 | Blood station refrigeration house intelligent visual positioning and grabbing system and method |
| CN111711813A (en) * | 2020-05-29 | 2020-09-25 | 重庆盛泰光电有限公司 | Method for testing AA optimal sinking parameter in camera module |
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| CN113459006A (en) * | 2021-07-30 | 2021-10-01 | 华天慧创科技（西安）有限公司 | Focusing device and method for camera module microspur AA |
| CN113709337A (en) * | 2021-08-17 | 2021-11-26 | 信利光电股份有限公司 | Camera module and active focusing process |
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| CN111300401A (en) * | 2019-11-06 | 2020-06-19 | 长沙迈迪克智能科技有限公司 | Blood station refrigeration house intelligent visual positioning and grabbing system and method |
| CN110730309A (en) * | 2019-11-21 | 2020-01-24 | 深圳市圆周率软件科技有限责任公司 | Focusing method of camera module |
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| CN111726527A (en) * | 2020-06-23 | 2020-09-29 | 上海摩勤智能技术有限公司 | Focus testing method and device |
| CN111726527B (en) * | 2020-06-23 | 2021-11-16 | 上海摩勤智能技术有限公司 | Focus testing method and device |
| CN111855156A (en) * | 2020-07-29 | 2020-10-30 | 杭州海康微影传感科技有限公司 | Sampling control method and testing device for lens detection and sampling tool |
| CN111855156B (en) * | 2020-07-29 | 2022-07-26 | 杭州海康微影传感科技有限公司 | Sampling control method and testing device for lens detection and sampling tool |
| CN114666487A (en) * | 2020-12-22 | 2022-06-24 | 余姚舜宇智能光学技术有限公司 | Focusing positioning method and system and electronic equipment |
| CN114666487B (en) * | 2020-12-22 | 2024-04-09 | 余姚舜宇智能光学技术有限公司 | Focusing and positioning method and system and electronic equipment |
| CN113315897A (en) * | 2021-05-20 | 2021-08-27 | 江西欧迈斯微电子有限公司 | AA method, test scale, AA equipment, camera module and electronic equipment |
| CN113459006A (en) * | 2021-07-30 | 2021-10-01 | 华天慧创科技（西安）有限公司 | Focusing device and method for camera module microspur AA |
| CN113709337A (en) * | 2021-08-17 | 2021-11-26 | 信利光电股份有限公司 | Camera module and active focusing process |
| CN114157783A (en) * | 2021-11-23 | 2022-03-08 | 信利光电股份有限公司 | Camera module with TLENS, manufacturing method and electronic equipment thereof |
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