CN110320625A - Optical lens, camera module and its assemble method - Google Patents
Optical lens, camera module and its assemble method Download PDFInfo
- Publication number
- CN110320625A CN110320625A CN201810274229.2A CN201810274229A CN110320625A CN 110320625 A CN110320625 A CN 110320625A CN 201810274229 A CN201810274229 A CN 201810274229A CN 110320625 A CN110320625 A CN 110320625A
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- China
- Prior art keywords
- lens
- lens assembly
- eyeglass
- optical
- assembly
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
Abstract
The present invention provides a kind of optical lens, comprising: the first lens assembly comprising at least one first eyeglass；Second lens assembly, it includes the second lens barrel and at least one second eyeglass for being mounted in second lens barrel, at least one described first eyeglass and at least one described second eyeglass collectively form imageable optical system, and have at least one free surface lens at least one described first eyeglass and at least one described second eyeglass；And connection medium, it is suitable for for first lens assembly and second lens assembly being fixed together.The present invention also provides corresponding camera module and optical lens and camera module assemble method.The present invention can reduce small size, large aperture optical lens distortion, camera module optics overall length can be reduced, free surface lens product bad problem caused by the position inaccurate of direction of rotation in lens barrel can be effectively avoided, the installation accuracy of free surface lens can be effectively improved.
Description
Technical field
The present invention relates to optical image technology fields, specifically, the present invention relates to optical lens, camera module and its groups
Dress method.
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.Large aperture camera lens can bring big field angle, however, this also cause camera lens optics overall length it is elongated and view
Distort larger problem for rink corner.Such as the mobile lens of 130 ° of field angles, distortion > 10%.In the field of compact sized optical device,
The above problem will be protruded more, it is difficult to be solved.
In recent years, free form surface (FREE-FORM) technology reaches its maturity, and can get using free form surface technology is had freely
The eyeglass of curved surface.Based on free form surface technology, Random Curved Surface Designing software can be passed through in optical design by progressive additional
Face type is machined in the front or rear surface of eyeglass, then for example, by lathe process complex surface.Currently, free form surface technology is in height
End spectacle lens industry obtains relatively broad application.If free surface lens to be used for the field (example of compact sized optical device
Such as mobile phone camera module field), it will help it reduces the distortion of big field angle and reduces the light of camera module to a certain extent
Learn overall length.By taking above-mentioned 130 ° of field angle mobile lens as an example, utilize free surface lens, it is contemplated that can reduce distortion to 2% with
Under.If free surface lens are used to do common auto-focusing mould group, optics can be reduced and be always about 10%, MTF design value
8% is promoted, distortion can be reduced to 1% or less.In other words, free surface lens can reduce or minimize optical system
Aberration realizes aberration correction, reduces the function of distortion, can also play the effect for reducing mould group optics overall length and/or modular volume
Fruit.
However, free form surface be it is a kind of complicated aspherical, be in most cases it is random asymmetrical, have more
Fold symmetry axis.And in the field of compact sized optical device (such as mobile phone camera module field), typical optics currently on the market
Camera lens is assembled by way of being embedded in piecewise.Specifically, the lens barrel that inside has step-like breasting face is prepared in advance,
Then each eyeglass is embedded in the step-like breasting face on the inside of the lens barrel piecewise to obtain complete optical lens.Due to mounting process
Limitation, eyeglass face type selected in lens barrel is usually the spherical surface or aspherical with rotational symmetry.If using certainly
By curve lens, the packaging technology of conventional compact camera module group lens just can not be installed accurately.Because having certainly
By in the optical system of curve lens, since non-rotationally-symmetric free surface lens keep its right since there is no single optical axis
Claim, it is difficult to find optical center, optical axis alignment and Correction Problemss are unable to control.The eyeglass face molded dimension of camera module usually < 0.7cm,
In the eyeglass installation of small size, higher installation requirement is needed, it is also desirable to more quick erectility.Problem above is all led
Free surface lens are caused to be dfficult to apply to compact camera module.
Summary of the invention
The present invention is intended to provide a kind of solution at least one defect that can overcome the prior art.
According to an aspect of the invention, there is provided a kind of optical lens, comprising: the first lens assembly comprising at least
One the first eyeglass；Second lens assembly comprising the second lens barrel and be mounted in second lens barrel at least one second
Eyeglass, at least one described first eyeglass and at least one described second eyeglass collectively form imageable optical system, and
There are at least one free surface lens at least one described first eyeglass and at least one described second eyeglass；And connection
Medium, suitable for first lens assembly and second lens assembly are fixed together.
