CN106842488A - The focusing method of camera module - Google Patents
The focusing method of camera module Download PDFInfo
- Publication number
- CN106842488A CN106842488A CN201710102543.8A CN201710102543A CN106842488A CN 106842488 A CN106842488 A CN 106842488A CN 201710102543 A CN201710102543 A CN 201710102543A CN 106842488 A CN106842488 A CN 106842488A
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- China
- Prior art keywords
- focusing
- camera module
- object distance
- target
- lens
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
Abstract
The invention provides a kind of focusing method of camera module, the method comprises the following steps：The camera module of focusing to be assembled is provided, and the focusing table of the camera module is provided, target focusing object distance is d1；Pre-assembled focusing, completes the first focusing of pre-focusing position d2；The corresponding camera lens shift values of pre-focusing object distance d2 and target focusing object distance d1 are gone out by the focusing table search；Calculate the anglec of rotation A of the barrel；By the lens base or rotation of lens A angles, target focusing is completed.Compared with correlation technique, the focusing method low production cost of the camera module that the present invention is provided, focusing precision is high and wide using scope.
Description
【Technical field】
The present invention relates to field of optical lens, more particularly to a kind of focusing method of camera module.
【Background technology】
With continuing to develop for science and technology, electronic equipment is portable in addition to digital camera constantly towards intelligent development
Electronic equipment such as panel computer, mobile phone etc. are also provided with the camera module of camera function of taking pictures, and are clapped at any time with meeting user
According to the need for.
The camera module of correlation technique includes barrel and the camera lens module being arranged in the barrel, for related skill
The camera module in art, it is fixed focal length, and shooting style when being used with life in production is identical, i.e., remote in fixation
The test chart or resolution chart of a standard are set on position, it is correct to being adjusted to by the barrel for rotating the camera module
Focusing position.
However, when focal distance requires the short distance in 1.5cm to 4.0cm, above-mentioned focusing mode cannot then be realized, a side
Face is difficult to find that the test chart of standard, focusing instrument on the other hand cannot be put between the distance and be focused.If input is complicated
Assembling equipment can solve the above problems, but production cost is high.
Therefore, it is necessary to provide a kind of focusing method of new camera module solve the above problems.
【The content of the invention】
It is an object of the invention to provide a kind of low production cost, focusing precision is high and uses the wide camera module of scope
Focusing method.
In order to solve the above technical problems, the invention provides a kind of focusing method of camera module, the method includes as follows
Step：
The camera module of focusing to be assembled, including lens base and the camera lens being contained in the lens base, institute are provided
The target focusing object distance of camera module is stated for d1, and the focusing table of the camera module is provided；
Pre-assembled focusing, the focusing position of the pre-focusing object distance d2 of the camera module is adjusted by fixed focal length focusing mode
Put, complete just focusing；
The camera module is gone out in the corresponding camera lens shift value s2 of the pre-focusing object distance d2 by the focusing table search；
The camera module is gone out in the corresponding camera lens shift values of the target focusing object distance d1 by the focusing table search
s1；
Anglec of rotation A is calculated, A is met：
A=360 ° × (s2-s1)/h
Wherein, h is the displacement of the optical axis direction that the camera lens or the lens base rotate a circle；
According to the focusing table, determine the camera lens translation direction of the target focusing object distance, by the lens base or
The rotation of lens A angles, make the camera module be located at the position of the target focusing object distance d1, complete the camera module
Focusing.
Preferably, the target focusing object distance d1 is less than the pre-focusing object distance d2.
Preferably, the target focusing object distance d1 meets 1.5cm≤d1≤4cm.
Preferably, the pre-focusing object distance d2 meets d2 ＞ 4cm.
Preferably, the target focusing object distance d1=2cm.
Preferably, the pre-focusing object distance d2=20cm.
Preferably, the displacement h=0.2mm of the optical axis direction that the barrel rotates a circle.
Compared with correlation technique, the focusing method of the camera module that the present invention is provided calculated during camera module by being designed
Go out its focusing table, first complete pre-focusing of the focusing object distance more than 4.0cm and adjust, by the reference of table of focusing, then rotate regulation mirror
Head cylinder makes its correspondence realize that short distance is focused in the position of target focusing object distance, and the method need not increase extra assembling equipment can
The short distance scope that focusing object distance requirement is completed in 1.5cm~4.0cm is focused, not only low cost, and focusing precision is high, meanwhile,
The focusing method of the camera module is wide using scope, not by short restricted of focusing object distance.
