CN208172359U - A kind of imaging lens system group - Google Patents
A kind of imaging lens system group Download PDFInfo
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- CN208172359U CN208172359U CN201820717186.6U CN201820717186U CN208172359U CN 208172359 U CN208172359 U CN 208172359U CN 201820717186 U CN201820717186 U CN 201820717186U CN 208172359 U CN208172359 U CN 208172359U
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Abstract
The present invention relates to a kind of imaging lens system group, the imaging lens system group from object side, successively by：The first lens with positive refracting power have negative refractive power, and object side is convex surface, image side surface is the second lens of semilune of concave surface, with negative refractive power, and object side is concave surface, and image side surface is the third lens on convex surface, has positive refracting power, and the paraxial place in object side is convex surface, image side surface is the 4th lens on convex surface and has negative refractive power, and object side is concave surface, and the paraxial place in image side is that the 5th lens of concave surface form.In the present invention, using 5 aspherical glass lens, optics overall length may be implemented less than 3.9mm, f-number is the bright camera lens of F2.0, has good performance for imaging also under darker environment, maximum as circle is φ 5.5mm, when 1/3 " Sensor Pixel Dimensions of matching are 0.9um; pixel is applicable to shield smart phone comprehensively up to the 16,000,000, and first lens P1, structure of the second lens P2 clear aperture less than φ 1.5mm.
Description
Technical field
The present invention relates to lens technology, especially a kind of imaging lens system group.
Background technique
With the development of image sensor chip technology, single pixel size is done smaller and smaller, and this requires take therewith
The pick-up lens parsing power matched is also higher and higher.Smart phone with camera function, recently as the market demand also new hair
Exhibition trend, in addition to high pixel, large aperture, except extra-thin requirement, comprehensive screen of smart phone also lifts on the market recently
Play upsurge.This requires pick-up lens other than meeting described above require, and the size of object side is small as far as possible, with
Meet the requirement of screen structure design aspect comprehensively.
Summary of the invention
The purpose of the invention is to provide a kind of imaging lens system group.
The technical scheme is that：A kind of imaging lens system group, the imaging lens system group from object side, successively by：Tool
There are the first lens of positive refracting power, there is negative refractive power, and object side is convex surface, image side surface is that the semilune second of concave surface is saturating
Mirror has negative refractive power, and object side is concave surface, and image side surface is the third lens on convex surface, has positive refracting power, and object side is paraxial
Place is convex surface, and image side surface is the 4th lens on convex surface and has negative refractive power, and object side is concave surface, and the paraxial place in image side is concave surface
The 5th lens composition, and meet conditional below：
-1<(R7+R8)/(R7-R8)<1.2
0.5<F4/F<6.5
Wherein, wherein R7 is the object side of the 4th lens, and R8 is respectively the image side curvature radius of the 4th lens, and F4 is
4th focal length of lens, F are the 4th lens system focal length.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
0.2<Y1/ImgH<0.35
Wherein, Y1 is the effective clear aperture of image side surface of the second lens, and ImgH is total image height.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
0.53<Y2/ImgH<0.95
Wherein, Y2 is the effective clear aperture of image side surface of the 4th lens, and ImgH is total image height.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
-10.5<F2/F<-1.2
Wherein, F2 is the focal length of the second lens, and F is system focal length.
The beneficial effects of the invention are as follows：The present invention uses 5 aspherical glass lens, and optics overall length may be implemented and be less than
3.9mm, f-number are the bright camera lens of F2.0, have good performance for imaging also under darker environment, maximum as circle is φ
5.5mm, when 1/3 " Sensor Pixel Dimensions of matching are 0.9um, pixel is up to the 16,000,000, and first lens P1, the second lens
Structure of the P2 clear aperture less than φ 1.5mm is applicable to shield smart phone comprehensively.
Detailed description of the invention
Fig. 1 is the optical axis direction sectional view of imaging lens system group of the present invention；
Fig. 2 is the X-Y scheme of the imaging lens system group in the embodiment of the present invention 1；
Fig. 3 is the MTF transfer curve figure of the imaging lens system group in the embodiment of the present invention 1；
Fig. 4 is the astigmatism curvature of field and optical distortion indicatrix of the imaging lens system group in the embodiment of the present invention 1；
Fig. 5 is the defocusing curve of the imaging lens system group in the embodiment of the present invention 1；
Fig. 6 is the X-Y scheme of the imaging lens system group in the embodiment of the present invention 2；
Fig. 7 is the MTF transfer curve figure of the imaging lens system group in the embodiment of the present invention 2；
Fig. 8 is the astigmatism curvature of field and optical distortion indicatrix of the imaging lens system group in the embodiment of the present invention 2；
Fig. 9 is the defocusing curve of the imaging lens system group in the embodiment of the present invention 2；
Figure 10 is the X-Y scheme of the imaging lens system group in the embodiment of the present invention 3；
Figure 11 is the MTF transfer curve figure of the imaging lens system group in the embodiment of the present invention 3；
Figure 12 is the astigmatism curvature of field and optical distortion indicatrix of the imaging lens system group in the embodiment of the present invention 3；
Figure 13 is the defocusing curve of the imaging lens system group in the embodiment of the present invention 3.