In one embodiment, the connection medium is glue material, is suitable for supporting and fixes first lens assembly
With second lens assembly, and make the relative position of first lens assembly and second lens assembly keep actively
Relative position determined by calibrating.In another embodiment, connection medium can also be welding medium.
In one embodiment, have between the axis of first lens assembly and the axis of second lens assembly
There is the angle being not zero.
In one embodiment, the number of first eyeglass is one, and first eyeglass is free-form curved mirror
Piece.
In one embodiment, the number of at least one second eyeglass is multiple, and it is described at least one the
There are a free surface lens in two eyeglasses.
In one embodiment, at least one described first eyeglass have free surface lens, and it is described at least
Also there are free surface lens in one the second eyeglass.
In one embodiment, first lens assembly further includes the first lens barrel, and it is described at least one first
Eyeglass is installed on the inside of first lens barrel.
In one embodiment, first lens assembly and/or second lens assembly are wrapped with it is characterized
The mark of the face type directional information of the free surface lens contained.
In one embodiment, the free surface lens have the datum plane perpendicular to its thickness direction, described
Free surface lens have reference direction, first lens assembly and/or second camera lens part in the datum plane
Part has the mark of the reference direction to characterize the face type directional information of the free surface lens.
In one embodiment, the connection medium is glue material, is suitable for supporting and fixes first lens assembly
With second lens assembly, and make the free surface lens reference direction and optical design determined by benchmark
The difference in direction is not more than 0.05 degree.
In one embodiment, on the optical axis direction along the optical lens, first lens assembly and institute
Stating has gap between the second lens assembly.
According to another aspect of the present invention, any one of a kind of camera module, including aforementioned embodiments are additionally provided
The optical lens.
According to another aspect of the present invention, optical lens assemble method is additionally provided, comprising: prepare first be separated from each other
Lens assembly and the second lens assembly, wherein first lens assembly includes at least one first eyeglass, second camera lens
Component includes the second lens barrel and at least one second eyeglass for being mounted in second lens barrel, and it is described at least one first
There are at least one free surface lens in eyeglass and at least one described second eyeglass；To first lens assembly and described
Second lens assembly is pre-positioned, and collectively forming at least one described first eyeglass and at least one described second eyeglass can
The optical system of imaging；The phase of first lens assembly and second lens assembly is adjusted and determined based on active calibration
To position；And first lens assembly and second lens assembly are bonded by glue material, make first lens assembly
Relative position determined by active calibration is fixed and held at second lens assembly.
In one embodiment, there is at least one certainly in the preparation process, at least one described first eyeglass
By curve lens, and also there are at least one free surface lens at least one described second eyeglass.
In one embodiment, the active calibration includes: the actual measurement resolving power according to the optical system, passes through folder
Hold or adsorb first lens assembly and/or second lens assembly, come adjust and determine first lens assembly and
The relative positional relationship of second lens assembly.
In one embodiment, the active calibration further include: by adjusting first lens assembly and described the
The relative positional relationship of two lens assemblies, to make determined by reference direction and the optical design of the free surface lens
The difference of reference direction is not more than 0.05 degree, wherein the reference direction is used to characterize the face type direction of the free surface lens
Information.
In one embodiment, the active calibration further include: along adjustment the first lens assembly of planar movement, according to
The actual measurement resolving power of the optical system, determine between first eyeglass and second lens assembly along the plane
Moving direction on relative position, wherein the movement include it is described adjustment plane on rotation.
In one embodiment, in the active calibration step, the movement further includes in the adjustment plane
Translation.
In one embodiment, the active calibration further include: according to the actual measurement resolving power of the optical system, adjust
And determine the angle of axis of the axis of first lens assembly relative to second lens assembly.
In one embodiment, the active calibration further include: moved along the direction perpendicular to the adjustment plane
First lens assembly determines first lens assembly and described second according to the actual measurement resolving power of the optical system
The relative position in the direction perpendicular to the adjustment plane between lens assembly.
In one embodiment, in the preparation process, first lens assembly further includes the first lens barrel, and institute
State the inside that at least one first eyeglass is installed on first lens barrel.
In one embodiment, in the pre-determined bit step, make the bottom surface and described second of first lens assembly
There is gap between the top surface of lens assembly；And in the adhesion step, the glue material is arranged in the gap.
According to another aspect of the present invention, a kind of camera module assemble method is additionally provided, comprising: utilize aforementioned any one
The optical lens assemble method of a embodiment assembles optical lens；And camera module is assembled based on the optical lens.
