CN106997103A - A kind of device and method of rapid alignment minisize optical lens optical axis - Google Patents
A kind of device and method of rapid alignment minisize optical lens optical axis Download PDFInfo
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- CN106997103A CN106997103A CN201610050056.7A CN201610050056A CN106997103A CN 106997103 A CN106997103 A CN 106997103A CN 201610050056 A CN201610050056 A CN 201610050056A CN 106997103 A CN106997103 A CN 106997103A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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Abstract
The present invention debugs field suitable for precision instruments, there is provided a kind of device of rapid alignment minisize optical lens optical axis, including be arranged at film image above minisize optical lens to be aligned, relay lens, bottom-up shooting below minisize optical lens camera, and for adjusting the adjustment mechanism of minisize optical lens optical axis, relay lens is located between film image and minisize optical lens, the optical axis coincidence of film image, relay lens and camera, the center of film image is provided with the center superposition of pattern image, its center and film image.The present invention is in the case where meeting the optical axis coincidence of film image, relay lens and camera, shot by the way that camera is bottom-up, the light shaft offset amount of minisize optical lens can be just analyzed by film image and the picture of pattern image, and be adjusted by adjustment mechanism, the apparatus structure and algorithm are succinctly uncomplicated, it is easy to operate, it is not required that measuring instrument costly, optical axis alignment efficiency and precision are improved, cost has been saved.
Description
Technical field
The invention belongs to precision optical machinery integration techno logy field, more particularly to a kind of rapid alignment minisize optical lens
The device and method of optical axis.
Background technology
At present, handheld mobile device such as mobile phone and tablet personal computer etc. is more popularized, and people are for these equipment
Shoot function also has a very high requirement, therefore micro-lens are in great demand, and have very high requirement to production capacity.
Minisize optical lens light shaft alignement is the important step of mobile device picture shooting assembly assembling, and traditional alignment is micro-
The method of type optical lens is generally that the position of minisize optical lens is adjusted using mechanical system, and utilizes level
Instrument adjusts the angle of inclination of micro-lens.This method needs to add additionally in minisize optical lens assembling
Apparatus, while also may require that artificial a large amount of participations and adjustment, the time required for alignment camera lens is long, again
Requirement due to automation equipment to measurement accuracy is very high, to reach the purpose of alignment minisize optical lens, just
Measuring instrument costly is needed, therefore the cost of minisize optical lens optical axis alignment is also higher.
The content of the invention
It is an object of the invention to provide a kind of device of rapid alignment minisize optical lens optical axis, it is intended to is lifted
Minisize optical lens light shaft alignement efficiency.
The present invention is achieved in that a kind of device of rapid alignment minisize optical lens optical axis, including sets
Film image, relay lens above minisize optical lens to be aligned, it is arranged under the minisize optical lens
The camera of the bottom-up shooting of side, and for adjusting the adjustment mechanism of minisize optical lens optical axis, it is described
Relay lens is located between the film image and minisize optical lens, the film image, relay lens and camera
Optical axis coincidence, the center of the film image is provided with pattern image, the center of the pattern image and described
The center superposition of film image.
Another object of the present invention is to provide a kind of method of rapid alignment minisize optical lens optical axis, including
Following step:
Film image is chosen, the center of the film image is provided with pattern image, the center of the pattern image
With the center superposition of film image;
Relay lens and the film image are sequentially arranged above in minisize optical lens to be aligned, is waiting to be aligned
The lower section of minisize optical lens sets camera, makes the optical axis coincidence of film image, relay lens and camera;
Set the parameter of the camera;
Minisize optical lens imaging is passed through using the bottom-up film image that shoots of the camera, obtains and claps
Take the photograph image;
The level of the optical axis of minisize optical lens is obtained according to the image space of film image in the shooting image
Offset;
The skew of the optical axis of minisize optical lens is obtained according to the image space of pattern image in the shooting image
Angle;
According to the horizontal offset and deviation angle regulation minisize optical lens, make its optical axis and the camera
Optical axis coincidence, complete light shaft alignement.
