CN107071400A - A kind of optical centre measuring system of wide-angle imaging module - Google Patents
A kind of optical centre measuring system of wide-angle imaging module Download PDFInfo
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- CN107071400A CN107071400A CN201710399783.9A CN201710399783A CN107071400A CN 107071400 A CN107071400 A CN 107071400A CN 201710399783 A CN201710399783 A CN 201710399783A CN 107071400 A CN107071400 A CN 107071400A
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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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Abstract
The application provides a kind of optical centre measuring system of wide-angle imaging module, including：Spherical source, wide-angle imaging module and computer；The spherical source is internally provided with spherical cavity；The wide-angle imaging module is arranged in the spherical cavity, the picture for shooting the light received；The computer is used to analyze the picture and confirms the optical centre of the wide-angle imaging module.Due to being illuminated in the present invention using spherical source, the visual field of wide-angle imaging module can be completely covered in the spherical source, uniform photoenvironment is formed in the visual field of wide-angle imaging module, so that wide-angle imaging module shoots the picture for obtaining meeting optical centre measurement, and then improve the accuracy of measurement of the optical centre of wide-angle imaging module.The accuracy of measurement of optical centre skew amount can also be improved.
Description
Technical field
The present invention relates to camera technology field, more particularly to a kind of optical centre measuring system of wide-angle imaging module.
Background technology
With the development of camera module, in order to obtain the bigger angle of visual field, wide-angle imaging module arises at the historic moment, its angle of visual field
Typically larger than 100 °, the application of wide-angle imaging module is more and more extensive.Wide-angle imaging module includes wide-angle lens and optical sensing
Device, generally, the camera lens of wide-angle imaging module project photosensitive region of the region less than optical sensor of optical sensor, because
This, the round edge of the figure of wide-angle imaging module formation is the exterior contour of camera lens, is circle.
Optical centre skew amount refers to the skew between the optical centre of camera module and the optical centre of optical sensor
Amount.With the continuous lifting that user is required image quality, obtaining effect better image turns into the requirements at the higher level of user.Cause
This, accurately measures optical centre skew amount in camera module process of producing product or during use, could be follow-up
Purposive elimination or weakening optical centre skew during use, so as to reduce because above-mentioned two optical centre is misaligned
The phenomenon of caused image aberration and brightness irregularities.
Optical centre detection method is in the prior art：A pictures are shot under uniform source of light using camera module, profit
The most bright spot for obtaining picture epigraph with software calculating is used as the optical centre of camera module.But above-mentioned optical centre detection method
When being applied to wide-angle imaging module, it may appear that the problem of measurement of wide-angle imaging module optical centre is inaccurate.
Therefore, needing badly a kind of can improve the measurement apparatus of wide-angle imaging module optical centre accuracy of measurement.
The content of the invention
In view of this, the present invention provides a kind of optical centre measuring system of wide-angle imaging module, to solve prior art
The problem of optical centre detection of middle wide-angle imaging module is inaccurate.
To achieve the above object, the present invention provides following technical scheme：
A kind of optical centre measuring system of wide-angle imaging module, including：
Spherical source, wide-angle imaging module and computer；
The spherical source is internally provided with spherical cavity；
The wide-angle imaging module is arranged in the spherical cavity, the picture for shooting the light received；
The computer is used to analyze the picture and confirms the optical centre of the wide-angle imaging module.
Preferably, the wide-angle imaging module include wide-angle camera, the entrance pupil position of the wide-angle camera with it is described
The distance between sphere center position of spherical cavity is less than or equal to the 10% of the radius of the spherical cavity.
Preferably, the entrance pupil of the wide-angle camera is located at the sphere center position of the spherical cavity.
Preferably, the luminosity and light emission color temperature of the spherical source are adjustable.
Preferably, the brightness range of the entrance pupil position of the wide-angle camera is 0lx~20000lx, including 20000lx.
Preferably, the reference color temperature of the entrance pupil position of the wide-angle camera is 2000K~8000K, including endpoint value.
