CN100465783C - Focusi regulating method for optical image - Google Patents
Focusi regulating method for optical image Download PDFInfo
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- CN100465783C CN100465783C CNB2005101088595A CN200510108859A CN100465783C CN 100465783 C CN100465783 C CN 100465783C CN B2005101088595 A CNB2005101088595 A CN B2005101088595A CN 200510108859 A CN200510108859 A CN 200510108859A CN 100465783 C CN100465783 C CN 100465783C
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Abstract
This invention involves a focusing adjustment method of optical image, which analyzes variability of the optical image that is formed after the external light sources drill through the lens module in the way of data analysis, and at least contains the following steps: first, respectively calculating the two-dimensional geometry tilt vector T (X, Y), the image diagonal spin value D and the image four corners equal value M according to the focusing value of four corners, then, based on the values from calculation, respectively adjusting the tilt and direction of the lens module, and determining their own optical quality and the degree of uniformity after adjustment.
Description
Technical field
The present invention relates to a kind of focusing regulation method of optical lens module, relate in particular to a kind of focus value of four corners that utilize optical imagery and carry out numerical analysis, to finish the focusing regulation method that focuses on adjustment work automatically.
Background technology
At present relevant optical lens module (for example, be applied to the optical lens module in the products such as picture-phone or cell phone cameras) focusing adjustment testing, normally grip in the tool by manual rotating lens module to the camera lens that is provided with imageing sensor, and be rotated lifting along the mirror direction of principal axis, thereby reach the purpose that focuses on adjustment.
See also Fig. 1, it is for producing the exemplary plot that the optical imagery that indicates the focus value with four corners focuses on Adjustment System 10.Promptly in Fig. 1, behind the minute surface 121 of external light source 11 in passing camera lens module 12, be projected to the imageing sensor of being located in the camera lens gripping tool 13 14, afterwards, therefore this imageing sensor 14 promptly can produce output optical imagery I1, and signal is connected in the microprocessor 15 of this imageing sensor 14, promptly can focus on and (or be called modulation transfer function (ModulationTransfer Function with a kind of full frame, MTF)) algorithm calculates 4 corner focus value: UL1, UR1, DL1, the DR1 of this optical imagery I1.Wherein, the thread 122 of this camera lens module 12 is in order to screw in the thread seat 131 that grips the inner side place of tool 13 in this camera lens.Certainly, about the concrete structure of this thread 122 and this thread seat 131 and the mode that mutually combines, should be the inventive features that those skilled in the art know and non-institute of the present invention desire is protected, so do not repeat them here.
For example, see also Fig. 2 (a), 2 (b), the comparative example figure before and after its 4 corner focus value that are respectively the known optical image are adjusted.Promptly in Fig. 2 (a), 4 the corner focus value UL1 of this optical imagery I1 shown in its hypothesis Fig. 1, UR1, DL1, the numeric distribution state of DR1, comparatively average and be all 45, and establish if think above-mentioned 4 corner focus value UL1 after the testing staff assesses, UR1, DL1, the numerical value of DR1 is low excessively, and (the focus value low more focusing effect of promptly representing in corner is poor more usually, for example, be lower than 45 and promptly can be considered poor focusing) time, the testing staff promptly can adjust spiral shell with manual mode and be located at this camera lens and grip this camera lens module 12 in tool 13, and make it carry out a left side along X-direction (that is mirror direction of principal axis), move right.Thus, when the numerical value of 4 corner focus value UL1 among this optical imagery I1, UR1, DL1, DR1 by by 45 increase shown in Fig. 2 (b) 55, even when higher, i.e. expression reaches adjustment and improves the focusing effect of this camera lens module 12.
Yet, the problem of the known adjustment type of focusing is, in case occur tilting (tilt) problem between this camera lens module 12 and this imageing sensor 131, it will make 4 corner focus value UL1, UR1, DL1, the DR1 of this optical imagery I1 present the phenomenon of distribution at random.Promptly shown in Fig. 2 (c), the numerical values recited of among this optical imagery I1 this 4 corner focus value: UL1, UR1, DL1, DR1, be respectively: 50,45,30,41, at this moment, even the testing staff makes this camera lens module 12 move along X-direction with manual mode, also can't effectively improve the distribution at random that numerical value presented of these 4 corner focus value UL1, UR1, DL1, DR1.Reason wherein, only can be along the structural limitations factor that X-direction moves except being subjected to this camera lens gripping tool 13, the more important thing is that known technology can't grasp this camera lens module 12 present residing inclination size and angles of inclination really at all, also therefore can't solve the focusing problem of being brought because of the inclination factor of this camera lens module 12 at random in view of the above.
