CN208888458U - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN208888458U CN208888458U CN201821785718.6U CN201821785718U CN208888458U CN 208888458 U CN208888458 U CN 208888458U CN 201821785718 U CN201821785718 U CN 201821785718U CN 208888458 U CN208888458 U CN 208888458U
- Authority
- CN
- China
- Prior art keywords
- lens
- wide
- angle
- angle lens
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
The utility model relates to a kind of wide-angle lens, comprising: the first lens, the second lens, the third lens, the 4th lens and the 5th lens being arranged successively along optical axis from object side to image side；It further include diaphragm；First lens are the male-female lens with negative power；Second lens are the concave-convex lens with positive light coke；The third lens are the biconvex lens with positive light coke；4th lens are the biconcave lens with negative power；5th lens are the biconvex lens with positive light coke；4th lens and the 5th lens constitute cemented doublet group；Meet relational expression: 4.0 < TTL/f < 5.60 between the optics overall length TTL of the wide-angle lens and the effective focal length f of the wide-angle lens.Wide-angle lens according to the present utility model is at low cost, has high-resolution and wide temperature range.
Description
Technical field
The utility model relates to a kind of optical lens more particularly to a kind of glass modeling mixing wide-angle lens.
Background technique
Wide-angle lens has biggish field angle and a biggish coverage as a kind of short-focus lens, thus its
The fields such as security protection, vehicle-mounted have extensive use.
However wide-angle lens will make it all have preferable imaging in entire field range since its field angle is bigger
Quality generally realizes that often cost can compare in this way in order to reach higher image quality by increasing the modes such as number of lenses
Higher, camera lens volume can also compare larger, and existing wide-angle lens generally uses the structural shape of 4G2P, camera lens weight weight, light
It is longer to learn overall length, it is difficult to meet miniature requirement.Although although and the part prior art using 3G2P cost have certain reduction,
But the resolving power of entire camera lens can only achieve mega pixel, much be unable to satisfy the demand to high image quality.It is supervised simultaneously for security protection
For control and on-vehicle lens, since the environment that it is used is more severe, so, it can be in wide temperature range for such camera lens
Good image quality is kept to be very important.
Summary of the invention
One purpose of the utility model is to solve the above problems, and provides a kind of high-resolution and has wide temperature model
The glass modeling mixing wide-angle lens enclosed.
For achieving the above object, the utility model provides a kind of wide-angle lens, comprising: along optical axis from object side to image side
The first lens, the second lens, the third lens, the 4th lens and the 5th lens being arranged successively；
It further include diaphragm；
First lens are the male-female lens with negative power；
Second lens are the concave-convex lens with positive light coke；
The third lens are the biconvex lens with positive light coke；
4th lens are the biconcave lens with negative power；
5th lens are the biconvex lens with positive light coke；
4th lens and the 5th lens constitute cemented doublet group；
Meet relational expression between the optics overall length TTL of the wide-angle lens and the effective focal length f of the wide-angle lens: 4.0
< TTL/f < 5.60.
One aspect according to the present utility model, second lens, the 4th lens and the 5th lens are modeling
Expect non-spherical lens；
First lens and the third lens are glass spherical lens.
One aspect according to the present utility model, the diaphragm is between second lens and the third lens.
One aspect according to the present utility model, half image height h of the wide-angle lens and effective coke of the wide-angle lens
Away from meeting relational expression between f: h/f > 0.75.
One aspect according to the present utility model, the focal length f2 of the focal length f1 of first lens and second lens it
Between meet relational expression: 0.4 < | f1/f2 | < 0.7.
One aspect according to the present utility model, the focal length f3 of the third lens and the effective focal length of the wide-angle lens
Meet relational expression: 1.40 < between f | f3/f | < 2.0.
One aspect according to the present utility model, the refraction of the refractive index nd4 and the 5th lens of the 4th lens
Rate nd5 meets respectively: 1.50 < nd4 <, 1.70,1.40 < nd5 < 1.60；
The Abbe number vd4 of 4th lens and the Abbe number vd5 of the 5th lens meet respectively: 40 > vd4, vd5
> 50.
