CN209400783U - Sampling image lens, identification mould group and electronic device - Google Patents
Sampling image lens, identification mould group and electronic device Download PDFInfo
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- CN209400783U CN209400783U CN201920330667.6U CN201920330667U CN209400783U CN 209400783 U CN209400783 U CN 209400783U CN 201920330667 U CN201920330667 U CN 201920330667U CN 209400783 U CN209400783 U CN 209400783U
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Abstract
The utility model relates to a kind of sampling image lens, successively include: the first lens with negative refracting power by object side to image side；The second lens with positive refracting power；The third lens with positive refracting power；Sampling image lens meet relational expression: 2.50mm < SD11/sin (ANG12) < 5.20mm；Wherein, SD11 is the height at the object side maximum effective diameter of the first lens relative to optical axis, and ANG12 is the angle of the vertical line of tangent line and optical axis of the image side surface curved surface of the first lens at maximum effective diameter.When meeting above-mentioned relation, effective semiaperture of the object side of the first lens can be controlled rationally effectively to expand the field angle of sampling image lens, simultaneously, it also can control the angle of the image side surface of the first lens curved surface tangent line at maximum effective diameter and point of contact vertical line, it is bent the face type of the image side surface of the first lens and is unlikely to excessive, to improve the molding yield of the first lens, manufacture difficulty and cost are reduced.
Description
Technical field
The utility model relates to optical imaging fields, more particularly to a kind of sampling image lens, identification mould group and electronic device.
Background technique
With the rapid development of TOF (Time of Flight, flight time) technology and the photosensitive member of support TOF technology
The volume production of part, support TOF technology application field will be very extensive, such as apply the face on mobile phone to unlock, automobile it is automatic
Driving, man-machine interface, game, industrial machine vision, measurement etc..
Include the emitting structural that can emit modulation light being mutually matched in TOF technology and can receive modulation light
Receive structure.And general reception structure there are problems that leading to not obtain complete measured object information since visual angle is small.
Utility model content
Based on this, it is necessary to aiming at the problem that how to increase the angle of view, provide a kind of sampling image lens, identification mould group and
Electronic device.
A kind of sampling image lens successively include: by object side to image side
The first lens with negative refracting power；
The second lens with positive refracting power；
The third lens with positive refracting power；
The sampling image lens meet relational expression:
2.50mm < SD11/sin (ANG12) < 5.20mm；
Wherein, SD11 is the height at the object side maximum effective diameter of first lens relative to optical axis, and ANG12 is
The angle of the vertical line of tangent line and optical axis of the image side surface curved surface of first lens at maximum effective diameter.Meet above-mentioned relation
When, effective semiaperture of the object side of first lens can be rationally controlled (relative to the height of optical axis at maximum effective diameter
Degree), effectively to expand the field angle of the sampling image lens, simultaneously, moreover it is possible to which the image side surface for controlling first lens has in maximum
The angle for imitating the curved surface tangent line and point of contact vertical line at diameter is bent the face type of the image side surface of first lens and was unlikely to
Greatly, to improve the molding yield of first lens, manufacture difficulty and cost are reduced.
The sampling image lens meet relational expression in one of the embodiments:
1.10 < FNO < 1.80；
Wherein, FNO is the F-number of the sampling image lens.
When meeting above-mentioned relation, be capable of increasing the light passing amount of the sampling image lens, under darker environment or light not
Also the sampling image lens can be made to obtain measured object clearly detailed information in the case where foot, to promote image quality.
The sampling image lens meet relational expression in one of the embodiments:
2.00 < TTL/ | f1 | < 5.00；
Wherein, TTL be first lens object side to the sampling image lens imaging surface in the distance on optical axis, f1
For the focal length of first lens.First lens provide the negative refracting power of the sampling image lens whole, when meeting above-mentioned pass
When being, the degree of divergence of the light into after first lens can be enhanced, to be conducive to increase the view of the sampling image lens
Rink corner.As TTL/ | f1 | when≤2.00, the optical length of the sampling image lens is too short, will cause the susceptibility of the sampling image lens
It increases, so that lens error correction is difficult.As TTL/ | f1 | when >=5.00, the optical length of the sampling image lens is too long, causes light
Chief ray angle into imaging surface is too small, and causes imaging surface relative luminance insufficient, to be easy to appear dark angle.
The sampling image lens meet relational expression in one of the embodiments:
2.50 < (f2+f3)/CT2 < 9.00；
Wherein, f2 is the focal length of second lens, and f3 is the focal length of the third lens, and CT2 is second lens
In the thickness on optical axis.When meeting above-mentioned relation, by second lens and the positive refracting power of the third lens reasonable disposition with
The negative spherical aberration that first lens generate is balanced, reduces the tolerance sensitivities of the sampling image lens, and improve image quality.When
(f2+f3) when/CT2≤2.50, second lens are blocked up in the thickness on optical axis, so that the length of the sampling image lens is spent
It is long.As (f2+f3)/CT2 >=9.00, the manufacture difficulty excessively thin in the thickness on optical axis of second lens.
