CN104407431B - A kind of optical lens - Google Patents
A kind of optical lens Download PDFInfo
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- CN104407431B CN104407431B CN201410734104.5A CN201410734104A CN104407431B CN 104407431 B CN104407431 B CN 104407431B CN 201410734104 A CN201410734104 A CN 201410734104A CN 104407431 B CN104407431 B CN 104407431B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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Abstract
The present invention relates to a kind of optical lens.The optical lens includes the front lens group with positive light coke, aperture member, the rear lenses group with positive light coke successively from the object side to the image side；Front lens group is included with negative power and concave surface towards the first lens of the crescent of image space successively from the object side to the image side, the second lens of the biconvex with positive light coke；Rear lenses group from the object side to the image side successively the 3rd lens including the concave-concave with negative power, with positive light coke and concave surface towards the 4th lens of the crescent of object space and the balsaming lens being made up of the 5th lens and the 6th lens.Under the conditions of low cost, miniaturization is met, realize high pixel, small, large aperture of distorting, high pass optical property and meet fine definition requirement, the effectively various aberrations of correction optical system, more perfect imaging definition can be still kept within the temperature range of 40 DEG C~+85 DEG C simultaneously, especially suitable for taking into account day and night or the poor monitoring of lighting condition and in-vehicle camera system.
Description
Technical field
The present invention relates to optical image technology field, more particularly to a kind of optical lens.
Background technology
With the development of auto industry active safety, the requirement to vehicle-mounted front view lens improves constantly.Particularly phase unit
Fill the limitation in space so that the trend toward miniaturization of camera lens is increasingly apparent.Keep lens distortion is small, mega pixel, large aperture
Under the premise of, it is desirable to the overall length of camera lens is more short better.Meanwhile possesses low cost and can be in -40 DEG C~+85 DEG C of temperature range
It is interior to keep more perfect imaging definition.
Wide-angle indoor monitoring and in-vehicle camera camera lens at present on the market can't meet inexpensive, high pixel, distortion
The miniaturization of camera lens is realized on the premise of small, large aperture imaging.
The content of the invention
It is an object of the invention to propose a kind of optical lens, can meet low cost, miniaturization requirement condition under,
Realize high pixel, small, large aperture of distorting, and still keep perfectly being imaged within the temperature range of -40 DEG C~85 DEG C, it is particularly suitable
In taking into account day and night or the poor monitoring of lighting condition and in-vehicle camera system.
To use following technical scheme up to this purpose, the present invention：
A kind of optical lens, includes successively from the object side to the image side：Front lens group, aperture member with positive light coke,
Rear lenses group with positive light coke；
Wherein, the front lens group includes successively from the object side to the image side：First lens, the second lens, described first is saturating
Mirror is with negative power and concave surface is towards the crescent lens of image space, and second lens are the lenticular with positive light coke
Mirror；The rear lenses group includes successively from the object side to the image side：3rd lens, the 4th lens, the 5th lens and the 6th lens, institute
It is the biconcave lens with negative power to state the 3rd lens, and the 4th lens are towards object space with positive light coke and concave surface
Crescent lens, the 5th lens and the 6th lens form a balsaming lens；
Wherein, the lens with positive light coke in the balsaming lens meet following condition：
Vd (just) ＞ 72, and dn/dt (just) ＜ -5*10-6/℃
Wherein, Vd (just) refers to the Abbe constant of the material of the lens with positive light coke in the balsaming lens, dn/
Dt (just) refers to the variable quantity that the refractive index of the lens with positive light coke in the balsaming lens varies with temperature.
Wherein, the 5th lens in the balsaming lens be with negative power and concave surface it is saturating towards the crescent of image space
Mirror, the 6th lens in the balsaming lens are the biconvex lens with positive light coke.
Wherein, the 5th lens in the balsaming lens are the biconvex lens with positive light coke, in the balsaming lens
The 6th lens be crescent lens with negative power and concave surface towards object space.