One aspect according to the present utility model, the operating temperature range of the wide-angle lens are as follows: -40 DEG C~85 DEG C.
One aspect according to the present utility model, the focal power Bf of the cemented doublet group are effective with the wide-angle lens
Meet relational expression: 1.80 < between focal length f | Bf/f | < 2.30.
One aspect according to the present utility model, the optic back focal BFL of the wide-angle lens and the light of the wide-angle lens
It learns and meets relational expression: 3.50 < TTL/BFL < 4.95 between overall length TTL.
A scheme according to the present utility model, the wide-angle lens of the utility model can realize the large aperture of F1.8；120°
Big field angle；The utility model also has good temperature compensation function, can be in -40 DEG C~85 DEG C of range of temperature
Inside not empty coke guarantees that the cost of system system while image quality with higher is lower using the optical texture of 2G3P；
Meet relational expression: 4.0 < between the optics overall length TTL of the wide-angle lens of the utility model and the effective focal length f of wide-angle lens
TTL/f < 5.60, volume is smaller, and field angle is bigger.
A scheme according to the present utility model, it is full between half image height h of wide-angle lens and the effective focal length f of wide-angle lens
Sufficient relational expression: h/f > 0.75.It can guarantee that wide-angle lens has biggish imaging viewing field angle in this way, can reach FOV >=80 °.
A scheme according to the present utility model, meets between the focal length f1 of the first lens 1 and the focal length f2 of the second lens 2
Relational expression: 0.4 < | f1/f2 | < 0.7.It can guarantee that system has the lesser curvature of field and astigmatism in big visual field in this way, effectively
Guarantee that preferable imaging effect may be implemented in outer visual field.
A scheme according to the present utility model, it is full between the focal length f3 of the third lens 3 and the effective focal length f of wide-angle lens
Sufficient relational expression: 1.40 < | f3/f | < 2.0.Be conducive to make on axis and outside axis on axis with the optimization and balance of off-axis aberration in this way
Visual field can reach higher image quality.
A scheme according to the present utility model, the refractive index nd4 of the 4th lens 4 and the refractive index nd5 of the 5th lens 5 divide
Not Man Zu: 1.50 < nd4 <, 1.70,1.40 < nd5 < 1.60.The Abbe number vd4 of 4th lens 4 and the Abbe of the 5th lens 5
Number vd5 meets respectively: 40 > vd4, vd5 > 50.Above-mentioned refractive index and Abbe number model are pressed by the 4th lens 4 and the 5th lens 5
It encloses and arranges in pairs or groups, be conducive to system compensation color difference, realize high-resolution.
A scheme according to the present utility model, the second lens 2, the 4th lens 4 and the 5th lens 5 are that plastic aspherical element is saturating
Mirror；First lens 1 and the third lens 3 are glass spherical lens.By using being used cooperatively for glass lens and plastic lens, no
The overall length of camera lens is only effectively reduced, cost is reduced, mitigates weight, and because two class materials have mutual compensating action, is effectively solved
The problem of camera lens resolving power determined with temperature drift all has good solution picture in -40 DEG C~85 DEG C of range of temperature
Power, not empty coke.
The effective focal length f of a scheme according to the present utility model, the focal power Bf of cemented doublet group and wide-angle lens it
Between meet relational expression: 1.80 < | Bf/f | < 2.30.It can ensure that wide-angle lens is realizing big visual field, high picture when meeting above-mentioned condition
There is preferable tolerance and lesser optics overall length while plain.
A scheme according to the present utility model, the optic back focal BFL of wide-angle lens and the optics overall length TTL of wide-angle lens
Between meet relational expression: 3.50 < TTL/BFL < 4.95.Wide-angle lens optics overall length and wide-angle lens optic back focal meet above-mentioned
Proportionate relationship keeps the optics overall length of system smaller, and tolerance sensitivities are smaller.
Wide-angle lens according to the present utility model is combined using 2 glass spheric glasses and 3 plastic aspherical element eyeglasses
2G3P optical texture, so that the utility model wide-angle lens is can reach the big field angle of FOV >=80 ° and with FNO≤2.8
Large aperture while guaranteeing that wide-angle lens according to the present utility model has big visual field, high-resolution, has relatively high picture
Face brightness.