Still more, in case the real generation reason of focusing error stems from 12 optical system error that caused of this camera lens module when making assembling, rather than when coming from the assembly error that itself and this imageing sensor 131 taken place during collocation mutually, the focusing regulation method of known optical camera lens module can't be differentiated in advance this class situation and learn.Certainly, adjust the assessment of effect for the global focus behind this camera lens module 12 of adjustment and move, known technology obviously also can't carry out.
Summary of the invention
Propose one of fundamental purpose of the present invention, promptly be desirable to provide and a kind ofly can grasp and, carry out the two-dimensional directional adjustment, thereby improve the focusing regulation method of the optical lens module of optical imagery focusing effect according to the inclination size and the vergence direction of camera lens module.
Another purpose that the present invention proposes promptly is desirable to provide a kind of focusing regulation method that can differentiate the optical lens module in focusing error generation source.
The another purpose that the present invention proposes promptly is desirable to provide a kind of focusing regulation method that can assess the optical lens module that focuses on the adjustment effect.
The present invention comprises about a kind of focusing regulation method of optical lens module: external light source is provided, forms optical imagery after it passes camera lens module; Obtain the focus value in four corners of this optical imagery: UR, UL, DR, DL; Carry out first image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all modifying factor; And be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery that described camera lens module produces.
According to the above-mentioned conception of the present invention, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
According to the above-mentioned conception of the present invention, wherein X=((DR+UR)-(UL+DL))/(4 * b), Y=((UR+UL)-(DR+DL))/(4 * a).
According to the above-mentioned conception of the present invention, wherein this method also comprises the following step: carry out second image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And according to this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
According to the above-mentioned conception of the present invention, D=((DR+UL)-(UR+DL))/4 wherein.
According to the above-mentioned conception of the present invention, wherein this method more comprises the following step: carry out the 3rd image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR+UL+UR+DL); And, whether arrived best homogenising with the focusing adjustment of judging this optical imagery according to four jiaos of equal values of this image.
According to the above-mentioned conception of the present invention, wherein M=((DR+UL+UR+DL))/4.
Another preferable practice of the present invention, the focusing regulation method for about a kind of optical lens module comprises: external light source is provided, forms optical imagery after passing camera lens module; Obtain the focus value in four corners of this optical imagery: UR, UL, DR, DL; Carry out first image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And according to this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
According to the above-mentioned conception of the present invention, D=((DR+UL)-(UR+DL))/4 wherein.
According to the above-mentioned conception of the present invention, wherein this method also comprises the following step: carry out second image analysis program, be tilted to value to obtain a two-dimensional geometry: and T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all a modifying factor; And be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery.
According to the above-mentioned conception of the present invention, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
According to the above-mentioned conception of the present invention, wherein X=((DR+UR)-(UL+DL))/(4 * b), Y=((UR+UL)-(DR+DL))/(4 * a).
According to the above-mentioned conception of the present invention, wherein this method also comprises the following step: carry out the 3rd image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR+UL+UR+DL); And, whether arrived best homogenising with the focusing adjustment of judging this optical imagery according to four jiaos of equal values of this image.
According to the above-mentioned conception of the present invention, wherein M=((DR+UL+UR+DL))/4.
The another preferable practice of the present invention, the focusing regulation method for about a kind of optical lens module comprises: external light source is provided, forms optical imagery after passing camera lens module; Obtain the focus value in four corners of this optical imagery: UR, UL, DR, DL; Carry out first image analysis program, to obtain four jiaos of equal value: M of an image; Wherein, M=(DR+UL+UR+DL); And therefore four jiaos of equal values of this image, whether arrived best homogenising with the focusing adjustment of judging this optical imagery.
According to the above-mentioned conception of the present invention, wherein M=((DR+UL+UR+DL))/4.