Wherein, the whole group of the focal length value of the lens with positive light coke in the balsaming lens and the optical lens is burnt
Meet below equation away from value：
1.6 >=F (just)/F >=1.2
Wherein, F (just) refers to the focal length value of the lens with positive light coke in the balsaming lens, and F represents the light
Learn the whole group focal length value of camera lens.
Wherein, first lens meet below equation：
Nd (1)≤1.65, Vd (1) >=55, -0.9 >=F1/F >=-1.8
Wherein, Nd (1) is the refractive index of the material of the first lens, and Vd (1) is the Abbe constant of the material of the first lens, F1
It is the focal length value of the first lens, F is the whole group focal length value of the optical lens.
Wherein, second lens meet below equation：
Nd (2) >=1.8, Vd (2) >=40
Wherein, Nd (2) is the refractive index of the material of the second lens, and Vd (2) is the Abbe constant of the material of the second lens.
Wherein, the whole group focal length value of the focal length of the front lens group, the focal length of rear lenses group and the optical lens
Meet below equation：
2.7 >=F (preceding)/F >=1.8,2.0 >=F (rear)/F >=1.2
Wherein, (preceding) focal length values for representing front lens group of F, (rear) focal length values for representing rear lenses group of F, F represent institute
State the whole group focal length value of optical lens.
Wherein, the optical length of the optical lens and optic back focal meet following condition：
TTL/F≤3.5, BFL/F >=0.9
Wherein, TTL represents the optical length of the optical lens, i.e., the object space side of the first lens of described optical lens is most
For exterior point to the distance of the imaging focal plane of the optical lens, BFL represents the optic back focal of the optical lens, i.e., described optics
For the image side outermost point of 6th lens of camera lens to the distance of the imaging focal plane of the optical lens, F represents the optical frames
The whole group focal length value of head.
Wherein, the F-number FNO of the optical lens meets below equation：
FNO≤1.8
Total angle of visual field FOV of the optical lens meets below equation：
80°≥FOV≥40°
The angle of visual field of the maximum clear aperture of first lens and corresponding imaging image height and the optical lens meets
Below equation：
D/h/FOV≤0.02
Wherein, FOV represents the maximum field of view angle of the optical lens, and D represents the first lens direction corresponding to maximum FOV
The maximum clear aperture of the curved surface of object space, h represent the imaging image height corresponding to maximum FOV.
Wherein, first lens to the 6th lens use glass material, wherein, the second lens, the 3rd lens, the 4th
The lens with negative power in lens and balsaming lens use the material of high index of refraction.
Beneficial effect：
A kind of optical lens of the present invention, by using 6 lens structures, meeting inexpensive, miniaturization want
Under the conditions of asking, realize high pixel, small, large aperture of distorting, high pass optical property and meet fine definition requirement, and effectively correct light
The various aberrations of system, while can ensure still to keep more perfect imaging clearly within the temperature range of -40 DEG C~+85 DEG C
Degree, especially suitable for taking into account day and night or the poor monitoring of lighting condition and in-vehicle camera system.
Brief description of the drawings
Fig. 1 is a kind of structural representation for optical lens that the specific embodiment of the invention provides.
Fig. 2 is the MTF resolving curved lines of optical lens in Fig. 1.
Fig. 3 is the astigmatism curve map of optical lens in Fig. 1.
Fig. 4 is the distortion curve figure of optical lens in Fig. 1.
Fig. 5 is the structural representation for another optical lens that the specific embodiment of the invention provides.
Fig. 6 is the MTF resolving curved lines of optical lens in Fig. 5.
Fig. 7 is the astigmatism curve map of optical lens in Fig. 5.
Fig. 8 is the distortion curve figure of optical lens in Fig. 5.