The sampling image lens meet relational expression in one of the embodiments:
1.05 < f23/f < 2.40；
Wherein, f23 is the combined focal length of second lens and the third lens, and f is always having for the sampling image lens
Imitate focal length.When meeting above-mentioned relation, can the second lens and the refracting power of the third lens described in reasonable distribution to effectively correct
The aberration of the sampling image lens.And as f23/f≤1.05, the positive refracting power of second lens and the third lens offer
It is insufficient, it is difficult to correct the aberration of the sampling image lens.As f23/f >=2.40, second lens and the third lens are mentioned
The positive refracting power supplied is unbalanced, increases the tolerance sensitivities of the sampling image lens, causes image quality bad.
The sampling image lens meet relational expression in one of the embodiments:
- 0.90 < R2/f1 < -0.50；
Wherein, R2 is radius of curvature of the image side surface of first lens at optical axis, and f1 is the coke of first lens
Away from.When meeting above-mentioned relation, the image side surface of first lens has suitable radius of curvature at optical axis, is conducive to correct picture
Difference.And as R2/f1≤- 0.90, radius of curvature of the image side surface of first lens at optical axis is excessive, so that face type is bent
Become larger, molding yield is low, and eyeglass manufacture is difficult.As R2/f1 >=-0.50, the image side surface of first lens is at optical axis
The focal length of radius of curvature and first lens can not be reasonably combined, insufficient so as to cause negative refracting power, and makes the capture
The aberration of camera lens is excessive, and amendment is difficult.
The sampling image lens meet relational expression in one of the embodiments:
- 13.50 < (R6+R7)/(R6-R7) < 0.50；
Wherein, R6 is radius of curvature of the object side of the third lens at optical axis, and R7 is the picture of the third lens
Radius of curvature of the side at optical axis.When meeting above-mentioned relation, radius of curvature of the object side of the third lens at optical axis
It can suitably be configured with the radius of curvature of the image side surfaces of the third lens at optical axis, so that it is saturating to increase the third
The machinability of the shape of mirror, meanwhile, it can also be effectively improved the astigmatism and Aberration Problem of the sampling image lens.
The sampling image lens meet relational expression in one of the embodiments:
BFL≥1.70mm；
Wherein, BFL be the third lens image side surface to the sampling image lens imaging surface in the distance on optical axis.It is full
When sufficient above-mentioned relation, it is ensured that the sampling image lens have enough focusing spaces in the installation process of mould group, thus Lifting Modules
The assembling yield of group, simultaneously, moreover it is possible to so that the depth of focus of the sampling image lens is broadened to obtain the more depth informations of object space.
A kind of identification mould group, comprising:
Emitting structural, to emit modulation light；
Structure is received, including sampling image lens described in photosensitive element and any of the above-described embodiment, the photosensitive element is set
It is placed on the imaging surface of the sampling image lens.
A kind of electronic device, including sampling image lens described in any of the above-described embodiment or identification mould group.
Detailed description of the invention
Fig. 1 is the sampling image lens schematic diagram figure that the utility model first embodiment provides；
Fig. 2 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in first embodiment；
Fig. 3 is the schematic diagram for the sampling image lens that the utility model second embodiment provides；
Fig. 4 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in second embodiment；
Fig. 5 is the schematic diagram for the sampling image lens that the utility model 3rd embodiment provides；
Fig. 6 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in 3rd embodiment；
Fig. 7 is the schematic diagram for the sampling image lens that the utility model fourth embodiment provides；
Fig. 8 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in fourth embodiment；
Fig. 9 is the schematic diagram for the sampling image lens that the 5th embodiment of the utility model provides；
Figure 10 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in the 5th embodiment；
Figure 11 is the schematic diagram for the sampling image lens that the utility model sixth embodiment provides；
Figure 12 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in sixth embodiment；
Figure 13 is the schematic diagram for the sampling image lens that the 7th embodiment of the utility model provides；
Figure 14 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in the 7th embodiment；
Figure 15 is the schematic diagram for the sampling image lens that the 8th embodiment of the utility model provides；
Figure 16 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in the 8th embodiment；
Figure 17 is the schematic diagram for the sampling image lens that the 9th embodiment of the utility model provides；
Figure 18 is ball chromaticity difference diagram (mm), astigmatism figure (mm) and the distortion figure (%) of sampling image lens in the 9th embodiment；
Figure 19 is the schematic diagram for the identification mould group that an embodiment of the present invention provides；
Figure 20 is the schematic diagram for the electronic device that an embodiment of the present invention provides.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes the disclosure of the utility model
Content is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another original part
Or there may also be elements placed in the middle.When an element is considered as " connection " another original part, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another original part "upper",
There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are
For illustrative purposes.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Term used in the description is intended merely to describe specifically to implement herein
The purpose of example, it is not intended that in limitation the utility model.Term " and or " used herein includes one or more relevant
Any and all combinations of listed item.
