CN208421364U - optical lens and camera module - Google Patents
optical lens and camera module Download PDFInfo
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- CN208421364U CN208421364U CN201820629848.4U CN201820629848U CN208421364U CN 208421364 U CN208421364 U CN 208421364U CN 201820629848 U CN201820629848 U CN 201820629848U CN 208421364 U CN208421364 U CN 208421364U
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Abstract
Utility model the utility model provides a kind of optical lens, comprising: the first lens assembly comprising the first lens barrel and the first eyeglass being mounted in the first lens barrel；Second lens assembly comprising the second lens barrel and the second eyeglass being mounted in the second lens barrel, the second eyeglass and the first eyeglass collectively form imageable optical system, and the material of first lens barrel is different from second lens barrel；And first glue material, its first gap between the first lens assembly and the second lens assembly, and be suitable for supporting and fixing the first and second lens assemblies after hardening, wherein having the angle being not zero between the first lens assembly axis and the axis of second lens assembly.The utility model additionally provides corresponding camera module.The utility model to reduce the difference between the optical system state determined by the optical system state after the first glue material solidifies and active calibration, and then can ensure image quality by the variation of the first lens assembly of reduction.
Description
Technical field
The utility model relates to optical image technology fields, specifically, the utility model relates to optical lens and camera shootings
Mould group.
Background technique
With popularizing for mobile electronic device, the user that is used to help for being applied to mobile electronic device obtains image
The relevant technologies of the camera module of (such as video or image) have obtained swift and violent development and progress, and in recent years, take the photograph
As mould group is all widely used in many fields such as medical treatment, security protection, industrial production.
In order to meet the more and more extensive market demand, high pixel, small size, large aperture are that existing camera module is irreversible
The development trend turned.However, to realize that high pixel, small size, the demand of three aspects of large aperture are that have in same camera shooting molding
Great difficulty.For example, the increase of the compact development and Mobile phone screen accounting of mobile phone, allows interior of mobile phone to can be used in preposition camera shooting
The space of mould group is smaller and smaller, and market has also been proposed higher and higher demand to the image quality of camera module.
In compact camera module (such as camera module for mobile phone) field, generally require in view of optical imaging lens
The quality and the foozle during module packaging of head.Specifically, in the manufacturing process of optical imaging lens, mirror is influenced
Head resolving power factor is matched from the assembly of each element and its error of assembly, the error, each eyeglass of eyeglass spacer element thickness
The error of conjunction and the variation of lens materials refractive index etc..Wherein, each element and its error of assembly include each lens monomer
Eccentric between optics face thickness, lens optical face rise, optical surface face type, radius of curvature, eyeglass single side and face, lens optical face is inclined
The size of oblique equal error, these errors depends on mould and die accuracy and formed precision control ability.The mistake of eyeglass spacer element thickness
Difference depends on the machining accuracy of element.The error of the assembly cooperation of each eyeglass depends on the dimensional tolerance and mirror that are assembled element
The assembly precision of head.The introduced error of variation of lens materials refractive index then depend on material stability and batch it is consistent
Property.There is the phenomenon that accumulation deteriorates in the error of above-mentioned each elements affect resolving power, this cumulative errors can be with lens numbers
Increase and constantly increase.Existing resolving power solution is to carry out tolerance for the size of the element high to each relative sensitivity
Control, eyeglass revolution compensate raising resolving power, but since the camera lens of high pixel large aperture is more sensitive, it is desirable that tolerance is tight
Severe, such as: part sensitivity camera lens 1um eccentricity of glasses lens can bring 9 ' image planes to tilt, and cause machining eyeglass and assembling difficulty increasing,
Simultaneously because feedback cycle is long in an assembling process, cause that the Measure of Process Capability (CPK) of lens assembling is low, fluctuation is big, causes
Fraction defective is high.And as described above, it is present in multiple element, each factor because the factor for influencing camera lens resolving power very more
Control all there is the limit of the accuracy of manufacture, if only promoting the precision of each element merely, hoisting power is limited, promoted at
This is high, and is not able to satisfy the increasing image quality demand in market.
Present applicant has proposed a kind of based on active calibration technique adjustment and determines the relative position of upper and lower sub- camera lens, so
Upper and lower sub- camera lens is bonded together according to identified relative position afterwards, and then produces complete optical lens or camera shooting
The assemble method of mould group.The process capability of optical lens or camera module that this solution is able to ascend mass production refers to
Number (CPK)；It enables to each of material (such as sub- camera lens or photosensory assembly for assembling optical lens or camera module)
The precision of a element and its requirement of assembly precision become loose, so reduce optical imaging lens and camera module integral into
This；The various aberrations of camera module can be adjusted in an assembling process in real time, reduce fraction defective, reduce production cost,
Promote image quality.
However, carrying out active calibration to optical system of camera lens itself is a kind of new production technology, practical volume production needs
Consider the factors such as reliability, crash resistance, weatherability and the cost of manufacture of optical lens and camera module, also needs sometimes
Yield it can not decline caused by survey factor in face of various.For example, in a kind of process program, in the first lens assembly and second
Glue material is filled between lens assembly, so that the first lens assembly and the second lens assembly are maintained at opposite determined by active calibration
Position.However practical test manufacture discovery, optical lens compared with the image quality of camera module the active calibration stage it is obtained at
As quality usually deteriorates, this deterioration exceeds tolerance sometimes, causes product bad.Applicants have found that
In the assembling of optical lens or camera module introduce active calibration technique after, glue material, lens barrel or eyeglass variation and it is other not
Master factor may be the reason of leading to the above problem.Currently there is an urgent need to which the solution of the above problem can be overcome, so as to
Promote product yield.
Utility model content
The utility model is intended to provide a kind of solution of at least one defect that can overcome the prior art.
