CN208477192U - Imaging optical system and photographic device with the imaging optical system - Google Patents
Imaging optical system and photographic device with the imaging optical system Download PDFInfo
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- CN208477192U CN208477192U CN201821268343.6U CN201821268343U CN208477192U CN 208477192 U CN208477192 U CN 208477192U CN 201821268343 U CN201821268343 U CN 201821268343U CN 208477192 U CN208477192 U CN 208477192U
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Abstract
A kind of imaging optical system and the photographic device with the imaging optical system, even if high imaging performance can be obtained in the whole visual field of big visual field, can also maintain imaging performance at a temperature of large-scale use environment.The imaging optical system includes convex surface towards object side and has the first lens of negative diopter；Convex surface is towards object side near optical axis, and has the point of inflexion at position of 40% height of the effective radius compared to object side closer to peripheral portion side, and whole second lens with negative diopter；The third lens with positive diopter；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter；The 5th lens with negative diopter；Convex surface is towards object side and image planes side and with the 6th lens of positive diopter；And convex surface is towards the 7th lens of object side；And meet conditional expression below, 0 < SAG3 (0.4)-SAG3 (1.0)≤0.10 (1).
Description
Technical field
The utility model relates to imaging optical system and with the photographic device of the imaging optical system.
Background technique
Imaging optical system used in vehicle-mounted video camera, monitoring video camera, it is desirable that in the full visual field of big visual field
With high imaging performance.On the other hand, recently as the miniaturization of the photographing elements such as CCD, CMOS, the development of high pixelation,
Its used imaging optical system is also required to miniaturization and has good optical property.In addition, considering vehicle
In the case where carrying the outdoor use such as use, preferably no matter how the temperature change of use environment can maintain imaging performance.
As the optical system for meeting above-mentioned requirements, it is known to by two aspherical plastic lens and five glass lens structures
At ultra-wide angle optical system (such as patent document 1).
Existing technical literature
Patent document
Patent document 1: Japanese Patent Laid-Open 2008-134494 bulletin
But the video camera of the photologging purposes in vehicle etc. equipped with automobile data recorder etc. in recent years.For in this way
Vehicle-mounted video camera for, there is high imaging performance simultaneously in big visual field and the full visual field with high standards, and require
The F number of optical system wants small, to meet highly sensitive camera shooting.Even if in addition, requiring simultaneously in larger range of use environment
At a temperature of be also able to maintain that imaging performance.
Utility model content
The utility model is to complete in order to solve the above-mentioned existing problems, and project is to realize following purposes.That is, this
Purpose of utility model is that high imaging performance can be obtained in the whole visual field of big visual field, can be realized and can expire by providing one kind
The highly sensitive optical system imaged and F number is small of foot, even if while being also able to maintain that at a temperature of large-scale use environment
Imaging optical system as performance and the photographic device with the imaging optical system.
Solution to the problems described above is as follows.That is, the imaging optical system of the utility model is for making subject figure
As imaging on solid-state imager, which is characterized in that successively include convex surface from object side towards object side and have negative
First lens of diopter；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There are the point of inflexion, and whole second lens with negative diopter at closer to the position of peripheral portion side；It is bent with positive
The third lens of luminosity；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter；With negative dioptric
5th lens of degree；Convex surface is towards object side and image planes side and with the 6th lens of positive diopter；And convex surface is towards object
Side and the 7th lens with negative diopter；First lens and the 4th lens are glass, and other lenses are aspherical plastics
Lens；Also, the imaging optical system meets conditional expression below；
0 < SAG3 (0.4)-SAG3 (1.0)≤0.10 (1)
Wherein, SAG3 (0.4) is the sag amount at 40% height of the effective radius of the object side of the second lens, SAG3
It (1.0) is the sag amount at the height of the effective radius end of the object side of the second lens.
In addition, preferably satisfying conditional expression below in the imaging optical system of the utility model.
0.40≤(SAG3(0.4PR)–SAG3(0.4))/(1/r3)≤1.00 (2)
Wherein, SAG3 (0.4PR) is the face of the object side of the second lens by the spherical surface of the paraxial curvature radius near optical axis
Sag amount at 40% height of effective radius when composition, r3 are the paraxial curvature radius in the face of the object side of the second lens.
In addition, preferably satisfying conditional expression below in the imaging optical system of the utility model.