Refering to what is shown in Fig. 1, the sampling image lens 10 in the application implementation successively include having negative refracting power by object side to image side
The first lens L1, the second lens L2 with positive refracting power, the third lens L3 with positive refracting power.
The light for carrying measured object information enters the first lens L1 from the object side of sampling image lens 10, then successively passes through second
Lens L2 and the third lens L3, and reach on the imaging surfaces of sampling image lens 10.
First lens L1 includes object side S1 and image side surface S2, the second lens L2 include object side S3 and image side surface S4, and
Three lens L3 include object side S5 and image side surface S6.In addition, the imaging surface S10 of sampling image lens 10 is located at the picture of the third lens L3
Side.
The aspherical face type formula of first lens L1, the second lens L2, the third lens L3 are as follows:
Wherein, Z is at a distance from aspherical upper respective point to the plane tangent with surface vertices, and r is aspherical upper respective point
To the distance of optical axis, c is the curvature on aspherical vertex, and k is the constant of the cone, Ai be in aspherical face type formula with i-th high order
The corresponding coefficient of item.
In some embodiments, sampling image lens 10 are additionally provided with diaphragm ST0.Preferably, diaphragm ST0 may be disposed at first thoroughly
Between mirror L1 and the second lens L2, or it is set between the second lens L2 and the third lens L3.
In some embodiments, sampling image lens 10 can be used for bio-identification, machine vision, measurement etc. and be related to TOF (Time
Of Flight, flight time) technology identification equipment in, therefore in these embodiments, filter is additionally provided in sampling image lens 10
Mating plate 110 is to obtain the probing light of respective wavelength and filter interference light.Optical filter 110 includes object side S7 and image side surface S8.
Preferably, optical filter 110 is set between the third lens L3 and imaging surface S10.In wherein some embodiments, optical filter 110
It can be infrared band pass filter or ultraviolet band pass filter.In further embodiments, when sampling image lens 10 work in Crape ring
Under border and when work light is visible light source, optical filter 110 or visible band pass filter.Bandpass filter can be permitted
Perhaps the light of a certain wave band penetrates, to filter the interference light of other wavelength, improves identification quality.
In some embodiments, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics, at this point,
The lens of plastic material can reduce the weight of sampling image lens 10 and reduce manufacturing cost.In some embodiments, the first lens
The material of L1, the second lens L2 and the third lens L3 are glass, at this point, sampling image lens 10 are resistant to higher temperature and tool
There is preferable optical property.It in further embodiments, can also be only the first lens L1 be glass material, and other lenses are
Plastic material, at this point, can preferably be resistant to the ambient temperature effect of object side near the first lens L1 of object side, and due to it
His lens are the relationship of plastic material, to can also reduce by 10 production cost of sampling image lens.
In some embodiments, sampling image lens 10 meet relational expression:
2.50mm < SD11/sin (ANG12) < 5.20mm；
Wherein, SD11 is the height at the object side S1 maximum effective diameter of the first lens L1 relative to optical axis, and ANG12 is
The vertical line of tangent line and optical axis of the image side surface S2 curved surface at maximum effective diameter of the first lens L1 angle, with specific reference to figure
1, if the maximum effective diameter position for the image side surface S2 that the A point in Fig. 1 is the first lens L1, the angle θ represent above-mentioned
ANG12.In some embodiments wherein, SD11/sin (ANG12) be specifically as follows 2.80mm, 3.00mm, 3.50mm,
4.00mm, 4.50mm or 4.90mm.When meeting above-mentioned relation, effective half bore of the object side S1 of the first lens L1 can be rationally controlled
Diameter (relative to the height of optical axis at maximum effective diameter), effectively to expand the field angle of sampling image lens 10, simultaneously, moreover it is possible to control
The angle of the image side surface S2 of first lens L1 the curved surface tangent line at maximum effective diameter and point of contact vertical line, makes the first lens L1's
The face type bending of image side surface S2 is unlikely to excessive, to improve the molding yield of the first lens L1, reduces manufacture difficulty and cost.
In some embodiments, sampling image lens 10 meet relational expression:
1.10 < FNO < 1.80；
Wherein, FNO is the F-number of sampling image lens 10.In some embodiments wherein, FNO is specifically as follows 1.30,
1.40,1.50,1.60 or 1.70.When meeting above-mentioned relation, it is capable of increasing the light passing amount of sampling image lens 10, is taken when measured object is separate
When as camera lens 10, sampling image lens 10 can still obtain the more light reflected by measured object, to promote image quality.
