CN108152991A - The assembly method and device of a kind of optical lens - Google Patents
The assembly method and device of a kind of optical lens Download PDFInfo
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- CN108152991A CN108152991A CN201810002997.2A CN201810002997A CN108152991A CN 108152991 A CN108152991 A CN 108152991A CN 201810002997 A CN201810002997 A CN 201810002997A CN 108152991 A CN108152991 A CN 108152991A
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- wavefront
- camera lens
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- light beam
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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 provides a kind of assembly method and device of optical lens, the method includes：Measure the wavefront of tested camera lens zero degree visual field；The information of the wavefront is handled to obtain aberration；The rigging position of the tested camera lens is adjusted according to the aberration.Described device includes：Collimated light source, for generating the light beam of collimation, which is tested camera lens；Microcobjective system, for will be from the beam collimation that tested camera lens is emitted into collimated light beam；Telescopic system, for expanding the collimated light beam of the microcobjective system exit；Wavefront measurement component for receiving the wavefront of the collimated light beam of telescopic system formation, measures actual wavefront information, and the actual wavefront information is tested camera lens for being adjusted when assembling.The assembly method of device and method wavefront measurement of the present invention substitutes traditional assembly method based on MTF, improves assembly precision and efficiency, realizes the large-scale production of high-performance camera lens.
Description
Technical field
The present invention relates to a kind of mounting technologies of optical device, and in particular, to a kind of assembly method of optical lens, with
And device for implementing the method.
Background technology
In recent years, flourishing with mobile phone industry, the annual shipment amount cumulative year after year of optical lens on mobile phone, simultaneously
Requirement of the market to lens performance is also higher and higher.Conventional lenses assembling, using MTF (modulation transfer function) as evaluation criterion
Seek the mtf value for detecting different visual fields, measuring principle figure during assembling is as shown in Figure 1.Adjustment principle during assembling is to work as camera lens
Interior eyeglass has the mtf value measured during eccentric or inclination that can differ more with design value, according to the mtf value and design value measured
Comparison, it is possible to guidance adjustment eyeglass, until mtf value reaches requirement.
Assembling device using MTF as evaluation criterion has certain limitation, and the assembly precision of camera lens first mainly depends on
In the measurement accuracy of MTF, the aberration demand of camera lens is not accounted for, it is impossible to meet the high performance demands of camera lens；Secondly MTF measurement sides
Method cannot meet the needs of factory's large-scale production camera lens, and MTF measuring methods need to calculate the mtf value at each visual field, in real time
Property it is insufficient.
Through retrieval, Chinese utility model patent 201620615626.8 discloses a kind of optical lens optical axis alignment device, wraps
Include for by the projecting subassembly of image projection to camera lens, drive camera lens is swung below the projecting subassembly so that the camera lens and
The oscillating platform of the projecting subassembly face, for drive an imaging sensor below the camera lens along X, Y, Z axis move with
Make the mobile platform of described image sensor and the camera lens face and be electrically connected with the oscillating platform and the mobile platform
Connect and control the master controller of the two coordinated movement of various economic factors.But the patent is only through two platforms and realizes camera lens and imaging sensor
Relative position arbitrary variation, so as to fulfill assembling, can not solve the problem above-mentioned.
Application No. is 201710312378.9 Chinese invention applications, disclose a kind of optics display module accurate assembly side
Method and assembly system pass through the optical lens ideal image distance L and optical lens actual imaging distance L ' of optics display module
Range difference adjustment optics display module image generation unit displacement distance m, assembling process is almost not required to manual intervention, directly
It connected actuating mechanism controls image generation unit and carries out position adjustment, high degree of automation.The patented technology equally can not
Solve the technical issues of above-mentioned.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of assembling device and method of optical lens,
Traditional assembly method based on MTF is substituted with the assembly method of wavefront measurement, assembly precision and efficiency is improved, realizes high-performance mirror
The large-scale production of head.
According to an aspect of the present invention, a kind of assembly method of optical lens is provided, including：
Measure the wavefront of tested camera lens zero degree visual field；
The information of the wavefront is handled to obtain every aberration；
The rigging position of the tested camera lens is adjusted according to the aberration.
Preferably, the wavefront for measuring tested camera lens zero degree visual field, wherein：Quilt is measured using wavefront measurement component
The wavefront of camera lens zero degree visual field is surveyed, measures actual wavefront information.