–20.00≤(r9/r10)/(r11/r12)≤–4.00 (3)
- 0.85 < (r13/r14)/(r11/r12) < -0.67 (4)
Wherein, r9 is the paraxial curvature radius in the face of the object side of the 5th lens, and r10 is the face of the image side of the 5th lens
Paraxial curvature radius, r11 are the paraxial curvature radius in the face of the object side of the 6th lens, and r12 is the face of the image side of the 6th lens
Paraxial curvature radius, r13 is the paraxial curvature radius in the face of the object side of the 7th lens, and r14 is the image side of the 7th lens
The paraxial curvature radius in face.
In addition, the photographic device of the utility model is preferably provided with above-mentioned imaging optical system and solid-state imager.
(utility model effect)
According to the utility model, following effect can be realized, it may be assumed that can obtain high imaging in the full visual field of big visual field
Can, can be realized can meet the highly sensitive optical system imaged and F number is small, even if while in large-scale use environment temperature
Under be also able to maintain that imaging performance.
Detailed description of the invention
Fig. 1 is that the optics for the imaging optical system for indicating that the embodiments of the present invention 1 are related to is constituted and cutd open along optical axis
The cross-sectional view cut.
(a), (b), (c) in Fig. 2 are the infintie object point focusing for the imaging optical system for indicating that embodiment 1 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
Fig. 3 is that the optics for the imaging optical system for indicating that the embodiments of the present invention 2 are related to is constituted and cutd open along optical axis
The cross-sectional view cut.
(a), (b), (c) in Fig. 4 are the infintie object point focusing for the imaging optical system for indicating that embodiment 2 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
Fig. 5 is that the optics for the imaging optical system for indicating that the embodiments of the present invention 3 are related to is constituted and cutd open along optical axis
The cross-sectional view cut.
(a), (b), (c) in Fig. 6 are the infintie object point focusing for the imaging optical system for indicating that embodiment 3 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
Fig. 7 is that the optics for the imaging optical system for indicating that the embodiments of the present invention 4 are related to is constituted and cutd open along optical axis
The cross-sectional view cut.
(a), (b), (c) in Fig. 8 are the infintie object point focusing for the imaging optical system for indicating that embodiment 4 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
Fig. 9 is the figure for illustrating sag amount.
Figure 10 be indicate the utility model relates to the figure of defocusing amount that is generated because of temperature change of imaging optical system.
Specific embodiment
Hereinafter, being illustrated with reference to the accompanying drawings to the embodiments of the present invention.
Fig. 1 be the imaging optical system for indicating that the embodiments of the present invention 1 are related to optics constitute an example and along
The cross-sectional view of optical axis cutting.The optics of Fig. 1 constitutes the optics composition for corresponding to first embodiment.
The imaging optical system of the utility model successively includes convex surface towards object side from object side and has negative bend
First lens L1 of luminosity；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There is the point of inflexion (inflection point) at closer to the position of peripheral portion side, and whole have the of negative diopter
Two lens L2；The third lens L3 with positive diopter；Aperture diaphragm S；Convex surface is towards object side and image planes side and has just
Diopter the 4th lens L4；The 5th lens L5 with negative diopter；Convex surface is towards object side and image planes side and has
6th lens L6 of positive diopter；And convex surface towards object side and has the 7th lens L7 of negative diopter.
In addition, the CG in cross-sectional view that optics is constituted indicates cover-plate glass (cover in following all examples
Glass), I indicates the imaging surface of photographing element.
Photographing element configured with CCD etc. in the imaging surface I of the imaging optical system of the utility model.Moreover, the 7th
Between lens L7 and photographing element, various optical components can also be configured according to the composition of the camera side of mounted lens.Example
Such as, the tabular optical component of cover-plate glass, cutoff filter of imaging surface protection etc. can also be configured.
In addition, the imaging optical system of the utility model is configured to the optical system that projection pattern is equidistant projection's mode
It unites (fish-eye lens), to ensure the visibility of wide-field peripheral part.
The first lens and the 4th lens in the imaging optical system of present embodiment are glass, and other lenses are aspherical
Plastic lens, and meet conditional expression below.
0 < SAG3 (0.4)-SAG3 (1.0)≤0.10 (1)
Wherein, SAG3 (0.4) is the sag amount at 40% height of the effective radius of the object side of the second lens, SAG3
It (1.0) is the sag amount at the height of the effective radius end of the object side of the second lens.