In figure：P1. the first lens, the second lens of P2., P3. the third lens, the 4th lens of P4., the 5th lens of P5..
Specific embodiment
In order to more clearly state the present invention, the present invention is further described with reference to the accompanying drawing.
A kind of imaging lens system group, the imaging lens system group from object side, successively by：The first lens with positive refracting power
P1, there is negative refractive power, and object side is convex surface, image side surface is semilune the second lens P2 of concave surface, there is negative refractive power, and
Object side is concave surface, and image side surface is the third lens P3 on convex surface, has positive refracting power, and the paraxial place in object side is convex surface, image side surface
For the 4th lens P4 on convex surface and with negative refractive power, and object side is concave surface, and the paraxial place in image side is the 5th lens P5 of concave surface
Composition.Distribution for the positive negative power of above 5 eyeglasses, makes each aberration obtain good correction, the system lateral chromatic aberration
Correction to less than 2um.
And meet conditional below：
-1<(R7+R8)/(R7-R8)<1.2
0.5<F4/F<6.5
Wherein, R7 is the object side of the 4th lens P4, and R8 is respectively the image side curvature radius of the 4th lens P4, F4 the
Four lens P4 focal lengths, F are the 4th lens P4 system focal length.
-1<(R7+R8)/(R7-R8)<1.2, this conditional is used to limit the shape and focal power of P4 lens, meets this model
It is with and is preferably matched with incidence angle of the chief ray of system in image planes is enable with imaging sensor conducive to anaberration.
0.5<F4/F<6.5, this conditional is used to optimize distribution ratio of the focal power in system focal power of the 4th lens P4.It is full
This condition of foot is conducive to make system compact and anaberration.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
0.2<Y1/ImgH<0.35
Wherein, Y1 is the effective clear aperture of image side surface of the second lens P2, and ImgH is total image height.This conditional is conducive to make
System realizes that object side is more small-bore to meet the needs of comprehensive screen mobile phone structure design.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
0.53<Y2/ImgH<0.95
Wherein, Y2 is the effective clear aperture of image side surface of the 4th lens P4, and ImgH is total image height.This conditional is conducive to make
System realizes that object side is more small-bore to meet the needs of comprehensive screen mobile phone structure design.
A kind of above-mentioned imaging lens system group, the imaging lens system group also meet following relationship：
-10.5<F2/F<-1.2
Wherein, F2 is the focal length of the second lens P2, and F is system focal length.The focal length that this condition is used to constrain the 2nd lens P2 accounts for
The ratio of system focal length will be unfavorable for system compensation aberration more than the upper limit or lower limit, it is difficult to improve the parsing power of system.
5 eyeglasses of this pick-up lens all use even aspheric surface glass lens, and asphericity coefficient meets following equation：
Z=cy2/[1+{1-(1+k)c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14+A16y16
Wherein,
Z：Aspherical rise,
C：Aspherical paraxial curvature,
y：Camera lens aperture,
k：Circular cone coefficient,
A4：4 asphericity coefficients,
A6：6 asphericity coefficients,
A8：8 asphericity coefficients,
A10：10 asphericity coefficients,
A12：12 asphericity coefficients,
A14：14 asphericity coefficients,
A16：16 asphericity coefficients.
The present invention uses 5 aspherical glass lens, optics overall length may be implemented less than 3.9mm, f-number is F2.0's
Bright camera lens, has good performance for imaging also under darker environment, and maximum picture circle is φ 5.5mm, matches 1/3 " Sensor
When Pixel Dimensions are 0.9um, pixel is up to 16,000,000.And the first lens P1, the second lens P2 clear aperture are less than φ 1.5mm
Structure be applicable to shield smart phone comprehensively.