The device for the rapid alignment minisize optical lens optical axis that the present invention is provided is meeting film image, relay lens
In the case of the optical axis coincidence of camera, pass through that camera is bottom-up to be shot, it is possible to by film image and
Finally the picture that is formed in shooting image analyzes the light shaft offset amount of minisize optical lens to its pattern image, enters
And quickly obtain optical axis correction parameter, and adjusted in time by adjustment mechanism, the apparatus structure and
Algorithm is succinctly uncomplicated, it is easy to operate, and is difficult to cause error, it is not required that measuring instrument costly,
The optical axis alignment efficiency and precision of minisize optical lens has been significantly increased, and has saved cost.
Brief description of the drawings
Fig. 1 is the apparatus structure signal of rapid alignment minisize optical lens optical axis provided in an embodiment of the present invention
Figure;
Fig. 2 is shot using the device of rapid alignment minisize optical lens optical axis provided in an embodiment of the present invention
Image;
Fig. 3 is the optical axis of minisize optical lens without image when offseting;
Image when Fig. 4 is the optical axis occurred level skew of minisize optical lens;
Image when Fig. 5 is the skew of optical axis occurred level and angle inclination of minisize optical lens;
Fig. 6 is the flow chart of the method for rapid alignment minisize optical lens optical axis provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be straight
It is connected on another element or may be simultaneously present centering elements.When an element is known as " being connected to "
Another element, it can be directly to another element or may be simultaneously present centering elements.
Only it is phase each other it should also be noted that, the orientation term such as left and right, upper and lower in the present embodiment
To concept or using the normal operating condition of product as reference, and it should not be regarded as restrictive.
Such as Fig. 1, the embodiment of the present invention provides a kind of device of rapid alignment minisize optical lens optical axis, including
It is arranged at the film image 02 above minisize optical lens 01 to be aligned, relay lens 03, is arranged at miniature light
The camera 04 of the bottom-up shooting of the lower section of camera lens 01 is learned, and for adjusting the optical axis of minisize optical lens 01
Adjustment mechanism 05, the relay lens 03 be located between film image 02 and minisize optical lens 01, the film
The optical axis coincidence of image 02, relay lens 03 and camera 04, in addition, the center of film image 02 is provided with spy
Levy figure 021, the center of this feature figure 021 and the center superposition of film image 02.That is, from
The optical axis for the camera 04 clapped upwards down is perpendicular to film image 02, the center alignment relay lens 03 of camera 04
Center and film image 02 center, the center of the pattern image 021 in the middle of film image 02 exists
In the bosom pixel that camera 04 is shot.During whether detection optical axis is aligned, make camera 04 under
To photographs, film image 02 can be imaged by minisize optical lens 01, and the picture is shot by camera 04,
Re-imaging on the imaging surface of camera 04, the shooting image that camera 04 is exported is as shown in Fig. 2 the square of maximum
Shape region is shooting image region, and middle circular clear zone is film image 02 through the institute of minisize optical lens 01
Into picture of the picture in shooting image, the rectangle spot inside the clear zone is pattern image 021 on film image 02
Picture through the imaging of minisize optical lens 01 in shooting image.According to the circular clear zone and the position of rectangle spot
The horizontal offset and deviation angle of minisize optical lens 01 can be determined by putting, and the horizontal offset refers to miniature
The optical axis of optical lens 01 is in the horizontal direction perpendicular to above-mentioned film image 02 and the optical axis of camera 04
Offset, deviation angle refers to the optical axis of minisize optical lens 01 relative to film image 02 and camera 04
Optical axis angle of inclination.Determine after the two parameters, you can micro-optical is adjusted by adjustment mechanism 05
The position of camera lens 01 and angle, realize light shaft alignement.
In the present embodiment, the pattern image 021 on film image 02 can be rectangle, it is further preferred that
Can be square.Certainly, in other embodiments, pattern image 021 can also be rhombus, circle,
Triangle, regular polygon etc..