According to the above-mentioned conception of the present invention, wherein this method more comprises the following step: carry out second image analysis program, be tilted to value to obtain a two-dimensional geometry: and T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all a modifying factor; And be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery.
According to the above-mentioned conception of the present invention, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
According to the above-mentioned conception of the present invention, wherein X=((DR+UR)-(UL+DL))/(4 * b), Y=((UR+UL)-(DR+DL))/(4 * a).
According to the above-mentioned conception of the present invention, wherein this method more comprises the following step: carry out the 3rd image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And therefore this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
According to the above-mentioned conception of the present invention, D=((DR+UL)-(UR+DL))/4 wherein.
Description of drawings
It indicates the exemplary plot of the optical imagery focusing Adjustment System of the focus value with four corners Fig. 1 for generation;
Comparative example figure before and after its 4 corner focus value that are respectively the known optical image of Fig. 2 (a), 2 (b) are adjusted;
It is 4 corners focusing of known another optical imagery for Fig. 2 (c);
It is of the present invention one preferable enforcement example architecture figure for Fig. 3;
It is the conceptual schematic view of the first preferable implementation method of the present invention for Fig. 4;
It is the conceptual schematic view of the second preferable implementation method of the present invention for Fig. 5;
It is respectively different camera lens module after finishing the present invention and carrying this first image analysis program in this second preferred embodiment Fig. 6 (a), 6 (b), the comparative example figure between its corresponding optical imagery I3, I4 that produces;
The effect comparison sheet is adjusted in the focusing of Fig. 7 optical imagery.
Wherein, description of reference numerals is as follows:
10,20 optical imagerys focus on Adjustment System
11,21 external light sources, 12,22 camera lens modules
121,221 minute surfaces, 122 threads
13,23 camera lenses grip tool 131 thread seats
231 grip supporting part 232 accommodation spaces
14,24 imageing sensors
15,25 microprocessor S2 move control signal
I1～I4 optical imagery
The focus value in four corners of UL1, UR1, DL1, DR1 optical imagery I1
The focus value in four corners of UL2, UR2, DL2, DR2 optical imagery I2
The focus value in four corners of UL3, UR3, DL3, DR3 optical imagery I3
The focus value in four corners of UL4, UR4, DL4, DR4 optical imagery I4
(X, Y) two-dimensional geometry is tilted to value to T
Four jiaos of equal value D images of M image diagonal angle spinor value
Embodiment
Below enumerate a preferred embodiment and conjunction with figs. describing the present invention in detail, right those skilled in the art know that all this only is one for example, and are not in order to limit the present invention.
At first, see also Fig. 3, it is of the present invention one preferable enforcement framework 20 exemplary plot.In Fig. 3, behind the minute surface 221 of external light source 21 in passing camera lens module 22, project the imageing sensor of being located in the camera lens gripping tool 23 24, afterwards, therefore this imageing sensor 24 promptly can produce output optical imagery I2, and signal is connected in the microprocessor 25 of this imageing sensor 24, promptly can focus on and (or be called modulation transfer function (Modulation Transfer Function with a kind of full frame, MTF)) algorithm calculates 4 corner focus value: UL2, UR2, DL2, the DR2 of this optical imagery I2.Wherein, grip tool 23 inner side places around being provided with a plurality of gripping supporting parts 231 at this camera lens, and this a plurality of gripping supporting parts 231 are placed in wherein for this camera lens module 22 around formation accommodation space 232.So by controlling the contact strength power that these a plurality of gripping supporting parts 231 are resisted against this camera lens module 22, the fine setting that can make this camera lens module 22 carry out two-dimensional directional is smoothly moved.Certainly; relevant these a plurality of gripping supporting parts 231 of how controlling are finely tuned mobile embodiment; for example; the elasticity adjustment assembly (as shown in Figure 3) that it is controlled automatically for accepting mobile control signal S2; or for accepting the elasticity adjustment assembly (scheming not shown) of manual adjustment elasticity dynamics; concrete enforcement structure with this a plurality of gripping supporting part 231 itself should be all the inventive features that those skilled in the art know and non-institute of the present invention desire is protected, so promptly repeat no more at this.