One aspect according to the present utility model provides a kind of optical lens, comprising: the first lens assembly comprising
First lens barrel and at least one first eyeglass being mounted in first lens barrel；Second lens assembly comprising the second lens barrel
With at least one second eyeglass being mounted in second lens barrel, at least one described second eyeglass and first eyeglass are total
With the imageable optical system of composition, and the material of first lens barrel is different from second lens barrel；And first glue material,
Its first gap between the first lens assembly and the second lens assembly, first glue material be suitable for after hardening support and
Fixed first lens assembly and second lens assembly, wherein the first lens assembly axis and second camera lens
There is the angle being not zero between the axis of component.
In one embodiment, first glue material is suitable for supporting and fixing first lens assembly and second mirror
Head part, so that the relative position of first lens assembly and second lens assembly maintains determined by active calibration
Relative position.
In one embodiment, the difference between the thermal expansion coefficient of first lens barrel and the thermal expansion coefficient of the first eyeglass
It is different to be less than first threshold.
In one embodiment, the material hydroscopicity of the first lens barrel is less than the material hydroscopicity of second lens barrel.
In one embodiment, first eyeglass is glass lens, and first lens barrel is metal lens barrel.
In one embodiment, first eyeglass is high-boron-silicon glass eyeglass, and first lens barrel is anaerobic bronze mirror
Cylinder.
In one embodiment, the elasticity modulus of materials of first lens barrel is less than the elastic properties of materials mould of first eyeglass
Amount, with absorbing external intake mechanism to the active force of first eyeglass.
In one embodiment, it is 0.920~0.940 g/cm that the material of first lens barrel, which is density,3Polyethylene material
Material, and the material of first eyeglass is polymethyl methacrylate materials.
In one embodiment, the material of first lens barrel is the first plastics, and the material of first eyeglass is second
Plastics, and the difference of the thermal expansion coefficient of first plastics and second plastics is 4 × 10-5/ DEG C within.
In one embodiment, the number of first eyeglass is less than the number of second eyeglass, and described second
Eyeglass is than first eyeglass close to sensitive chip.
In one embodiment, the number of first eyeglass is one, and the outer diameter of first eyeglass is greater than outer diameter
The smallest second eyeglass.
In one embodiment, second lens barrel uses makrolon material.
In one embodiment, first glue material is between first eyeglass and second lens barrel, and described
Non-filler between one lens barrel and second lens barrel.
Another aspect according to the present utility model additionally provides a kind of camera module, comprising: any one reality described previously
Apply optical lens described in example.
Another aspect according to the present utility model, additionally provides a kind of optical lens, and assemble method includes: to prepare each other
The first lens assembly and the second lens assembly of separation, wherein first lens assembly includes the first lens barrel and is mounted on described
At least one first eyeglass in first lens barrel, second lens assembly include the second lens barrel and are mounted on second mirror
At least one second eyeglass in cylinder, wherein first lens barrel uses the material different from second lens barrel to make；To institute
It states the first lens assembly and second lens assembly is pre-positioned, make described at least one first eyeglass and described at least one
A second eyeglass collectively forms imageable optical system；Active school is carried out according to the actual measurement imaging results of the optical system
Standard determines the relative position of first lens assembly and second lens assembly；And bonding first lens assembly
With second lens assembly, to support and fix the relative position of first lens assembly Yu second lens assembly.
In one embodiment, the active calibration includes: by the intake of intake mechanism and mobile first camera lens part
Part, to adjust and determine the relative position of first eyeglass and second lens assembly.
In one embodiment, the active calibration further include: along the first lens assembly described in adjustment planar movement, root
According to the actual measurement resolving power of the actual imaging result based on the optical system, first lens assembly and second mirror are determined
The relative position in the adjustment plane between head part；Relative position in the adjustment plane is included in the tune
The relative position on translation direction and/or rotation direction on leveling face.
In one embodiment, the active calibration further include: according to based on the optical system actual imaging result
Resolving power is surveyed, adjusts and determine the folder of axis of the axis of first lens assembly relative to second lens assembly
Angle.
In one embodiment, the active calibration further include: move institute along the direction perpendicular to the adjustment plane
The first lens assembly is stated, according to the actual measurement resolving power of the actual imaging result based on the optical system, determines first mirror
Relative position in a direction perpendicular to the plane between head part and second lens assembly.
Another aspect according to the present utility model, additionally provides a kind of camera module, and assemble method includes: using above
The optical lens assemble method assembles optical lens；And the production camera module based on assembled optical lens.
Compared with prior art, the utility model has at least one following technical effect:
1, the utility model can be by the variation of the first lens assembly of reduction, to reduce the optics after the solidification of the first glue material
Difference between optical system state determined by system mode and active calibration, and then ensure the imaging product of camera lens or mould group
Matter.
2, some embodiments of the utility model can make the first lens barrel medial surface by outer by the selection of the first lens barrel
The swell increment of the lateral surface of inside swell increment and the first eyeglass from inside to outside cuts down mutually (or eliminate), to reduce the
One lens assembly ensures the image quality of camera lens or mould group because of deformation caused by heated (such as baking).
3, some embodiments of the utility model can be made a variation by the first lens barrel shape caused by reducing moisture accumulation
Or positional shift, to reduce optical system state determined by the optical system state after the first glue material solidifies and active calibration
Between difference, and then ensure the image quality of camera lens or mould group.
4, some embodiments of the utility model can inhibit the optical surface of the first eyeglass because of the clamping of external intake mechanism
And the deformation occurred, help to reduce the optical system determined by the first glue material solidification rear optical system state and active calibration
Difference between state, and then ensure the image quality of camera lens or mould group.
Detailed description of the invention
Exemplary embodiment is shown in reference attached drawing.Embodiment and attached drawing disclosed herein should be considered illustrative
, and not restrictive.