Preferably, the wide-angle camera is the wide-angle camera of visible ray sensitive kind.
Preferably, the spherical source is visible light source.
Preferably, the angle of visual field of the wide-angle imaging module is more than or equal to 100 °.
Understood via above-mentioned technical scheme, the optical centre measuring system for the wide-angle imaging module that the present invention is provided, bag
Include spherical source, wide-angle imaging module and computer.Due to being illuminated in the present invention using spherical source, the spherical source can
The visual field of wide-angle imaging module is completely covered, uniform photoenvironment is formed in the visual field of wide-angle imaging module, so as to
So that wide-angle imaging module shoots the picture for obtaining meeting optical centre measurement, and then improve the optical centre of wide-angle imaging module
Accuracy of measurement.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is wide-angle imaging module optical centre measurement apparatus schematic diagram of the prior art；
Fig. 2 is wide-angle imaging module optical centre measuring system schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the final picture of wide-angle imaging module optical centre measurement System Analysis provided in an embodiment of the present invention.
Embodiment
Just as described in the background section, optical centre detection method of the prior art is being applied to wide-angle imaging mould
During group, it may appear that the problem of measurement of wide-angle imaging module optical centre is inaccurate.
Inventor has found that as shown in figure 1, wide-angle imaging module optical centre measurement apparatus of the prior art
Including：Flat-plate light source 01, wide-angle imaging module 02 and computer 03.As shown in figure 1, the light sent using flat-plate light source 01 can not
The whole visual field of uniform fold wide-angle imaging module 02, the lighting environment in a-quadrant is uniform illumination environment, and for B regions
With the lighting environment in C regions, because flat-plate light source is not completely covered, the lighting environment for causing B regions and C regions is non-equal
Even photoenvironment.Therefore, the picture that wide-angle imaging module is obtained is the picture of non-homogeneous light source, in the picture of non-homogeneous light source most
Bright spot be possible to be not camera module optical centre so that there is deviation in the optical centre of subsequent analysis camera module,
And then the accurate optical centre of wide-angle imaging module can not be obtained.
Based on this, the present invention provides a kind of optical centre measuring system of wide-angle imaging module, including：
Spherical source, wide-angle imaging module and computer；
The spherical source is internally provided with spherical cavity；
The wide-angle imaging module is arranged in the spherical cavity, the picture for shooting the light received；
The computer is used to analyze the picture and confirms the optical centre of the wide-angle imaging module.
The optical centre measuring system for the wide-angle imaging module that the present invention is provided, including spherical source, wide-angle imaging module
And computer.Due to being illuminated in the present invention using spherical source, wide-angle imaging module can be completely covered in the spherical source
Visual field, forms uniform photoenvironment, so that wide-angle imaging module shoots the figure for obtaining meeting optical centre measurement
Piece, and then improve the accuracy of measurement of the optical centre of wide-angle imaging module.
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 every 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.
Fig. 2 is referred to, Fig. 2 is a kind of optical centre measuring system of wide-angle imaging module provided in an embodiment of the present invention,
Including：Spherical source 1, wide-angle imaging module 2 and computer 3；Spherical source is internally provided with spherical cavity；Wide-angle imaging module
It is arranged in the spherical cavity, the picture for shooting the light received；Computer is used to analyze picture and confirm that wide-angle is taken the photograph
As the optical centre of module.
It should be noted that the light source provided in the embodiment of the present invention is spherical source, it is flat relative to of the prior art
Plate light source, the uniform fold of spherical source is stronger, and regarding for wide-angle imaging module can be completely covered in the light that spherical source is sent
Field scope, so that the environment that wide-angle imaging module shoots picture is uniform illumination environment, obtains shooting under uniform source of light
Photo, be that subsequent analysis does basis.