In addition, the imaging optical system of present embodiment meets conditional expression below.
0.40≤(SAG3(0.4PR)–SAG3(0.4))/(1/r3)≤1.00 (2)
Wherein, SAG3 (0.4PR) is the face of the object side of the second lens by the spherical surface of the paraxial curvature radius near optical axis
Sag amount at 40% height of effective radius when composition, r3 are the paraxial curvature radius in the face of the object side of the second lens.
Conditional expression (1) or conditional expression (2) are the big visual fields that can be achieved at the same time entire imaging optical system
With the conditional expression of the reduction of curvature of the image.
If the range beyond conditional expression (1) or conditional expression (2), bending outside the diopter and axis near optical axis
Larger difference is generated between luminosity, so as to cause because the variation of curvature of the image caused by the variation of object distance becomes aobvious
It writes, thus it is unsatisfactory.In addition, the correction of axial chromatic aberration, spherical aberration becomes difficult.
Here, being illustrated referring to Fig. 9 to sag amount.
In the imaging optical system of the utility model, " the sag amount at 40% height of the effective radius of lens face " refers to:
At 40% height of effective radius, in the direction parallel with optical axis between lens face and the plane P passed through at the top of lens face
On distance SAG (0.4).In addition, " the sag amount at the height of the effective radius end of lens face " refers to: in the effective of lens
At the height of radii ends, between lens face and the plane P passed through at the top of the lens face in a direction parallel to the optical axis away from
From SAG (1.0).In addition, " 40% of effective radius when lens face is made of the spherical surface of the paraxial curvature radius near optical axis is high
Sag amount at degree " refers to: at 40% height of effective radius, the benchmark spherical surface of lens face shown in dotted line with from lens face
In distance SAG (0.4PR) in optical axis parallel direction between the plane P that top passes through.
The imaging optical system of present embodiment, by configuring diaphragm in the object side of the 4th lens, and the 4th lens make
With glass, can compensate for because of the influence that the focal position of optical system caused by diopter variation changes, wherein the dioptric
Degree, which changes, to be generated because of the temperature change of the use environment of plastic lens used in imaging optical system.
In addition, the imaging optical system of present embodiment meets conditional expression below.
–20.00≤(r9/r10)/(r11/r12)≤–4.00 (3)
- 0.85 < (r13/r14)/(r11/r12) < -0.67 (4)
Wherein, r9 is the paraxial curvature radius in the face of the object side of the 5th lens, and r10 is the face of the image side of the 5th lens
Paraxial curvature radius, r11 are the paraxial curvature radius in the face of the object side of the 6th lens, and r12 is the face of the image side of the 6th lens
Paraxial curvature radius, r13 is the paraxial curvature radius in the face of the object side of the 7th lens, and r14 is the image side of the 7th lens
The paraxial curvature radius in face.
Conditional expression (3) and conditional expression (4) are for effectively compensating for because of light caused by diopter variation
The conditional expression for the influence that the focal position of system changes, wherein diopter variation is because in imaging optical system
The temperature change of the use environment of the plastic lens used and generate.
When the respectively lower than lower limit value of conditional expression (3) and conditional expression (4), the variation of focal position becomes larger,
The range of temperature use environment narrows, thus unsatisfactory.In addition, the curvature of the image when being higher than upper limit value, in bigger visual field
Increase, the variation of focal position becomes larger, thus unsatisfactory.
The solid that the photographic device of the utility model has imaging optical system and CCD, CMOS of the utility model etc. is taken the photograph
Element.
[embodiment]
Next, enumerating the specific value embodiment of the imaging optical system of the utility model.Used in each embodiment
Symbol is as follows.
F: the focal length of imaging optical system entirety
FNO:F number
FOV (2 ω): visual field
R: paraxial curvature radius
D: the thickness of the lens on optical axis or airspace
Nd: refractive index of the lens material relative to d line
ν d: the Abbe number of lens material
In addition, in embodiments, the face that " * " is recorded after each face number is the face for being in aspherical shape.
In addition, aspherical shape is y to take optical axis direction be z, takes direction orthogonal with the optical axis, and circular cone coefficient is set as
K, when asphericity coefficient is set as A4, A6, A8, A10 ..., following formula (I) is indicated.