Compared with prior art, the present invention has at least one following technical effect:
1, the present invention can be abnormal to reduce by the way that free surface lens are applied to small size, the optical lens of large aperture
Become.
2, the present invention can by by free surface lens be applied to high pixel, small size, large aperture camera module come
Reduce distortion.
3, the present invention can reduce camera module optics overall length, to reduce the volume of camera module.
4, undesirable rotation or rotation occur in lens barrel for free surface lens when assembling can be effectively avoided in the present invention
Turn the bad problem of product caused by the position inaccurate in direction.Free surface lens assembly error especially rotation error it is quick
Sensitivity is very high, if assembling optical lens or camera module containing free surface lens, free-form curved mirror based on traditional handicraft
Piece is easy to happen the position inaccurate of undesirable rotation or direction of rotation in lens barrel, and then product image quality is caused not reach
The problems such as mark can not even be imaged.And the present invention can efficiently solve the above problem.
5, the present invention can effectively improve free surface lens in the installation accuracy of compact sized optical device field, thus
Improve the image quality of optical lens or camera module.
6, the present invention can effectively improve the production efficiency of optical lens or camera module containing free surface lens with
And product yield is promoted, it is suitable for producing in enormous quantities.
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 1000 of one embodiment of the invention；
Fig. 2 shows the stereoscopic schematic diagrams of a free surface lens in one embodiment of the invention；
Fig. 3 shows the diagrammatic cross-section of the camera module 2000 of one embodiment of the invention；
Fig. 4 shows the diagrammatic cross-section of the optical lens 1000a of another embodiment of the present invention；
Fig. 5 shows the diagrammatic cross-section of the photosensory assembly 2000a of the optical lens 1000a based on Fig. 4；
Fig. 6 shows the diagrammatic cross-section of the optical lens 1000b of another embodiment of the present invention；
Fig. 7 shows the diagrammatic cross-section of the photosensory assembly 2000b of the optical lens 1000b based on Fig. 6；
Fig. 8 shows the flow chart of the optical lens assemble method in one embodiment of the invention；
Fig. 9 a shows relative position regulative mode in the active calibration in one embodiment of the invention；
Fig. 9 b shows the adjusting of the rotation in the active calibration of another embodiment of the present invention；
Fig. 9 c shows the relative position for increasing the adjusting of the direction v, w in the active calibration of another embodiment of the invention
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 1000 of one embodiment of the invention.The optical lens 1000 packet
It includes the first lens assembly 100, the second lens assembly 200 and bonds first lens assembly 100 and the second lens assembly 200
Glue material (not shown) together.Wherein, the first lens assembly 100 includes the first lens barrel 101 and first eyeglass
102, and the first eyeglass 102 is free surface lens.Second lens assembly 200 includes the second lens barrel 201 and five the second eyeglasses
202.Glue material is arranged in the gap 400 between the first lens assembly 100 and the second lens assembly 200, by first mirror
Head part 100 and second lens assembly 200 are fixed together.In the present embodiment, which supports and fixes described first
Lens assembly and second lens assembly, and make the relative position of first lens assembly and second lens assembly
Keep relative position determined by active calibration.
In the present embodiment, free surface lens have to be processed to form complicated light based on free form surface (FREE-FORM) technology
Learn surface.The complex optical surfaces can for example pass through Random Curved Surface Designing software for progressive additional face type in optical design
Design on the front or rear surface of eyeglass, then for example, by refined and polished on high-precision numerically controlled lathe and etc. processing
And it obtains.Fig. 2 shows the stereoscopic schematic diagrams of a free surface lens in one embodiment of the invention.It, can be with reference to Fig. 2
Find out that free form surface is a kind of complicated aspherical, is in most cases random asymmetrical.For free-form curved mirror
For piece, there is very strong directionality in the plane perpendicular to its thickness direction.It, can be by actively in the present embodiment
Calibration phase adjusts the relative positional relationship of first lens assembly 100 and second lens assembly 200, come make it is described from
The difference of the reference direction determined by the reference direction of curve lens and optical design is no more than 0.05 degree (described in wherein
Reference direction is used to characterize the face type directional information of the free surface lens), then supported again with the glue material for being located at gap 400
And fixed first lens assembly 100 and second lens assembly 200, so that first lens assembly 100 and described
The relative position of second lens assembly 200 keeps relative position determined by active calibration, to guarantee the imaging of optical lens
Quality.