In figure：
The lens of L1- first；The lens of L2- second；The lens of L3- the 3rd；The lens of L4- the 4th；The lens of L5- the 5th；L6- the 6th is saturating
Mirror；L7- aperture members；L8- colour filters；L9- imaging surfaces；The two sides of the lens of S1, S2- first；The two sides of the lens of S3, S4- second；
S5- aperture members face；The two sides of the lens of S6, S7- the 3rd；The two sides of the lens of S8, S9- the 4th；The two of the lens of S10, S11- the 5th
Face；The two sides of the lens of S11, S12- the 6th；The two sides of S13, S14- colour filter.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment 1：
Fig. 1 is a kind of structural representation for optical lens that the specific embodiment of the invention provides.As shown in figure 1, this hair
A kind of bright described optical lens, includes successively from the object side to the image side：Front lens group, aperture member with positive light coke
L7, rear lenses group, colour filter L8 and the imaging surface L9 with positive light coke；
Wherein, the front lens group includes successively from the object side to the image side：First lens L1, the second lens L2, described
One lens L1 is with negative power and concave surface is towards the crescent lens of image space, and the second lens L2 is with positive light coke
Biconvex lens；The rear lenses group includes successively from the object side to the image side：3rd lens L3, the 4th lens L4, the 5th lens
L5 and the 6th lens L6, the 3rd lens L3 are the biconcave lens with negative power, and the 4th lens L4 is with just
Towards the crescent lens of object space, the 5th lens L5 and the 6th lens L6 form a balsaming lens for focal power and concave surface.
The 5th lens L5 in the balsaming lens is towards the crescent lens of image space, institute with negative power and concave surface
It is the biconvex lens with positive light coke to state the 6th lens L6 in balsaming lens.
In the present embodiment, the first lens L1 meets below equation：
Nd (1)≤1.65, Vd (1) >=55, -0.9 >=F1/F >=-1.8
Wherein, Nd (1) is the refractive index of the first lens L1 material, and Vd (1) is that the Abbe of the first lens L1 material is normal
Number.F1 is the first lens L1 focal length value, and F represents the whole group focal length value of the optical lens.Relatively low refractive index can avoid
Diverging by light after the first lens L1 of the light that object space comes by negative power is excessive, the relatively whole lens of the first lens L1
Group carries out focal power reasonable distribution, and the first lens L1 appearance and size and the aberration of optical lens whole system can be caused to reach
One preferably balances.
In the present embodiment, the second lens L2 meets below equation：
Nd (2) >=1.8, Vd (2) >=40
Wherein, Nd (2) is the refractive index of the second lens L2 material, and Vd (2) is that the Abbe of the second lens L2 material is normal
Number.Using the second eyeglass of high index of refraction, further realize that the light that object space comes can smoothly be transitioned into rear lenses group,
And ensureing the large aperture performance of the optical lens, Vd (2) >=40 can effectively correct the axial colour of optical lens system
Difference.
In the present embodiment, the aperture member L7 of the optical lens is between the second lens L2 and the 3rd lens L3,
The purpose so done can not only increase the aperture size of optical lens, the relative illumination performance of improving optical camera lens, Er Qieke
To reduce the bore of front lens group, be advantageous to optical lens miniaturization.
In the present embodiment, the 4th lens L4 is the crescent lens towards object space with positive light coke and concave surface.
Wherein, concave surface can reduce incident angle of the big field rays in the 4th lens L4, have towards the crescent lens arrangement of object space
Effect reduces the senior aberration of optical lens.Meanwhile the 4th lens L4 be positive power lens, by the reasonable distribution of focal power,
Can be with the aberration of balance optical camera lens, and effectively reduce the effective aperture of balsaming lens group.
In the present embodiment, the focal length value of the lens with positive light coke in the balsaming lens and the optical lens
Whole group focal length value meet below equation：
Dn/dt (just) ＜ -5*10-6/ DEG C, Vd (just) ＞ 72,1.6 >=F (just)/F >=1.2
Wherein, dn/dt (just) refers to that the refractive index of the lens with positive light coke in the balsaming lens becomes with temperature
The variable quantity of change, Vd (just) refer to the Abbe constant of the material of the lens with positive light coke in the balsaming lens, F (just)
Refer to the focal length value of the lens with positive light coke in the balsaming lens, F represents the whole group focal length value of the optical lens.