Fig. 1 shows the diagrammatic cross-section of the optical lens of the utility model one embodiment；
Fig. 2 shows the diagrammatic cross-sections of the optical lens of the utility model another embodiment；
Fig. 3 shows the diagrammatic cross-section of the optical lens of the utility model a still further embodiment；
Fig. 4 A to Fig. 4 G shows the optical lens assemble method in the utility model one embodiment；
Fig. 5 A to Fig. 5 F shows the optical lens assemble method in another embodiment of the utility model；
Fig. 6 A shows relative position regulative mode in the active calibration in the utility model one embodiment；
Fig. 6 B shows the adjusting of the rotation in the active calibration of another embodiment of the utility model；
Fig. 6 C shows the phase for increasing the adjusting of the direction v, w in the active calibration of another embodiment of the utility model
To position regulative mode.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers
Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way
Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in the present specification, the first, second equal statement is only used for a feature and another feature differentiation
It comes, without indicating any restrictions to feature.Therefore, discussed below without departing substantially from teachings of the present application
First main body is also known as the second main body.
In the accompanying drawings, for ease of description, thickness, the size and shape of object are slightly exaggerated.Attached drawing is merely illustrative
And it is and non-critical drawn to scale.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
In bright book use when indicate exist stated feature, entirety, step, operations, elements, and/or components, but do not exclude the presence of or
It is attached with one or more of the other feature, entirety, step, operation, component, assembly unit and/or their combination.In addition, ought be such as
When the statement of at least one of " ... " appears in after the list of listed feature, entire listed feature is modified, rather than is modified
Individual component in list.In addition, when describing presently filed embodiment, use " can with " indicate " one of the application or
Multiple embodiments ".Also, term " illustrative " is intended to refer to example or illustration.
As it is used in the present context, term " substantially ", " about " and similar term are used as the approximate term of table, and
Be not used as the term of table degree, and be intended to illustrate by by those skilled in the art will appreciate that, measured value or calculated value
In inherent variability.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with
The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and
It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 shows the diagrammatic cross-section of the optical lens of the utility model one embodiment.Wherein, the section be through
Cross the section of the optical axis of optical lens.In the present embodiment, optical lens includes the first lens assembly 100, the second lens assembly 200
With the first glue material 300.Wherein the first lens assembly 100 including the first lens barrel 102 and is mounted in first lens barrel 102
First eyeglass is optionally connected using adhesive glue 103 between the first lens barrel 102 and the first eyeglass 101；Second lens assembly 200,
Four the second eyeglasses 201 lens barrel 202 and be mounted in second lens barrel 202 including second, four second eyeglasses
201 collectively form imageable optical system with first eyeglass 101, and first lens barrel 102 is using different from institute
State the material production of the second lens barrel 202；And first glue material 300, it is located at the first lens assembly 100 and the second lens assembly 200
Between the first gap 400, first glue material 300 be suitable for support and fix after hardening first eyeglass 101 with it is described
Second lens assembly 200.In this embodiment, optionally the first lens barrel 102 and the second lens barrel 202 are connected by the first glue material 300
Connect the connection to realize the first lens assembly 100 and the second lens assembly 200.First glue material 300 may be adapted to support and
Fixed first eyeglass 101 and second lens assembly 200, so that first eyeglass 101 and second camera lens part
The relative position of part 200 maintains relative position determined by active calibration.The thermal expansion coefficient of first lens barrel 102 and
Difference between the thermal expansion coefficient of one eyeglass 101 can be less than first threshold.In this embodiment, the system of the first lens barrel 102
Make material different from the second lens barrel 202, and the difference between thermal expansion coefficient and the thermal expansion coefficient of the first eyeglass 101 is less than the
One threshold value, the technical solution are consistent the thermal expansion coefficient between the first lens barrel 102 and the first eyeglass 101 substantially, from
And helps to reduce and solidify between optical system state determined by rear optical system state and active calibration in the first glue material 300
Difference, and then ensure the image quality of camera lens or mould group.In this embodiment, the first eyeglass 101 and the first lens barrel 102 possess
Approximately uniform variation condition, and then under the same conditions with the variation of equal extent, to reduce the change of relative position
Change, reduces the relative stress of the first eyeglass 101 and the first lens barrel 102, avoid the decrease of structural strength.It is making a variation simultaneously
When, the first eyeglass 101 and the first lens barrel 102 may have same or similar amount of variability, can also reduce caused by variation
Optical system deterioration.Illustratively, in a ring due to the first lens barrel 102, when the first 102 expanded by heating of lens barrel, medial surface
Ecto-entad is expanded.At the same time, the lateral surface of the first eyeglass 101 is heated and expands from inside to outside.Due to first mirror
The thermal expansion coefficient of cylinder 102 and the thermal expansion coefficient of the first eyeglass 101 are close to (difference between the two is controlled in first threshold
Within), thus the swell increment of 102 medial surface ecto-entad of the first lens barrel close to the first eyeglass 101 lateral surface from inside to outside
Swell increment, thus the two swell incremenies can cut down mutually (or eliminate), to reduce the first lens assembly because being heated
Deformation caused by (such as baking) helps to reduce in the first glue material 300 solidification rear optical system state and active school
Difference between optical system state determined by standard, and then ensure the image quality of camera lens or mould group.
In another embodiment, material of first lens barrel 102 using hydroscopicity less than the second lens barrel 202 makes.Herein,
Hydroscopicity is it can be appreciated that water absorption rate.In this embodiment, the material hydroscopicity of the first lens barrel 102 can be less than corresponding threshold
Value, so as to reduce the variation of 102 shape of the first lens barrel or positional shift caused by moisture accumulation, to help to reduce
First glue material 300 solidify after optical system state and active calibration determined by difference between optical system state, in turn
Ensure the image quality of camera lens or mould group.And the material of the second lens barrel 202 still uses traditional material, such as polycarbonate (PC) material
Material production.In this way, the second lens assembly can still be made of traditional handicraft, help to promote product yield.