Embodiment 1
Field angle is 80 °, aperture F2.0, and optics overall length TTL (distance of eyeglass front end to image planes) TTL is
The optical system that 3.87mm, image height and TTL ratio are 0.71.The design parameter of imaging lens system group please refers to table 1 (a) and table 1
(b)。
Table 1 (a)
Table 1 (b)
| Surface serial number | K | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -0.53754 | -0.00759 | 0.072376 | -0.50812 | 1.180636 | -1.6155 | 0.794388 | -0.08152 |
| S2 | -29.895 | -0.35495 | 0.522234 | 2.160264 | -14.3966 | 32.48994 | -34.7186 | 14.68981 |
| S3 | -3.59921 | -0.356 | 1.142316 | 0.834926 | -12.2855 | 30.93462 | -34.6114 | 15.1306 |
| S4 | -81.0731 | 0.144555 | -0.23247 | 3.699409 | -16.1905 | 37.50302 | -44.9439 | 22.26947 |
| S5 | -3.75803 | -0.38942 | 0.129769 | 0.567123 | -2.21943 | 3.288335 | -1.34626 | 0 |
| S6 | -4.96412 | -0.32136 | 0.275681 | -1.47274 | 4.428445 | -7.09116 | 5.955837 | -1.95563 |
| S7 | -99 | 0.151229 | -0.10954 | -0.3278 | 0.668901 | -0.76323 | 0.436342 | -0.09251 |
| S8 | -8.45973 | 0.109596 | 0.194547 | -0.36936 | 0.171696 | -0.00424 | -0.01528 | 0.002804 |
| S9 | 97.81798 | -0.32571 | 0.210382 | -0.09316 | 0.05326 | -0.02474 | 0.005908 | -0.00055 |
| S10 | -6.30116 | -0.22445 | 0.180349 | -0.11451 | 0.047391 | -0.01183 | 0.001598 | -8.9E-05 |
The value that (R7+R8) of imaging lens system group/(R7-R8) value is 0.93, F2/F in the present embodiment is -1.7, F4/F's
The value that value is 0.55, Y1/ImgH is 0.28.
As shown in Fig. 2, being the X-Y scheme of imaging lens system group in the present embodiment.The lens shape of the optical system is evener
Claim, each face machining angle is less than 60 degree convenient for molding production.And eyeglass spacing is reasonable, designs convenient for the structure in later period.
As shown in figure 3, be the MTF transfer curve figure (optical transfer function) of imaging lens system group in the present embodiment, it can
With the image quality of concentrated expression system, curve shape is more smooth, and the height of opposite X-axis is higher, it was demonstrated that the imaging of system
Quality is better, camera lens of the present invention spatial frequency be (nyquist frequency/4) 138Lp/mm when 0.8 within each visual field mtf value it is equal
Greater than 0.5, clarity with higher.
As shown in figure 4, being the astigmatism curvature of field and optical distortion indicatrix of optical system in the present embodiment.Wherein left figure is
Astigmatism curvature of field indicatrix, abscissa are image planes position, and ordinate is image height, and S curve is sagitta of arc direction, and T is meridian direction, two
Curve deviates that Y-axis is smaller illustrates that the curvature of field is smaller, and S, T curve are closer to illustrating that astigmatism is smaller.Right figure is optical distortion indicatrix,
Abscissa is the percentage that practical image height position relative ideal image height position is deviateed, and ordinate is image height, it can be seen that system
Optical distortion is suppressed to lower than 2%.
As shown in figure 5, being the defocusing curve of optical system in the present embodiment, 0 visual field, 0.2 visual field, 0.4 view are respectively indicated
Field, 0.6 visual field, 0.8 visual field and 1.0 visual fields optical property and defocusing amount.Peak of curve distance center point is closer, indicates optics
Performance is better, and place is also smaller.
Embodiment 2
Field angle is 78 °, aperture F2.1, and optics overall length TTL (distance of eyeglass front end to image planes) TTL is
The optical system that 3.87mm, image height and TTL ratio are 0.72.