【Brief description of the drawings】
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is the FB(flow block) of the focusing method of camera module of the present invention；
Fig. 2 is a kind of structural representation of pre-focusing object distance focusing state of camera module of the present invention；
Fig. 3 is a kind of structural representation of target focusing object distance focusing state of camera module of the present invention.
【Specific embodiment】
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig. 1-3, wherein, Fig. 1 is the FB(flow block) of the focusing method of camera module of the present invention；Fig. 2 is this
A kind of structural representation of the pre-focusing object distance focusing state of invention camera module；Fig. 3 is a kind of mesh of camera module of the present invention
Mark the structural representation of focusing object distance focusing state.The invention provides a kind of focusing method of camera module, the method includes
Following steps：
Step S1, the camera module 100 that focusing to be assembled is provided, including lens base 1 and it is contained in the lens base 1
Interior camera lens 2.The target focusing object distance of the camera module 100 is d1, and provides the focusing table of the camera module, such as following table
Shown in 1.
In present embodiment, wherein, so that the target focusing object distance d1 meets 1.5cm≤d1≤4cm as an example, specifically,
Illustrated by taking the target focusing object distance d1=2cm as an example.
The focusing table of the camera module of table 1
Step S2, pre-assembled focusing, the pre-focusing object distance d2 of the camera module 100 is adjusted by fixed focal length focusing mode
Focusing position, complete just focusing.Wherein, the target focusing object distance d1 is less than the pre-focusing object distance d2.
During because of the situation for being more than 4.0cm when the focusing object distance, the test image of standard can be found and in the focusing object distance
Between be put into focusing instrument and focused, therefore can be used fixed focal length focusing mode to be focused, i.e., traditional focusing mode.
In present embodiment, d2 is met with the pre-focusing object distance d2>Illustrated as a example by 4.0cm, be certainly not limited to this.
Specifically, being illustrated by taking the pre-focusing object distance d2=20cm as an example.
Step S3, to find out the camera module 100 by the focusing table table 1 corresponding in the pre-focusing object distance d2
Camera lens shift value s2.
As shown in Table 1, during pre-focusing object distance d2=20cm, corresponding camera lens shift value s2=-0.011mm.
Step S4, found out by the focusing table table 1 the camera module 100 the target focusing object distance d1 correspondence
Camera lens shift value s1.
As shown in Table 1 during target focusing object distance d1=2cm, corresponding camera lens shift value s1=-0.119mm.
Therefore, can calculate from pre-focusing object distance 20cm be changed into the focusing of target focusing object distance 2cm when, only need to be by the camera lens
Module moves the distance of s2-s1, will described camera lens module movement -0.011- (- 0.119)=0.108mm.
Step S5, calculating anglec of rotation A, meet A：
A=360 ° × (s2-s1)/h,
Wherein, h be the camera lens 2 or the lens base 1 rotate a circle 360 ° optical axis direction displacement.
In present embodiment, illustrated by taking 360 ° of the displacement h=0.2mm of rotating a circle as an example.I.e. described camera lens 2
Or the anglec of rotation of the lens base 1：
A=360 ° × [- 0.011- (- 0.119)]/0.2=194 °.
Step S6, according to the focusing table, the translation direction of camera lens 2 of the target focusing object distance is determined, when the value of s2-s1
It is positive number, then to thing side shifting, if negative, then the camera lens 2 is moved the camera lens 2 to image side.By the lens base 1 or
The camera lens 2 rotates A angles, makes the camera lens 2 to thing side shifting, that is, rotating 194 ° makes the camera module 100 as shown in Figure 2
Status adjustment is state shown in Fig. 3, the camera module 100 is located at the position of the target focusing object distance d1=2cm, is completed
The focusing of the camera module 100.
It should be noted that in the present invention, the lens base 1 is helicitic texture, the camera lens 2 and the lens base
1 is threaded.
Compared with correlation technique, the focusing method of the camera module that the present invention is provided calculated during camera module by being designed
Go out its focusing table, first complete pre-focusing of the focusing object distance more than 4.0cm and adjust, by the reference of table of focusing, then rotate regulation mirror
Head cylinder makes its correspondence realize that short distance is focused in the position of target focusing object distance, and the method need not increase extra assembling equipment can
The short distance scope that focusing object distance requirement is completed in 1.5cm~4.0cm is focused, not only low cost, and focusing precision is high, meanwhile,
The focusing method of the camera module is wide using scope, not by short restricted of focusing object distance.
Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to protection model of the invention
Enclose.