Further, in one embodiment, first eyeglass 101 is optionally glass lens.Due to glass lens
With high refractive index, facilitate the height for reducing optical lens or camera module.Such as the first eyeglass 101 of glass material makes
The height of optical lens reduces, and meets the more and more thinner trend of current mobile phone.
Further, in one embodiment, first lens barrel 102 has elasticity with absorbing external intake mechanism to institute
State the active force of the first eyeglass 101.Here, the elastic properties of materials mould that there is the first lens barrel 102 elasticity can be understood as the first lens barrel
Measure the elasticity modulus of materials less than the first eyeglass.The smaller expression material of the elasticity modulus of material more has elasticity.That is,
Elasticity modulus is lower, and material deformation is relatively bigger under identical stress condition, and material easily deforms flexible better.
Further, in a preferred embodiment, the thermal expansion coefficient of first lens barrel 102 and the first eyeglass 101
Thermal expansion coefficient between difference be less than first threshold, and the hydroscopicity of first lens barrel 102 is less than the second lens barrel 202
Hydroscopicity.
Further, in a preferred embodiment, the thermal expansion coefficient of first lens barrel 102 and the first eyeglass 101
Thermal expansion coefficient between difference be less than first threshold, and the hydroscopicity of first lens barrel 102 is less than the second lens barrel 202
Hydroscopicity, and the material of first lens barrel 102 also have for absorbing external intake mechanism to first eyeglass 101
Active force elasticity.In this embodiment, flexible first lens barrel 102 is located at the first eyeglass 101 and external intake machine
Between structure, when intake mechanism moves the first eyeglass 101 in outside, buffer function can be played, to inhibit the first mirror
The deformation that the optical surface of piece 101 occurs by the clamping of external intake mechanism.
On the basis of the above embodiments, further, the number of first eyeglass 101 can be less than second mirror
The number of piece 201, and second eyeglass 201 than first eyeglass 101 close to sensitive chip.Further, at one
In embodiment, the number of first eyeglass 101 is one, and the outer diameter of first eyeglass 101 is greater than minimum outer diameter
Second eyeglass 201.In this embodiment, the outer diameter of the first eyeglass 101 is greater than the outer diameter of the smallest second eyeglass 201, adopts
The reason of taking such technical solution is may to introduce additional tolerance since the first lens barrel 102 uses very gauge material.Cause
This reduces assembling tolerance (because general by reducing the modes such as 101 number of the first eyeglass, biggish first eyeglass 101 of design
For, the more minimize the more compact, tolerance is more uncontrollable), and above-mentioned assembling tolerance is compensated with active calibration technology, from
And guarantee the whole image quality of optical lens or mould group.
Further, in some embodiments, second lens barrel 202 can use traditional material, such as polycarbonate
(PC) material makes.In this way, the second lens assembly can still be made of traditional handicraft, helps to promote product yield and mention
High efficiency.
Further, Fig. 2 shows the diagrammatic cross-sections of the optical lens of the utility model another embodiment.Wherein,
The section is the section by the optical axis of optical lens.In the present embodiment, first glue material 300 is located at first eyeglass
Between 101 and second lens barrel 202, non-filler between first lens barrel 102 and second lens barrel 202.It is different from
The first glue material 300 of Fig. 1 is located at the first eyeglass 101 and the second mirror between the first lens barrel 102 and the second lens barrel 202
Between cylinder 202.The optical system state that the present embodiment can contribute to optical lens (or camera module) finished product is more nearly
The state determined by the active calibration stage, the reason is as follows that: in the active calibration stage, outer clamp passes through the first lens barrel of clamping
102 intakes and mobile first lens assembly 100, although and flexible first lens barrel 102 can be with buffer clamp to the first eyeglass
101 active force prevents 101 deformation of the first eyeglass, and then prevents the active calibration stage that (the first lens assembly 100 is pressed from both sides at this time
Clamped by tool) and the first glue material 300 solidify after stage (at this time the first lens assembly 100 without fixture clamp) optical system
State is inconsistent.Further, the deformation of flexible first lens barrel 102 itself may influence whether the state of optical system,
And take and connected between the first eyeglass 101 and the second lens barrel 202 by the first glue material 300, it is possible to prevente effectively from this defect.
Further, Fig. 3 shows the diagrammatic cross-section of the optical lens of the utility model a still further embodiment.Wherein,
The section is the section by the optical axis of optical lens.The embodiment of the present embodiment and Fig. 1 are almost the same, and difference is described
First glue material 300 is between first lens barrel 102 and second lens barrel 202 and the first eyeglass 101 and described second
Between lens barrel 202.
Further, in the other embodiment of the utility model, the camera shooting mould based on above-mentioned optical lens is additionally provided
Group.The camera module includes optical lens and photosensory assembly.Wherein optical lens can be optics in any of the preceding embodiments
Camera lens.The present embodiment can reduce second mutation of the optical system of camera module after the completion of active calibration, to guarantee to take the photograph
As the image quality of mould group, the yield in volume production is promoted.In some embodiments, camera module can also include motor (or its
The optical actuator of its type), optical lens may be mounted in the cylindrical carrier of motor, and the pedestal of motor is installed on photosensitive group
The top surface of part.Photosensory assembly for example may include wiring board, the sensitive chip for being mounted on PCB surface, form or be installed on line
Road plate surface and the annular support and colour filter for surrounding sensitive chip.Annular support can form step, colour filter peace
On step loaded on the annular support.The pedestal of motor is installed on the top surface of the annular support.