In some embodiments, sampling image lens 10 meet relational expression:
2.00 < TTL/ | f1 | < 5.00；
Wherein, the object side S1 that TTL is the first lens L1 to sampling image lens 10 imaging surface S10 in the distance on optical axis,
F1 is the focal length of the first lens L1.In some embodiments wherein, TTL/ | f1 | be specifically as follows 2.60,2.90,3.50,
3.90,4.20 or 4.60.First lens L1 provides the whole negative refracting power of sampling image lens 10 can increase when meeting above-mentioned relation
The strong degree of divergence into the light after the first lens L1, to be conducive to increase the field angle of sampling image lens 10.Work as TTL/ | f1
| when≤2.00, the optical length of sampling image lens 10 is too short, and the susceptibility that will cause sampling image lens 10 increases, so that lens error correction
It is difficult.As TTL/ | f1 | when >=5.00, the optical length of sampling image lens 10 is too long, and light is caused to enter the key light of imaging surface S10
Line angle too small, and cause imaging surface S10 relative luminance insufficient, to be easy to appear dark angle.
In some embodiments, sampling image lens 10 meet relational expression:
2.50 < (f2+f3)/CT2 < 9.00；
Wherein, f2 is the focal length of the second lens L2, and f3 is the focal length of the third lens L3, and CT2 is the second lens L2 in optical axis
On thickness.In some embodiments wherein, (f2+f3)/CT2 is specifically as follows 2.80,3.50,4.20,4.90,6.30,
7.50 or 8.50.When meeting above-mentioned relation, by the second lens L2 and the positive refracting power of the third lens L3 reasonable disposition to balance first
The negative spherical aberration that lens L1 is generated, reduces the tolerance sensitivities of sampling image lens 10, and improves image quality.When (f2+f3)/CT2≤
When 2.50, the second lens L2 is blocked up in the thickness on optical axis, so that the length of sampling image lens 10 is too long.When (f2+f3)/CT2 >=
When 9.00, the second lens L2's is excessively thin in the thickness on optical axis, and manufacture is difficult.
In some embodiments, sampling image lens 10 meet relational expression:
1.05 < f23/f < 2.40；
Wherein, f23 is the combined focal length of the second lens L2 and the third lens L3, and f is total effective focal length of sampling image lens 10.
In some embodiments wherein, f23/f is specifically as follows 1.20,1.50,1.70,1.90,2.10 or 2.30.Meet above-mentioned pass
When being, can reasonable distribution the second lens L2 and the third lens L3 refracting power to effectively correct the aberrations of sampling image lens 10.And work as
When f23/f≤1.05, the positive refracting power that the second lens L2 and the third lens L3 are provided is insufficient, it is difficult to correct the picture of sampling image lens 10
Difference.As f23/f >=2.40, the positive refracting power that the second lens L2 and the third lens L3 are provided is unbalanced, increases sampling image lens 10
Tolerance sensitivities, cause image quality bad.
In some embodiments, sampling image lens 10 meet relational expression:
- 0.90 < R2/f1 < -0.50；
Wherein, R2 is radius of curvature of the image side surface S2 of the first lens L1 at optical axis, and f1 is the focal length of the first lens L1.
In some embodiments wherein, R2/f1 is specifically as follows -0.80, -0.75, -0.70, -0.65, -0.60 or -0.55.Meet
When above-mentioned relation, the image side surface S2 of the first lens L1 has suitable radius of curvature at optical axis, is conducive to correct aberration.And work as
When R2/f1≤- 0.90, radius of curvature of the image side surface S2 of the first lens L1 at optical axis is excessive, so that type bending in face becomes larger, at
Type yield is low, and eyeglass manufacture is difficult.As R2/f1 >=-0.50, radius of curvature of the image side surface S2 of the first lens L1 at optical axis
Focal length with the first lens L1 can not be reasonably combined, insufficient so as to cause negative refracting power, and makes the aberration mistake of sampling image lens 10
Greatly, amendment is difficult.
In some embodiments, sampling image lens 10 meet relational expression:
- 13.50 < (R6+R7)/(R6-R7) < 0.50；
Wherein, R6 is radius of curvature of the object side S5 of the third lens L3 at optical axis, and R7 is the image side of the third lens L3
Radius of curvature of the face S6 at optical axis.In some embodiments wherein, (R6+R7)/(R6-R7) be specifically as follows -11.50, -
10.40, -6.00, -3.00, -0.50,0.30 or 0.40.When meeting above-mentioned relation, the object side S5 of the third lens L3 is in optical axis
The radius of curvature of the radius of curvature at place and the image side surface S6 of the third lens L3 at optical axis can be configured suitably, to increase
Add the machinability of the shape of the third lens L3, meanwhile, it can also be effectively improved the astigmatism and Aberration Problem of sampling image lens 10.
In some embodiments, sampling image lens 10 meet relational expression:
BFL≥1.70mm；
Wherein, BFL be the third lens L3 image side surface S6 to sampling image lens 10 imaging surface S10 in the distance on optical axis.
