CN1268958C - Method for adjusting lens relative position using uniform light source - Google Patents
Method for adjusting lens relative position using uniform light source Download PDFInfo
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- CN1268958C CN1268958C CN03127738.1A CN03127738A CN1268958C CN 1268958 C CN1268958 C CN 1268958C CN 03127738 A CN03127738 A CN 03127738A CN 1268958 C CN1268958 C CN 1268958C
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Abstract
The present invention provides a method for regulating the relative position of a lens by utilizing a uniform light source. A lens module comprises a back board, an image sensor, an adjustment module and the lens, wherein the image sensor is connected to the back board and is perpendicular to the optical axis of the uniform light source; the lens can be movably arranged in the front of the image sensor, and is connected with the back board through the adjustment module; the image sensor in the lens module is electrically connected to a processing module, and the processing module is simultaneously electrically connected with the adjustment module in the lens module. The present invention at least comprises the following steps: (a) respectively extracting a specific signal produced in a corresponding specific area of the image sensor; (b) using the processing module to process the specific signal to obtain the adjustment quantity; (c) adjusting the position of the lens relative to the optical detection component by selectively using the adjustment module according to the adjustment quantity.
Description
Technical field
The present invention relates to a kind of method of utilizing uniform source of light to adjust relative position of lens.
Background technology
The principle of digital camera be with image see through lens imaging image sensor (as complementary metal oxide semiconductor, CMOS or sensitization coupling unit, CCD) on, become electronic signal to be stored image transitions again.Because the effective sensitization area on the image sensor is less, thus need make camera lens optical axis centrally aligned photosensitive region central authorities in use, and the optical axis of camera lens needs perpendicular to the effectively imaging of image sensor ability.Therefore, how making the relative position of camera lens and alignment image sensor is the important key of guaranteeing image quality.
The existing assembling mode of digital camera is to utilize the parts of volume production to assemble with existing locator meams (cooperating or the spiral cooperation as positioning shaft hole).Except that the tolerance on fit that is produced, be overall assembly error after adding the dimensional tolerence of each parts.Because in the assembling process, via can causing overall tolerance excessive after the tolerance stack, and then influence the image quality of digital camera.
Can't effectively control the problem of overall tolerance for solving prior art, the invention provides a kind of method of effectively controls lens module assembling global error.Utilize the test of uniform source of light, correction and adjustment before assembling can effectively be controlled global error, and then guarantee the image quality of digital camera.
Summary of the invention
Main aspect of the present invention is providing a kind of method of utilizing uniform source of light to adjust relative position of lens, the global error that is produced when assembling with effective controls lens module.
Method of the present invention comprises following steps at least: (a) be extracted from the corresponding signal specific that produces in specific region on the image sensor respectively; (b) obtain an adjustment amount after this signal specific of treated resume module; And (c) according to this adjustment amount, optionally by the relative position between adjusting module adjustment camera lens and image sensor.
Adopting assemble method of the present invention, except the time that can save the individual parts adjustment, determine before more can directly in the end assembling that camera lens module is positioned at optimal position, and then guarantee the image quality of digital picture product, is to serve multiple.
Description of drawings
Fig. 1 a is a camera lens module synoptic diagram of the present invention;
Fig. 1 b is the synoptic diagram of specific region on the image sensor of the present invention;
Fig. 2 a adjusts the camera lens module method flow diagram for utilizing uniform source of light;
Fig. 2 b is another embodiment process flow diagram of the inventive method;
Fig. 3 a is an embodiment synoptic diagram in specific region on the image sensor;
Fig. 3 b is another embodiment synoptic diagram of specific region on the image sensor.
Embodiment
At first Reference numeral is described as follows: 100 camera lens modules, 101 image sensors (imagesensor), 103 backboards, 105 camera lenses, 107 adjusting modules, 109 processing modules, 111 uniforms source of light, 11 signal specific, 13 adjustment amounts, 15 lens set, 17 Knockdown blocks, 113 first areas, 115 second areas, 117 the 3rd zones, 301 first areas, 303 second areas, 305 the 3rd zones, 307 first areas, 309 second areas, 311 the 3rd zones, 313 the 4th zones.
The invention provides a kind of method of utilizing uniform source of light to adjust relative position of lens.Preferred embodiment of the present invention is a digital camera, and also applicable other any needs carry out in the device of camera lens module assembling.