Preferably, it is described that the wavefront information is handled to obtain aberration, refer to：Intended with zernike polynomial
It closes, decomposites every aberration.
Preferably, the wavefront measurement component is Wavefront sensor, especially with Shack Hartmann wave front sensor, Shack
Hartmann wave front sensor precision is high, measures real-time.
Preferably, it is described that the wavefront information is handled to obtain aberration, refer to：To the wavefront information Ze Nike
Multinomial is fitted, and decomposites every aberration.
Preferably, the wavefront of the tested camera lens zero degree visual field, forms in the following manner：
Using the incident tested camera lens of collimated light beam；
It will be from the beam collimation of the tested camera lens outgoing into collimated light beam；
The collimated light beam is expanded, forms the wavefront of the tested camera lens zero degree visual field.
Preferably, the tested camera lens is divided into two parts, and first part is fixed part, and second part is adjustable whole
Point, the collimated light beam that the collimation laser light source generates is emitted after the first part and the second part successively, root
The second part position of the tested camera lens is adjusted according to the aberration, the first part and the second part
It is assembled to form optical lens.
According to the second aspect of the invention, a kind of assembling device of optical lens is provided, including：
Collimated light source, for generating the light beam of collimation, which is tested camera lens；
Microcobjective system, for will be from the beam collimation of the tested camera lens outgoing into collimated light beam；
Telescopic system, for expanding the collimated light beam of the microcobjective system exit；
Wavefront measurement component, the wavefront that the collimated light beam for receiving the telescopic system outgoing is formed, measures reality
Border wavefront information, the actual wavefront information are tested camera lens for being adjusted when assembling.
Preferably, the tested camera lens includes first part and second part, wherein：The first part is fixed part
Point, the second part is adjustable part, and the collimated light beam that the collimation laser light source generates passes through described first successively
Point and the second part, and the incident microcobjective system after the second part.
It is highly preferred that the tested camera lens, wherein the adjustable second part is placed on five dimensions adjustment platform, five dimensions
Adjustment platform can be moved along light path, and subsequently to adjust when automatically controls, and realizes the variation of position.
Preferably, the wavefront information that the wavefront measurement component detects passes to subsequent processor, the processor pair
Wavefront information is fitted with zernike polynomial, decomposites every aberration, according to the items aberration directly to the measured lens
Head second part carries out control adjustment.
Preferably, preferably using Shack Hartmann wave front sensor, Shack Hartmann wavefront passes the wavefront measurement component
Sensor precision is high, measures real-time.
Preferably, the collimation laser light source, the tested camera lens, the microcobjective system, the telescopic system
And the wavefront measurement component is arranged in order in same optical axis.
Compared with prior art, the present invention has following advantageous effect：
Present invention assembling apparatus structure advantages of simple, obtains wavefront information by the co-ordination of each optical device, has
There is higher measurement accuracy, the aberration of camera lens can directly be calculated by the wavefront information of measurement, meet the high-performance of camera lens
Demand.The assembling device of present invention wavefront measurement substitutes traditional assembling device based on MTF, improves assembly precision and efficiency,
Realize the large-scale production of high-performance camera lens.
Further, for apparatus of the present invention preferably using Shack Hartmann wave front sensor, precision is high, and measurement is real-time,
Eyeglass assembling speed is high, and working efficiency is high, low to operating environment requirements.
In addition, assembly method of the present invention breaks existing conventional design thinking, use wavefront measuring method substitute using MTF as
The assembly method of evaluation criterion, real-time, reaction faster, convenient for applying in producing line, realizes large-scale production.
The above-mentioned device and method of the present invention are applied widely, can be used for the small-sized camera lens such as mobile lens, security lens, can
It realizes whole automation controls, so as to be applied in the large-scale producing line in factory, realizes the high-volume Automated assembly of camera lens.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is existing camera lens MTF measuring principle figures；
Fig. 2 is the assembling apparatus structure schematic diagram of optical lens in one embodiment of the invention；
In figure：1 is collimated light source, and 2 be tested camera lens first part, and 3 be tested camera lens second part, and 4 be microcobjective
System, 5 be telescopic system, and 6 be Shack Hartmann wave front sensor.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in Figure 1, for existing camera lens MTF measuring principle figures, i.e.,：It is marked using MTF (modulation transfer function) as evaluation
It is accurate, it is desirable that detect the mtf value of different visual fields.Adjustment principle during assembling is surveyed when eyeglass has eccentric or inclination in camera lens
The mtf value measured can differ more with design value, according to the mtf value measured and the comparison of design value, it is possible to guidance adjustment
Eyeglass, until mtf value reaches requirement.