In some embodiments wherein, BFL be specifically as follows 1.75,1.80,1.85,1.90,1.95,2.00,2.05,2.10 or
2.15.When meeting above-mentioned relation, it is ensured that sampling image lens 10 have enough focusing spaces in the installation process of mould group, to mention
The assembling yield of rising mould group, simultaneously, moreover it is possible to so that the depth of focus of sampling image lens 10 is broadened to obtain the more depth informations of object space.
First embodiment
In first embodiment as shown in Figure 1, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, the second lens L2 with positive refracting power, diaphragm ST0, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Fig. 2 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in first embodiment, astigmatism figure (mm) and distortion
Scheme (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength (being shown in Table the annotation in 1).
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is convex surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is concave surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
Specifically, sampling image lens 10 meet relational expression:
SD11/sin (ANG12)=5.00mm；
Wherein, SD11 is the height at the object side S1 maximum effective diameter of the first lens L1 relative to optical axis, and ANG12 is
The vertical line of tangent line and optical axis of the image side surface S2 curved surface at maximum effective diameter of the first lens L1 angle.Meet above-mentioned pass
When being, effective semiaperture of object side S1 of the first lens L1 can be rationally controlled (relative to the height of optical axis at maximum effective diameter
Degree), effectively to expand the field angle of sampling image lens 10, simultaneously, moreover it is possible to control the image side surface S2 of the first lens L1 in maximum effective
The angle of curved surface tangent line and point of contact vertical line at diameter is bent the face type of the image side surface S2 of the first lens L1 and is unlikely to excessive,
To improve the molding yield of the first lens L1, manufacture difficulty and cost are reduced.
Sampling image lens 10 meet relational expression:
FNO=1.25；
Wherein, FNO is the F-number of sampling image lens 10.When meeting above-mentioned relation, it is capable of increasing the light passing of sampling image lens 10
Amount, when measured object is far from sampling image lens 10, sampling image lens 10 can still obtain the more light reflected by measured object, from
And increase recognition capability.
Sampling image lens 10 meet relational expression:
TTL/ | f1 |=4.86；
Wherein, the object side S1 that TTL is the first lens L1 to sampling image lens 10 imaging surface S10 in the distance on optical axis,
F1 is the focal length of the first lens L1.First lens L1 provides sampling image lens 10 whole negative refracting powers, when meeting above-mentioned relation,
The degree of divergence into the light after the first lens L1 can be enhanced, to be conducive to increase the field angle of sampling image lens 10.
Sampling image lens 10 meet relational expression:
(f2+f3)/CT2=2.54；
Wherein, f2 is the focal length of the second lens L2, and f3 is the focal length of the third lens L3, and CT2 is the second lens L2 in optical axis
On thickness.When meeting above-mentioned relation, by the second lens L2 and the positive refracting power of the third lens L3 reasonable disposition to balance first thoroughly
The negative spherical aberration that mirror L1 is generated, reduces the tolerance sensitivities of sampling image lens 10, and improves image quality.
Sampling image lens 10 meet relational expression:
F23/f=2.35；
Wherein, f23 is the combined focal length of the second lens L2 and the third lens L3, and f is total effective focal length of sampling image lens 10.
When meeting above-mentioned relation, can reasonable distribution the second lens L2 and the third lens L3 refracting power to effectively correct sampling image lens 10
Aberration.
Sampling image lens 10 meet relational expression:
R2/f1=-0.55；
Wherein, R2 is radius of curvature of the image side surface S2 of the first lens L1 at optical axis, and f1 is the focal length of the first lens L1.
When meeting above-mentioned relation, the image side surface S2 of the first lens L1 has suitable radius of curvature at optical axis, is conducive to correct aberration.
Sampling image lens 10 meet relational expression:
(R6+R7)/(R6-R7)=0.33；
Wherein, R6 is radius of curvature of the object side S5 of the third lens L3 at optical axis, and R7 is the image side of the third lens L3
Radius of curvature of the face S6 at optical axis.When meeting above-mentioned relation, radius of curvature of the object side S5 of the third lens L3 at optical axis
It can suitably be configured with the radius of curvature of the image side surface S6 of the third lens L3 at optical axis, to increase the third lens L3
Shape machinability, meanwhile, can also be effectively improved the astigmatism and Aberration Problem of sampling image lens 10.
Sampling image lens 10 meet relational expression:
BFL=1.73mm；
Wherein, BFL be the third lens L3 image side surface S6 to sampling image lens 10 imaging surface S10 in the distance on optical axis.
When meeting above-mentioned relation, it is ensured that sampling image lens 10 have enough focusing spaces in the installation process of mould group, thus Lifting Modules
The assembling yield of group, simultaneously, moreover it is possible to so that the depth of focus of sampling image lens 10 is broadened to obtain the more depth informations of object space.