Fig. 1 a is a camera lens module synoptic diagram of the present invention.As shown in Figure 1a, camera lens module 100 includes image sensor 101, backboard 103, camera lens 105 and adjusting module 107.Image sensor 101 is connected on the backboard 103 and is vertical with the optical axis of uniform source of light 111.Image sensor 101 is made up of a plurality of pixel.At least include three specific regions on the image sensor 101, comprise at least one pixel in each specific region respectively.Embodiment shown in Fig. 1 b, the specific region is first area 113, second area 115 and the 3rd zone 117.The specific region is accepted to produce specific signal corresponding 11 by behind the uniform light of camera lens 105.In the embodiment shown in Fig. 1 b, first area 113, the corresponding respectively uniform light of second area 115 and the 3rd zone 117 and produce first signal, secondary signal and the 3rd signal.Signal specific 11 among the present invention can be the illumination intensity signal that is come by the induction of light illumination or the green optical signal, the blue light signal red signal light that are come by the light color induction.
As shown in Figure 1a, backboard 103 is connected with camera lens 105 by adjusting module 107, and camera lens 105 is arranged at the place ahead of image sensor 101 movably.Processing module 109 is connected with electric with image sensor 101 and adjusting module 107 respectively, the function of processing module 109 is for judging that by signal specific 11 whether the camera lens 105 and the relative position of image sensor 101 need be adjusted, and then calculate adjustment amount 13 and are sent to adjusting module 107 according to signal specific 11 if need to adjust.The bolt group (screw set) that can provide two dimension to adjust function is provided the adjusting module 107 of preferred embodiment of the present invention.This bolt group can manual or automatic mode, adjusts the degree of tightness of appropriate location bolt and adjusts the relative position of 105 on image sensor 101 and camera lens.
Shown in Fig. 2 a, method of the present invention comprises three steps at least: step 21 is positioned at this corresponding signal specific 11 photosensitive-members that produce in specific zone for being extracted from respectively.Step 23 is to obtain adjustment amount 13 after processing module 109 is handled signal specific 11.Step 25 is according to adjustment amount 13, optionally passes through the relative position of 101 of adjusting module 107 adjustment camera lenses 105 and photosensitive-member image sensors.
Fig. 2 b utilizes uniform source of light to adjust the process flow diagram of another embodiment of the method for relative position of lens.In this embodiment, before adjusting, be about to camera lens module 100 earlier assemble in advance, and open the uniform light that uniform source of light 111 is accepted by camera lens 105 image sensor 101.Shown in Fig. 2 b, step 201 is to extract the signal specific 11 that produces in the specific region correspondence on the image sensor 101 respectively, and signal specific 11 is sent to processing module 109.Step 202 judges whether and need adjust by signal specific 11 for processing module 109.When the absolute value of the maximum in the signal specific 11 and reckling difference less than one during with reference to the tolerable value of experience or production cost decision, then need not to adjust and can be directly finish fixing assembling to step 207.Otherwise,, then represent and need adjust and the step 203 that arrives if when the absolute value of the maximum and reckling difference is greater than the tolerable value in the signal specific 11.Step 203 is to obtain adjustment amount 13 after processing module 109 is handled signal specific 11.Step 205 is optionally passed through the relative position of 101 of adjusting module 107 adjustment camera lenses 105 and image sensors according to adjustment amount 13.Test through returning step 201 after step 205 adjustment.After treating judgement, can carry out the fixedly assembly working that step 207 is finished camera lens module 100 by step 202.Yet in other embodiments, also can after the adjustment of carrying out step 205, promptly carry out last steady job.
Fig. 3 a is the synoptic diagram of the specific region on the image sensor.The specific region is first area 301, second area 303 and the 3rd zone 305 of range image sensor 101 geometric centers equidistant (distance is R) in the present embodiment.Image sensor 101 is accepted by behind the uniform light of camera lens 105, in the first area 301, second area 303 responds to first signal, secondary signal and the 3rd signal of generation respectively and be sent to processing module 109 with the 3rd zone 305.If image sensor 101 is suitable with the relative position of camera lens 105, then first signal, secondary signal and the 3rd signal should have identical numerical value.If first signal, secondary signal and the 3rd number of signals value difference are different excessive, then need adjust.Preferred embodiment is for to determine a tolerable value according to operating experience or cost consideration, when the difference of the maximum and reckling in first signal, secondary signal and the 3rd signal then need be adjusted during greater than this tolerable value.The calculating of adjustment amount 13 is to get according to appointing the difference of getting between the two to calculate in first signal, secondary signal and the 3rd signal.Shown in Fig. 3 a, choose first signal earlier and compare with secondary signal, if first signal, represents that first area 301 is nearer with the relative distance of camera lens 105 greater than secondary signal, should adjust.The adjustment mode be with by image sensor plane, 101 place and and the perpendicular straight line of the on line of 303 of first area 301 and second areas be axle, utilize adjusting module 107 to adjust with rotation mode.After adjusting according to two signals of preceding method alternative, can get the adjustment amount 13 of another rotation dimension.Through two dimension rotation be adjusted to satisfy the check of tolerable value after, can guarantee that image sensor 101 and camera lens 105 have suitable relative position.