The invention is characterized in, this microprocessor 25 can be according to these 4 corner focus value: UL2, UR2, DL2, DR2, be tilted to value T (X and calculate two-dimensional geometry respectively, Y), four jiaos of equal value M of image diagonal angle spinor value D and image, accurately to grasp this camera lens module 22 present residing angle of inclination and vergence directions, and the generation reason of understanding its tilt phenomenon, and finely tune mobile foundation as these a plurality of gripping supporting parts 231 of subsequent control.
Please cooperate and consult Fig. 4, it is the conceptual schematic view of the first preferable implementation method of the present invention, this preferred embodiment only discloses and utilizes this two-dimensional geometry to be tilted to value T (X, Y) and four jiaos of equal value M of this image finish automatic focus adjustment work, (promptly refer to distinguish and come from the optical system error that this camera lens module 22 itself is produced when making as for generation reason how to distinguish optical parallax, or come from the assembly error that this camera lens module 22 and this imageing sensor 131 are taken place during collocation mutually), then not in the discussion scope of this preferred embodiment.In Fig. 4, comprise the following step:
Step 41: beginning;
Step 42: this external light source 21 is provided, forms this optical imagery I2 to pass these camera lens module 22 backs;
Step 43: the focus value that obtains four corners of this optical imagery I2: UR2, UL2, DR2, DL2;
Step 44: carry out first image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR2+UR2)-(UL2+DL2))/b, Y=((UR2+UL2)-(DR2+DL2))/a, a, b are all a modifying factor (promptly, it is not that the outward appearance of equal proportion is than modifying factor in order to revise between the length and width yet);
Thus, by this two-dimensional geometry be tilted to value T (X, Y), can learn the tilt quantity that this camera lens module 22 is present:
And present residing angle of inclination: arctan (Y/X), thereby can carry out the follow-up even focusing effect of adjusting this camera lens module 22 automatically according to these more accurate data for this microprocessor 25;
With the optical imagery I1 shown in Fig. 2 (c) is example, the numerical values recited of among this optical imagery I1 this 4 corner focus value: UL1, UR1, DL1, DR1 is respectively: 50,45,30,41, calculate as the mode that discloses with the invention described above this moment, can learn that these camera lens module 22 present residing tilt quantity are 12.37, and the angle of inclination is 45 degree;
Certainly, about the more preferred implementation at above-mentioned tilt quantity and angle of inclination, refer to that this modifying factor a, b can be respectively 3,4, or be respectively 4,3; And, X=((DR2+UR2)-(UL2+DL2))/(4 * b), Y=((UR2+UL2)-(DR2+DL2))/(4 * a);
Step 45: be tilted to value T (X according to this two-dimensional geometry, Y), this microprocessor 25 produces corresponding automatically and can be in order to this mobile control signal S2 of the contact strength power of regulating and control these a plurality of gripping supporting parts 231, be arranged in the space orientation of this camera lens module 22 of this accommodation space 232 with adjustment, thereby reach the purpose of the even focusing effect that improves this camera lens module 22;
Step 46: carry out second image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR2+UL2+UR2+DL2);
Certainly, the more preferred implementation of relevant four jiaos of equal value M of this image refers to M=((DR2+UL2+UR2+DL2))/4; And
Step 47: according to four jiaos of equal values of this image, this microprocessor 25 can judge according to this whether the focusing adjustment of this optical imagery I2 has arrived best homogenising;
Step 48: finish.