The utility model efficiently solves camera lens by the combination of glass and plastic lens and the matching of each lens material
The problem of resolving power is with temperature drift, being capable of not empty coke, realization temperature-compensating in -40 DEG C~85 DEG C of range of temperature.
The utility model by the optical texture of 2G3P so that the utility model have while guaranteeing performance it is lower
Cost；The use of plastic aspherical element eyeglass also effectively reduces the length of the utility model wide-angle lens simultaneously, so that wide-angle
Camera lens small in volume.
Detailed description of the invention
Fig. 1 schematically shows the structural plan of the wide-angle lens of embodiment 1 according to the present utility model；
Fig. 2 is MTF figure of the wide-angle lens described in specific embodiment 1 under 20 degree of room temperature, visible light；
Fig. 3 is the Through- of the 125lp/mm under 20 degree of room temperature, visible light of wide-angle lens described in specific embodiment 1
Focus-MTF figure；
Fig. 4 is the Through- of the 125lp/mm under the degree of low temperature -40, visible light of wide-angle lens described in specific embodiment 1
Focus-MTF figure；
Fig. 5 is the Through- of the 125lp/mm under 80 degree of high temperature, visible light of wide-angle lens described in specific embodiment 1
Focus-MTF figure；
Fig. 6 schematically shows the structural plan of the wide-angle lens of embodiment 2 according to the present utility model；
Fig. 7 is MTF figure of the wide-angle lens described in specific embodiment 2 under 20 degree of room temperature, visible light；
Fig. 8 is the Through- of the 125lp/mm under 20 degree of room temperature, visible light of wide-angle lens described in specific embodiment 2
Focus-MTF figure；
Fig. 9 is the Through- of the 125lp/mm under the degree of low temperature -40, visible light of wide-angle lens described in specific embodiment 2
Focus-MTF figure；
Figure 10 is the Through- of the 125lp/mm under 80 degree of high temperature, visible light of wide-angle lens described in specific embodiment 2
Focus-MTF figure；
Figure 11 schematically shows the structural plan of the wide-angle lens of embodiment 3 according to the present utility model；
Figure 12 is MTF figure of the wide-angle lens described in specific embodiment 3 under 20 degree of room temperature, visible light；
Figure 13 is the Through- of the 125lp/mm under 20 degree of room temperature, visible light of wide-angle lens described in specific embodiment 3
Focus-MTF figure；
Figure 14 is the Through- of the 125lp/mm under the degree of low temperature -40, visible light of wide-angle lens described in specific embodiment 3
Focus-MTF figure；
Figure 15 is the Through- of the 125lp/mm under 80 degree of high temperature, visible light of wide-angle lens described in specific embodiment 3
Focus-MTF figure；
Figure 16 schematically shows the structural plan of the wide-angle lens of embodiment 4 according to the present utility model；
Figure 17 is MTF figure of the wide-angle lens described in specific embodiment 4 under 20 degree of room temperature, visible light；
Figure 18 is the Through- of the 125lp/mm under 20 degree of room temperature, visible light of wide-angle lens described in specific embodiment 4
Focus-MTF figure；
Figure 19 is the Through- of the 125lp/mm under the degree of low temperature -40, visible light of wide-angle lens described in specific embodiment 4
Focus-MTF figure；
Figure 20 is the Through- of the 125lp/mm under 80 degree of high temperature, visible light of wide-angle lens described in specific embodiment 4
Focus-MTF figure.
Specific embodiment
It, below will be to implementation in order to illustrate more clearly of the utility model embodiment or technical solution in the prior art
Attached drawing needed in mode is briefly described.It should be evident that the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skills without creative efforts, can be with
It obtains other drawings based on these drawings.
When being described for the embodiments of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower",
"front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", orientation or positional relationship is expressed by "outside"
Based on orientation or positional relationship shown in relevant drawings, it is merely for convenience of describing the present invention and simplifying the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore on
Stating term should not be understood as limiting the present invention.
The utility model is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot herein one
One repeats, but therefore the embodiments of the present invention is not defined in following implementation.