The design parameter of imaging lens system group please refers to table 2 (a) and table 2 (b)：
Table 2 (a)
Table 2 (b)
| Surface serial number | K | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -0.41167 | -0.01074 | 0.110784 | -0.91239 | 3.123525 | -6.03245 | 5.802542 | -2.29918 |
| S2 | -29.0369 | -0.36054 | 1.331159 | -2.57929 | 1.660458 | 1.227884 | -2.87688 | 1.555574 |
| S3 | -55.3349 | -0.40883 | 1.938303 | -3.06218 | -0.70843 | 10.33204 | -15.2047 | 7.649503 |
| S4 | -79.2412 | 0.207128 | -0.63501 | 4.660525 | -16.2928 | 32.38049 | -33.6461 | 14.03123 |
| S5 | -7.25682 | -0.4044 | 0.623024 | -2.52899 | 10.06984 | -23.9139 | 32.37771 | -18.1038 |
| S6 | 2.747718 | -0.22836 | -0.1075 | 0.563784 | -0.67967 | 0.192171 | 0.917052 | -0.67745 |
| S7 | -88.0953 | 0.164542 | -0.55629 | 0.629355 | -0.45885 | -0.0057 | 0.176093 | -0.05625 |
| S8 | 8.064945 | -0.04203 | 0.082281 | -0.15515 | 0.078752 | -0.01269 | 0 | 0 |
| S9 | -6.24652 | -0.7144 | 0.620087 | -0.27989 | 0.067754 | -0.00685 | -6.3E-05 | 2.19E-05 |
| S10 | -4.66325 | -0.34829 | 0.302219 | -0.19107 | 0.081507 | -0.02158 | 0.003131 | -0.00019 |
The value that (R7+R8) of imaging lens system group/(R7-R8) value is -0.96, F2/F in the present embodiment is -1.48, F4/F
Value be 4.88, Y1/ImgH value be 0.27.
As shown in fig. 6, being the X-Y scheme of imaging lens system group in the present embodiment.The lens shape of the optical system is evener
Claim, each face machining angle is less than 60 degree convenient for molding production.And eyeglass spacing is reasonable, designs convenient for the structure in later period.
As shown in fig. 7, be the MTF transfer curve figure (optical transfer function) of imaging lens system group in the present embodiment, it can
With the image quality of concentrated expression system, curve shape is more smooth, and the height of opposite X-axis is higher, it was demonstrated that the imaging of system
Quality is better, camera lens of the present invention spatial frequency be (nyquist frequency/4) 138Lp/mm when 0.8 within each visual field mtf value it is equal
Greater than 0.5, clarity with higher.
As shown in figure 8, being the astigmatism curvature of field and optical distortion indicatrix of optical system in the present embodiment.Wherein left figure is
Astigmatism curvature of field indicatrix, abscissa are image planes position, and ordinate is image height, and S curve is sagitta of arc direction, and T is meridian direction, two
Curve deviates that Y-axis is smaller illustrates that the curvature of field is smaller, and S, T curve are closer to illustrating that astigmatism is smaller.Right figure is optical distortion indicatrix,
Abscissa is the percentage that practical image height position relative ideal image height position is deviateed, and ordinate is image height, it can be seen that system
Optical distortion is suppressed to lower than 2%.
As shown in figure 9, being the defocusing curve of optical system in the present embodiment, 0 visual field, 0.2 visual field, 0.4 view are respectively indicated
Field, 0.6 visual field, 0.8 visual field and 1.0 visual fields optical property and defocusing amount.Peak of curve distance center point is closer, indicates optics
Performance is better, and place is also smaller.
Embodiment 3
Field angle is 79 °, aperture F2.1, and optics overall length TTL (distance of eyeglass front end to image planes) TTL is
The optical system that 3.87mm, image height and TTL ratio are 0.71.
The design parameter of imaging lens system group please refers to table 3 (a) and table 3 (b)：
Table 3 (a)
Table 3 (b)
| Surface serial number | K | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -0.5205 | -0.00568 | 0.066411 | -0.61433 | 2.033245 | -4.19259 | 4.330565 | -1.94946 |
| S2 | -29.895 | -0.24658 | 0.668886 | -0.57128 | -2.80217 | 7.75752 | -7.73569 | 2.561921 |
| S3 | -3.59921 | -0.24607 | 1.168966 | -2.34085 | 3.270476 | -5.41132 | 8.556444 | -6.04934 |
| S4 | -81.075 | 0.464234 | -2.20395 | 12.12746 | -42.367 | 91.26995 | -107.606 | 53.22375 |
| S5 | -3.75803 | -0.31691 | 0.060212 | 0.729609 | -2.9131 | 5.198992 | -2.53839 | 0 |
| S6 | -4.96411 | -0.23096 | 0.016637 | -0.58478 | 2.672092 | -5.21021 | 5.080801 | -1.86429 |
| S7 | -99 | 0.188686 | -0.55899 | 0.658847 | -0.57472 | 0.286801 | -0.05734 | 0 |
| S8 | -1.18335 | 0.278785 | -0.43353 | 0.360868 | -0.13068 | 0.015541 | 0.000428 | 0 |
| S9 | -77.8802 | -0.54191 | 0.173708 | 0.18212 | -0.14229 | 0.036313 | -0.00322 | 0 |
| S10 | -5.57557 | -0.3002 | 0.239634 | -0.12952 | 0.04605 | -0.01065 | 0.001414 | -7.9E-05 |
The value that the value that the value of (R7+R8)/(R7-R8) is 1.1, F2/F in the present embodiment is -1.41, F4/F is 0.86, Y1/
The value of ImgH is 0.25.