The reasonable distribution of characteristic is varied with temperature by focal power and Refractive Index of Material, when realizing temperature rise, the whole group of optical lens
Focal length increases, the optic back focal increase of optical lens；When temperature reduces, the whole group focal length of optical lens reduces, optical lens
Optic back focal reduces.So as to offset the caused optic back focal varying effect because structural member expands with heat and contract with cold so that camera lens is located all the time
In on preferable imaging surface L9, meeting that camera lens keeps the resolution of mega pixel to want within the temperature range of -40 DEG C~+85 DEG C
Ask.
In the present embodiment, the focal length of the front lens group, rear lenses group focal length and the optical lens it is whole
Group focal length value meets below equation：
2.7 >=F (preceding)/F >=1.8,2.0 >=F (rear)/F >=1.2
Wherein, (preceding) focal length values for representing front lens group of F, (rear) focal length values for representing rear lenses group of F, F represent institute
State the whole group focal length value of optical lens.By reasonably being divided front lens group, the ratio of the focal power of rear lenses group
Match somebody with somebody, on the one hand can effectively control the effective aperture of optical lens front end and the optic back focal of optical lens；On the other hand can
To effectively eliminate the senior aberration of optical lens system and distortion aberration.
The optical length and optic back focal of the optical lens meet following condition：
TTL/F≤3.5, BFL/F >=0.9
Wherein, TTL represents the optical length of the optical lens, i.e., the first lens L1 of described optical lens object space side
For outermost point to the distance of the imaging focal plane of the optical lens, BFL represents the optic back focal of the optical lens, i.e., described light
Learn the 6th lens L6 of camera lens image side outermost point and represent the light to the distance of the imaging focal plane of the optical lens, F
Learn the whole group focal length value of camera lens；
The F-number FNO of the optical lens meets below equation：
FNO≤1.8
Total angle of visual field FOV of the optical lens meets below equation：
80°≥FOV≥40°
The angle of visual field of the maximum clear aperture of first lens and corresponding imaging image height and the optical lens meets
Below equation：
D/h/FOV≤0.02
Wherein, FOV represents the maximum field of view angle of the optical lens, and D represents the first lens direction corresponding to maximum FOV
The maximum clear aperture of the curved surface of object space, h represent the imaging image height corresponding to maximum FOV.
In the present embodiment, the first lens L1 to the 6th lens L6 uses glass material, wherein, the second lens
The lens with negative power in L2, the 3rd lens L3, the 4th lens L4 and balsaming lens use the material of high index of refraction.
Fig. 2-Fig. 4 is the optical performance curve figure of the present embodiment.Wherein, Fig. 2 is the MTF solutions of optical lens in Fig. 1 as bent
Line；Fig. 3 is the astigmatism curve map of optical lens in Fig. 1, is represented by the wavelength of conventional three coloured light, unit mm；Fig. 4 is figure
The distortion curve figure of optical lens in 1, represent the distortion sizes values after normalizing in the case of the different angles of visual field, unit %.By
Fig. 2~Fig. 4 understands that having embodied the optical lens has preferable optical property.
In the present embodiment, the whole group focal length value of the optical lens is F, f-number FNO, angle of visual field FOV, and camera lens is total
A length of TTL, F=5.3mm, FNO=1.6, FOV=64 °, TTL=15.6mm.
It should be noted that the first lens L1 two sides is S1, S2, the second lens L2 two sides is S3, S4, aperture member
L7 faces are S5, and the 3rd lens L3 two sides is S6, S7, and the 4th lens L4 two sides is S8, S9, and the 5th lens L5 two sides is
S10, S11, the 6th lens L6 two sides is S11, S12, and colour filter L8 two sides is S13, S14；In the S1-S14 and following table
Face sequence number correspond, wherein, IMA represents imaging surface L9 image planes.
Following table is the parameter of the system of the optical lens of embodiment 1：
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows：
F1/F=-1.35, F (preceding)/F=2.08, F (rear)/F=1.56, TTL/F=2.96, D/h/FOV=0.014.
In embodiment 1, as one group of preferable parameter, using the optical lens of the parameter, preferable optical property can be reached.