The utility model provides a kind of wide-angle lens, wide-angle lens according to the present utility model include along optical axis from object side to
The first lens 1, the second lens 2, the third lens 3, the 4th lens 4 and the 5th lens 5 that image side is arranged successively.It further include diaphragm S,
Diaphragm S is between the second lens 2 and the third lens 3.Wherein, the first lens 1 are the male-female lens with negative power；The
Two lens 2 are the concave-convex lens with positive light coke；The third lens 3 are the biconvex lens with positive light coke；4th lens 4
For the biconcave lens with negative power；5th lens 5 are the biconvex lens with positive light coke；4th lens 4 and described
Five lens 5 constitute cemented doublet group；Second lens 2, the 4th lens 4 and the 5th lens 5 are plastic aspheric lens；First lens
1 and the third lens 3 be glass spherical lens.
The structure of above-mentioned wide-angle lens according to the present utility model arranges the large aperture, it can be achieved that F1.8；120 ° of big view
Rink corner；The utility model also has good temperature compensation function, can be not empty in -40 DEG C~85 DEG C of range of temperature
Coke guarantees that the cost of system system while image quality with higher is lower using the optical texture of 2G3P；Wide-angle lens
Meet relational expression between the optics overall length TTL of head and the effective focal length f of wide-angle lens: 4.0 < TTL/f < 5.60, volume is smaller,
Field angle is bigger.Also, providing cemented doublet group in camera lens and mutually abutting relative to two traditional lens has reduction sensitive
Degree improves stability, prevents the advantage of secondary reflection.
In the present invention, meet relational expression between half image height h of wide-angle lens and the effective focal length f of wide-angle lens:
H/f > 0.75.It can guarantee that wide-angle lens has biggish imaging viewing field angle in this way, can reach FOV >=80 °；
In the present invention, meet relational expression between the focal length f1 of the first lens 1 and the focal length f2 of the second lens 2: 0.4
< | f1/f2 | < 0.7.It can guarantee that system has the lesser curvature of field and astigmatism in big visual field in this way, outer visual field is effectively ensured
Preferable imaging effect may be implemented.
In the present invention, meet relational expression between the focal length f3 of the third lens 3 and the effective focal length f of wide-angle lens:
1.40 < | f3/f | < 2.0.Be conducive to make on axis with the optimization and balance of off-axis aberration on axis and the outer visual field of axis is reachable in this way
To higher image quality.
In the present invention, the refractive index nd4 of the 4th lens 4 and the refractive index nd5 of the 5th lens 5 meet respectively:
1.50 < nd4 <, 1.70,1.40 < nd5 < 1.60.The Abbe number vd4 of 4th lens 4 and the Abbe number vd5 of the 5th lens 5 divide
Not Man Zu: 40 > vd4, vd5 > 50.It is taken by the 4th lens 4 and the 5th lens 5 by above-mentioned refractive index and Abbe number range
Match, be conducive to system compensation color difference, realizes high-resolution.
In the present invention, the second lens 2, the 4th lens 4 and the 5th lens 5 are plastic aspheric lens；First thoroughly
Mirror 1 and the third lens 3 are glass spherical lens.By using being used cooperatively for glass lens and plastic lens, not only effectively subtract
The small overall length of camera lens reduces cost, mitigates weight, and because two class materials have mutual compensating action, efficiently solves camera lens
The problem of resolving power is with temperature drift all has good resolving power in -40 DEG C~85 DEG C of range of temperature, not empty
It is burnt.
In the present invention, meet relationship between the focal power Bf of cemented doublet group and the effective focal length f of wide-angle lens
Formula: 1.80 < | Bf/f | < 2.30.It can ensure that wide-angle lens tool while realizing big visual field, high pixel when meeting above-mentioned condition
There are preferable tolerance and lesser optics overall length.
In the present invention, meet between the optic back focal BFL of wide-angle lens and the optics overall length TTL of wide-angle lens and close
It is formula: 3.50 < TTL/BFL < 4.95.Wide-angle lens optics overall length and wide-angle lens optic back focal meet aforementioned proportion relationship,
Keep the optics overall length of system smaller, tolerance sensitivities are smaller.