In order to solve the problems, such as that above-mentioned conventional method exists, the present invention breaks through conventional thought, using the design for measuring wavefront
Thinking, realizes the assembling of optical lens, and wherein method includes：Measure the wavefront of tested camera lens zero degree visual field；To the wavefront
Information is handled to obtain aberration；The rigging position of the tested camera lens is adjusted according to the aberration.It is corresponding, this hair
It is bright in order to more preferably realize the purpose of this method, additionally provide assembling device corresponding with this method.
Below before the embodiment of the method for the present invention and device is illustrated, the relational language being related to is explained, specifically
Including：
Aberration：Difference between ideal imaging and the actual imaging of optical system.
Wavefront：Wave travels to the curved surface that equiphase surface forms at a certain position and is known as wavefront.
Wavefront sensor：Wavefront error is measured, wavefront information is converted into the detector of control signal.
Shack-Hartmann wavefront sensor (Shack-Hartmann)：Shack hartman sensor is breathed out in classical Shack
The wavefront measurement instrument to grow up on the basis of special graceful measuring method.Shack Hartmann wave front sensor is mainly by lenticule battle array
Row and high-speed CCD composition through microlens array beam splitting and are focused on CCD focal planes before probing wave, by centroid calculation and wavefront
Restructing algorithm can obtain detection corrugated.
Modulation transfer function (MTF)：The demand pairs that 1mm interior energies are presented, unit lp/mm.
Modulation transfer function (MTF) contrast curves：Horizontal axis MTF, the longitudinal axis are contrast.
Zernike polynomial：Usual people can describe the aberration of optical system using the form of power series expansion.By
The form of the aberrational polynomial observed in zernike polynomial and optical detection is consistent, thus it is frequently used to retouch
State wavefront properties.
As shown in Fig. 2, a preferred embodiment structure diagram of the assembling device for optical lens of the present invention, in figure：It is accurate
Direct light source 1 is tested camera lens first part 2, is tested camera lens second part 3, microcobjective system 4, and telescopic system 5 and Shack are breathed out
Special graceful Wavefront sensor 6.The device measures wavefront information, further adjustment is tested by the information by ingehious design light path
Assembling is completed in the position of camera lens second part 3.Wherein：
Collimated light source 1, for generating the light beam of collimation；
Tested camera lens first part 2 and second part 3 form commanding lens entirety to be installed, and it is solid to be tested camera lens first part 1
Determine part, tested camera lens second part 2 is adjustable part, can be placed on five dimensions adjustment platform；
Microcobjective system 4, for will be from the beam collimation that tested camera lens second part is emitted into collimated light beam；
Telescopic system 5, for expanding collimated light beam；
Shack Hartmann wave front sensor 6 for receiving the wavefront for the tested camera lens zero degree visual field that final light beam is formed, is surveyed
Actual wavefront information is measured, direct guidance is provided to adjust tested camera lens second part during assembling.
In above-mentioned tested camera lens, first part 2 and second part 3 are all eyeglasses, and a usual camera lens is exactly an optics
System has seven or eight eyeglasses, this optical system is divided into two parts by even more eyeglasses, and first part can include big portion
Divide eyeglass, second part is typically a two panels eyeglass.This two parts, which is assembled together, just constitutes entire optical lens.
In above device, all components are all located in same optical axis (center of all components is located in same horizontal line),
Collimated light source 1 sends out parallel beam incident and is tested camera lens, and tested camera lens first part 2 is fixed, is tested camera lens second
Part 3 is placed on five dimensions adjustment platform, and five dimension adjustment platforms can be moved along light path.Collimated light beam is by tested camera lens entirety post-concentration
To the focal position of tested camera lens, continue to advance along light path.Convergent beam is transformed into collimated light beam by microcobjective system 4,
(matching and amplification) is expanded by telescopic system 5, is incident on Shack Hartmann wave front sensor 6.Shack Hartmann's wavefront
The wavefront of tested camera lens zero degree visual field that sensor 6 detects, can be fitted with zernike polynomial, decomposite every picture
Difference is directly adjusted tested camera lens second part 3, so as to complete to assemble.The wavefront of tested camera lens zero degree visual field also becomes
Wavefront on axis.