One embodiment according to the present utility model additionally provides a kind of optical lens assemble method, comprising:
Step S10, preparation process.Prepare the first lens assembly 100 and the second lens assembly 200 being separated from each other.Wherein,
The first eyeglass 101 that first lens assembly 100 lens barrel 102 and be mounted in first lens barrel 102 including first；Second camera lens
Four the second eyeglasses 201 that component 200 lens barrel 202 and be mounted in second lens barrel 202 including second, described four second
Eyeglass 201 and first eyeglass 101 collectively form imageable optical system, and first lens barrel 102 is using different
It is made in the material of second lens barrel 202.
Step S20 is pre-positioned step.First lens assembly 100 and second lens assembly 200 are made a reservation for
Position makes first eyeglass 101 collectively form imageable optical system at least one described second eyeglass 201.
Step S30, active calibration step.First lens assembly 100 and institute are adjusted and determined based on active calibration
State the relative position of the second lens assembly 200.
Step S40, adhesion step.First lens assembly 100 and second mirror are bonded by the first glue material 300
Head part 200.Gap of first glue material 300 between the first lens assembly 100 and the second lens assembly 200.Described first
Glue material 300 makes first lens assembly 100 and second lens assembly 200 be fixed and held at active calibration institute after solidifying
Determining relative position.
In the present embodiment, the first eyeglass 101 can be protected by selecting the material of the first lens barrel 102 appropriate, to reduce
After the completion of active calibration second mutation occurs for the shape of the first eyeglass 101 and position.Specifically, second mutation refers to baking
The change that optical system after solidification is occurred relative to optical system determined by active calibration.
Further, active calibration described herein can be in multiple degrees of freedom to 100 He of the first lens assembly
The relative position of second lens assembly 200 is adjusted.Fig. 6 A shows the active calibration in the utility model one embodiment
Middle relative position regulative mode.In the regulative mode, first lens assembly 100 (being also possible to the first eyeglass 101) can
To move relative to second lens assembly 200 along x, y, z direction, (the relative position adjustment i.e. in the embodiment has three
A freedom degree).Wherein the direction z is the direction along optical axis, and x, the direction y is the direction perpendicular to optical axis.X, the direction y is in
In one adjustment plane P, two components that can be analyzed to the direction x, y are translated in adjustment plane P.
Fig. 6 B shows the adjusting of the rotation in the active calibration of another embodiment of the utility model.In this embodiment,
Relative position adjusts other than the three degree of freedom with Fig. 6 A, also adds rotary freedom, the i.e. adjusting in the direction r.This reality
It applies in example, the adjusting in the direction r is the rotation in the adjustment plane P, i.e., around the axis perpendicular to the adjustment plane P
Rotation.
Further, Fig. 6 C shows in the active calibration of another embodiment of the utility model and increases the direction v, w
The relative position regulative mode of adjusting.Wherein, the direction v represents the rotation angle of xoz plane, and the direction w represents the rotation of yoz plane
The rotation angle in angle, the direction v and the direction w can synthesize an azimuth, this azimuth represents total heeling condition.That is,
It is adjusted by the direction v and the direction w, lateral attitude of adjustable first lens assembly 100 relative to the second lens assembly 200
(inclination of optical axis of the optical axis of namely described first lens assembly 100 relative to second lens assembly 200).
The adjusting of above-mentioned x, y, z, r, v, w six-freedom degree may influence the optical system image quality (such as
Influence the size of resolving power).In the other embodiments of the utility model, relative position regulative mode, which can be, only to be adjusted
Any one of six-freedom degree is stated, it can also wherein wantonly two or the combination of more.
Further, in one embodiment, in active calibration step, the movement further includes in the adjustment plane
Translation, i.e. movement on the direction x, y.
Further, in one embodiment, the active calibration further include: according to the actual measurement solution picture of the optical system
Power adjusts and determines the angle of axis of the axis of first lens assembly 100 relative to second lens assembly 200,
Adjusting i.e. on the direction w, v.In the optical lens or camera module assembled, the axis of first lens assembly 100 and institute
Stating can have the angle being not zero between the axis of the second lens assembly 200.
Further, in one embodiment, the active calibration further include: along the side perpendicular to the adjustment plane
It is determined to movement first lens assembly 100 (adjusting i.e. on the direction z) according to the actual measurement resolving power of the optical system
Between first lens assembly 100 and second lens assembly 200 perpendicular to it is described adjustment plane direction on
Relative position.
Further, in one embodiment, in the pre-determined bit step, make the bottom surface of first lens assembly 100
There is gap between the top surface of second lens assembly 200；And in the adhesion step, the glue material is arranged in described
Gap.
In one embodiment, in active calibration step, the second lens assembly 200 can be fixed, passes through fixture clamping the
One lens assembly 100, under the drive for six shaft movement mechanisms being connect with fixture, mobile first lens assembly 100, to realize
The relative movement under above-mentioned six-freedom degree between first lens assembly 100 and the second lens assembly 200.Wherein, fixture can
To bear against or partially bear against the side of the first lens assembly 100, so that the first lens assembly 100 be picked up.