Certainly, further carry out the above-mentioned function that can distinguish the generation reason of optical parallax automatically as desiring, then see also Fig. 5, it is the conceptual schematic view of the second preferable implementation method of the present invention.And, in Fig. 5, comprise the following step:
Step 51: beginning;
Step 52: this external light source 21 is provided, forms this optical imagery I2 to pass these camera lens module 22 backs;
Step 53: the focus value that obtains four corners of this optical imagery I2: UR2, UL2, DR2, DL2;
Step 54: carry out first image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR2+UR2)-(UL2+DL2))/b, Y=((UR2+UL2)-(DR2+DL2))/a, a, b are all a modifying factor (promptly, it is not that the outward appearance of equal proportion is than modifying factor in order to revise between the length and width yet);
Thus, by this two-dimensional geometry be tilted to value T (X, Y), can learn to make this camera lens module 22 present residing tilt quantity:
And present residing angle of inclination: arctan (Y/X), thereby can carry out the follow-up even focusing effect of adjusting this camera lens module 22 automatically according to these more accurate data for this microprocessor 25;
Certainly, about the more preferred implementation at above-mentioned tilt quantity and angle of inclination, refer to that this modifying factor a, b can be respectively 3,4, or be respectively 4,3; And, X=((DR2+UR2)-(UL2+DL2))/(4 * b), Y=((UR2+UL2)-(DR2+DL2))/(4 * a);
Step 55: be tilted to value T (X according to this two-dimensional geometry, Y), this microprocessor 25 produces corresponding automatically and can be in order to this mobile control signal S2 of the contact strength power of regulating and control these a plurality of gripping supporting parts 231, be arranged in the space orientation of this camera lens module 22 of this accommodation space 232 with adjustment, thereby improve the even focusing effect of this camera lens module 22;
Step 56: carry out second image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR2+UL2+UR2+DL2);
Certainly, the more preferred implementation of relevant four jiaos of equal value M of this image refers to M=((DR2+UL2+UR2+DL2))/4;
Step 57: according to four jiaos of equal values of this image, this microprocessor 25 can judge according to this whether the focusing adjustment of this optical imagery I2 has arrived best homogenising;
Step 58: carry out the 3rd image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR2+UL2)-(UR2+DL2); And
Certainly, the more preferred implementation of relevant this image diagonal angle spinor value D refers to D=((DR2+UL2)-(UR2+DL2))/4;
Step 59: according to this image diagonal angle spinor value D, this microprocessor 25 can be judged the optics system error of this camera lens module 22 according to this;
Step 510: finish.
The present invention proposes the purpose of above-mentioned second preferred embodiment, be the inclination of avoiding some camera lens modules to be caused because of the assembly error, after focusing on adjustment work according to tilt quantity that method calculated proposed by the invention and angle of inclination, the situation of the quality of erroneous judgement camera lens module still takes place, and causes reducing whole detection quality.
For example, see also Fig. 6 (a), 6 (b), it is respectively different camera lens module after finishing the present invention and carrying this first image analysis program in this second preferred embodiment, the comparative example figure between its corresponding optical imagery I3, I4 that produces.
Say again, after finishing this second image analysis program in this second preferred embodiment respectively, this optical imagery I3, I4 can find, in order to the camera lens quality of this camera lens module of producing this optical imagery I3 (promptly, the M=300 that it calculates), seemingly than in order to the quality (that is its M=280 that calculates) of this camera lens module of producing this optical imagery I4 for good.Yet, as the further focus value in four corners of this optical imagery I3: UR3 relatively again, UL3, DR3, DL3, focus value with four corners of this optical imagery I4: UR4, UL4, DR4 can find behind the DL4, in fact, the focus value in four corners of this optical imagery I3 is still presenting unbalanced phenomenon.So, in case behind this optical imagery I3, I4 the 3rd image analysis program in carrying out this second preferred embodiment respectively, can be found to the existence of this variability easily.In brief, in order to this camera lens module itself of producing this optical imagery I3 because of existing optical system error, so in fact the overall quality of its camera lens module not as overall quality in order to the camera lens module that produces this optical imagery I4.
Certainly,, can adjust the effect comparison sheet, make those skilled in the art that clearer understanding can be arranged by focusing shown in Figure 7 no matter be the concrete focusing adjustment effect of aforementioned of the present invention first or second embodiment.
Say again, suppose to carry out focusing adjustment of the present invention with 5 camera lens modules, and wherein be positioned at every data of row (L11, L12), comprise respectively in order to represent that first camera lens module is in the focus value that focuses on four corners adjusting forward and backward optical imagery: UL, UR, DR, DL adjusts data such as the variation value of forward and backward four jiaos of equal values of image and the number percent that makes a variation with resulting X value and Y value, four jiaos of equal value M of image and camera lens module behind this first image analysis program in the aforementioned focus value substitution of the present invention first or second preferred embodiment in focusing.In like manner, row (L21, L22), row (L31, L32), row (L41, L42), row (L51, L52) then are the related data of second to the 5th camera lens module.