Above-mentioned setting below according to the utility model provides four groups of specific embodiments and illustrates according to this is practical
Novel wide-angle lens.Because wide-angle lens according to the present utility model shares five lens, wherein the 4th lens 4 and the 5th are saturating
Mirror 5 constitutes cemented doublet group, so five lens share 9 faces, along with diaphragm S, the imaging surface IMA and imaging surface of camera lens
4 faces of plate filter IR between IMA and lens, altogether 13 faces.This 13 faces according to the utility model structural order
It is arranged successively arrangement, for the ease of narration explanation, 13 faces are numbered as S1 to S13.In addition, in the following embodiments, it is non-
Spherical lens meets following formula:
R is the distance that optical axis is a little arrived on optical surface in formula, and z is rise of this along optical axis direction, and c is the surface
Curvature, k are the quadratic surface constant on the surface, and A, B, C, D, E, F, G are respectively quadravalence, six ranks, eight ranks, ten ranks, ten second orders, ten
The asphericity coefficient of quadravalence and 16 ranks.
Data in four groups of embodiment data such as the following table 1:
| Conditional | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| 4.0<TTL/f<5.60 | 5.522 | 4.275 | 5.276 | 5.522 |
| h/f>0.75 | 1.125 | 0.802 | 1.01 | 1.125 |
| FNO≤2.80 | 2.8 | 1.8 | 1.8 | 1.8 |
| 0.4<∣f1/f2∣<0.7 | 0.446 | 0.604 | 0.55 | 0.446 |
| 1.40<∣f3/f∣<2.0 | 1.767 | 1.499 | 1.899 | 1.767 |
| 1.80<∣Bf/f∣<2.3 | 2.095 | 1.915 | 2.183 | 2.095 |
| 1.50<nd4<1.70 | 1.64 | 1.63 | 1.64 | 1.64 |
| 40>vd4 | 24.0 | 22.4 | 23.5 | 24.0 |
| 1.40<nd5<1.60 | 1.54 | 1.53 | 1.53 | 1.54 |
| vd5>50 | 56.0 | 55.8 | 56.1 | 56.0 |
| 3.50<TTL/BFL<4.95 | 4.222 | 3.803 | 4.792 | 4.222 |
Table 1
Embodiment 1:
Fig. 1 schematically shows the structural plan of the wide-angle lens of embodiment 1 according to the present utility model.
According to the data that embodiment 1 provides in table 1, each parameter in the wide-angle lens of present embodiment is as follows:
FNO=2.8；TTL/BFL=4.222；H/f=1.125；FOV=120 °.
Following table 2 lists the relevant parameter of each lens of present embodiment, including surface type, radius of curvature, thickness, material
The refractive index and Abbe number and circular cone coefficient of material:
Table 2
In the present embodiment, aspherical surface data is as shown in table 3 below:
Table 3
Fig. 2-Fig. 5 schematically shows MTF of the wide-angle lens in present embodiment under 20 degree of room temperature, visible light respectively
Figure；The Through Focus MTF figure of 125lp/mm under 20 degree of room temperature, visible light；Under the degree of low temperature -40, visible light
The Through-Focus-MTF of 125lp/mm schemes；The Through-Focus-MTF of 125lp/mm under 80 degree of high temperature, visible light
Figure.
As shown in Figures 2 to 5, condition of the wide-angle lens of first embodiment according to the present utility model in FNO=2.0
Under, high-resolution is realized, and taken into account the characteristic of not empty coke in day and night confocal and -40 DEG C to 80 DEG C temperature ranges, simultaneously
Resolving power is improved, the use scope of product is expanded.
Specifically, as seen from Figure 2, the space wide-angle lens according to the present utility model its central vision 200LP/mm frequency
The corresponding MTF numerical value of rate is 0.55 or more, and the corresponding MTF numerical value of outer visual field 200LP/mm spatial frequency is 0.2 or more；Thus may be used
Know, the camera lens of present embodiment realizes high-resolution characteristic.