The device of the optical axis of rapid alignment minisize optical lens 01 provided by above-mentioned principle, the present embodiment
In the case where meeting the optical axis coincidence of film image 02, relay lens 03 and camera 04, pass through camera 04
It is bottom-up to shoot, it is possible to pass through film image 02 and its final shape in shooting image of pattern image 021
Into picture analyze the light shaft offset amount of minisize optical lens 01, and then quickly obtain optical axis correction parameter,
And adjusted in time by adjustment mechanism 05, the apparatus structure and algorithm are succinctly uncomplicated, it is easy to operate,
And be difficult to cause error, it is not required that measuring instrument costly, minisize optical lens have been significantly increased
01 optical axis alignment efficiency and precision, and saved cost.
In the present embodiment, minisize optical lens 01 can be arranged on adjustment mechanism 05, the adjustment mechanism
05 is both used for bearing micro optical lens 01, is used to adjust its position and angle of inclination again, one-object-many-purposes, easily
In simplified apparatus structure.Further, in a kind of feasible embodiment, adjustment mechanism 05 can include using
In the moving member of the horizontal level of regulation minisize optical lens 01, and for adjusting minisize optical lens 01
The tumbler at the angle of inclination of optical axis, the moving member and tumbler can be flexibly connected.
In the present embodiment, in order to control camera 04 shoot and adjustment mechanism 05 action, the device is also
Including controller, it is connected with camera 04 and adjustment mechanism 05, and the image that camera 04 is shot can be carried out
Analysis, to obtain the offset of the optical axis of minisize optical lens 01, can determine adjustment mechanism according to the offset
05 correction parameter, and minisize optical lens 01 are adjusted based on the correction state modulator adjustment mechanism 05.
Certainly, in other embodiments, the function that the controller is realized can be integrated in the calculating outside the device
Machine, has the software for carrying out corresponding computing in the computer.
The present invention further provides a kind of method of the optical axis of rapid alignment minisize optical lens 01, this method is based on
Said apparatus is realized, specifically includes following step:
In step S101, film image 02 is chosen, the center of film image 02 is provided with pattern image 021,
The center of pattern image 021 and the center superposition of film image 02;
In step s 102, relay lens 03 and phenanthrene are sequentially arranged above in minisize optical lens 01 to be aligned
Woods image 02, minisize optical lens 01 to be aligned lower section set camera 04, make film image 02, in
After mirror 03 and the optical axis coincidence of camera 04;
In step s 103, the parameter of camera 04 is set;
In step S104, minisize optical lens are passed through using the bottom-up film image 02 that shoots of camera 04
01 imaging, obtains shooting image;
In step S105, micro-optical mirror is obtained according to the image space of film image 02 in shooting image
The horizontal offset of first 01 optical axis;
In step s 106, micro-optical mirror is obtained according to the image space of pattern image in shooting image 021
The deviation angle of first 01 optical axis;
In step s 107, minisize optical lens 01 are adjusted according to horizontal offset and deviation angle, makes it
The optical axis coincidence of optical axis and camera 04, completes light shaft alignement.
Further, in above-mentioned steps S101, the pattern image 021 at the center of film image 02 is preferably
Rectangle, more preferably square, can also select rhombus, triangle, circle etc. to be easy to identification wherein
The figure of heart point.
In above-mentioned steps S103, the parameter of setting include film image 02 in minisize optical lens 01 into
The magnitude range of picture, degree (for the inhibition level of picture noise) and image district of image smoothing etc..