In summary, a kind of optical lens of the present invention, by using 6 lens structures, meet it is inexpensive, small
Under the requirement condition of type, realize small high pixel, distortion, large aperture, high pass optical property and meet fine definition requirement, and effectively
Correct optical system various aberrations, while can ensure still to keep within the temperature range of -40 DEG C~+85 DEG C more perfectly into
Image sharpness, especially suitable for taking into account day and night or the poor monitoring of lighting condition and in-vehicle camera system.
Embodiment 2：It should be noted that the present embodiment and the difference of embodiment 1 are, the rear lenses group in the present embodiment
Balsaming lens structure in group is different.
Fig. 5 is the structural representation for another optical lens that the specific embodiment of the invention provides.As shown in figure 5, this
A kind of described optical lens of invention, includes successively from the object side to the image side：Front lens group, aperture member with positive light coke
L7, rear lenses group, colour filter L8 and the imaging surface L9 with positive light coke；
Wherein, the front lens group includes successively from the object side to the image side：First lens L1, the second lens L2, described
One lens L1 is with negative power and concave surface is towards the crescent lens of image space, and the second lens L2 is with positive light coke
Biconvex lens；The rear lenses group includes successively from the object side to the image side：3rd lens L3, the 4th lens L4, the 5th lens
L5 and the 6th lens L6, the 3rd lens L3 are the biconcave lens with negative power, and the 4th lens L4 is with just
Towards the crescent lens of object space, the 5th lens L5 and the 6th lens L6 form a balsaming lens for focal power and concave surface.
The 5th lens L5 in the balsaming lens is the biconvex lens with positive light coke, in the balsaming lens
Six lens L6 are the crescent lens towards object space with negative power and concave surface.
In the present embodiment, the first lens L1 meets below equation：
Nd (1)≤1.65, Vd (1) >=55, -0.9 >=F1/F >=-1.8
Wherein, Nd (1) is the refractive index of the first lens L1 material, and Vd (1) is that the Abbe of the first lens L1 material is normal
Number.F1 is the first lens L1 focal length value, and F represents the whole group focal length value of the optical lens.Relatively low refractive index can avoid
Diverging by light after the first lens L1 of the light that object space comes by negative power is excessive.The relatively whole lens of first lens L1
Group carries out focal power reasonable distribution, and the first lens L1 appearance and size and the aberration of optical lens whole system can be caused to reach
One preferably balances.
In the present embodiment, the second lens L2 meets below equation：
Nd (2) >=1.8, Vd (2) >=40
Wherein, Nd (2) is the refractive index of the second lens L2 material, and Vd (2) is that the Abbe of the second lens L2 material is normal
Number.Using the second eyeglass of high index of refraction, further realize that the light that object space comes can smoothly be transitioned into rear lenses group,
And ensureing the large aperture performance of the optical lens, Vd (2) >=40 can effectively correct the axial colour of optical lens system
Difference.
In the present embodiment, the aperture member L7 of the optical lens is between the second lens L2 and the 3rd lens L3,
The purpose so done can not only increase the aperture size of optical lens, the relative illumination performance of improving optical camera lens, Er Qieke
To reduce the bore of front lens group, be advantageous to optical lens miniaturization.
In the present embodiment, the 4th lens L4 is the crescent lens towards object space with positive light coke and concave surface.
Wherein, concave surface can reduce incident angle of the big field rays in the 4th lens L4, have towards the crescent lens arrangement of object space
Effect reduces the senior aberration of optical lens.Meanwhile the 4th lens L4 be positive power lens, by the reasonable distribution of focal power,
Can be with the aberration of balance optical camera lens, and effectively reduce the effective aperture of balsaming lens group.
In the present embodiment, the focal length value of the lens with positive light coke in the balsaming lens and the optical lens
Whole group focal length value meet below equation：
Dn/dt (just) ＜ -5*10-6/ DEG C, Vd (just) ＞ 72,1.6 >=F (just)/F >=1.2
Wherein, dn/dt (just) refers to that the refractive index of the lens with positive light coke in the balsaming lens becomes with temperature
The variable quantity of change, Vd (just) refer to the Abbe constant of the material of the lens with positive light coke in the balsaming lens, F (just)
Refer to the focal length value of the lens with positive light coke in the balsaming lens, F represents the whole group focal length value of the optical lens.