Wide-angle lens by the utility model it can be seen from Fig. 3, Fig. 4 and Fig. 5 in -40 DEG C to 85 DEG C temperature ranges, from
Coke amount is no more than 0.0065mm. it follows that the camera lens of present embodiment realizes within the temperature range of -40 DEG C to 85 DEG C
The characteristic of not empty coke.
Embodiment 2:
Fig. 6 schematically shows the structural plan of the wide-angle lens of embodiment 2 according to the present utility model.
According to the data that embodiment 2 provides in table 1, each parameter in the wide-angle lens of present embodiment is as follows:
FNO=1.8；TTL/BFL=3.803；H/f=0.802；FOV=80 °.
Following table 4 lists the relevant parameter of each lens of present embodiment, including surface type, radius of curvature, thickness, material
The refractive index and Abbe number and circular cone coefficient of material:
Table 4
In the present embodiment, aspherical surface data is as shown in table 5 below:
Table 5
Fig. 7-Figure 10 schematically shows MTF of the wide-angle lens in present embodiment under 20 degree of room temperature, visible light respectively
Figure；The Through Focus MTF figure of 125lp/mm under 20 degree of room temperature, visible light；Under the degree of low temperature -40, visible light
The Through-Focus-MTF of 125lp/mm schemes；The Through-Focus-MTF of 125lp/mm under 80 degree of high temperature, visible light
Figure.
As shown in Figure 7 to 10, item of the wide-angle lens of first embodiment according to the present utility model in FNO=2.0
Under part, high-resolution is realized, and has taken into account the characteristic of not empty coke in day and night confocal and -40 DEG C to 80 DEG C temperature ranges, together
When improve resolving power, expand the use scope of product.
Specifically, as seen from Figure 7, the space light microscopic head its central vision 200LP/mm according to the present utility model frequency
The corresponding MTF numerical value of rate is 0.6 or more, and the corresponding MTF numerical value of outer visual field 200LP/mm spatial frequency is 0.3 or more；Thus may be used
Know, the camera lens of present embodiment realizes high-resolution characteristic.
Wide-angle lens by the utility model it can be seen from Fig. 8, Fig. 9 and Figure 10 in -40 DEG C to 85 DEG C temperature ranges,
Defocusing amount is no more than 0.006mm. it follows that the camera lens of present embodiment realizes the temperature range at -40 DEG C to 85 DEG C
The inside characteristic of not empty coke.
Embodiment 3:
Figure 11 schematically shows the structural plan of the wide-angle lens of embodiment 3 according to the present utility model.
According to the data that embodiment 3 provides in table 1, each parameter in the wide-angle lens of present embodiment is as follows:
FNO=1.8；TTL/BFL=4.792；H/f=1.01；FOV=110 °.
Following table 6 lists the relevant parameter of each lens of present embodiment, including surface type, radius of curvature, thickness, material
The refractive index and Abbe number and circular cone coefficient of material:
Table 6
In the present embodiment, aspherical surface data is as shown in table 7 below:
Table 7
Figure 12-Figure 15 schematically shows MTF of the wide-angle lens in present embodiment under 20 degree of room temperature, visible light respectively
Figure；The Through Focus MTF figure of 125lp/mm under 20 degree of room temperature, visible light；Under the degree of low temperature -40, visible light
The Through-Focus-MTF of 125lp/mm schemes；The Through-Focus-MTF of 125lp/mm under 80 degree of high temperature, visible light
Figure.
As shown in Figure 12 to Figure 15, the item of the wide-angle lens of first embodiment according to the present utility model in FNO=2.0
Under part, high-resolution is realized, and has taken into account the characteristic of not empty coke in day and night confocal and -40 DEG C to 80 DEG C temperature ranges, together
When improve resolving power, expand the use scope of product.
Specifically, as seen from Figure 12, the space light microscopic head its central vision 200LP/mm according to the present utility model
The corresponding MTF numerical value of frequency is 0.6 or more, and the corresponding MTF numerical value of outer visual field 200LP/mm spatial frequency is 0.25 or more；Thus
It is found that the camera lens of present embodiment realizes high-resolution characteristic.