In the first embodiment, total effective focal length f=0.91mm, the F-number FNO=1.25 of sampling image lens 10, maximum view
Rink corner FOV=132.6 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
8.52mm。
In addition, each parameter of sampling image lens 10 is provided by Tables 1 and 2.By each element of object side to image side successively according to table 1
The sequence of each element from top to bottom arranges.In same lens, serial number lesser surface in face is the object side of the lens, face sequence
Number biggish surface is the image side surface of the lens, if face serial number 1 and 2 is respectively the object side S1 and image side surface of the first lens L1
S2.Y radius in table 1 is the radius of curvature of the object side or image side surface of respective face serial number at optical axis.First lens L1's is " thick
First numerical value in degree " parameter column is the lens in the thickness on optical axis, and second numerical value is the image side surface of the lens to rear
The object side of one lens is in the distance on optical axis.Numerical value of the diaphragm ST0 in " thickness " parameter column is diaphragm ST0 to latter lens
Object side peak (vertex refers to intersection point of the lens with optical axis) at a distance from optical axis, we default the first lens object side to most
The direction of latter piece of eyeglass image side surface is that the positive direction of optical axis shows that diaphragm ST0 is set to latter lens when the value is negative
The right side of object side peak, if diaphragm STO is with a thickness of positive value, diaphragm is in the left side of the first lens object side peak.Optical filter
Numerical value corresponding to the 110 face serial number 9 in " thickness " parameter is the image side surface S8 to imaging surface S10 of optical filter 110 in optical axis
On distance.Table 2 is the relevant parameter table of the non-spherical surface of each lens in table 1, and wherein K is the constant of the cone, and Ai is aspherical
Coefficient corresponding with i-th high-order term in the type formula of face.
In addition, the refractive index and Abbe number of each lens are the numerical value under reference wavelength in following embodiment.
Table 1
Table 2
Second embodiment
In second embodiment as shown in Figure 3, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, the second lens L2 with positive refracting power, diaphragm ST0, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Fig. 4 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in second embodiment, astigmatism figure (mm) and distortion
Scheme (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is concave surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is concave surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In a second embodiment, total effective focal length f=0.91mm, the F-number FNO=1.25 of sampling image lens 10, maximum view
Rink corner FOV=132.6 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
8.00mm。
In addition, each parameter of sampling image lens 10 is provided by table 3 and table 4, and the wherein definition and first embodiment of each parameter
In it is identical, will not be repeated here herein.
Table 3
Table 4
It can be derived from following data according to above-mentioned provided each parameter information:
3rd embodiment
In 3rd embodiment as shown in Figure 5, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, the second lens L2 with positive refracting power, diaphragm ST0, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Fig. 6 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in 3rd embodiment, astigmatism figure (mm) and distortion
Scheme (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is concave surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is concave surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is concave surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the third embodiment, total effective focal length f=0.91mm, the F-number FNO=1.25 of sampling image lens 10, maximum view
Rink corner FOV=132.7 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.85mm。
In addition, each parameter of sampling image lens 10 is provided by table 5 and table 6, and the wherein definition and first embodiment of each parameter
In it is identical, will not be repeated here herein.
Table 5
Table 6
It can be derived from following data according to above-mentioned provided each parameter information:
Fourth embodiment
In fourth embodiment as shown in Figure 7, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, the second lens L2 with positive refracting power, diaphragm ST0, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Fig. 8 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in fourth embodiment, astigmatism figure (mm) and distortion
Scheme (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is concave surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is convex surface at circumference, and the image side surface S4 of the second lens L2 is concave surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is convex surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the fourth embodiment, total effective focal length f=1.24mm, the F-number FNO=1.29 of sampling image lens 10, maximum view
Rink corner FOV=127.5 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.32mm。
In addition, each parameter of sampling image lens 10 is provided by table 7 and table 8, and the wherein definition and first embodiment of each parameter
In it is identical, will not be repeated here herein.
Table 7
Table 8
It can be derived from following data according to above-mentioned provided each parameter information:
5th embodiment
In the 5th embodiment as shown in Figure 9, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, the second lens L2 with positive refracting power, diaphragm ST0, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Figure 10 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in the 5th embodiment, astigmatism figure (mm) and abnormal
Become figure (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is concave surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is convex surface at circumference, and the image side surface S4 of the second lens L2 is concave surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is convex surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the 5th embodiment, total effective focal length f=0.93mm, the F-number FNO=1.29 of sampling image lens 10, maximum view
Rink corner FOV=148.5 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.32mm。
In addition, each parameter of sampling image lens 10 is provided by table 9 and table 10, and the wherein definition and first embodiment of each parameter
In it is identical, will not be repeated here herein.
Table 9
Table 10
It can be derived from following data according to above-mentioned provided each parameter information:
Sixth embodiment
In sixth embodiment as shown in figure 11, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, diaphragm ST0, the second lens L2 with positive refracting power, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Figure 12 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in sixth embodiment, astigmatism figure (mm) and abnormal
Become figure (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is convex surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is concave surface at optical axis；The object side of the third lens L3
S5 is concave surface at circumference, and the image side surface S6 of the third lens L3 is convex surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the sixth embodiment, total effective focal length f=1.50mm, the F-number FNO=1.70 of sampling image lens 10, maximum view
Rink corner FOV=121.5 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.28mm。
In addition, each parameter of sampling image lens 10 is provided by table 11 and table 12, and wherein the definition of each parameter is implemented with first
It is identical in example, it will not be repeated here herein.