For example, be example with second camera lens module, its focus value in four corners that focus on the optical imagery before adjusting is: 54,67,22,50.Afterwards, this microprocessor 25 shown in Fig. 3 can to calculate out X value and Y value, promptly be respectively-3.9 and 12.3 with this first image analysis program in this numerical value substitution of the present invention first or second preferred embodiment.Certainly, by aforesaid X value and Y value, can learn present residing inclination size of this second camera lens module and vergence direction.And then, again via this second image analysis program that carries out in of the present invention first or second preferred embodiment, can learn this second camera lens four jiaos of equal value M=48.5 of image at this moment.
If if, this microprocessor 25 shown in Fig. 3 is after the focus value and present residing inclination size and vergence direction in four corners judging this second camera lens module, think and adjust focusing effect in case of necessity, promptly can produce this mobile control signal S2 of output to this camera lens gripping tool 23, be arranged in the space orientation of this camera lens module 22 of this accommodation space 232 with adjustment according to its present residing inclination size and vergence direction.
Also be, when the location adjustment of carrying out this camera lens module 22 is moved, if the focus value in four corners of the optical imagery of this second camera lens module changes and becomes: 71,51,54,70, X value and Y value are respectively-9.1 and-0.3, four jiaos of equal value M of image of the optical imagery of this second camera lens become at 61.7 o'clock, can find that this second camera lens is respectively 13.21 and 27.27% in variation value that moves four jiaos of equal value M of forward and backward image and variation number percent.Certainly, because the change of the focus value in four corners of the optical imagery of this second camera lens module becomes comparatively average, and four jiaos of equal value M rise to 61.7 by 48.5, so be good before this second camera lens module through carrying out adjusted focusing effect, obviously will be adjusted.
In addition, because of the focus value of the 5th camera lens module in four corners that focus on the optical imagery before adjusting promptly is: 66,69,68,66, and four jiaos of equal value M of the image of its optical imagery also reach 67.2 (consult and indicate the L51 place among Fig. 7), so this little processing 25 can be selected it not to be carried out any focusing adjustment action.
In sum, the present invention obviously can provide a kind of can carry out the various dimensions adjustment, can distinguish that optical focus error produces the source, and can specifically assess the focusing regulation method that focuses on the adjustment effect; So the present invention has industrial value.
Those skilled in the art of the present invention appoints and executes that the craftsman thinks and be to modify as all, the scope of right neither disengaging claims institute desire protection.
Claims (12)
1, a kind of focusing regulation method of optical lens module comprises:
External light source is provided, after passing camera lens module, forms optical imagery;
Use full frame to focus on the focus value that algorithm obtains four corners of this optical imagery: UR, UL, DR, DL;
Carry out first image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all modifying factor; And
Be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery that described camera lens module produces.
2, the focusing regulation method of optical lens module according to claim 1, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
3, the focusing regulation method of optical lens module according to claim 1, wherein this method also comprises the following step:
Carry out second image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And
According to this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
4, the focusing regulation method of optical lens module according to claim 3, wherein this method also comprises the following step:
Carry out the 3rd image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR+UL+UR+DL); And
According to four jiaos of equal values of this image, whether arrived best homogenising with the focusing adjustment of judging this optical imagery.
5, a kind of focusing regulation method of optical lens module comprises:
External light source is provided, after passing camera lens module, forms optical imagery;
Use full frame to focus on the focus value that algorithm obtains four corners of this optical imagery: UR, UL, DR, DL;
Carry out first image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And
According to this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
6, the focusing regulation method of optical lens module according to claim 5, wherein this method also comprises the following step:
Carry out second image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all modifying factor; And
Be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery.
7, the focusing regulation method of optical lens module according to claim 6, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
8, the focusing regulation method of optical lens module according to claim 6, wherein this method also comprises the following step:
Carry out the 3rd image analysis program, to get four jiaos of equal value: M of image; Wherein, M=(DR+UL+UR+DL); And
According to four jiaos of equal values of this image, whether arrived best homogenising with the focusing adjustment of judging this optical imagery.