It is one embodiment of apparatus of the present invention above, certainly, in other embodiments, above device can be wrapped further
Processor is included, the wavefront which is used to detect Shack Hartmann wave front sensor 6 is handled, and can use Ze Nike
Multinomial is fitted, and decomposites every aberration, directly tested camera lens second part 3 is adjusted, so as to complete to assemble.Separately
Outside, in other embodiments, other Wavefront sensors can also be used, it is not limited to Shack Hartmann wave front sensor 6.
In other embodiments, in described device, collimation laser light source may be used in collimated light source 1, can also use LED
Light source.
Assembling apparatus structure advantages of simple in the above embodiment of the present invention, is obtained by the co-ordination of each optical device
To wavefront information, there is higher measurement accuracy, the aberration of camera lens can directly be calculated by the wavefront information of measurement, meet
The high performance demands of camera lens.
The assembling device of present invention wavefront measurement substitutes traditional assembling device based on MTF, improves assembly precision and effect
Rate realizes the large-scale production of high-performance camera lens.
Shack Hartmann wave front sensor may be used in the present invention, and the sensor accuracy is high, and wavefront measurement precision is up to 1/
20 wavelength, measure real-time, eyeglass assembling speed height, and working efficiency height is low to operating environment requirements.
In an alternative embodiment of the invention, by using the device in above-described embodiment, the assembling of kind of optical lens is carried out,
The implementation process of this method includes：
S1：The light beam of collimation is generated using collimated light source 1, which is tested camera lens；
S2：Tested camera lens is divided into two parts, and first part is fixed part 2, and second part 3 is adjustable part, described
The collimated light beam that collimated light source 1 generates passes through the first part 2 and the second part 3 successively；
S3：It will be from the beam collimation that the second part 3 of the tested camera lens is emitted into directional light using microcobjective system 4
Beam；
S4：The collimated light beam being emitted using telescopic system 5 to the microcobjective system 4 is expanded；
S5：The formation of collimated light beam after the telescopic system 5 expands is received using Shack Hartmann wave front sensor 6
Wavefront is the wavefront for measuring tested camera lens zero degree visual field, measures actual wavefront information, is fitted with zernike polynomial, point
Every aberration is solved, instructs to be adjusted the second part 3 of the tested camera lens.
In above method embodiment, the tested camera lens, wherein the adjustable second part 3 is placed on the adjustment of five dimensions
On platform, the five dimensions adjustment platform is moved along light path.
In above method embodiment, the collimated light source 1, the tested camera lens, the microcobjective system 4, the prestige
Remote mirror system 5 and the Shack Hartmann wave front sensor 6 are arranged in order, and the center of these components is equal in same light path
On same central axes.
In the above method, wavefront information passes to a processor on the axis that the Shack Hartmann wave front sensor 6 detects,
The processor is fitted wavefront information on axis with zernike polynomial, decomposites every aberration, according to the items aberration
Control adjustment is directly carried out to the tested camera lens second part (general capture difference minimum value is best).Processor can pass through
Corresponding software realizes the processing of the wavefront information, certainly, in other embodiments, other modes can also be used to realize on axis
The processing of wavefront information obtains every aberration, and then the assembling for instructing above-mentioned tested camera lens.
Assembly method of the present invention breaks existing conventional design thinking, and wavefront measuring method is used to substitute using MTF as evaluation
The assembly method of standard, real-time, reaction faster, convenient for applying in producing line, realizes large-scale production.
The above-mentioned device and method of the present invention are applied widely, can be used for the small-sized camera lens such as mobile lens, security lens, can
It realizes whole automation controls, so as to be applied in the large-scale producing line in factory, realizes the high-volume Automated assembly of camera lens.
It is only a preferred embodiment to be formed before above method medium wave, in other embodiments of the method, wavefront formation
Other modes may be used, it is not limited to it is carried out using above-mentioned device, as long as the measurement of wavefront information can be realized,
To achieve the object of the present invention.
It should be noted that the step in the method provided by the invention, can utilize corresponding component in described device
Or the step of component part is achieved, and the technical solution that those skilled in the art are referred to described device realizes the method
Flow, that is, the embodiment in the system can be regarded as realizing the preference of the method, and it will not be described here.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (10)
1. a kind of assembly method of optical lens, it is characterised in that：Including：
Measure the wavefront of tested camera lens zero degree visual field；
The information of the wavefront is handled to obtain every aberration；
The rigging position of the tested camera lens is adjusted according to the aberration.