The reasonable distribution of characteristic is varied with temperature by focal power and Refractive Index of Material, when realizing temperature rise, the whole group of optical lens
Focal length increases, the optic back focal increase of optical lens；When temperature reduces, the whole group focal length of optical lens reduces, optical lens
Optic back focal reduces.So as to offset the caused optic back focal varying effect because structural member expands with heat and contract with cold so that camera lens is located all the time
In on preferable imaging surface L9, meeting that camera lens keeps the resolution of mega pixel to want within the temperature range of -40 DEG C~+85 DEG C
Ask.
In the present embodiment, the focal length of the front lens group, rear lenses group focal length and the optical lens it is whole
Group focal length value meets below equation：
2.7 >=F (preceding)/F >=1.8,2.0 >=F (rear)/F >=1.2
Wherein, (preceding) focal length values for representing front lens group of F, (rear) focal length values for representing rear lenses group of F, F represent institute
State the whole group focal length value of optical lens.By reasonably being divided front lens group, the ratio of the focal power of rear lenses group
Match somebody with somebody, on the one hand can effectively control the effective aperture of optical lens front end and the optic back focal of optical lens；On the other hand can
To effectively eliminate the senior aberration of optical lens system and distortion aberration.
The optical length and optic back focal of the optical lens meet following condition：
TTL/F≤3.5, BFL/F >=0.9
Wherein, TTL represents the optical length of the optical lens, i.e., the first lens L1 of described optical lens object space side
For outermost point to the distance of the imaging focal plane of the optical lens, BFL represents the optic back focal of the optical lens, i.e., described light
Learn the 6th lens L6 of camera lens image side outermost point and represent the light to the distance of the imaging focal plane of the optical lens, F
Learn the whole group focal length value of camera lens；
The F-number FNO of the optical lens meets below equation：
FNO≤1.8
Total angle of visual field FOV of the optical lens meets below equation：
80°≥FOV≥40°
The angle of visual field of the maximum clear aperture of first lens and corresponding imaging image height and the optical lens meets
Below equation：
D/h/FOV≤0.02
Wherein, FOV represents the maximum field of view angle of the optical lens, and D represents the first lens direction corresponding to maximum FOV
The maximum clear aperture of the curved surface of object space, h represent the imaging image height corresponding to maximum FOV.
In the present embodiment, the first lens L1 to the 6th lens L6 uses glass material, wherein, the second lens
The lens with negative power in L2, the 3rd lens L3, the 4th lens L4 and balsaming lens use the material of high index of refraction.
Fig. 6-Fig. 8 is the optical performance curve figure of the present embodiment.Wherein, Fig. 6 is the MTF solutions of optical lens in Fig. 5 as bent
Line；Fig. 7 is the astigmatism curve map of optical lens in Fig. 5, is represented by the wavelength of conventional three coloured light, unit mm；Fig. 8 is figure
The distortion curve figure of optical lens in 5, represent the distortion sizes values after normalizing in the case of the different angles of visual field, unit %.By
Fig. 6~Fig. 8 understands that having embodied the camera lens has preferable optical property.
In the present embodiment, the whole group focal length value of the optical lens is F, f-number FNO, angle of visual field FOV, and camera lens is total
A length of TTL, F=5.3mm, FNO=1.6, FOV=64 °, TTL=15.8mm.
It should be noted that the first lens L1 two sides is S1, S2, the second lens L2 two sides is S3, S4, aperture member
L7 faces are S5, and the 3rd lens L3 two sides is S6, S7, and the 4th lens L4 two sides is S8, S9, and the 5th lens L5 two sides is
S10, S11, the 6th lens L6 two sides is S11, S12, and colour filter L8 two sides is S13, S14；In the S1-S14 and following table
Face sequence number correspond, wherein, IMA represents imaging surface L9 image planes.