In contrast, in traditional optical lens packaging technology, multiple lens sets are loaded in same lens barrel.And non-rotation
Turning symmetrical free surface lens does not have the symmetrical intrinsic property of optical axis, that is, cannot rely on the optical axis of eyeglass and carry out group and load onto
The operation such as positioning, adjustment, cause assembly difficulty very big, especially rotation of the free surface lens in traditional handicraft in lens barrel
It is extremely difficult to turn positioning.In other words, the susceptibility of free surface lens assembly error especially rotation error is very high, if base
Optical lens or camera module containing free surface lens are assembled in traditional handicraft, free surface lens are easy hair in lens barrel
The position inaccurate of raw undesirable rotation or direction of rotation, and then cause product image quality not up to standard or even can not be imaged
Problem.
Further, Fig. 3 shows the diagrammatic cross-section of the camera module 2000 of one embodiment of the invention.The camera shooting mould
Group 2000 includes optical lens 1000 and photosensory assembly 300 as shown in Figure 1.The photosensory assembly 300 include wiring board 301,
The cylindrical support for installing the sensitive chip 302 in assist side 301, installing in assist side 301 and surrounding the sensitive chip
Body 303 and the colour filter 304 being mounted on cylindrical support body 303.Further, the second lens assembly 200 can also include
Motor, the second lens barrel 202 may be mounted in the carrier of motor.The top surface of the cylindrical support body 303 install the motor from
And the second lens assembly 200 is fixed together with photosensory assembly 300.It is noted that in other embodiments of the invention, horse
Up to can also be replaced by the other structures of such as cylindrical support body, or it can also be cancelled and directly pacify the second lens barrel 201
Mounted in the top surface of cylindrical support body 303.It may be noted that the motor can also be caused by other types of optics in other embodiments
Dynamic device replacement, such as SMA (marmem) actuator, MEMS actuator etc..Wherein, optical actuator refers to for promoting
The optical lens device mobile relative to sensitive chip.
Above-described embodiment can be abnormal to reduce by the way that free surface lens are applied to small size, the optical lens of large aperture
Become, it can be by the way that free surface lens be reduced distortion applied to the camera module of high pixel, small size, large aperture；It can be with
Camera module optics overall length is reduced, to reduce the volume of camera module；Free surface lens when assembling can be effectively avoided
Occur in lens barrel it is undesirable rotation or direction of rotation position inaccurate caused by the bad problem of product.
Further, in one embodiment, ruler of the gap 400 on the optical axis direction along the optical lens
Very little is 30-100 μm.
Further, Fig. 4 shows the diagrammatic cross-section of the optical lens 1000a of another embodiment of the present invention.Such as Fig. 4 institute
Show, the present embodiment and optical lens 1000 shown in FIG. 1 difference are there is free surface lens in the second lens assembly 200
109.First eyeglass of the first lens assembly 100 is using conventional eyeglass.Further, Fig. 5 shows the optical lens based on Fig. 4
The diagrammatic cross-section of the photosensory assembly 2000a of 1000a.
Further, Fig. 6 shows the diagrammatic cross-section of the optical lens 1000b of another embodiment of the present invention.Such as Fig. 6 institute
Show, the present embodiment and optical lens 1000 shown in FIG. 1 difference are in the first lens assembly 100 and the second lens assembly 200
It is respectively provided with free surface lens 109a and 109b.It, can be by adjusting described first in the active calibration stage under this design
The relative position of lens assembly 100 and second lens assembly 200 makes the face type side of free surface lens 109a and 109b
It is complementary to being formed, to preferably adjust the actual imaging quality of optical system.Further, Fig. 7 shows the light based on Fig. 6
Learn the diagrammatic cross-section of the photosensory assembly 2000b of camera lens 1000b.As can the active calibration stage can by adjust described in
The relative position of first lens assembly 100 and second lens assembly 200 makes the face of free surface lens 109a and 109b
Type direction forms complementation, therefore camera module 2000b can have better image quality.
It is noted that the eyeglass number of the first lens assembly and the second lens assembly can be according to need in above-described embodiment
It adjusts.Such as first the number of lenses of lens assembly and the second lens assembly can be respectively two and four, can also be respectively
Three and three, it can also be respectively four and two, can also be respectively five and one.The eyeglass sum of entire optical lens can also basis
It needs to adjust, such as the eyeglass sum of optical lens can be six, be also possible to five or seven.