Z=(y2/r)/[1+{1-(1+K)(y/r)2}1/2]+A4y4+A6y6+A8y8+A10y10……(I)
In addition, E indicates 10 exponential, such as 2.3 × 10 in asphericity coefficient-2It is expressed as 2.3E-002.In addition, this
The symbol of a little specification values is general in the numeric data of aftermentioned embodiment.
(embodiment 1)
Then, the imaging optical system being related to for embodiment 1 is illustrated.
Fig. 1 is that the optics for the imaging optical system for indicating that embodiment 1 is related to is constituted and along the cross-sectional view of optical axis cutting.
(a), (b), (c) in Fig. 2 are the infintie object point focusing for the imaging optical system for indicating that embodiment 1 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.Y in figure indicates image height.In addition, the symbol in aberration diagram
It is number general in the examples described below.
As shown in Figure 1, the imaging optical system successively includes convex surface towards object side from object side and has negative bend
First lens L1 of luminosity；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There is the point of inflexion, and the whole second lens L2 with negative diopter at closer to the position of peripheral portion side；With positive
The third lens L3 of diopter；Aperture diaphragm S；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter
L4；The 5th lens L5 with negative diopter；Convex surface towards object side and image planes side and with positive diopter the 6th thoroughly
Mirror L6；And convex surface towards object side and has the 7th lens L7 of negative diopter.
The whole specification of the imaging optical system of embodiment 1 is as follows.
F:1.57mm
FNO:2.00
Visual field (2 ω): 215.6mm
The face data of the imaging optical system of embodiment 1 is (unit: mm) as follows.
[table 1]
<lens data of embodiment 1>
The aspherical surface data of the imaging optical system of embodiment 1 is as follows.
Third face
K=0
A4=-3.238787E-03, A6=2.739204E-05, A8=2.720794E-05, A10=-2.100624E-
06, A12=2.925206E-08, A14=2.883738E-09, A16=-9.484511E-11
Fourth face
K=-5.773839E-01
A4=1.431090E-02, A6=9.171210E-03, A8=5.568341E-05, A10=-1.302211E-
03, A12=5.904507E-04, A14=-1.861136E-05, A16=-8.997014E-06
5th face
K=0.000000E+00
A4=2.101120E-02, A6=5.265874E-04, A8=1.754329E-03, A10=-3.299894E-
04, A12=1.223274E-04, A14=-2.718917E-06, A16=0.000000E+00
6th face
K=0.000000E+00
A4=1.275800E-02, A6=-2.652842E-03, A8=6.851649E-03, A10=-3.771824E-
03, A12=1.279752E-03, A14=-6.825899E-05, A16=0.000000E+00
Tenth face
K=0.000000E+00
A4=-1.216479E-01, A6=1.993466E-02, A8=3.104315E-03, A10=-7.041519E-
03, A12=1.645342E-03, A14=0.000000E+00, A16=0.000000E+00
Tenth one side
K=-4.173725E+00
A4=-4.824314E-02, A6=2.381108E-02, A8=-8.072314E-03, A10=1.445198E-
03, A12=-1.200103E-04, A14=0.000000E+00, A16=0.000000E+00
12nd face
K=0.000000E+00
A4=-7.726630E-03, A6=-7.825077E-04, A8=2.376442E-03, A10=-7.907222E-
04, A12=1.235153E-04, A14=-7.485622E-06, A16=0.000000E+00
13rd face
K=0.000000E+00
A4=-5.371712E-04, A6=7.761134E-03, A8=-3.414408E-03, A10=1.231547E-
03, A12=-2.136644E-04, A14=2.281086E-05, A16=0.000000E+00
Tenth four sides
K=0.000000E+00
A4=-3.934993E-02, A6=4.108994E-04, A8=4.586677E-05, A10=-3.566424E-
05, A12=1.200632E-05, A14=-8.072060E-08, A16=-1.671053E-08
15th face
K=0.000000E+00
A4=-5.714263E-02, A6=-9.899395E-04, A8=2.107978E-04, A10=5.782931E-
05, A12=-1.156932E-05, A14=8.856278E-08, A16=-1.677939E-08
Value corresponding to the conditional expression (1) to (4) of the imaging optical system of embodiment 1 is as follows.
(1) SAG3 (0.4)-SAG3 (1.0)=0.10
(2) (SAG (0.4PR)-SAG3 (0.4))/(1/r3)=0.999
(3) (r9/r10)/(r11/r12)=- 4.00
(4) (r13/r14)/(r11/r12)=- 0.68
In addition, first lens and the 4th lens are formed by glass material in the imaging optical system of embodiment 1, other
Lens are molded of plastic material.