Claims (7)
1. a kind of focusing method of camera module, it is characterised in that the method comprises the following steps：
The camera module of focusing to be assembled, including lens base and the camera lens being contained in the lens base, the phase are provided
The target focusing object distance of machine module is d1, and provides the focusing table of the camera module；
Pre-assembled focusing, the focusing position of the pre-focusing object distance d2 of the camera module is adjusted by fixed focal length focusing mode, complete
Into just focusing；
The camera module is gone out in the corresponding camera lens shift value s2 of the pre-focusing object distance d2 by the focusing table search；
The camera module is gone out in the corresponding camera lens shift value s1 of the target focusing object distance d1 by the focusing table search；
Anglec of rotation A is calculated, A is met：
A=360 ° × (s2-s1)/h
Wherein, h is the displacement of the optical axis direction that the camera lens or the lens base rotate a circle；
According to the focusing table, the camera lens translation direction of the target focusing object distance is determined, by the lens base or described
Rotation of lens A angles, make the camera module be located at the position of the target focusing object distance d1, complete the right of the camera module
It is burnt.
2. the focusing method of camera module according to claim 1, it is characterised in that the target focusing object distance d1 is less than
The pre-focusing object distance d2.
3. the focusing method of camera module according to claim 2, it is characterised in that the target focusing object distance d1 meets
1.5cm≤d1≤4cm。
4. the focusing method of camera module according to claim 3, it is characterised in that the pre-focusing object distance d2 meets d2
＞ 4cm.
5. the focusing method of camera module according to claim 4, it is characterised in that the target focusing object distance d1=
2cm。
6. the focusing method of camera module according to claim 5, it is characterised in that the pre-focusing object distance d2=
20cm。
7. the focusing method of camera module according to claim 6, it is characterised in that the light that the barrel rotates a circle
The displacement h=0.2mm of direction of principal axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102543.8A CN106842488A (en) | 2017-02-24 | 2017-02-24 | The focusing method of camera module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102543.8A CN106842488A (en) | 2017-02-24 | 2017-02-24 | The focusing method of camera module |
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| CN106842488A true CN106842488A (en) | 2017-06-13 |
Family
ID=59134111
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| CN201710102543.8A Pending CN106842488A (en) | 2017-02-24 | 2017-02-24 | The focusing method of camera module |
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Citations (8)
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| US4397528A (en) * | 1980-07-21 | 1983-08-09 | Canon Kabushiki Kaisha | Zoom lens assembly with single operational member and means to prohibit defocussing while zooming |
| JPH05164957A (en) * | 1991-12-16 | 1993-06-29 | Canon Inc | Zoom lens barrel |
| CN103376615A (en) * | 2012-04-24 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Automatic focusing device and automatic focusing method |
| CN103546692A (en) * | 2013-11-04 | 2014-01-29 | 苏州科达科技股份有限公司 | Method and system achieving integrated camera automatic focusing |
| CN104836954A (en) * | 2015-04-23 | 2015-08-12 | 金三立视频科技（深圳）有限公司 | Zooming tracking method and apparatus |
| CN105100617A (en) * | 2015-07-28 | 2015-11-25 | 深圳市万普拉斯科技有限公司 | Focusing control method for imaging equipment, and imaging device |
| CN105807386A (en) * | 2016-05-27 | 2016-07-27 | 乐视控股（北京）有限公司 | Lens installation method and device, and terminal |
| CN106104352A (en) * | 2014-03-31 | 2016-11-09 | 富士胶片株式会社 | Zoom lens apparatus and control method thereof |
-
2017
- 2017-02-24 CN CN201710102543.8A patent/CN106842488A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397528A (en) * | 1980-07-21 | 1983-08-09 | Canon Kabushiki Kaisha | Zoom lens assembly with single operational member and means to prohibit defocussing while zooming |
| JPH05164957A (en) * | 1991-12-16 | 1993-06-29 | Canon Inc | Zoom lens barrel |
| CN103376615A (en) * | 2012-04-24 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Automatic focusing device and automatic focusing method |
| CN103546692A (en) * | 2013-11-04 | 2014-01-29 | 苏州科达科技股份有限公司 | Method and system achieving integrated camera automatic focusing |
| CN106104352A (en) * | 2014-03-31 | 2016-11-09 | 富士胶片株式会社 | Zoom lens apparatus and control method thereof |
| CN104836954A (en) * | 2015-04-23 | 2015-08-12 | 金三立视频科技（深圳）有限公司 | Zooming tracking method and apparatus |
| CN105100617A (en) * | 2015-07-28 | 2015-11-25 | 深圳市万普拉斯科技有限公司 | Focusing control method for imaging equipment, and imaging device |
| CN105807386A (en) * | 2016-05-27 | 2016-07-27 | 乐视控股（北京）有限公司 | Lens installation method and device, and terminal |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170613 |