9, a kind of focusing regulation method of optical lens module comprises:
External light source is provided, after passing camera lens module, forms optical imagery;
Use full frame to focus on the focus value that algorithm obtains four corners of this optical imagery: UR, UL, DR, DL;
Carry out first image analysis program, to obtain four jiaos of equal value: M of image; Wherein, M=(DR+UL+UR+DL); And
According to four jiaos of equal values of this image, whether arrived best homogenising with the focusing adjustment of judging this optical imagery.
10, the focusing regulation method of optical lens module according to claim 9, wherein this method more comprises the following step:
Carry out second image analysis program, be tilted to value to obtain two-dimensional geometry: T (X, Y); Wherein,
And X=((DR+UR)-(UL+DL))/b, Y=((UR+UL)-(DR+DL))/a, a, b are all modifying factor; And
Be tilted to value according to this two-dimensional geometry, adjusting the tilt phenomenon of this camera lens module, thereby improve the even focusing effect of this optical imagery.
11, the focusing regulation method of optical lens module according to claim 10, wherein this modifying factor a, b are respectively 3,4, or are respectively 4,3.
12, the focusing regulation method of optical lens module according to claim 10, wherein this method also comprises the following step:
Carry out the 3rd image analysis program, to obtain image diagonal angle spinor value: D; Wherein, D=(DR+UL)-(UR+DL); And
According to this image diagonal angle spinor value, to judge the optical system error of this camera lens module.
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| CNB2005101088595A CN100465783C (en) | 2005-10-09 | 2005-10-09 | Focusi regulating method for optical image |
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| CNB2005101088595A CN100465783C (en) | 2005-10-09 | 2005-10-09 | Focusi regulating method for optical image |
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| Publication Number | Publication Date |
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| CN1945427A CN1945427A (en) | 2007-04-11 |
| CN100465783C true CN100465783C (en) | 2009-03-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017101854A1 (en) | 2015-12-16 | 2017-06-22 | 宁波舜宇光电信息有限公司 | Method for compensating imaging quality of optical system by adjusting lens |
| CN105487248B (en) * | 2015-12-16 | 2018-11-23 | 宁波舜宇光电信息有限公司 | The compensation method of optical system imaging quality is realized by adjusting eyeglass |
Citations (6)
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|---|---|---|---|---|
| US4782474A (en) * | 1985-01-31 | 1988-11-01 | Fujitsu Limited | Tracking servo system for controllably projecting an optical beam on an optical disk |
| US5691765A (en) * | 1995-07-27 | 1997-11-25 | Sensormatic Electronics Corporation | Image forming and processing device and method for use with no moving parts camera |
| US6359650B1 (en) * | 1994-12-28 | 2002-03-19 | Canon Kabushiki Kaisha | Electronic camera having a tilt detection function |
| CN1374556A (en) * | 2001-03-09 | 2002-10-16 | 奥林巴斯光学工业株式会社 | Focus regulating method for photographic lens |
| US20030117514A1 (en) * | 2001-12-21 | 2003-06-26 | Jonathan Weintroub | Method and apparatus for detecting optimum lens focus position |
| US20050058030A1 (en) * | 2003-09-12 | 2005-03-17 | Hanks Darwin Mitchel | Optical disk drive focusing apparatus |
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2005
- 2005-10-09 CN CNB2005101088595A patent/CN100465783C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4782474A (en) * | 1985-01-31 | 1988-11-01 | Fujitsu Limited | Tracking servo system for controllably projecting an optical beam on an optical disk |
| US6359650B1 (en) * | 1994-12-28 | 2002-03-19 | Canon Kabushiki Kaisha | Electronic camera having a tilt detection function |
| US5691765A (en) * | 1995-07-27 | 1997-11-25 | Sensormatic Electronics Corporation | Image forming and processing device and method for use with no moving parts camera |
| CN1374556A (en) * | 2001-03-09 | 2002-10-16 | 奥林巴斯光学工业株式会社 | Focus regulating method for photographic lens |
| US20030117514A1 (en) * | 2001-12-21 | 2003-06-26 | Jonathan Weintroub | Method and apparatus for detecting optimum lens focus position |
| US20050058030A1 (en) * | 2003-09-12 | 2005-03-17 | Hanks Darwin Mitchel | Optical disk drive focusing apparatus |
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