Following table is the parameter of the system of the optical lens of embodiment 2：
According to above-mentioned data, the numerical value for calculating formula involved in the present embodiment is as follows：
F1/F=-1.43, F (preceding)/F=2.21, F (rear)/F=1.48, TTL/F=2.97, D/h/FOV=0.014.
In embodiment 2, as one group of preferable parameter, using the optical lens of the parameter, preferable optical property can be reached.
In summary, a kind of optical lens of the present invention, by using 6 lens structures, meet it is inexpensive, small
Under the requirement condition of type, realize small high pixel, distortion, large aperture, high pass optical property and meet fine definition requirement, and effectively
Correct optical system various aberrations, while can ensure still to keep within the temperature range of -40 DEG C~+85 DEG C more perfectly into
Image sharpness, especially suitable for taking into account day and night or the poor monitoring of lighting condition and in-vehicle camera system.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of optical lens, it is characterised in that include successively from the object side to the image side：Front lens group with positive light coke,
Aperture member, the rear lenses group with positive light coke；
Wherein, the front lens group includes successively from the object side to the image side：First lens, the second lens, first lens are
With negative power and concave surface is towards the crescent lens of image space, and second lens are the biconvex lens with positive light coke；
The rear lenses group includes successively from the object side to the image side：3rd lens, the 4th lens, the 5th lens and the 6th lens, it is described
3rd lens are the biconcave lens with negative power, and the 4th lens are the moon towards object space with positive light coke and concave surface
Thread form lens, the 5th lens and the 6th lens form a balsaming lens；
Wherein, the lens with positive light coke in the balsaming lens meet following condition：
Vd (just) ＞ 72, and dn/dt (just) ＜ -5*10-6/℃
Wherein, Vd (just) refers to the Abbe constant of the material of the lens with positive light coke in the balsaming lens, dn/dt
(just) variable quantity that the refractive index of the lens with positive light coke in the balsaming lens varies with temperature is referred to.
2. a kind of optical lens according to claim 1, it is characterised in that the 5th lens in the balsaming lens are tool
There is negative power and concave surface is towards the crescent lens of image space, the 6th lens in the balsaming lens are with positive light coke
Biconvex lens.
3. a kind of optical lens according to claim 1, it is characterised in that the 5th lens in the balsaming lens are tool
There is a biconvex lens of positive light coke, the 6th lens in the balsaming lens are the moon towards object space with negative power and concave surface
Thread form lens.
4. a kind of optical lens according to claim 1, it is characterised in that there is positive light coke in the balsaming lens
The focal length value of lens and the whole group focal length value of the optical lens meet below equation：
1.6 >=F (just)/F >=1.2
Wherein, F (just) refers to the focal length value of the lens with positive light coke in the balsaming lens, and F represents the optical frames
The whole group focal length value of head.
5. a kind of optical lens according to claim 1, it is characterised in that first lens meet below equation：
Nd (1)≤1.65, Vd (1) >=55, -0.9 >=F1/F >=-1.8
Wherein, Nd (1) is the refractive index of the material of the first lens, and Vd (1) is the Abbe constant of the material of the first lens, and F1 is
The focal length value of one lens, F are the whole group focal length values of the optical lens.
6. a kind of optical lens according to claim 1, it is characterised in that second lens meet below equation：
Nd (2) >=1.8, Vd (2) >=40
Wherein, Nd (2) is the refractive index of the material of the second lens, and Vd (2) is the Abbe constant of the material of the second lens.
7. a kind of optical lens according to claim 1, it is characterised in that focal length, the rear lenses of the front lens group
The whole group focal length value of the focal length of group and the optical lens meets below equation：
2.7 >=F (preceding)/F >=1.8,2.0 >=F (rear)/F >=1.2
Wherein, (preceding) focal length values for representing front lens group of F, (rear) focal length values for representing rear lenses group of F, F represent the light
Learn the whole group focal length value of camera lens.
8. a kind of optical lens according to claim 1, it is characterised in that the optical length and optics of the optical lens
Jiao meets following condition afterwards：
TTL/F≤3.5, BFL/F >=0.9
Wherein, TTL represents the optical length of the optical lens, i.e., the object space side outermost point of the first lens of described optical lens
To the distance of the imaging focal plane of the optical lens, BFL represents the optic back focal of the optical lens, i.e., described optical lens
The 6th lens image side outermost point to the optical lens imaging focal plane distance, F represents the optical lens
Whole group focal length value.