Fig. 3 b is another embodiment synoptic diagram of image sensor 101 and specific region.The specific region is the equidistant first area 307 of range image sensor 101 geometric centers, second area 309, the 311 and the 4th zone 313, the 3rd zone in the present embodiment.Wherein the on line in the on line in first area 307 and the 3rd zone 311 and second area 309 and the 4th zone 313 is orthogonal and intersect at the geometric center of image sensor 101.Image sensor 101 is accepted by behind the uniform light of camera lens 105, in the first area 307, second area 309, the 311 and the 4th zone 313, the 3rd zone respond to first signal, secondary signal, the 3rd signal and the 4th signal of generation respectively and be sent to processing module 109.If image sensor 101 is suitable with the relative position of camera lens 105, then first signal, secondary signal, the 3rd signal and the 4th signal should have identical numerical value.If first signal, secondary signal, the 3rd signal and the 4th number of signals value difference are different excessive, then need adjust.Preferred embodiment is for to determine a tolerable value according to operating experience or cost consideration, when the difference of the maximum and reckling in first signal, secondary signal, the 3rd signal and the 4th signal then need be adjusted during greater than this tolerable value.The calculating of adjustment amount 13 is to get according to appointing the difference of getting between the two to calculate in first signal, secondary signal, the 3rd signal and the 4th signal.Shown in Fig. 3 b, choose first signal earlier and compare with the 3rd signal, if first signal, represents that first area 307 is nearer with the relative distance of camera lens 105 greater than the 3rd signal, should adjust.The adjustment mode be with by image sensor plane, 101 place and and the perpendicular straight line of 311 the on line in first area 307 and the 3rd zone be axle, utilize adjusting module 107 to adjust with rotation mode.The size that compares secondary signal and the 4th signal again, adjustment of adjusting another rotation dimension according to preceding method has suitable relative position to guarantee image sensor 101 and camera lens 105.The special area configuration mode of present embodiment is positioned at four corners of image sensor 101, and the turning axle that two dimension is adjusted is fixing, helps shortening the time of work for inspection and the operation of automated production flow process.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and above-mentioned disclosed preferred embodiment is not the restriction to scope of the present invention.On the contrary, the above-mentioned explanation and the arrangement of various change and isotropism all are the categories that the present invention will be protected.Therefore, the category of the claim that the present invention applied for should be done the broadest explanation according to above-mentioned explanation, and contains the change that institute might equalization and the arrangement of tool isotropism.
Claims (21)
1. method of utilizing uniform source of light to adjust the relative position of lens in the camera lens module, this camera lens module comprises backboard, image sensor, adjusting module and camera lens, this image sensor is connected on this backboard and is vertical with the optical axis of this uniform source of light, this image sensor is made up of a plurality of pixel, further include the first area that respectively geometric center of this image sensor is had identical distance on this image sensor, second area and the 3rd zone, this first area, comprise at least one pixel respectively in this second area and the 3rd zone, this camera lens is arranged at this image sensor the place ahead movably, this camera lens connects this backboard by this adjusting module, this image sensor electric is connected to a processing module, and this processing module electric is connected to this adjusting module, and this method comprises following steps at least:
(a) be extracted in respectively corresponding first signal that produces in this first area, in the corresponding secondary signal that produces of this second area and at corresponding the 3rd signal that produces in the 3rd zone;
(b) this processing module is handled this first signal, this secondary signal and the 3rd signal and is obtained an adjustment amount; And
(c), optionally adjust relative position between this camera lens and this image sensor by this adjusting module according to this adjustment amount.
2. the method for claim 1 wherein obtains this adjustment amount according to appointing the difference of getting between the two to calculate in this first signal, this secondary signal and the 3rd signal.
3. method as claimed in claim 2, wherein when the absolute value of this difference during greater than a tolerable value, this adjusting module is adjusted according to this adjustment amount.