The image space according to film image 02 in shooting image that above-mentioned steps S105 is proposed obtains miniature light
The step of horizontal offset for the optical axis for learning camera lens 01, can specifically be achieved in that, first, determine coordinate system,
The plane that the face of shooting image is determined as x-axis and y-axis can be set, with a known point (such as center on the face
Point) it is origin, the length in x-axis and y-axis is in units of a pixel.The first step is carried out, in shooting figure
The picture that film image 02 is formed in minisize optical lens 01 is found as in, the centre coordinate of the picture is determined
p(xp,yp), and shooting image centre coordinate o (x0,y0), then the center of the picture is relative to shooting image
Departure Δ x and Δ y of the center in x-axis and y-axis can be defined as:Δ x=(xp-x0),
Δ y=(yp-y0);It is appreciated that the departure Δ x and Δ y is pixel count.Second step, determines micro-optical mirror
The horizontal offset of first 01 optical axis is:Δ X=k Δ x, Δ Y=k Δs y;Wherein, Δ X is micro-optical mirror
First 01 optical axis is in the offset in x-axis direction, and Δ Y is the optical axis of minisize optical lens 01 in y-axis direction
Offset, k is corresponding relation of the pixel with corresponding real physical of the shooting image measured in advance, its
The corresponding actual physics length of numerically equal to one pixel a, for example, pixel is equivalent to physical length
10mm.Pass through above-mentioned steps, it may be determined that the offset of the optical axis of minisize optical lens 01 in the horizontal direction.
Further, the image space according to pattern image in shooting image 021 that above-mentioned steps S106 is proposed
The step of deviation angle for the optical axis for obtaining minisize optical lens 01, can specifically be achieved in that:The first step,
The picture of pattern image 021 is found in shooting image, the centre coordinate r (x of the picture are determinedr,yr), and film figure
As the centre coordinate c (x of 02 picturec,yc), obtain picture of the center relative to film image 02 of this feature image
Departure Δ x=(x of the center in x-axis and y-axisr-xc), Δ y=(yr-yc);Second step, is determined miniature
The optical axis of optical lens 01 is respectively Δ α=k with respect to the horizontal-shift angle in x-axis direction and y-axis direction1Δ y,
Δ β=k2·Δx;Wherein, k1The relation of the horizontal-shift angle of pixel and actual relative x-axis for shooting image,
The horizontal-shift angle of the corresponding relative x-axis of one pixel in numerically equal to y-axis direction, k2For shooting figure
The relation of the pixel of picture and the horizontal-shift angle of actual relative y-axis, numerically equal to the one of x-axis direction
The horizontal-shift angle of the corresponding relative y-axis of pixel.So-called horizontal-shift angle, refer to optical axis in x-axis and
The projection in plane that y-axis is determined is relative to x-axis and the angle of y-axis.
Further, in the step of adjusting minisize optical lens 01 according to horizontal offset and deviation angle,
Shooting image can be handled by controller, obtain above-mentioned horizontal offset and deviation angle, according to
Horizontal offset and deviation angle determine the adjusting parameter of minisize optical lens 01, such as horizontal displacement and inclination
Angle, is then based on adjusting parameter control adjustment mechanism 05 and moves, adjust minisize optical lens 01, complete
Into light shaft alignement.Certainly, the step can also be performed by a computer.
The embodiment of the present invention shoots the specific film that backlight illuminates using the optical camera 04 of bottom-up bat
The picture that image 02 is formed in minisize optical lens 01, micro-lens can be extrapolated according to the position of imaging
The horizontal offset of optical axis, according to the picture of characteristic pattern in the picture photographed, can extrapolate micro-optical mirror
The tilt quantity of first 01 optical axis, enters according to the horizontal offset and tilt quantity to the optical axis of minisize optical lens 01
Row correction, can reach the purpose of the alignment optical axis of minisize optical lens 01.Relative to traditional approach, the present invention
Only need to the lower section device optical camera 04 in minisize optical lens 01, setting film image 02 and its feature
Image, and ensure the optical axis coincidence of film image 02, relay lens 03 and camera 04, you can realize miniature light
The optical axis alignment of camera lens 01 is learned, the cost of measuring instrument is reduced;Meanwhile, obtained using the method for image procossing
The offset of minisize optical lens 01, with very high repeatable accuracy, output can be fed directly to controller,
Optical axis is rapidly and automatically directed at, efficiency high is directed at and automaticity is high.