(embodiment 2)
Then, the imaging optical system being related to embodiment 2 is illustrated.
Fig. 3 is when the optics for the imaging optical system for indicating that embodiment 2 is related to is constituted and focused along infintie object point
The cross-sectional view of optical axis cutting.
(a), (b), (c) in Fig. 4 are the infintie object point focusing for the imaging optical system for indicating that embodiment 2 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
As shown in figure 3, the imaging optical system successively includes convex surface towards object side from object side and has negative bend
First lens L1 of luminosity；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There is the point of inflexion, and the whole second lens L2 with negative diopter at closer to the position of peripheral portion side；With positive
The third lens L3 of diopter；Aperture diaphragm S；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter
L4；The 5th lens L5 with negative diopter；Convex surface towards object side and image planes side and with positive diopter the 6th thoroughly
Mirror L6；And convex surface towards object side and has the 7th lens L7 of negative diopter.
The whole specification of the imaging optical system of embodiment 2 is as follows.
F:1.55mm
FNO:1.99
Visual field (2 ω): 215.6mm
The face data of the imaging optical system of embodiment 2 is (unit: mm) as follows.
[table 2]
<lens data of embodiment 2>
The aspherical surface data of the imaging optical system of embodiment 2 is as follows.
Third face
K=0
A4=-3.056009E-03, A6=2.309935E-05, A8=2.644585E-05, A10=-2.189595E-
06, A12=2.273124E-08, A14=2.535584E-09, A16=-5.985130E-11
Fourth face
K=-5.773839E-01
A4=1.431090E-02, A6=9.171210E-03, A8=5.568341E-05, A10=-1.302211E-
03, A12=5.904507E-04, A14=-1.861136E-05, A16=-8.997014E-06
5th face
K=0.000000E+00
A4=2.101120E-02, A6=5.265874E-04, A8=1.754329E-03, A10=-3.299894E-
04, A12=1.223274E-04, A14=-2.718917E-06, A16=0.000000E+00
6th face
K=0.000000E+00
A4=1.275800E-02, A6=-2.652842E-03, A8=6.851649E-03, A10=-3.771824E-
03, A12=1.279752E-03, A14=-6.825899E-05, A16=0.000000E+00
Tenth face
K=0.000000E+00
A4=-1.152754E-01, A6=1.933919E-02, A8=2.826266E-03, A10=-6.917098E-
03, A12=1.621803E-03, A14=0.000000E+00, A16=0.000000E+00
Tenth one side
K=-4.620595E+00
A4=-4.856460E-02, A6=2.371410E-02, A8=-8.160781E-03, A10=1.419414E-
03, A12=-1.203655E-04, A14=0.000000E+00, A16=0.000000E+00
12nd face
K=0.000000E+00
A4=-8.428828E-03, A6=-8.124669E-04, A8=2.396105E-03, A10=-7.856297E-
04, A12=1.239945E-04, A14=-7.903220E-06, A16=0.000000E+00
13rd face
K=0.000000E+00
A4=1.921320E-04, A6=7.956772E-03, A8=-3.367168E-03, A10=1.239375E-
03, A12=-2.125686E-04, A14=2.290866E-05, A16=0.000000E+00
Tenth four sides
K=0.000000E+00
A4=-3.871070E-02, A6=4.516638E-04, A8=6.398336E-05, A10=-3.250780E-
05, A12=1.230160E-05, A14=-4.338388E-08, A16=-1.206850E-08
15th face
K=0.000000E+00
A4=-5.461058E-02, A6=-9.214580E-04, A8=2.011959E-04, A10=5.663975E-
05, A12=-1.171496E-05, A14=3.298426E-08, A16=1.650895E-09
Value corresponding to the conditional expression (1) to (4) of the imaging optical system of embodiment 2 is as follows.
(1) SAG3 (0.4)-SAG3 (1.0)=0.097
(2) (SAG (0.4PR)-SAG3 (0.4))/(1/r3)=0.801
(3) (r9/r10)/(r11/r12)=- 8.00
(4) (r13/r14)/(r11/r12)=- 0.71
In addition, first lens and the 4th lens are formed by glass material in the imaging optical system of embodiment 2, other
Lens are molded of plastic material.