It is also important to note that the optical lens of the application, lens assembly is not limited to two, such as the number of lens assembly can also
To be the numbers for being greater than two such as three or four.It, can be by adjacent two when the lens assembly for forming optical lens is more than two
Lens assembly is respectively seen as previously described first lens assembly and previously described second lens assembly.For example, working as optical frames
Head lens assembly number be three when, optical lens may include two the first lens assemblies and be located at the two first camera lens parts
Second lens assembly between part, and all first eyeglasses and second camera lens part of the two the first lens assemblies
All second eyeglasses of part collectively form carry out active calibration can image optics system.When the number of the lens assembly of optical lens
When being four, optical lens may include two the first lens assemblies and two the second lens assemblies, and press the first lens assembly, second
Lens assembly, the first lens assembly, the second lens assembly order arrange from top to bottom, and the two the first lens assemblies
All second eyeglasses of all first eyeglasses and two the second lens assemblies collectively form carry out active calibration can image optics
System.Suchlike other deformations no longer repeat one by one herein.
Further, Fig. 8 shows the flow chart of the optical lens assemble method in one embodiment of the invention.With reference to figure
8, this method comprises:
Step 10, prepare the first lens assembly being separated from each other and the second lens assembly, wherein first lens assembly
Including the first lens barrel and at least one first eyeglass being mounted in first lens barrel, second lens assembly includes second
Lens barrel and at least one second eyeglass being mounted in second lens barrel.Wherein, it in the first eyeglass and the second eyeglass, at least deposits
In a free surface lens.
Step 20, first lens assembly and second lens assembly are pre-positioned, make it is described at least one
Second eyeglass and at least one described first eyeglass collectively form imageable optical system.
Step 30, the phase of first lens assembly and second lens assembly is adjusted and determined based on active calibration
To position.
Step 40, first lens assembly and second lens assembly are bonded by glue material.In this step, using admittedly
The glue material of change supports and fixes first lens assembly and second lens assembly, so that first lens assembly and institute
The relative position for stating the second lens assembly is maintained at through relative position determined by active calibration.
It further, in one embodiment, can be before executing step 30, in first lens assembly and described
Gap between two lens assemblies carries out glue material coating, executes step 30 again then to adjust and determine the first lens assembly and the
The relative position of two lens assemblies.After determining the relative position, executing step 40 solidifies glue material, to utilize cured glue
Material supports first lens assembly and second lens assembly, and then makes first lens assembly and second camera lens
The relative position of component is maintained at through relative position determined by active calibration.And in another embodiment, it can first hold
Row step 30 is to adjust and determine the relative position of the first lens assembly and the second lens assembly.After determining the relative position,
Temporarily the first lens assembly (or second lens assembly) is removed, then carries out glue material coating, then based on identified opposite position
It sets and is moved back to the first lens assembly (or second lens assembly).Final curing glue material makes first lens assembly and described
The relative position of two lens assemblies is maintained at through relative position determined by active calibration.
Further, active calibration described herein can be in multiple degrees of freedom to the first lens assembly and second
The relative position of lens assembly is adjusted.Fig. 9 a shows relative position tune in the active calibration in one embodiment of the invention
Section mode.In the regulative mode, first lens assembly (being also possible to the first eyeglass) can be relative to second mirror
Head part moves (the relative position adjustment i.e. in the embodiment has three degree of freedom) along x, y, z direction.Wherein the direction z is
Along the direction of optical axis, x, the direction y is the direction perpendicular to optical axis.X, the direction y is in an adjustment plane P, in the tune
Translation can be analyzed to two components in the direction x, y in the P of leveling face.
Fig. 9 b shows the adjusting of the rotation in the active calibration of another embodiment of the present invention.In this embodiment, relatively
Position adjusts other than the three degree of freedom with Fig. 9 a, also adds rotary freedom, the i.e. adjusting in the direction r.The present embodiment
In, the adjusting in the direction r is the rotation in the adjustment plane P, i.e. the rotation around the axis perpendicular to the adjustment plane P
Turn.
Further, Fig. 9 c shows in the active calibration of another embodiment of the invention and increases the adjusting of the direction v, w
Relative position regulative mode.Wherein, the direction v represents the rotation angle of xoz plane, and the direction w represents the rotation angle of yoz plane, the side v
An azimuth can be synthesized to the rotation angle with the direction w, this azimuth represents total heeling condition.That is, passing through the side v
It is adjusted to the direction w, lateral attitude (namely described first of adjustable first lens assembly relative to the second lens assembly
Inclination of the optical axis of lens assembly relative to the optical axis of second lens assembly).