Presently preferred embodiments of the present invention is these are only, is not intended to limit the invention, it is all the present invention's
Any modification, equivalent substitution or improvement made within spirit and principle etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (9)
1. a kind of device of rapid alignment minisize optical lens optical axis, it is characterised in that treated pair including being arranged at
Film image, relay lens above quasi- minisize optical lens, be arranged at below the minisize optical lens from
The lower camera to photographs, and for adjusting the adjustment mechanism of minisize optical lens optical axis, the relay lens
Between the film image and minisize optical lens, the optical axis of the film image, relay lens and camera
Overlap, the center of the film image is provided with pattern image, the center of the pattern image and the film figure
The center superposition of picture.
2. the device of rapid alignment minisize optical lens optical axis as claimed in claim 1, it is characterised in that
The pattern image is rectangle, rhombus, triangle, circle or regular polygon.
3. the device of rapid alignment minisize optical lens optical axis as claimed in claim 1, it is characterised in that
The minisize optical lens are arranged on the adjustment mechanism.
4. the device of rapid alignment minisize optical lens optical axis as claimed in claim 3, it is characterised in that
The adjustment mechanism includes being used to adjust the moving member of the horizontal level of minisize optical lens, and micro- for adjusting
The tumbler at the angle of inclination of type optical lens optical axis.
5. the device of rapid alignment minisize optical lens optical axis as claimed in claim 1, it is characterised in that
Described device also includes that the image that the camera is shot can be analyzed to obtain the minisize optical lens light
The offset of axle and the controller for controlling the adjustment mechanism adjustment minisize optical lens.
6. a kind of method of rapid alignment minisize optical lens optical axis, it is characterised in that comprise the steps:
Film image is chosen, the center of the film image is provided with pattern image, the center of the pattern image
With the center superposition of film image;
Relay lens and the film image are sequentially arranged above in minisize optical lens to be aligned, is waiting to be aligned
The lower section of minisize optical lens sets camera, makes the optical axis coincidence of film image, relay lens and camera;
Set the parameter of the camera;
Minisize optical lens imaging is passed through using the bottom-up film image that shoots of the camera, obtains and claps
Take the photograph image;
The level of the optical axis of minisize optical lens is obtained according to the image space of film image in the shooting image
Offset;
The skew of the optical axis of minisize optical lens is obtained according to the image space of pattern image in the shooting image
Angle;
According to the horizontal offset and deviation angle regulation minisize optical lens, make its optical axis and the camera
Optical axis coincidence, complete light shaft alignement.
7. method as claimed in claim 6, it is characterised in that the parameter includes film image miniature
The magnitude range being imaged in optical lens, the degree and image-region of image smoothing.
8. method as claimed in claim 6, it is characterised in that according to film image in the shooting image
Image space obtain minisize optical lens optical axis horizontal offset the step of be specially:
The picture that film image is formed in minisize optical lens is found in shooting image, the center of the picture is determined
Coordinate p (xp,yp), and shooting image centre coordinate o (x0,y0), the center of the picture is obtained relative to shooting
Departure Δ x=(x of the center of image in x-axis and y-axisp-x0), Δ y=(yp-y0);
The horizontal offset for determining the optical axis of minisize optical lens is:Δ X=k Δ x, Δ Y=k Δs y;Wherein,
Δ X is offset of the optical axis in x-axis direction of minisize optical lens, and Δ Y is the optical axis of minisize optical lens in y
The offset of direction of principal axis, k is that the pixel of the shooting image measured in advance is corresponding with corresponding real physical
Relation, it is numerically equal to the corresponding actual physics length of a pixel.