(embodiment 3)
Then, the imaging optical system being related to embodiment 3 is illustrated.
Fig. 5 is when the optics for the imaging optical system for indicating that embodiment 3 is related to is constituted and focused along infintie object point
The cross-sectional view of optical axis cutting.
(a), (b), (c) in Fig. 6 are the infintie object point focusing for the imaging optical system for indicating that embodiment 3 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
As shown in figure 5, the imaging optical system successively includes convex surface towards object side from object side and has negative bend
First lens L1 of luminosity；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There is the point of inflexion, and the whole second lens L2 with negative diopter at closer to the position of peripheral portion side；With positive
The third lens L3 of diopter；Aperture diaphragm S；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter
L4；The 5th lens L5 with negative diopter；Convex surface towards object side and image planes side and with positive diopter the 6th thoroughly
Mirror L6；And convex surface towards object side and has the 7th lens L7 of negative diopter.
The whole specification of the imaging optical system of embodiment 3 is as follows.
F:1.58mm
FNO:2.02
Visual field (2 ω): 215.6mm
The face data of imaging optical system is (unit: mm) as follows in embodiment 3.
[table 3]
<lens data of embodiment 3>
The aspherical surface data of the imaging optical system of embodiment 3 is as follows.
Third face
K=0
A4=-2.960943E-03, A6=7.928436E-06, A8=2.609345E-05, A10=-2.143996E-
06, A12=3.197959E-08, A14=2.945096E-09, A16=-9.077604E-11
Fourth face
K=-5.773839E-01
A4=1.431090E-02, A6=9.171210E-03, A8=5.568341E-05, A10=-1.302211E-
03, A12=5.904507E-04, A14=-1.861136E-05, A16=-8.997014E-06
5th face
K=0.000000E+00
A4=2.101120E-02, A6=5.265874E-04, A8=1.754329E-03, A10=-3.299894E-
04, A12=1.223274E-04, A14=-2.718917E-06, A16=0.000000E+00
6th face
K=0.000000E+00
A4=1.275800E-02, A6=-2.652842E-03, A8=6.851649E-03, A10=-3.771824E-
03, A12=1.279752E-03, A14=-6.825899E-05, A16=0.000000E+00
Tenth face
K=0.000000E+00
A4=-9.774424E-02, A6=6.873312E-03, A8=2.096713E-03, A10=-2.588459E-
03, A12=4.722936E-04, A14=0.000000E+00, A16=0.000000E+00
Tenth one side
K=-1.651414E+00
A4=-4.856460E-02, A6=2.371410E-02, A8=-8.160781E-03, A10=1.419414E-
03, A12=-1.203655E-04, A14=0.000000E+00, A16=0.000000E+00
12nd face
K=0.000000E+00
A4=3.568857E-03, A6=-3.776970E-03, A8=1.123331E-03, A10=-6.143147E-
05, A12=-7.183638E-06, A14=5.056919E-07, A16=0.000000E+00
13rd face
K=0.000000E+00
A4=1.493969E-03, A6=5.022585E-03, A8=-7.200488E-04, A10=1.785570E-
04, A12=7.533687E-06, A14=2.292418E-06, A16=0.000000E+00
Tenth four sides
K=0.000000E+00
A4=-4.021554E-02, A6=2.045991E-04, A8=7.867371E-05, A10=-2.743326E-
05, A12=1.340745E-05, A14=-4.499559E-08, A16=2.909308E-09
15th face
K=0.000000E+00
A4=-5.567138E-02, A6=-8.717705E-04, A8=1.720831E-04, A10=6.182501E-
05, A12=-1.101699E-05, A14=2.321809E-07, A16=-2.584455E-08
The aspherical surface data of the imaging optical system of embodiment 3 is as follows.
Value corresponding to the conditional expression (1) to (4) of the imaging optical system of embodiment 3 is as follows.
(1) SAG3 (0.4)-SAG3 (1.0)=0.092
(2) (SAG (0.4PR)-SAG3 (0.4))/(1/r3)=0.509
(3) (r9/r10)/(r11/r12)=- 16.00
(4) (r13/r14)/(r11/r12)=- 0.79
In addition, first lens and the 4th lens are formed by glass material in the imaging optical system of embodiment 3, other
Lens are molded of plastic material.
(embodiment 4)
Then, the imaging optical system being related to embodiment 4 is illustrated.