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 other embodiments of the invention, relative position regulative mode, which can be, only adjusts above-mentioned six
Any one of a freedom degree, can also wherein wantonly two or the combination of more.
Particularly, in one embodiment, the active calibration includes at least the calibration in the direction r.Specifically, the master
Dynamic calibration steps (step 30) includes: that (in the present invention, resolving power can pass through reality according to the actual measurement resolving power of the optical system
The MTF curve or SFR curve of survey obtain, but the method for obtaining resolving power is without being limited thereto), by clamping or adsorbing first mirror
Head part and/or second lens assembly, to adjust and determine first lens assembly and second lens assembly
Relative positional relationship.Wherein, along adjustment the first lens assembly of planar movement, according to the actual measurement resolving power of the optical system,
Determine the relative position on the moving direction along the plane between first eyeglass and second lens assembly,
Described in movement include it is described adjustment plane on rotation, i.e. movement on the direction r.In the present embodiment, first camera lens
Component and/or second lens assembly have the mark for the face type directional information for characterizing its free surface lens for being included
Know.
In one embodiment, the free surface lens have perpendicular to its thickness direction datum plane, it is described from
There is reference direction, first lens assembly and/or second lens assembly in the datum plane by curve lens
Mark with the reference direction is to characterize the face type directional informations of the free surface lens.Free surface lens to
Rotational positioning in the datum plane is very sensitive, and in the active calibration stage, make the first lens assembly and the second camera lens part
Part is relatively moved and is adjusted along the direction r, and the installation accuracy in the reference direction of free surface lens can be improved.Such as it can be with
So that the difference of reference direction determined by the reference direction of the free surface lens and optical design is not more than 0.05
Degree, and then obtain small size, large aperture optical lens or the camera module with high image quality.In the present embodiment, in freedom
When curve lens carry out rotation correction with respect to other camera lenses, it can acquire and obtain in real time aberration adjustment data and correct, finally
So that the camera lens and/or camera module with free surface lens obtains more excellent imaging effect.By adjusting so that two
Optical system composed by lens assembly is small with preferable imaging performance, such as the surrounding amount of distortion of imaging, optical system
Aberration is small.The adjustment index of active calibration can different demands be configured.So that the active school of different adjustment indexs
Optical lens after standard meets different optical properties.
On the other hand, pre-determined bit the stage, the mark of reference direction can help free surface lens be quickly pre-positioned to
On direction determined by optical design, active accommodation is then carried out on the basis of pre-determined bit again.It will be helpful to improve light in this way
Learn the production efficiency of camera lens or camera module.It in another embodiment, can also be based on machine vision technique to free form surface
The face type direction of eyeglass carries out machine recognition, and the pre-determined bit in the direction r is carried out based on recognition result, then again in the base of pre-determined bit
Active accommodation is carried out on plinth.
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 relative to second lens assembly, i.e. w, the side v
Upward adjusting.In the optical lens or camera module assembled, the axis of first lens assembly and second camera lens
It can have the angle being not zero between the axis of component.
Further, in one embodiment, the active calibration further include: along the side perpendicular to the adjustment plane
To movement first lens assembly (adjusting i.e. on the direction z), according to the actual measurement resolving power of the optical system, determine described in
The relative position in the direction perpendicular to the adjustment plane between first lens assembly and second lens assembly.
Further, in one embodiment, in the pre-determined bit step (step 20), make first lens assembly
There is gap between bottom surface and the top surface of second lens assembly；And in the adhesion step (step 40), the glue material
It is arranged in the gap.
Further, in one embodiment, in the preparation process (step 10), first lens assembly can be with
Without the first lens barrel.Such as first lens assembly can be made of single first eyeglass.Pre-determined bit step (the step 20)
In, make that there is gap between the bottom surface of first eyeglass and the top surface of second lens assembly；And the adhesion step
In (step 40), the glue material is arranged in the gap.In the present embodiment, the first eyeglass can form one by being fitted into mutually
Multiple sub- eyeglasses formed.In the present embodiment, the side and top surface in the non-optical face for being not used in imaging of the first eyeglass can be with shapes
At light shield layer.The light shield layer can be formed by the side of the first eyeglass and top surface silk-screen printing light screening material.
In one embodiment, in active calibration step, the second lens assembly can be fixed, the first mirror is clamped by fixture
Head part, under the drive for six shaft movement mechanisms being connect with fixture, mobile first lens assembly, to realize the first camera lens part
The relative movement under above-mentioned six-freedom degree between part and the second lens assembly.Wherein, fixture can be born against or part is held
It is against the side of the first lens assembly, so that the first lens assembly be picked up.