Because obtained picture is what is shot under uniform source of light, the most bright spot of picture epigraph can be used as camera module
Optical centre, so that wide-angle imaging module optical centre can be obtained accurately.Due in wide-angle imaging module optics
The degree of accuracy of the heart is relative to improve, then again by calculate wide-angle imaging module optical centre and optical sensor optical centre it
Between the degree of accuracy of optical centre skew amount also improve.And then can have mesh in process of production or during product use
Property weakening or eliminate optical centre skew, improve image quality.
It should be noted that the wide-angle imaging module includes not limiting wide-angle in wide-angle camera, the embodiment of the present invention
Position of the camera in spherical cavity, inventor is by experiment discovery, entrance pupil position and the spherical cavity 11 of wide-angle camera
The distance between sphere center position be less than or equal to spherical cavity 11 radius 10%, the figure for meeting and requiring can be accessed
Piece.
In the present embodiment, in order that wide-angle camera absorb in uniform highlights region, the embodiment of the present invention can be by
The entrance pupil position of wide-angle camera is placed on the sphere center position of spherical cavity 11 so that spherical cavity can carry for wide-angle camera
For the uniform illumination environment in a spherical face.
The particular type of the wide-angle camera is not limited in the embodiment of the present invention, wide-angle camera can be visible light-sensitive
Feel type, or non-visible light sensitive kind.When wide-angle camera is visible ray sensitive kind, instant wide-angle camera is
The wide-angle camera of visible ray sensitive kind, corresponding, the light that spherical source is sent is visible ray, i.e., described spherical source is can
See in radiant, the embodiment of the present invention, the reference color temperature of the entrance pupil position of optional wide-angle camera is 2000K~8000K, bag
Include endpoint value.In order to avoid the picture of intake is excessively bright or secretly causes discrimination too low excessively, the brightness of spherical source is adjustable
So that the brightness in spherical cavity is adjustable.Optional in the present embodiment, the brightness range of the entrance pupil position of wide-angle camera is
0lx~20000lx, including 20000lx.
Accordingly, in the embodiment of the present invention when wide-angle camera is the wide-angle camera of non-visible ray sensitive kind, ball
Shape light source is non-visible light sources, and what is sent is non-visible light, likewise, according to the sensitive non-visible wavelength of wide-angle camera
Scope, adjusts the emission wavelength of spherical source until that can experience illumination by wide-angle camera.In order to avoid the picture mistake of intake
Bright or secretly cause discrimination too low excessively, the brightness of the entrance pupil position of wide-angle camera is also to adjust.
The concrete condition of spherical source is not limited in the embodiment of the present invention, if the wavelength for the light that spherical source is sent with it is wide
The sensitive wave length correspondence of angle mirror head, brightness and the colour temperature of specific spherical source can carry out Bu Tong bright according to the actual requirements
Degree and colour temperature are adjusted.
The concrete form of wide-angle imaging module is not limited in the embodiment of the present invention yet, optionally, the wide-angle imaging module
Including wide-angle camera and optical sensor.The visual field of the wide-angle camera is more than or equal to 100 °.
The specific measuring method of optical centre skew amount is in the embodiment of the present invention：
The picture that wide-angle imaging module is shot is sent to computer；
Computer extracts the centre coordinate of picture, the sensitive chip photosensitive area of optical sensor as in wide-angle imaging module
The centre coordinate in domain, namely optical sensor optical centre coordinate；
Computer carries out binary conversion treatment by the highlights region to picture, luminance threshold is set, more than luminance threshold
Pixel constitutes an approximate circle, and computer reads central coordinate of circle, and the central coordinate of circle is the wide-angle imaging of wide-angle imaging module
Head camera lens be incident upon photosensitive region imaging central coordinate of circle, namely wide-angle camera optical centre coordinate；
The optical centre coordinate of the optical centre coordinate of the optical sensor and the wide-angle camera is added and subtracted
Computing, obtains optical centre skew amount.
Specifically, Fig. 3 is referred to, Fig. 3 is wide-angle imaging module optical centre measuring system provided in an embodiment of the present invention
The final picture of analysis, wherein, the optical centre of optical sensor is the physical centre of picture, namely shown in 220 in Fig. 3,
The optical centre of wide-angle camera is point most bright in luminance area, as shown in 210 in Fig. 3, by the optics of wide-angle camera
Center 210 and the optical centre 220 of optical sensor are calculated, you can obtain optical centre skew amount.