Fig. 7 is when the optics for the imaging optical system for indicating that embodiment 4 is related to is constituted and focused along infintie object point
The cross-sectional view of optical axis cutting.
(a), (b), (c) in Fig. 8 are the infintie object point focusing for the imaging optical system for indicating that embodiment 4 is related to respectively
When spherical aberration (SA), astigmatism (AS), distortion aberration (DT) figure.
As shown in fig. 7, the imaging optical system successively includes convex surface towards object side from object side and has negative bend
First lens L1 of luminosity；Convex surface is towards object side near optical axis, and in 40% height of the effective radius compared to object side
There is the point of inflexion, and the whole second lens L2 with negative diopter at closer to the position of peripheral portion side；With positive
The third lens L3 of diopter；Aperture diaphragm S；Convex surface is towards object side and image planes side and with the 4th lens of positive diopter
L4；The 5th lens L5 with negative diopter；Convex surface towards object side and image planes side and with positive diopter the 6th thoroughly
Mirror L6；And convex surface towards object side and has the 7th lens L7 of negative diopter.
The whole specification of the imaging optical system of embodiment 4 is as follows.
F:1.59mm
FNO:2.03
Visual field (2 ω): 215.6mm
The face data of the imaging optical system of embodiment 4 is (unit: mm) as follows
[table 4]
<lens data of embodiment 4>
The aspherical surface data of the imaging optical system of embodiment 4 is as follows.
Third face
K=0
A4=-3.425113E-03, A6=3.010288E-05, A8=2.870545E-05, A10=-2.053617E-
06, A12=1.838953E-08, A14=6.229889E-10, A16=-7.832775E-12
Fourth face
K=-5.773839E-01
A4=1.431090E-02, A6=9.171210E-03, A8=5.568341E-05, A10=-1.302211E-
03, A12=5.904507E-04, A14=-1.861136E-05, A16=-8.997014E-06
5th face
K=0.000000E+00
A4=2.101120E-02, A6=5.265874E-04, A8=1.754329E-03, A10=-3.299894E-
04, A12=1.223274E-04, A14=-2.718917E-06, A16=0.000000E+00
6th face
K=0.000000E+00
A4=1.275800E-02, A6=-2.652842E-03, A8=6.851649E-03, A10=-3.771824E-
03, A12=1.279752E-03, A14=-6.825899E-05, A16=0.000000E+00
Tenth face
K=0.000000E+00
A4=-9.866837E-02, A6=6.090941E-03, A8=8.772997E-03, A10=-7.713312E-
03, A12=1.359645E-03, A14=0.000000E+00, A16=0.000000E+00
Tenth one side
K=-2.069940E+00
A4=-6.969940E-02, A6=2.514346E-02, A8=-6.641872E-03, A10=8.960574E-
04, A12=-6.211499E-05, A14=0.000000E+00, A16=0.000000E+00
12nd face
K=0.000000E+00
A4=6.237659E-04, A6=-4.156068E-03, A8=1.234072E-03, A10=-6.315774E-
05, A12=-1.166642E-05, A14=1.427801E-06, A16=0.000000E+00
13rd face
K=0.000000E+00
A4=1.630909E-03, A6=3.607355E-03, A8=-5.139392E-04, A10=1.060072E-
04, A12=-8.766957E-06, A14=5.765256E-06, A16=0.000000E+00
Tenth four sides
K=0.000000E+00
A4=-3.807754E-02, A6=-3.003773E-04, A8=-4.083347E-04, A10=-
1.439993E-04 A12=2.726343E-05, A14=3.170592E-07, A16=3.670916E-09
15th face
K=0.000000E+00
A4=-4.843252E-02, A6=-2.801785E-03, A8=5.233040E-05, A10=5.918843E-
05, A12=-9.428403E-06, A14=1.715348E-06, A16=-2.537183E-07
Value corresponding to the conditional expression (1) to (4) of the imaging optical system of embodiment 4 is as follows.
(1) SAG3 (0.4)-SAG3 (1.0)=0.098
(2) (SAG3 (0.4PR)-SAG3 (0.4))/(1/r3)=0.401
(3) (r9/r10)/(r11/r12)=- 20.00
(4) (r13/r14)/(r11/r12)=- 0.84
In addition, first lens and the 4th lens are formed by glass material in the imaging optical system of embodiment 4, other
Lens are molded of plastic material.