It as shown in Figure 10, is the X-Y scheme of imaging lens system group in the present embodiment.The lens shape of the optical system is evener
Claim, each face machining angle is less than 60 degree convenient for molding production.And eyeglass spacing is reasonable, designs convenient for the structure in later period.
It as shown in figure 11, is the MTF transfer curve figure (optical transfer function) of imaging lens system group in the present embodiment, it can
With the image quality of concentrated expression system, curve shape is more smooth, and the height of opposite X-axis is higher, it was demonstrated that the imaging of system
Quality is better, camera lens of the present invention spatial frequency be (nyquist frequency/4) 138Lp/mm when 0.8 within each visual field mtf value it is equal
Greater than 0.5, clarity with higher.
It as shown in figure 12, is the astigmatism curvature of field and optical distortion indicatrix of optical system in the present embodiment.Wherein left figure
For astigmatism curvature of field indicatrix, abscissa is image planes position, and ordinate is image height, and S curve is sagitta of arc direction, and T is meridian direction,
Two curves deviate that Y-axis is smaller illustrates that the curvature of field is smaller, and S, T curve are closer to illustrating that astigmatism is smaller.Right figure is that optical distortion feature is bent
Line, abscissa are the percentage that practical image height position relative ideal image height position is deviateed, and ordinate is image height, it can be seen that system
Optical distortion be suppressed to lower than 2%.
As shown in figure 13, it is the defocusing curve of optical system in the present embodiment, respectively indicates 0 visual field, 0.2 visual field, 0.4 view
Field, 0.6 visual field, 0.8 visual field and 1.0 visual fields optical property and defocusing amount.Peak of curve distance center point is closer, indicates optics
Performance is better, and place is also smaller.
The embodiment of the invention is described in detail above, but the content is only the preferable of the invention
Embodiment should not be considered as limiting the scope of the invention.It is all according to equivalent change made by the invention range with
Improve etc., it shall still fall within the scope of this patent.
Claims (4)
1. a kind of imaging lens system group, which is characterized in that the imaging lens system group from object side, successively by：With positive refracting power
The first lens (P1), have negative refractive power, and object side be convex surface, image side surface be concave surface the second lens of semilune (P2),
With negative refractive power, and object side is concave surface, and image side surface is the third lens (P3) on convex surface, has positive refracting power, and object side is close
It is convex surface at axis, image side surface is the 4th lens (P4) on convex surface and has negative refractive power, and object side is concave surface, the paraxial place in image side
It is formed for the 5th lens (P5) of concave surface, and meets conditional below：
-1<(R7+R8)/(R7-R8)<1.2
0.5<F4/F<6.5
Wherein, R7 is the object side of the 4th lens (P4), and R8 is respectively the image side curvature radius of the 4th lens (P4), F4 the
Four lens (P4) focal length, F are the 4th lens (P4) system focal length.
2. one of according to claim 1 imaging lens system group, which is characterized in that the imaging lens system group also meets following relationship
Formula：
0.2<Y1/ImgH<0.35
Wherein, Y1 is the effective clear aperture of image side surface of the second lens (P2), and ImgH is total image height.
3. one of according to claim 1 imaging lens system group, which is characterized in that the imaging lens system group also meets following relationship
Formula：
0.53<Y2/ImgH<0.95
Wherein, Y2 is the effective clear aperture of image side surface of the 4th lens (P4), and ImgH is total image height.
4. one of according to claim 1 imaging lens system group, which is characterized in that the imaging lens system group also meets following relationship
Formula：
-10.5<F2/F<-1.2
Wherein, F2 is the focal length of the second lens (P2), and F is system focal length.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627954A (en) * | 2018-05-15 | 2018-10-09 | 辽宁中蓝电子科技有限公司 | A kind of imaging lens system group |
| CN110166593A (en) * | 2019-05-20 | 2019-08-23 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
-
2018
- 2018-05-15 CN CN201820717186.6U patent/CN208172359U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627954A (en) * | 2018-05-15 | 2018-10-09 | 辽宁中蓝电子科技有限公司 | A kind of imaging lens system group |
| CN108627954B (en) * | 2018-05-15 | 2024-01-23 | 辽宁中蓝光电科技有限公司 | Image pickup lens group |
| CN110166593A (en) * | 2019-05-20 | 2019-08-23 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
| CN110166593B (en) * | 2019-05-20 | 2020-12-22 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
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