The optical centre measuring system for the wide-angle imaging module that the present invention is provided, including spherical source, wide-angle imaging module
And computer.Due to being illuminated in the present invention using spherical source, wide-angle imaging module can be completely covered in the spherical source
Visual field, forms uniform photoenvironment in the visual field of wide-angle imaging module, so that wide-angle imaging module is shot
To the picture for meeting optical centre measurement, the optical centre degree of accuracy of wide-angle imaging module can be improved, and then can be carried
The accuracy of measurement of high optics center offset.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (9)
1. a kind of optical centre measuring system of wide-angle imaging module, it is characterised in that including：
Spherical source, wide-angle imaging module and computer；
The spherical source is internally provided with spherical cavity；
The wide-angle imaging module is arranged in the spherical cavity, the picture for shooting the light received；
The computer is used to analyze the picture and confirms the optical centre of the wide-angle imaging module.
2. the optical centre measuring system of wide-angle imaging module according to claim 1, it is characterised in that the wide-angle is taken the photograph
As module include wide-angle camera, between the entrance pupil position of the wide-angle camera and the sphere center position of the spherical cavity away from
From 10% of the radius less than or equal to the spherical cavity.
3. the optical centre measuring system of wide-angle imaging module according to claim 2, it is characterised in that the wide-angle is taken the photograph
As the entrance pupil of head is located at the sphere center position of the spherical cavity.
4. the optical centre measuring system of wide-angle imaging module according to claim 3, it is characterised in that the spherical light
The luminosity and light emission color temperature in source are adjustable.
5. the optical centre measuring system of wide-angle imaging module according to claim 4, it is characterised in that the wide-angle is taken the photograph
As the brightness range of the entrance pupil position of head is 0lx~20000lx, including 20000lx.
6. the optical centre measuring system of wide-angle imaging module according to claim 4, it is characterised in that the wide-angle is taken the photograph
As the reference color temperature of the entrance pupil position of head is 2000K~8000K, including endpoint value.
7. the optical centre measuring system of wide-angle imaging module according to claim 1, it is characterised in that the wide-angle is taken the photograph
As the wide-angle camera that head is visible ray sensitive kind.
8. the optical centre measuring system of wide-angle imaging module according to claim 7, it is characterised in that the spherical light
Source is visible light source.
9. the optical centre measuring system of the wide-angle imaging module according to claim 1-8 any one, it is characterised in that
The angle of visual field of the wide-angle imaging module is more than or equal to 100 °.
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| CN201710399783.9A CN107071400A (en) | 2017-05-31 | 2017-05-31 | A kind of optical centre measuring system of wide-angle imaging module |
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| CN201710399783.9A CN107071400A (en) | 2017-05-31 | 2017-05-31 | A kind of optical centre measuring system of wide-angle imaging module |
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| CN108632604A (en) * | 2018-05-25 | 2018-10-09 | 歌尔科技有限公司 | The detection method and device of camera lens optical center |
| CN109375470A (en) * | 2018-12-07 | 2019-02-22 | 歌尔股份有限公司 | A kind of test device, test macro and the test method of wide-angle mould group |
| CN110858899A (en) * | 2018-08-22 | 2020-03-03 | 高新兴科技集团股份有限公司 | Method and system for measuring optical axis center and field angle of camera movement |
| CN112468802A (en) * | 2020-11-04 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Camera homogeneity test auxiliary device |
| CN113891068A (en) * | 2021-09-27 | 2022-01-04 | 安徽江淮汽车集团股份有限公司 | Optical axis precision detection method based on camera uniformity test auxiliary device |
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| CN108322738A (en) * | 2018-02-28 | 2018-07-24 | 信利光电股份有限公司 | A kind of alignment method of 360 ° of full-view camera modules |
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Application publication date: 20170818 |