Table 11
Table 12
It can be derived from following data according to above-mentioned provided each parameter information:
7th embodiment
As shown in fig. 13 that in the 7th embodiment, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, diaphragm ST0, the second lens L2 with positive refracting power, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Figure 14 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in the 7th embodiment, astigmatism figure (mm) and abnormal
Become figure (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is concave surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is concave surface at optical axis；The object side of the third lens L3
S5 is concave surface at circumference, and the image side surface S6 of the third lens L3 is convex surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the seventh embodiment, total effective focal length f=1.36mm, the F-number FNO=1.50 of sampling image lens 10, maximum view
Rink corner FOV=119 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.34mm。
In addition, each parameter of sampling image lens 10 is provided by table 13 and table 14, and wherein the definition of each parameter is implemented with first
It is identical in example, it will not be repeated here herein.
Table 13
Table 14
It can be derived from following data according to above-mentioned provided each parameter information:
8th embodiment
In the 8th embodiment as shown in figure 15, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, diaphragm ST0, the second lens L2 with positive refracting power, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Figure 16 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in the 8th embodiment, astigmatism figure (mm) and abnormal
Become figure (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is concave surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is concave surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is convex surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is convex surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the eighth embodiment, total effective focal length f=1.26mm, the F-number FNO=1.40 of sampling image lens 10, maximum view
Rink corner FOV=124 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
6.85mm。
In addition, each parameter of sampling image lens 10 is provided by table 15 and table 16, and wherein the definition of each parameter is implemented with first
It is identical in example, it will not be repeated here herein.
Table 15
Table 16
It can be derived from following data according to above-mentioned provided each parameter information:
9th embodiment
In the 9th embodiment as shown in figure 17, sampling image lens 10 successively include having negative refracting power by object side to image side
First lens L1, diaphragm ST0, the second lens L2 with positive refracting power, the third lens L3 with positive refracting power and infrared
Bandpass filter 110.In addition, Figure 18 is the ball chromaticity difference diagram (mm) of sampling image lens 10 in the 9th embodiment, astigmatism figure (mm) and abnormal
Become figure (%), astigmatism figure and distortion figure therein are the datagram under reference wavelength.
Wherein, the object side S1 of the first lens L1 is concave surface at optical axis, and the image side surface S2 of the first lens L1 is at optical axis
For concave surface；The object side S1 of first lens L1 is convex surface at circumference, and the image side surface S2 of the first lens L1 is concave surface at circumference.
The object side S3 of second lens L2 is convex surface at optical axis, and the image side surface S4 of the second lens L2 is convex surface at optical axis；Second thoroughly
The object side S3 of mirror L2 is convex surface at circumference, and the image side surface S4 of the second lens L2 is convex surface at circumference.The third lens L3's
Object side S5 is convex surface at optical axis, and the image side surface S6 of the third lens L3 is concave surface at optical axis；The object side of the third lens L3
S5 is convex surface at circumference, and the image side surface S6 of the third lens L3 is concave surface at circumference.
First lens L1, the object side of the second lens L2 and the third lens L3 and image side surface are aspherical.
In addition, the material of the first lens L1, the second lens L2 and the third lens L3 are plastics.
In the 9th embodiment, total effective focal length f=1.68mm, the F-number FNO=1.76 of sampling image lens 10, maximum view
Rink corner FOV=110 degree (deg.), the object side S1 to imaging surface S10 of the first lens L1 is in the distance TTL=on optical axis
7.32mm。
In addition, each parameter of sampling image lens 10 is provided by table 17 and table 18, and wherein the definition of each parameter is implemented with first
It is identical in example, it will not be repeated here herein.
Table 17
Table 18
It can be derived from following data according to above-mentioned provided each parameter information:
With reference to shown in Figure 19, in some embodiments, sampling image lens 10 by with 210 Matching installation of photosensitive element to form
Receive structure 20.In addition, photosensitive element 210 is gone back and circuit board electrical connection.Preferably, photosensitive element 210 is set to sampling image lens
On 10 imaging surface S10.At this point, being equipped with the reception structures 20 of sampling image lens 10 for the characteristic with big wide-angle.In some realities
It applies in example, sensitive chip 210 can be CCD (Charge Coupled Device, charge-coupled device) or CMOS
(Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor).Incident light is felt
Optical element 210 is converted into electric signal after receiving, and is sent in image processor and is analyzed by circuit board.