Further, Fig. 4 A to Fig. 4 G shows the optical lens assemble method in the utility model one embodiment.Figure
4A shows the first lens assembly 100 and the second lens assembly 200 in discrete state, and arrow instruction direction shows first
The moving direction of lens assembly 100.Fig. 4 B, which is shown, is pre-positioned the first lens assembly 100 and the second lens assembly 200
And the schematic diagram of active calibration.Specifically, first lens assembly 100 and second lens assembly 200 are carried out pre-
Positioning makes first eyeglass 101 collectively form imageable optical system with four second eyeglasses 201, passes through outside
Absorb the first lens assembly of institutional adjustment 100 six axial coordinates, make actual measurement image quality it is up to standard (such as make survey resolving power reach
To threshold value), six coordinate positions of the first lens assembly 100 that then record keeps image quality up to standard.Fig. 4 C shows master
The schematic diagram of glue is drawn in 202 top surface of the second lens barrel after dynamic calibration.Specifically, after the completion of active calibration, by the first lens assembly
100 remove, and then the first glue material 300 are scribbled in 202 top surface of the second lens barrel of the second lens assembly 200, for the first camera lens part
The connection of part 100 and the second lens assembly 200 uses, and the first lens assembly 100 is removed in arrow expression in figure.Fig. 4 D is shown
After the first glue material 300 is scribbled in 202 top surface of the second lens barrel of the second lens assembly 200, outside intake mechanism is according to active calibration
Identified six coordinate positions (six coordinate positions recorded) restore the first lens assembly 100 to calibrating position.
Fig. 4 E shows procuring process.Specifically, after the first lens assembly 100 being moved to calibrating position, to the first glue material 300 into
Row exposure, carries out the precuring of the first glue material 300, and in exposure process, outside intake mechanism keeps the first lens assembly 100
In calibrating position.Arrow in Fig. 4 E is used for the light of the first glue material 300 exposure.After Fig. 4 F shows the solidification of the first glue material 300
State.After being exposed, outside intake mechanism is moved away from, the first lens assembly 100 relies on the first glue material 300 of precuring
It supports and fixes to be maintained at calibrating position.Fig. 4 G show it is permanent cured after state.After 300 precuring of the first glue material
Optical mirror slip is toasted, it can be achieved that permanent cured.In Fig. 4 G, the first glue material 300 is after overbaking by the first lens assembly
100 and second lens assembly 200 it is permanently connected, and be maintained at active calibration position shown in Fig. 4 B.
In this embodiment, the first glue material 300 painting is drawn between 102 bottom surface of 202 top surface of the second lens barrel and the first lens barrel,
In, gap is kept between the first eyeglass 101 and the second lens barrel 202；Optionally, the first glue material 300, which can also apply, is drawn in the first eyeglass
Between 202 top surface of 101 bottom surfaces and the second lens barrel, wherein keep gap between the first lens barrel 102 and the second lens barrel 202；It is optional
Ground, the first glue material 300, which can also apply, to be drawn between 202 top surface of the first lens barrel 102 and the second lens barrel and 101 bottom surface of the first eyeglass
Between 202 top surface of the second lens barrel.
Further, Fig. 5 A to Fig. 5 F shows the optical lens assemble method in another embodiment of the utility model.
202 top surface of the second lens barrel that Fig. 5 A shows the second lens assembly 200 has the schematic diagram of the first glue material 300, wherein second
The first glue material 300 is scribbled in 202 top surface of the second lens barrel of lens assembly 200, for the first lens assembly 100 and the second lens assembly
200 connection uses.Fig. 5 B shows the schematic diagram of clamping and mobile first lens assembly 100 to be pre-positioned, wherein
After the first glue material 300 is scribbled in 202 top surface of the second lens barrel of second lens assembly 200, using active calibration, to first camera lens
Component 100 and second lens assembly 200 are pre-positioned, and first eyeglass 101 and at least one described second mirror are made
Piece 201 collectively forms imageable optical system, and six axial coordinates of the first lens assembly of institutional adjustment 100 are absorbed by outside,
Keep the image quality of actual measurement (such as actual measurement resolving power is made to reach threshold value) up to standard, so that shifting to the first lens assembly 100 makes into
As quality six coordinate positions up to standard, arrow instruction direction shows the moving direction of the first lens assembly 100.Fig. 5 C shows
Go out and the first lens assembly 100 is moved to the schematic diagram after calibrating position, in the schematic diagram, the first mirror using active calibration
Contain the first glue material 300 between head part 100 and the second lens assembly 200, and is maintained at calibrating position with outside intake mechanism.
Fig. 5 D, which shows the first glue material 300 of exposure, makes the schematic diagram of its precuring, wherein moves to by the first lens assembly 100 the
After the first glue material 300 is scribbled in 202 top surface of the second lens barrel of two lens assemblies 200, while it being maintained at calibrating position, then to
One glue material 300 is exposed, and the precuring of the first glue material 300 is carried out, so that the first lens assembly 100 is maintained at calibration bits
It sets.Fig. 5 E shows the state after the first glue material 300 solidifies.After first glue material 300 is exposed, outside intake mechanism is moved
From the first lens assembly 100 is maintained at the schematic diagram of calibrating position.Fig. 5 F show it is permanent cured after state.By the first glue
The optical mirror slip of 300 precuring of material is toasted, it can be achieved that permanent cured.In Fig. 5 F, the first glue material 300 will after overbaking
First lens assembly 100 and the second lens assembly 200 are permanently connected, and are maintained at active calibration position shown in Fig. 5 C.
In this embodiment, the first glue material 300 painting is drawn between 102 bottom surface of 202 top surface of the second lens barrel and the first lens barrel,
In, gap is kept between the first eyeglass 101 and the second lens barrel 202；Optionally, the first glue material 300, which can also apply, is drawn in the first eyeglass
Between 202 top surface of 101 bottom surfaces and the second lens barrel, wherein keep gap between the first lens barrel 102 and the second lens barrel 202；It is optional
Ground, the first glue material 300, which can also apply, to be drawn between 202 top surface of the first lens barrel 102 and the second lens barrel and 101 bottom surface of the first eyeglass
Between 202 top surface of the second lens barrel.
Further, one embodiment according to the present utility model additionally provides a kind of camera module assemble method, packet
It includes: using the optical lens assemble method assembling optical lens of aforementioned any embodiment, then utilizing assembled optical lens
Make camera module.
Further, applicant has done further the thermal expansion coefficient, hydroscopicity and elasticity modulus of multiple material
Ground analysis, and a series of preferred embodiments are obtained based on analysis.