2. the assembly method of optical lens according to claim 1, it is characterised in that：The tested camera lens zero degree of measurement regards
The wavefront of field, wherein：The wavefront of tested camera lens zero degree visual field is measured using wavefront measurement component, measures actual wavefront information.
3. the assembling device of optical lens according to claim 2, which is characterized in that the wavefront measurement component uses the summer
The graceful Wavefront sensor of Elkhart.
4. the assembly method of optical lens according to claim 1, it is characterised in that：It is described that the wavefront information is carried out
Processing obtains aberration, refers to：The information of the wavefront with zernike polynomial is fitted, decomposites every aberration.
5. the assembly method of optical lens according to claim 1, it is characterised in that：The tested camera lens zero degree visual field
Wavefront is formed in the following manner：
Using the incident tested camera lens of collimated light beam；
It will be from the beam collimation of the tested camera lens outgoing into collimated light beam；
The collimated light beam is expanded, forms the wavefront of the tested camera lens zero degree visual field.
6. according to the assembly method of claim 1-5 any one of them optical lens, it is characterised in that：The tested camera lens point
For two parts, first part is fixed part, and second part is adjustable part, the collimated light of the collimation laser light source generation
Shu Yici is emitted after the first part and the second part, according to the aberration to described the of the tested camera lens
Two portions are adjusted, and the first part and the second part are assembled to form optical lens.
7. a kind of assembling device of optical lens, which is characterized in that including：
Collimated light source, for generating the light beam of collimation, which is tested camera lens；
Microcobjective system, for will be from the beam collimation that tested camera lens is emitted into collimated light beam；
Telescopic system, for expanding the collimated light beam of the microcobjective system exit；
Wavefront measurement component, the wavefront that the collimated light beam for receiving the telescopic system outgoing is formed, measures practical wave
Preceding information, the actual wavefront information are tested camera lens for being adjusted when assembling.
8. the assembling device of optical lens according to claim 7, which is characterized in that the tested camera lens includes first
Point and second part, wherein：The first part is fixed part, and the second part is adjustable part, and the collimation swashs
The collimated light beam that radiant generates is successively by the first part and the second part, and the incidence after the second part
The microcobjective system.
9. the assembling device of optical lens according to claim 8, which is characterized in that the wavefront measurement component measures
Wavefront information pass to a processor, the processor is fitted the wavefront information with zernike polynomial, decomposites
Every aberration directly carries out control adjustment according to the items aberration to the tested camera lens second part；And/or
The tested camera lens, wherein the adjustable second part is placed on five dimensions adjustment platform, the five dimensions adjustment platform edge
Light path moves.
10. according to the assembling device of claim 7-9 any one of them optical lens, which is characterized in that the wavefront measurement
Component uses Shack Hartmann wave front sensor；And/or
The collimation laser light source, the tested camera lens, the microcobjective system, the telescopic system and the wavefront
Measuring part is arranged in order in same optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002997.2A CN108152991A (en) | 2018-01-02 | 2018-01-02 | The assembly method and device of a kind of optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002997.2A CN108152991A (en) | 2018-01-02 | 2018-01-02 | The assembly method and device of a kind of optical lens |
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Family
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| CN201810002997.2A Pending CN108152991A (en) | 2018-01-02 | 2018-01-02 | The assembly method and device of a kind of optical lens |
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| CN109520712A (en) * | 2018-12-03 | 2019-03-26 | 江苏慧光电子科技有限公司 | Optical detecting method, system and optical device manufacture system |
| CN110262057A (en) * | 2019-06-14 | 2019-09-20 | 北京全欧光学检测仪器有限公司 | A kind of lens assembling device and method, electronic equipment, computer-readable medium |
| CN111090215A (en) * | 2020-01-09 | 2020-05-01 | 上海慧希电子科技有限公司 | Assembling device, method and assembling system |
| CN111122439A (en) * | 2020-01-14 | 2020-05-08 | 仪锐实业有限公司 | Device and method for detecting quality of optical lens group |
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| CN111122439A (en) * | 2020-01-14 | 2020-05-08 | 仪锐实业有限公司 | Device and method for detecting quality of optical lens group |
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Application publication date: 20180612 |