4. the method for claim 1, wherein the difference according to the maximum and reckling in this first signal, this secondary signal and the 3rd signal calculates this adjustment amount.
5. the method for claim 1, wherein this adjusting module is adjusted relative position between this camera lens and this image sensor in the mode of two dimension rotation.
6. the method for claim 1, wherein this camera lens comprises lens set and Knockdown block, and this Knockdown block connects this lens set and this backboard adjustably.
7. the method for claim 1, wherein the bolt group that can provide two dimension to adjust is provided this adjusting module.
8. the method for claim 1, wherein this first signal, this secondary signal, comprise illumination intensity signal respectively with the 3rd signal.
9. the method for claim 1, wherein this first signal, this secondary signal, comprise green optical signal respectively with the 3rd signal.
10. method of utilizing uniform source of light to adjust the relative position of lens in the camera lens module, this camera lens module comprises backboard, image sensor, adjusting module and camera lens, this image sensor is connected on this backboard and is vertical with the optical axis of this uniform source of light, this image sensor is made up of a plurality of pixel, further include the first area that respectively geometric center of this image sensor is had identical distance on this image sensor, second area, the 3rd zone and the 4th zone, this first area, this second area, comprise at least one pixel respectively in the 3rd zone and the 4th zone, this camera lens is arranged at this image sensor the place ahead movably, this camera lens connects this backboard by this adjusting module, this image sensor electric is connected to a processing module, and this processing module electric connects this adjusting module, and this method comprises following steps at least:
(a) be extracted in respectively corresponding first signal that produces in this first area, in the corresponding secondary signal that produces of this second area, at corresponding the 3rd signal that produces in the 3rd zone and at corresponding the 4th signal that produces in the 4th zone;
(b) this processing module is handled this first signal, this secondary signal, the 3rd signal and the 4th signal and is obtained an adjustment amount; And
(c), optionally adjust relative position between this camera lens and this image sensor by this adjusting module according to this adjustment amount.
11. method as claimed in claim 10, wherein the on line in this first area and the 3rd zone and this second area and this four-range on line are passed through this image sensor geometric center respectively, and this two on line is vertical mutually.
12. method as claimed in claim 10 is wherein calculated according to the difference of this first signal and the 3rd signal and is obtained this adjustment amount.
13. method as claimed in claim 12, wherein if the absolute value of this difference greater than a tolerable value, this adjusting module will be adjusted according to this adjustment amount.
14. method as claimed in claim 10 wherein obtains this adjustment amount according to appointing the difference of getting between the two to calculate in this first signal, this secondary signal, the 3rd signal and the 4th signal.
15. method as claimed in claim 14, wherein if this difference greater than a tolerable value, this adjusting module will be adjusted according to this adjustment amount.
16. method as claimed in claim 10, wherein the difference according to the maximum and reckling in this first signal, this secondary signal, the 3rd signal and the 4th signal calculates this adjustment amount.
17. method as claimed in claim 10, wherein this adjusting module is adjusted relative position between this camera lens and this image sensor in the mode of two dimension rotation.
18. method as claimed in claim 10, wherein this camera lens comprises lens set and Knockdown block, and this Knockdown block connects this lens set and this backboard adjustably.
19. method as claimed in claim 10, wherein the bolt group that can provide two dimension to adjust is provided this adjusting module.
20. method as claimed in claim 11, wherein this first signal, this secondary signal, the 3rd signal and the 4th signal are illumination intensity signals.
21. method as claimed in claim 11, wherein this first signal, this secondary signal, the 3rd signal and the 4th signal are green optical signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03127738.1A CN1268958C (en) | 2003-08-13 | 2003-08-13 | Method for adjusting lens relative position using uniform light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03127738.1A CN1268958C (en) | 2003-08-13 | 2003-08-13 | Method for adjusting lens relative position using uniform light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580851A CN1580851A (en) | 2005-02-16 |
| CN1268958C true CN1268958C (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN03127738.1A Expired - Fee Related CN1268958C (en) | 2003-08-13 | 2003-08-13 | Method for adjusting lens relative position using uniform light source |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329434B (en) * | 2007-06-18 | 2010-04-07 | 鸿富锦精密工业（深圳）有限公司 | Camera module group combined method |
| US8547439B2 (en) * | 2012-02-23 | 2013-10-01 | Apple Inc. | Testing an optical characteristic of a camera component |
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2003
- 2003-08-13 CN CN03127738.1A patent/CN1268958C/en not_active Expired - Fee Related
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