Further, according to one embodiment of present invention, a kind of camera module assemble method is additionally provided, comprising: benefit
Optical lens is assembled with the optical lens assemble method of aforementioned any embodiment, then utilizes assembled optical lens to make and takes the photograph
As mould group.
Further, according to another embodiment of the invention, the stream of another camera module assemble method is additionally provided
Cheng Tu, this method comprises:
Step 100, prepare the first lens assembly and camera module component, wherein the camera module component includes being incorporated in
The second lens assembly and photosensitive mould group together, and first lens assembly includes the first lens barrel and is mounted on described first
At least one first eyeglass in lens barrel, second lens assembly include the second lens barrel and are mounted in second lens barrel
At least one second eyeglass.Also, at least there are a free surface lens in the first eyeglass and the second eyeglass.
Step 200, first lens assembly and second lens assembly are pre-positioned, make it is described at least one
Second eyeglass and at least one described first eyeglass collectively form imageable optical system.
Step 300, first lens assembly and second lens assembly are adjusted and determined based on active calibration
Relative position.
Step 400, first lens assembly and second lens assembly are bonded by glue material.
As can be seen that the second lens assembly and photosensitive mould group are first assembled in one in the present embodiment compared with previous embodiment
It rises and constitutes camera module component, then camera module component and the first lens assembly are assembled again, obtain complete camera module.
The process that camera module component and the first lens assembly are assembled can also there are many deformations, such as can refer to previously described light
Learn multiple embodiments of lens assembling method, the assembling of Lai Shixian camera module component and the first lens assembly.
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 invention scope involved in the application, however it is not limited to skill made of the specific combination of above-mentioned technical characteristic
Art scheme, while should also cover in the case where not departing from the inventive concept, by above-mentioned technical characteristic or its equivalent feature into
Row any combination and the other technical solutions formed.Such as features described above and (but being not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (23)
1. a kind of optical lens characterized by comprising
First lens assembly comprising at least one first eyeglass；
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 first eyeglass and at least one described second eyeglass collectively form imageable optical system, and described at least one
There are at least one free surface lens in a first eyeglass and at least one described second eyeglass；And
Medium is connected, suitable for first lens assembly and second lens assembly are fixed together.
2. optical lens according to claim 1, which is characterized in that the connection medium is glue material, is suitable for support simultaneously
Fixed first lens assembly and second lens assembly, and make first lens assembly and second camera lens part
The relative position of part keeps relative position determined by active calibration.
3. optical lens according to claim 2, which is characterized in that the axis of first lens assembly and described second
There is the angle being not zero between the axis of lens assembly.
4. optical lens according to claim 1, which is characterized in that the number of first eyeglass is one, and described
First eyeglass is free surface lens.
5. optical lens according to claim 1, which is characterized in that the number of at least one second eyeglass is more
It is a, and there are a free surface lens at least one described second eyeglass.
6. optical lens according to claim 1, which is characterized in that at least one described first eyeglass certainly with one
By curve lens, and there are a free surface lens at least one described second eyeglass.
7. optical lens according to claim 1, which is characterized in that first lens assembly further includes the first lens barrel,
And at least one described first eyeglass is installed on the inside of first lens barrel.
8. optical lens according to claim 1, which is characterized in that first lens assembly and/or second mirror
Head part has the mark for the face type directional information for characterizing its free surface lens for being included.
9. optical lens according to claim 8, which is characterized in that the free surface lens have perpendicular to its thickness
The datum plane in direction, the free surface lens have reference direction, first lens assembly in the datum plane
And/or second lens assembly has the mark of the reference direction to characterize the face type direction letter of the free surface lens
Breath.
10. optical lens according to claim 9, which is characterized in that the connection medium is glue material, is suitable for support simultaneously
Fixed first lens assembly and second lens assembly, and make the reference direction of the free surface lens with
The difference of reference direction determined by optical design is not more than 0.05 degree.
11. optical lens according to claim 1, which is characterized in that on the optical axis direction along the optical lens,
There is gap between first lens assembly and second lens assembly.
12. a kind of camera module, which is characterized in that including the optical lens as described in any one of claim 1-11.