9. method as claimed in claim 6, it is characterised in that according to pattern image in the shooting image
Image space obtain minisize optical lens optical axis deviation angle the step of be specially:
The picture of pattern image is found in shooting image, the centre coordinate r (x of the picture are determinedr,yr), and the film
Centre coordinate c (the x of the picture of imagec,yc), in picture of the center relative to film image for obtaining this feature image
Departure Δ x=(x of the heart in x-axis and y-axisr- xc), Δ y=(yr-yc);
The optical axis for determining minisize optical lens is respectively with respect to the horizontal-shift angle in x-axis direction and y-axis direction
Δ α=k1Δ y, Δ β=k2·Δx;Wherein, k1For the water of the pixel x-axis relative with actual optical axis of shooting image
The level of the corresponding relative x-axis of the relation of flat deviation angle, numerically equal to y-axis direction a pixel is inclined
Move angle, k2For the relation of the horizontal-shift angle of the pixel y-axis relative with actual optical axis of shooting image, number
The horizontal-shift angle of relative y-axis corresponding equal to a pixel in x-axis direction in value.
Method as claimed in claim 6, it is characterised in that according to the horizontal offset and deviation angle
Regulation minisize optical lens the step of be specially:By controller according to the horizontal offset and deviation angle
Horizontal displacement and the angle of inclination of minisize optical lens are determined, and controls adjustment mechanism according to the horizontal displacement
The minisize optical lens are adjusted with angle of inclination, light shaft alignement is completed.
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CN107632407A (en) * | 2017-11-08 | 2018-01-26 | 凌云光技术集团有限责任公司 | A kind of calibrating installation of post lens imaging system |
CN109116505A (en) * | 2018-07-24 | 2019-01-01 | 深圳睿晟自动化技术有限公司 | The optical axis bearing calibration of camera lens |
CN109164552A (en) * | 2018-12-03 | 2019-01-08 | 歌尔股份有限公司 | A kind of alignment schemes and equipment of eyeglass and screen |
CN110824722A (en) * | 2018-08-07 | 2020-02-21 | 宁波舜宇光电信息有限公司 | Structured light projection module assembly device and projection module assembly and detection method |
CN111263034A (en) * | 2019-05-27 | 2020-06-09 | 苏州松健光学科技有限公司 | Vehicle-mounted camera module focusing device and method |
CN111367090A (en) * | 2020-05-28 | 2020-07-03 | 宁波丞达精机有限公司 | Optical lens optical axis correction device and method |
CN112987218A (en) * | 2021-02-08 | 2021-06-18 | 深圳睿晟自动化技术有限公司 | Optical center calibration device and method |
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CN109116505A (en) * | 2018-07-24 | 2019-01-01 | 深圳睿晟自动化技术有限公司 | The optical axis bearing calibration of camera lens |
CN110824722B (en) * | 2018-08-07 | 2021-10-15 | 宁波舜宇光电信息有限公司 | Structured light projection module assembly device and projection module assembly and detection method |
CN110824722A (en) * | 2018-08-07 | 2020-02-21 | 宁波舜宇光电信息有限公司 | Structured light projection module assembly device and projection module assembly and detection method |
CN109164552A (en) * | 2018-12-03 | 2019-01-08 | 歌尔股份有限公司 | A kind of alignment schemes and equipment of eyeglass and screen |
CN109164552B (en) * | 2018-12-03 | 2019-03-01 | 歌尔股份有限公司 | A kind of alignment schemes and equipment of eyeglass and screen |
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CN111367090A (en) * | 2020-05-28 | 2020-07-03 | 宁波丞达精机有限公司 | Optical lens optical axis correction device and method |
CN112987218A (en) * | 2021-02-08 | 2021-06-18 | 深圳睿晟自动化技术有限公司 | Optical center calibration device and method |
CN113156656A (en) * | 2021-03-31 | 2021-07-23 | 浙江罗比科技有限公司 | Zoom camera optical axis correction method |
CN115833942A (en) * | 2023-02-17 | 2023-03-21 | 长春光客科技有限公司 | Wireless optical communication device and method adopting micro optical axis stabilizing mechanism |
CN117850152A (en) * | 2024-03-05 | 2024-04-09 | 吉林大华机械制造有限公司 | Method for accurately adjusting optical axis center of camera |
CN117850152B (en) * | 2024-03-05 | 2024-05-24 | 吉林大华机械制造有限公司 | Method for accurately adjusting optical axis center of camera |
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