Wherein, hydroscopicity is referred to as water absorption rate, it indicates the ability that material absorbs water under normal atmospheric pressure.Table 1
Give the water absorption rate of some plastic materials.
Table 1
Reference table 1, in some embodiments of the utility model, the first lens barrel can be using water absorption rate less than 0.3%
Material, such as LCP, FR-PET, PI, PBT, PE, PP, PPO, PEI or AS etc..In addition, the water absorption rate due to metal material is usual
Less than 0.3%, therefore the first lens barrel can also be made of metal material.Material production the using water absorption rate less than 0.3%
One lens barrel, it is possible to reduce the variation of the first lens barrel shape or positional shift caused by moisture accumulation, to help to reduce the
One glue material solidify after optical system state and active calibration determined by difference between optical system state, and then ensure mirror
The image quality of head or mould group.And the material of the second lens barrel 202 still uses traditional material, such as the production of PC material.In this way, second
Lens assembly can still be made of traditional handicraft, helped to promote product yield and improved production efficiency.
Herein, related high molecular material and metal material are isotropic in three-dimensional, therefore heat is swollen
Swollen coefficient is linear expansion coefficient.
In one embodiment of the utility model, the first eyeglass can be made of glass material, and the first lens barrel is adopted
It is made of metal material.
In general, the thermal expansion coefficient of glass material are as follows: (5.8~150) × 10-7/℃。
The thermal expansion coefficient of some common Industrial Metal materials is as follows:
Copper: 1.7 × 10-5/ DEG C,
Aluminium: 2.3 × 10-5/ DEG C,
Iron: 1.2 × 10-5/ DEG C,
General carbon steel: 1.3 × 10-5/℃。
Glass is smaller than the thermal expansion coefficient of plastics, and metal lens barrel is in general also than the thermal expansion coefficient of plastics
It is small, therefore, using the collocation of glass lens and metal lens barrel, helps to reduce the first lens assembly and (such as dried because being heated
It is roasting) caused by deformation also can reduce moisture accumulation and cause and since metal lens barrel has lesser water absorption rate
The first lens barrel shape variation or positional shift.
It further, can be using oxygen-free copper as the first lens barrel material in a preferred embodiment of the utility model
Material.The thermal expansion coefficient of oxygen-free copper are as follows: 1.86 × 10-7/ DEG C, and using high-boron-silicon glass as the first lens materials.High borosilicate
The thermal expansion coefficient of glass are as follows: (3.3 ± 0.1) × 10-6/℃.The thermal expansion coefficients of both materials is close, can reduce the
One lens assembly is because of deformation caused by heated (such as baking), also, due to the water absorption rate very little of oxygen-free copper, this
Embodiment can also reduce the variation of the first lens barrel shape or positional shift caused by moisture accumulation.Therefore, the side of the present embodiment
Case is remarkably contributing to reduce optical system state determined by optical system state and active calibration after the first glue material solidifies
Between difference, and then ensure the image quality of camera lens or mould group.
In another embodiment of the utility model, the first eyeglass and the first lens barrel are all made of plastic material production.Wherein
First lens barrel can use the first plastic production, and the first eyeglass can use the second plastic production.First plastics and described
The difference of the thermal expansion coefficient of second plastics is 4 × 10-5/ DEG C within.
The material of common plastics eyeglass includes: PC or PMMA (polymethyl methacrylate), and PMMA is commonly called as organic glass
Or acrylic.
Wherein, PMMA thermal expansion coefficient are as follows: 7 × 10-5/ DEG C,
PC thermal expansion coefficient are as follows: (6.5~6.6) × 10-5/℃。
Sometimes, eyeglass can also be made of resin material, such as CR-39 (acrylic diglycol carbonates, also referred to as brother
Rival subresin or ADC resin), thermal expansion coefficient are as follows: 9~10 × 10-5/℃。
Table 2 further illustrates the thermal expansion coefficient of some plastics.
Table 2
| Material name | Linear expansion coefficient (DEG C ^-1) |
| PE (middle density) | 10×10^-5 |
| PC | (5~7) × 10^-5 |
| PBT | 110^-5 |
| PE (high density) | 22×10^-5； |
| PPO(NORYL) | 0.7 × 10^-5 |
| PP polypropylene | (5.8~10.2) 10^-5 |
| PEI | 5.6 × 10^-5 |
In table 2, symbol " ^ " indicates power, such as " 10^-5 " expression " 10-5”。
It further, can also be by selecting the material of the first lens barrel, to make the in some embodiments of the utility model
The elasticity of one lens barrel is greater than the elasticity of the first eyeglass, with the chucking power of the absorbing external fixture when the first lens barrel is clamped, in turn
Indirectly-acting is reduced in the power of the first eyeglass.Simultaneously lens barrel elasticity is good can be the first lens barrel with fixture unclamp after be easy to reply
The effect of original shape.Table 3 shows the elasticity modulus of some lens barrel materials.Table 4 shows the elasticity modulus of some lens materials.