13. a kind of optical lens assemble method characterized by comprising
Prepare the first lens assembly and the second lens assembly being separated from each other, wherein first lens assembly includes at least one
First eyeglass, second lens assembly include the second lens barrel and at least one second mirror for being mounted in second lens barrel
Piece, and there are at least one free surface lens at least one described first eyeglass and at least one described second eyeglass；
First lens assembly and second lens assembly are pre-positioned, at least one described first eyeglass and institute are made
It states at least one second eyeglass and collectively forms imageable optical system；
The relative position of first lens assembly and second lens assembly is adjusted and determined based on active calibration；And
First lens assembly and second lens assembly are bonded by glue material, makes first lens assembly and described
Two lens assemblies are fixed and held at relative position determined by active calibration.
14. optical lens assemble method according to claim 13, which is characterized in that in the preparation process, it is described extremely
There are at least one free surface lens in few first eyeglass, and also have at least one at least one described second eyeglass
A free surface lens.
15. optical lens assemble method according to claim 13, which is characterized in that the active calibration includes: basis
The actual measurement resolving power of the optical system, by clamping or adsorbing first lens assembly and/or second lens assembly,
To adjust and determine the relative positional relationship of first lens assembly and second lens assembly.
16. optical lens assemble method according to claim 15, which is characterized in that the active calibration further include: logical
The relative positional relationship of first lens assembly and second lens assembly is overregulated, to make the free surface lens
The difference of reference direction determined by reference direction and optical design is not more than 0.05 degree, wherein the reference direction is used for
Characterize the face type directional information of the free surface lens.
17. optical lens assemble method according to claim 15, which is characterized in that the active calibration further include: edge
The first lens assembly of adjustment planar movement first eyeglass and institute are determined according to the actual measurement resolving power of the optical system
State the relative position on the moving direction along the plane between the second lens assembly, wherein the movement be included in it is described
Adjust the rotation in plane.
18. optical lens assemble method according to claim 17, which is characterized in that in the active calibration step, institute
Stating movement further includes the translation in the adjustment plane.
19. optical lens assemble method according to claim 15, which is characterized in that the active calibration further include: root
According to the actual measurement resolving power of the optical system, adjusts and determine the axis of first lens assembly relative to second camera lens
The angle of the axis of component.
20. optical lens assemble method according to claim 17, which is characterized in that the active calibration further include: edge
Perpendicular to the adjustment plane mobile first lens assembly in direction, according to the actual measurement resolving power of the optical system,
Determine the phase in the direction perpendicular to the adjustment plane between first lens assembly and second lens assembly
To position.
21. optical lens assemble method according to claim 16, which is characterized in that in the preparation process, described
One lens assembly further includes the first lens barrel, and at least one described first eyeglass is installed on the inside of first lens barrel.
22. optical lens assemble method according to claim 16, which is characterized in that in the pre-determined bit step, make institute
Stating has gap between the bottom surface of the first lens assembly and the top surface of second lens assembly；And
In the adhesion step, the glue material is arranged in the gap.
23. a kind of camera module assemble method, which is characterized in that utilize the light as described in any one of claim 13-22
It learns lens assembling method and assembles optical lens；And
Camera module is assembled based on the optical lens.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274229.2A CN110320625A (en) | 2018-03-29 | 2018-03-29 | Optical lens, camera module and its assemble method |
| TW108108070A TWI756521B (en) | 2018-03-29 | 2019-03-11 | Optical lens, camera module and assembly method thereof |
| KR1020207024042A KR102540411B1 (en) | 2018-03-29 | 2019-03-12 | Optical lens, imaging module and method for assembling the same |
| EP19775617.4A EP3761098B1 (en) | 2018-03-29 | 2019-03-12 | Optical camera lens, camera module and assembly method thereof |
| PCT/CN2019/077765 WO2019184695A1 (en) | 2018-03-29 | 2019-03-12 | Optical lens and camera module and assembling method therefor |
| US17/041,814 US20210011264A1 (en) | 2018-03-29 | 2019-03-12 | Optical lens and camera module and assembling method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274229.2A CN110320625A (en) | 2018-03-29 | 2018-03-29 | Optical lens, camera module and its assemble method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110320625A true CN110320625A (en) | 2019-10-11 |
Family
ID=68111133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810274229.2A Pending CN110320625A (en) | 2018-03-29 | 2018-03-29 | Optical lens, camera module and its assemble method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110320625A (en) |
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| CN112751992A (en) * | 2019-10-29 | 2021-05-04 | 宁波舜宇光电信息有限公司 | Camera module and lens thereof |
| CN112751989A (en) * | 2019-10-29 | 2021-05-04 | 宁波舜宇光电信息有限公司 | Camera module, lens with mark and manufacturing method thereof |
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