Figure 10 be indicate it is above-mentioned the utility model relates to the imaging optical system of each embodiment draw because of temperature change
The figure of the defocusing amount risen.
As shown in Figure 10, the utility model relates to embodiment 1 to embodiment 4 imaging optical system, -40 DEG C to+
In 85 DEG C of use environment, can by the focal position variation (defocusing amount) of optical system control in 0.040mm hereinafter, to
It can effectively compensate for because of the influence that the focal position of optical system caused by the temperature change of use environment changes.
Symbol description
The first lens of L1
The second lens of L2
L3 the third lens
The 4th lens of L4
The 5th lens of L5
The 6th lens of L6
The 7th lens of L7
CG cover-plate glass
I imaging surface
S aperture diaphragm.
Claims (4)
1. a kind of imaging optical system is used to that subject image to be made to image in solid-state imager,
The imaging optical system is characterized in that, is successively included from object side
First lens, convex surface is towards object side and has negative diopter；
Second lens, near optical axis convex surface towards object side, and compared to object side effective radius 40% height more
There is the point of inflexion at the position of peripheral portion side, and whole with negative diopter；
The third lens, with positive diopter；
Aperture diaphragm；
4th lens, convex surface is towards object side and image planes side and has positive diopter；
5th lens have negative diopter；
6th lens, convex surface is towards object side and image planes side and has positive diopter；And
7th lens, convex surface is towards object side and has negative diopter；
First lens and the 4th lens are glass, and other lenses are aspherical plastic lens；
The imaging optical system meets conditional expression below；
0 < SAG3 (0.4)-SAG3 (1.0)≤0.10 (1)
Wherein, SAG3 (0.4) is the sag amount at 40% height of the effective radius of the object side of the second lens, and SAG3 (1.0) is
Sag amount at the height of the effective radius end of the object side of second lens.
2. imaging optical system as described in claim 1, which is characterized in that meet conditional expression below；
0.40≤(SAG3(0.4PR)–SAG3(0.4))/(1/r3)≤1.00 (2)
Wherein, SAG3 (0.4PR) is that the face of the object side of the second lens is made of the spherical surface of the paraxial curvature radius near optical axis
When effective radius 40% height place sag amount, r3 for the second lens object side face paraxial curvature radius.
3. imaging optical system as claimed in claim 1 or 2, which is characterized in that meet conditional expression below；
–20.00≤(r9/r10)/(r11/r12)≤–4.00 (3)
- 0.85 < (r13/r14)/(r11/r12) < -0.67 (4)
Wherein, r9 is the paraxial curvature radius in the face of the object side of the 5th lens, and r10 is the paraxial of the face of the image side of the 5th lens
Radius of curvature, r11 are the paraxial curvature radius in the face of the object side of the 6th lens, and r12 is the close of the face of the image side of the 6th lens
Curvature shaft radius, r13 are the paraxial curvature radius in the face of the object side of the 7th lens, and r14 is the face of the image side of the 7th lens
Paraxial curvature radius.
4. a kind of photographic device, which is characterized in that have imaging optical system described in any one of claims 1 to 3 and consolidate
Body photographing element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821268343.6U CN208477192U (en) | 2018-08-07 | 2018-08-07 | Imaging optical system and photographic device with the imaging optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821268343.6U CN208477192U (en) | 2018-08-07 | 2018-08-07 | Imaging optical system and photographic device with the imaging optical system |
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| Publication Number | Publication Date |
|---|---|
| CN208477192U true CN208477192U (en) | 2019-02-05 |
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ID=65209375
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794556A (en) * | 2019-11-01 | 2020-02-14 | 江西联创电子有限公司 | Wide-angle lens and panoramic camera system |
| WO2021128125A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Photographic optical lens |
| CN113448059A (en) * | 2019-11-06 | 2021-09-28 | 浙江舜宇光学有限公司 | Optical imaging lens |
-
2018
- 2018-08-07 CN CN201821268343.6U patent/CN208477192U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794556A (en) * | 2019-11-01 | 2020-02-14 | 江西联创电子有限公司 | Wide-angle lens and panoramic camera system |
| CN113448059A (en) * | 2019-11-06 | 2021-09-28 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN113448059B (en) * | 2019-11-06 | 2022-07-08 | 浙江舜宇光学有限公司 | Optical imaging lens |
| WO2021128125A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Photographic optical lens |
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