Table 3
| Material name | Elasticity modulus (GPa) |
| PE (medium/low density) | 0.172 |
| FR-PET | 1.5-2 |
| POLIYIMSE | 1.07 |
| AS(ASN) | 1.93 |
| PC | 2.4-2.6 |
| PBT | 2.8 |
| PE (high density) | 2.914 |
| PPO(NORYL) | 2.32 |
| PP polypropylene | 4 |
| PEI | 10 |
| LCP | 11.7 |
Table 4
It in a preferred embodiment, can be using the first eyeglass of PMMA material and the first mirror of middle low density PE material
(it is 0.920~0.940 g/cm that middle low density PE material can be density to cylinder3Polythene material).In this way, the first lens barrel is not
Only there is the elasticity better than the first eyeglass, also there is the water absorption rate of very little, while the thermal expansion system of the first lens barrel and the second lens barrel
Several differences are 4 × 10-5/ DEG C within.The scheme of the present embodiment can reduce the first lens assembly and (such as be dried because heated
It is roasting) caused by deformation, the variation of the first lens barrel shape or positional shift caused by moisture accumulation can be reduced and can be led to
The elasticity for crossing the first lens barrel comes absorbing external intake mechanism to the active force of first eyeglass, is remarkably contributing to reduce first
Glue material solidify after optical system state and active calibration determined by difference between optical system state, and then ensure camera lens
Or the image quality of mould group.In the present embodiment, the second lens barrel can be made of traditional lens barrel material (such as PC material), this
Sample, the second lens assembly can still be made of traditional handicraft, helped to promote product yield and improved production efficiency.Big
In the case of scale volume production (such as volume production of mobile phone camera module), the camera module (or corresponding optical lens) of same type
Output is likely to be breached ten million even more than one hundred million order of magnitude, therefore the yield of product and production efficiency are very important.
Above description is only the better embodiment of the application and the explanation to institute's application technology principle.Art technology
Personnel should be appreciated that utility model range involved in the application, however it is not limited to which the specific combination of above-mentioned technical characteristic forms
Technical solution, while should also cover do not depart from the utility model design in the case where, by above-mentioned technical characteristic or its etc.
The other technical solutions for carrying out any combination with feature and being formed.Such as features described above and (but being not limited to) disclosed herein
Technical characteristic with similar functions is replaced mutually and the technical solution that is formed.
Claims (16)
1. a kind of optical lens characterized by comprising
First lens assembly comprising the first lens barrel and at least one first eyeglass being mounted in first lens barrel；
Second lens assembly comprising the second lens barrel and at least one second eyeglass being mounted in second lens barrel, it is described
At least one second eyeglass and first eyeglass collectively form imageable optical system, and the material of first lens barrel
Different from second lens barrel；And
First glue material, the first gap between the first lens assembly and the second lens assembly, first glue material are suitable for
First lens assembly and second lens assembly are supported and fixed after hardening, wherein the first lens assembly axis
There is the angle being not zero between the axis of second lens assembly.
2. optical lens according to claim 1, which is characterized in that first glue material is suitable for supporting and fixing described the
One lens assembly and second lens assembly, so that the relative position of first lens assembly and second lens assembly
Maintain relative position determined by active calibration.
3. optical lens according to claim 1, which is characterized in that the thermal expansion coefficient and the first mirror of first lens barrel
Difference between the thermal expansion coefficient of piece is less than first threshold.
4. optical lens according to claim 1, which is characterized in that the material hydroscopicity of the first lens barrel is less than described second
The material hydroscopicity of lens barrel.
5. optical lens described in any one of -4 according to claim 1, which is characterized in that first eyeglass is glass mirror
Piece, and first lens barrel is metal lens barrel.
6. optical lens according to claim 5, which is characterized in that first eyeglass is high-boron-silicon glass eyeglass, and
First lens barrel is oxygen-free copper lens barrel.
7. optical lens according to claim 1, which is characterized in that the elasticity modulus of materials of first lens barrel is less than institute
The elasticity modulus of materials of the first eyeglass is stated, with absorbing external intake mechanism to the active force of first eyeglass.
8. optical lens according to claim 7, which is characterized in that it is 0.920 that the material of first lens barrel, which is density,
~0.940g/cm3Polythene material, and the material of first eyeglass be polymethyl methacrylate materials.
9. optical lens described in any one of -4 according to claim 1, which is characterized in that the material of first lens barrel is
First plastics, the material of first eyeglass are the second plastics, and the thermal expansion system of first plastics and second plastics
Several differences are 4 × 10-5/ DEG C within.
10. optical lens according to claim 8, which is characterized in that the number of first eyeglass is less than described second
The number of eyeglass, and second eyeglass than first eyeglass close to sensitive chip.
11. optical lens according to claim 10, which is characterized in that the number of first eyeglass is one, and institute
The outer diameter for stating the first eyeglass is greater than second eyeglass of minimum outer diameter.
12. the optical lens according to any one of claim 8,10-11, which is characterized in that second lens barrel is adopted
Use makrolon material.
13. optical lens according to claim 9, which is characterized in that second lens barrel uses makrolon material.
14. optical lens according to claim 6, which is characterized in that first glue material be located at first eyeglass with
Between second lens barrel, non-filler between first lens barrel and second lens barrel.
15. optical lens according to claim 9, which is characterized in that first glue material be located at first eyeglass with
Between second lens barrel, non-filler between first lens barrel and second lens barrel.
16. a kind of camera module characterized by comprising optical lens described in any one of claim 1-15.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629848.4U CN208421364U (en) | 2018-04-28 | 2018-04-28 | optical lens and camera module |
| EP19792828.6A EP3761099B1 (en) | 2018-04-28 | 2019-04-26 | Optical lens assembly, camera module, and assembling method therefor |
| US17/042,713 US20210149145A1 (en) | 2018-04-28 | 2019-04-26 | Optical lens, camera module and assembly method therefor |
| PCT/CN2019/084449 WO2019206255A1 (en) | 2018-04-28 | 2019-04-26 | Optical lens assembly, camera module, and assembling method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629848.4U CN208421364U (en) | 2018-04-28 | 2018-04-28 | optical lens and camera module |
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| CN208421364U true CN208421364U (en) | 2019-01-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412707A (en) * | 2018-04-28 | 2019-11-05 | 宁波舜宇光电信息有限公司 | Optical lens, camera module and its assemble method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110412707A (en) * | 2018-04-28 | 2019-11-05 | 宁波舜宇光电信息有限公司 | Optical lens, camera module and its assemble method |
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