The wide-angle lens of the utility model is in -40 DEG C to 85 DEG C temperature ranges it can be seen from Figure 13, Figure 14 and Figure 15
Interior, defocusing amount is no more than 0.0065mm. it follows that the camera lens of present embodiment realizes the temperature at -40 DEG C to 85 DEG C
The characteristic of not empty coke in range.
Embodiment 4:
Figure 16 schematically shows the structural plan of the wide-angle lens of embodiment 4 according to the present utility model.
According to the data that embodiment 4 provides in table 1, each parameter in the wide-angle lens of present embodiment is as follows:
FNO=1.8；TTL/BFL=4.222；H/f=1.125；FOV=120 °.
Following table 8 lists the relevant parameter of each lens of present embodiment, including surface type, radius of curvature, thickness, material
The refractive index and Abbe number and circular cone coefficient of material:
Table 8
In the present embodiment, aspherical surface data is as shown in table 9 below:
Table 9
Figure 17-Figure 20 schematically shows MTF of the wide-angle lens in present embodiment under 20 degree of room temperature, visible light respectively
Figure；The Through Focus MTF figure of 125lp/mm under 20 degree of room temperature, visible light；Under the degree of low temperature -40, visible light
The Through-Focus-MTF of 125lp/mm schemes；The Through-Focus-MTF of 125lp/mm under 80 degree of high temperature, visible light
Figure.
As shown in Figure 17 to Figure 20, the item of the wide-angle lens of first embodiment according to the present utility model in FNO=2.0
Under part, high-resolution is realized, and has taken into account the characteristic of not empty coke in day and night confocal and -40 DEG C to 80 DEG C temperature ranges, together
When improve resolving power, expand the use scope of product.
Specifically, as seen from Figure 17, the space light microscopic head its central vision 200LP/mm according to the present utility model
The corresponding MTF numerical value of frequency is 0.6 or more, and the corresponding MTF numerical value of outer visual field 200LP/mm spatial frequency is 0.3 or more；Thus
It is found that the camera lens of present embodiment realizes high-resolution characteristic.
The wide-angle lens of the utility model is in -40 DEG C to 85 DEG C temperature ranges it can be seen from Figure 18, Figure 19 and Figure 20
Interior, defocusing amount is no more than 0.006mm. it follows that the camera lens of present embodiment realizes the temperature model at -40 DEG C to 85 DEG C
The characteristic of not empty coke in enclosing.
Above embodiment according to the present utility model, the utility model are non-using 2 glass spheric glasses and 3 plastics
The optical texture for the 2G3P that spheric glass combines, make the utility model wide-angle lens can reach FOV >=80 ° big field angle and
Large aperture with FNO≤2.8, while guaranteeing that wide-angle lens according to the present utility model has big visual field, high-resolution, tool
There is relatively high picture brightness.
The utility model efficiently solves camera lens by the combination of glass and plastic lens and the matching of each lens material
The problem of resolving power is with temperature drift, being capable of not empty coke, realization temperature-compensating in -40 DEG C~85 DEG C of range of temperature.
The utility model by the optical texture of 2G3P so that the utility model have while guaranteeing performance it is lower
Cost；The use of plastic aspherical element eyeglass also effectively reduces the length of the utility model wide-angle lens simultaneously, so that wide-angle
Camera lens small in volume.
The foregoing is merely a schemes of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it
Interior, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of wide-angle lens, comprising: the first lens (1) for being arranged successively along optical axis from object side to image side, the second lens (2),
The third lens (3), the 4th lens (4) and the 5th lens (5)；
It further include diaphragm (S)；It is characterized in that,
First lens (1) are the male-female lens with negative power；
Second lens (2) are the concave-convex lens with positive light coke；
The third lens (3) are the biconvex lens with positive light coke；
4th lens (4) are the biconcave lens with negative power；
5th lens (5) are the biconvex lens with positive light coke；
4th lens (4) and the 5th lens (5) constitute cemented doublet group；
Meet relational expression: 4.0 < between the optics overall length TTL of the wide-angle lens and the effective focal length f of the wide-angle lens
TTL/f < 5.60.
2. wide-angle lens according to claim 1, which is characterized in that second lens (2), the 4th lens (4)
It is plastic aspheric lens with the 5th lens (5)；
First lens (1) and the third lens (3) are glass spherical lens.