9. a kind of optical lens according to claim 1, it is characterised in that the F-number FNO of the optical lens meets
Below equation：
FNO≤1.8
Total angle of visual field FOV of the optical lens meets below equation：
80°≥FOV≥40°
The angle of visual field of the maximum clear aperture of first lens and corresponding imaging image height and the optical lens meets following
Formula：
D/h/FOV≤0.02
Wherein, FOV represents the maximum field of view angle of the optical lens, and D represents the first lens corresponding to maximum FOV towards object space
Curved surface maximum clear aperture, h represents the imaging image height corresponding to maximum FOV.
10. a kind of optical lens according to claim 1, it is characterised in that first lens to the 6th lens are adopted
With glass material, wherein, the lens with negative power in the second lens, the 3rd lens, the 4th lens and balsaming lens are equal
Using the material of high index of refraction.
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| CN106610518B (en) * | 2015-10-23 | 2019-02-15 | 大立光电股份有限公司 | Image capture lens group, image-taking device and electronic device |
| CN108508572B (en) * | 2017-02-28 | 2020-10-30 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN107065140B (en) * | 2017-05-04 | 2022-07-15 | 威海嘉瑞光电科技股份有限公司 | Intelligent vehicle-mounted high-pixel wide-angle lens |
| CN107065153B (en) * | 2017-05-26 | 2023-05-16 | 东莞市宇瞳光学科技股份有限公司 | Visual lens of wide-angle high-definition machine |
| CN107678147B (en) | 2017-09-19 | 2019-09-17 | 浙江大华技术股份有限公司 | A kind of lens system, fish eye lens and image collecting device |
| CN107422463B (en) * | 2017-09-25 | 2022-07-15 | 河南翊轩光电科技有限公司 | Confocal optical system of clear day night of long burnt superelevation |
| CN109752836B (en) * | 2017-11-01 | 2023-11-14 | 湖南长步道光电科技股份有限公司 | Lens system for detecting 360-degree inner wall with small caliber |
| CN108051899A (en) * | 2017-12-27 | 2018-05-18 | 江西联创电子有限公司 | Pick-up lens |
| CN110376709A (en) * | 2018-04-13 | 2019-10-25 | 甘肃智呈网络科技有限公司 | A kind of fixed-focus imaging lens |
| CN109239892B (en) * | 2018-11-21 | 2023-06-06 | 福建福光股份有限公司 | Fixed-magnification optical image detection system and imaging method thereof |
| CN109782418B (en) * | 2019-03-21 | 2024-04-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN110927934B (en) * | 2019-12-24 | 2023-05-26 | 协益电子（苏州）有限公司 | Vehicle-mounted active safety front view mirror |
| CN113589495B (en) * | 2021-09-30 | 2022-01-04 | 常州联益光学有限公司 | External lens |
| CN114236789B (en) * | 2021-12-14 | 2023-06-16 | 南阳利达光电有限公司 | High-definition micro-projection lens |
| CN116027520B (en) * | 2023-03-30 | 2023-06-20 | 深圳市东正光学技术股份有限公司 | Optical imaging system and optical imaging apparatus |
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| KR0138743B1 (en) * | 1992-10-28 | 1998-05-15 | 윤종용 | Projection lenses for rear type projection television |
| CN201302618Y (en) * | 2008-08-21 | 2009-09-02 | 富士能株式会社 | Camera lens and camera device |
| JP5462466B2 (en) * | 2008-10-29 | 2014-04-02 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| CN103048773B (en) * | 2012-12-03 | 2016-02-24 | 宁波舜宇车载光学技术有限公司 | A kind of optical lens that there is rear Jiao and compensate |
| CN204229036U (en) * | 2014-12-05 | 2015-03-25 | 宁波舜宇车载光学技术有限公司 | A kind of optical lens |
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