In wherein some embodiments, photosensitive element 210 is relatively fixed at a distance from sampling image lens 10 (such as by photosensitive element
210 are arranged on the imaging surface S10 of sampling image lens 10), identification mould group 20 at this time is fixed-focus mould group.In other realities wherein
It applies in example, by setting voice coil motor so that photosensitive element 210 can be mobile relative to sampling image lens 10, and then makes to identify mould group 20
With focus function.Specifically, voice coil motor can control sampling image lens 10 whole mobile relative to photosensitive element 210, or control sense
Optical element 210 is mobile to realize focusing relative to sampling image lens 10.
In addition, in some embodiments, can also will receive structure 20 and be matched with an emitting structural to form identification mould group,
In emitting structural can emit the light of specific band (such as infrared light) and modulation intelligence to measured object, and it is logical to receive structure 20
It crosses and configures corresponding optical filter 110 to receive by the reflected modulation light of measured object.
In some embodiments, identification mould group can be applied to bio-identification (fingerprint recognition, personal recognition, face recognition),
On the products such as machine vision, man-machine interface, automatic Pilot.Specifically, identification mould group can be used as TOF (Time of Flight, fly
The row time) a part in technical equipment, it is identified with the 3D profile to measured object.
With reference to shown in Figure 20, in some embodiments, above-mentioned identification mould group be can be applied in electronic device 30, electronic device
30 can be smart phone, camera mobile phone, digital still camera, game machine, tablet computer, PC, fingerprint clocking-in machine or the work of miniaturization
To be attached in the household appliances of camera-enabled.
In further embodiments, sampling image lens 10 are also directly applicable in above-mentioned various types of electronic device, to obtain
Take extraneous visible scene.
Specifically, electronic device 30 can be for using the equipment of TOF identification technology.At this point, electronic device 30 is provided with hair
Structure 310 is penetrated to emit modulated light, meanwhile, sampling image lens 10 are as a part for receiving structure in electronic device 30.
At this point, the light with specific band (such as infrared light) and modulation intelligence that emitting structural 310 is issued can be received by receiving structure
Line.In some embodiments, when electronic device 30 is portable mobile apparatus, sampling image lens 10 can be with photosensitive element and transmitting
Structure collectively constitutes the preposition identification mould group or postposition identification mould group of electronic device 30.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of sampling image lens, which is characterized in that successively include: by object side to image side
The first lens with negative refracting power；
The second lens with positive refracting power；
The third lens with positive refracting power；
The sampling image lens meet relational expression:
2.50mm < SD11/sin (ANG12) < 5.20mm；
Wherein, SD11 is the height at the object side maximum effective diameter of first lens relative to optical axis, and ANG12 is described
The angle of the vertical line of tangent line and optical axis of the image side surface curved surface of first lens at maximum effective diameter.
2. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
1.10 < FNO < 1.80；
Wherein, FNO is the F-number of the sampling image lens.
3. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
2.00 < TTL/ | f1 | < 5.00；
Wherein, TTL be first lens object side to the sampling image lens imaging surface in the distance on optical axis, f1 is institute
State the focal length of the first lens.
4. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
2.50 < (f2+f3)/CT2 < 9.00；
Wherein, f2 is the focal length of second lens, and f3 is the focal length of the third lens, and CT2 is second lens in light
Thickness on axis.
5. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
1.05 < f23/f < 2.40；
Wherein, f23 is the combined focal length of second lens and the third lens, and f is total effective coke of the sampling image lens
Away from.
6. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
- 0.90 < R2/f1 < -0.50；
Wherein, R2 is radius of curvature of the image side surface of first lens at optical axis, and f1 is the focal length of first lens.
7. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
- 13.50 < (R6+R7)/(R6-R7) < 0.50；
Wherein, R6 is radius of curvature of the object side of the third lens at optical axis, and R7 is the image side surface of the third lens
Radius of curvature at optical axis.
8. sampling image lens according to claim 1, which is characterized in that the sampling image lens meet relational expression:
BFL≥1.70mm；
Wherein, BFL be the third lens image side surface to the sampling image lens imaging surface in the distance on optical axis.
9. a kind of identification mould group characterized by comprising
Emitting structural, to emit modulation light；
Structure is received, including photosensitive element and the described in any item sampling image lens of claim 1-8, the photosensitive element are set to
On the imaging surface of the sampling image lens.
10. a kind of electronic device, which is characterized in that including the described in any item sampling image lens of claim 1-8 or claim 9
The identification mould group.
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| US11385440B2 (en) | 2019-04-10 | 2022-07-12 | Largan Precision Co., Ltd. | Optical photographing lens assembly, fingerprint identification module and electronic device |
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| US11385440B2 (en) | 2019-04-10 | 2022-07-12 | Largan Precision Co., Ltd. | Optical photographing lens assembly, fingerprint identification module and electronic device |
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Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi Jingchao optics Co.,Ltd. Address before: 330200 East of College Sixth Road and South of Tianxiang Avenue, Nanchang High-tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee before: OFILM TECH Co.,Ltd. |