3. wide-angle lens according to claim 1, which is characterized in that the diaphragm (S) be located at second lens (2) and
Between the third lens (3).
4. wide-angle lens according to any one of claims 1 to 3, which is characterized in that half image height h of the wide-angle lens with
Meet relational expression between the effective focal length f of the wide-angle lens: h/f > 0.75.
5. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the focal length f1 of first lens (1)
Meet relational expression: 0.4 < between the focal length f2 of second lens (2) | f1/f2 | < 0.7.
6. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the focal length f3 of the third lens (3)
Meet relational expression: 1.40 < between the effective focal length f of the wide-angle lens | f3/f | < 2.0.
7. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the refractive index of the 4th lens (4)
Nd4 and the refractive index nd5 of the 5th lens (5) meet respectively: 1.50 < nd4 <, 1.70,1.40 < nd5 < 1.60；
The Abbe number vd4 of 4th lens (4) and the Abbe number vd5 of the 5th lens (5) meet respectively: 40 > vd4,
Vd5 > 50.
8. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the operating temperature of the wide-angle lens
Range are as follows: -40 DEG C~85 DEG C.
9. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the focal power of the cemented doublet group
Meet relational expression: 1.80 < between Bf and the effective focal length f of the wide-angle lens | Bf/f | < 2.30.
10. wide-angle lens according to any one of claims 1 to 3, which is characterized in that the optic back focal of the wide-angle lens
Meet relational expression: 3.50 < TTL/BFL < 4.95 between BFL and the optics overall length TTL of the wide-angle lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785718.6U CN208888458U (en) | 2018-10-30 | 2018-10-30 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785718.6U CN208888458U (en) | 2018-10-30 | 2018-10-30 | Wide-angle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208888458U true CN208888458U (en) | 2019-05-21 |
Family
ID=66517559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821785718.6U Active CN208888458U (en) | 2018-10-30 | 2018-10-30 | Wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208888458U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188654A (en) * | 2018-10-30 | 2019-01-11 | 舜宇光学(中山)有限公司 | Wide-angle lens |
| CN113866959A (en) * | 2021-11-09 | 2021-12-31 | 辽宁中蓝光电科技有限公司 | Ultra-wide angle optical lens |
-
2018
- 2018-10-30 CN CN201821785718.6U patent/CN208888458U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188654A (en) * | 2018-10-30 | 2019-01-11 | 舜宇光学(中山)有限公司 | Wide-angle lens |
| CN113866959A (en) * | 2021-11-09 | 2021-12-31 | 辽宁中蓝光电科技有限公司 | Ultra-wide angle optical lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109188654A (en) | Wide-angle lens | |
| CN102466859B (en) | Optical imaging lens group | |
| CN108873270A (en) | Glass modeling mixing tight shot | |
| CN102466867A (en) | Optical camera lens group | |
| CN106772946A (en) | Small-sized glass modeling mixing is without thermalization tight shot | |
| CN102253470A (en) | Photographing optical lens | |
| CN208888458U (en) | Wide-angle lens | |
| CN102466858A (en) | Wide-viewing angle taking lens group | |
| CN216310389U (en) | Fixed focus lens | |
| CN215575895U (en) | Fixed focus lens | |
| CN103323934A (en) | Imaging lens assembly | |
| CN109061858A (en) | Zoom lens | |
| CN208351116U (en) | Glass modeling mixing tight shot | |
| CN208421389U (en) | Glass modeling mixing tight shot | |
| CN207020389U (en) | A kind of zoom-lens system and zoom lens | |
| CN110412718A (en) | Optical lens | |
| CN110275277A (en) | Glass moulds hybrid lens | |
| CN110441889A (en) | A kind of tight shot | |
| CN108983402A (en) | Large aperture camera lens | |
| CN208421390U (en) | Large aperture camera lens | |
| CN210323549U (en) | Fixed focus lens | |
| CN113534412A (en) | Fixed focus lens | |
| CN210199390U (en) | Fixed focus lens | |
| CN208888464U (en) | Zoom lens | |
| CN113917668A (en) | Fixed focus lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |