CN209028287U - Zoom lens - Google Patents
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- CN209028287U CN209028287U CN201821683130.XU CN201821683130U CN209028287U CN 209028287 U CN209028287 U CN 209028287U CN 201821683130 U CN201821683130 U CN 201821683130U CN 209028287 U CN209028287 U CN 209028287U
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- 239000000571 coke Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000004075 alteration Effects 0.000 description 34
- 238000010586 diagram Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 12
- 230000004304 visual acuity Effects 0.000 description 12
- 239000004568 cement Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 9
- 238000012937 correction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model relates to a kind of zoom lens, have the first lens group of negative power and the second lens group of positive light coke including being arranged successively setting from object side to image side along optical axis, first lens group is linearly moved back and forth along the optical axis during the focusing process；Second lens group linearly moves back and forth in zooming procedure along the optical axis；First lens group includes four pieces of lens, and second lens group includes eight pieces of lens；Meet relational expression: -1.22≤Ff/Fv≤- 0.55 between the focal length Ff of first lens group and the focal length Fv of second lens group.Its wide-angle side maximum field of view angle is up to 140 ° or more, and telescope end minimum field angle is up to 35 ° or less.Maximum ring is less than or equal to 1.2, and for focal length zoom ratio more than or equal to 3.0, the optics overall length ratio of maximum image planes and zoom lens is greater than or equal to 0.19.The utility model can realize that visible light is confocal with infrared light, and under -40 DEG C to 80 DEG C of variation of ambient temperature, camera lens, which is not required to focus again, can guarantee resolution ratio identical with room temperature.
Description
Technical field
The utility model relates to optical system and device design field more particularly to a kind of zoom lens.
Background technique
Zoom lens has a wide range of applications scene in security industry.Tight shot is a since its field angle is fixed
Product can be only applied to special scenes；Since the type of tight shot exploitation is limited, focal length is unlikely to be continuously, is caused
Fixed-focus product is unable to satisfy requirement under certain scenes.Zoom lens is regarded in a certain range due to its focal length continuous variable
Rink corner is also continuous variable, is suitable for more kinds of application scenarios, thus is increasingly favored by market.
It is also higher and higher to the performance requirement of zoom lens with the development of safety monitoring industry.Especially to monitoring
The requirement in the high Qinghua of image quality is higher and higher, and the imager chip that monitoring product uses also upgrades therewith.The peace of mainstream currently on the market
Anti- fixed-focus product has used the big target surface chip of 1/1.8 ' inch, but the zoom lens type for matching 1/1.8 ' chip is seldom,
The zoom lens for meeting big target surface requirement few in number, often the bigger perhaps aperture of volume is smaller or image quality
Difference limits its usage scenario.
Utility model content
One of the utility model is designed to provide a kind of zoom lens, can be suitable for different scenes under clearly at
Picture.
To achieve the above object, the utility model provides a kind of zoom lens, including along optical axis from object side to image side successively
The second lens group of the first lens group and positive light coke with negative power is arranged,
First lens group is linearly moved back and forth along the optical axis during the focusing process；
Second lens group linearly moves back and forth in zooming procedure along the optical axis；
First lens group includes four pieces of lens, and second lens group includes eight pieces of lens；
Meet relational expression between the focal length Ff of first lens group and the focal length Fv of second lens group: -1.22≤
Ff/Fv≤-0.55。
One aspect according to the present utility model, first lens group include being arranged successively along optical axis from object side to image side
The first lens for being negative of focal power, the third lens that are negative of the second lens for being negative of focal power, focal power and focal power be positive
The 4th lens.
One aspect according to the present utility model, second lens group include being arranged successively along optical axis from object side to image side
The 5th lens that are positive of focal power, the 7th lens that are positive of the 6th lens that are negative of focal power, focal power, focal power be negative
The 11st lens and light that the tenth lens that the 9th lens that 8th lens, focal power are positive, focal power are positive, focal power are negative
The 12nd lens that focal power is negative.
One aspect according to the present utility model, second lens, the 8th lens, the 9th lens and described
12nd lens are plastic aspheric lenes.
One aspect according to the present utility model further includes diaphragm, and the diaphragm is located at first lens group and described
Between second lens group.
One aspect according to the present utility model, the 5th lens, the 6th lens and the 7th lens are constituted
Three balsaming lens.
One aspect according to the present utility model, the tenth lens and the 11st lens constitute cemented doublet.
One aspect according to the present utility model, the focal length Fw of the zoom lens wide-angle side and second lens group
Meet between focal length Fv: 0.25≤Fw/Fv≤0.45.
The refractive index nd5 of one aspect according to the present utility model, the 5th lens meets: 1.42≤nd5≤1.63,
The Abbe number vd5 of 5th lens meets: 63≤vd5≤96.
The refractive index nd7 of one aspect according to the present utility model, the 7th lens meets: 1.42≤nd7≤1.63,
The Abbe number vd7 of 7th lens meets: 63≤vd7≤96.
The focal length f9 of one aspect according to the present utility model, the focal length f8 of the 8th lens and the 9th lens it
Between meet: -1.35≤f8/f9≤- 0.86.
A scheme according to the present utility model, the zoom lens of the utility model, wide-angle side maximum field of view angle reach
140 ° or more, telescope end minimum field angle is up to 35 ° or less.Maximum ring is less than or equal to 1.2, and focal length zoom ratio is greater than or equal to
3.0, the optics overall length ratio of maximum image planes and zoom lens is greater than or equal to 0.19.Meanwhile the zoom lens of the utility model
1/1.8 ' chip can be matched and resolving power is up to 1200W or more, it can be achieved that visible light is confocal with infrared light, lens optical is set
Meter contains temperature-compensating, and under -40 DEG C to 80 DEG C of variation of ambient temperature, camera lens is not required to focus again and can guarantee and room temperature
Identical resolution ratio；Lens construction uses the scheme of glass lens and plastic lens mix and match, while guaranteeing excellent properties,
It reduces costs, makes camera lens cost performance with higher.
A scheme according to the present utility model, the zoom lens of the utility model are guaranteeing that camera lens is provided simultaneously with large aperture
Under the premise of matching big target surface, the design difficulty of the zoom lens of the utility model is reduced by using non-spherical lens.
The ability and resolving power of the zoom lens blur-free imaging of the utility model are not only increased, and its present position of reasonable distribution is to fill
Its potential is waved in distribution.Using glass spheric glass and the aspherical reasonably combined scheme of plastic cement, make full use of aspherical lens strong
While big aberration correction ability, largely eliminates plastic lens refractive index and vary with temperature burnt drift after bring, make
Camera lens still has good resolution ratio under high temperature and low temperature.Meanwhile not only having by using plastic aspheric lenes good
The ability of aberration is corrected, and at low cost.
A scheme according to the present utility model, in the zoom lens of the utility model, the second lens are non-using plastic cement
Spherical lens is simultaneously located in the first lens group, and along optical axis direction from object side to image side, the position of the second lens is forward, therefore, leads to
It crosses and is set to the aberration that non-spherical lens has the function of the first lens group of good balance, it is each to be further conducive to correction
The aberration of the outer visual field of burnt section axis.Meanwhile in the second lens group, set the 8th lens, the 9th lens and the 12nd lens to
Plastic cement aspherical lens, the 8th lens, the positional distance diaphragm of the 9th lens are closer in the second lens group, correct the energy of spherical aberration
Power is high, is conducive to promote the utility model zoom lens entirety resolving power and increases the aperture of camera lens.12nd lens are arranged
For plastic cement aspherical lens, this positional distance diaphragm is farthest, can preferably balance the utility model zoom lens different focal length
The curvature of field and astigmatism under section make camera lens all have higher parsing power in each burnt section, and are conducive to be promoted the zoom ratio of camera lens
Rate.
A scheme according to the present utility model, the 5th lens, the 6th lens and the 7th lens are mutually glued to constitute three glue
Close lens.Tenth lens and the mutually glued composition cemented doublet of the 11st lens.By above-mentioned setting, be conducive to zoom lens
The chromatic aberration correction of wide-angle side and telescope end reaches the reasonable balance of zoom whole process color difference, promotes the utility model zoom lens
Performance.
A scheme according to the present utility model, it is full between the focal length Ff of the first lens group and the focal length Fv of the second lens group
Sufficient relational expression: -1.22≤Ff/Fv≤- 0.55.The focal length Ff and the second lens group of first lens group are set according to this relational expression
Focal length Fv, can effectively ensure that the utility model zoom lens have preferable resolving power.If the focal length of the first lens group
The relationship of Ff and the focal length Fv of the second lens group are less than minimum value defined by above-mentioned relation formula, then camera lens is total under fixed multiplying power
Long meeting is elongated, causes overall dimensions to increase, does not meet miniature size requirement, if the focal length Ff and the second lens of the first lens group
The relationship of the focal length Fv of group is greater than maximum value defined by above-mentioned relation formula, then the aberration meeting of the first lens group and the second lens group
Increase, the resolving power of camera lens is caused to decline.
The focal length of a scheme according to the present utility model, the utility model zoom lens wide-angle side is Fw, with second
Meet relational expression: 0.25≤Fw/Fv≤0.45 between the focal length Fv of lens group B.Such setting can guarantee the utility model
Zoom lens has biggish field angle and can balance the aberration of each burnt section well.If the focal length of zoom lens wide-angle side
Ratio between Fw and the focal length Fv of the second lens group B is less than the minimum value of above-mentioned relation formula, then camera lens wide-angle side off-axis aberration
Larger, full focal length section aberration is difficult to balance.If between the focal length Fw of zoom lens wide-angle side and the focal length Fv of the second lens group B
Ratio is greater than the maximum value of above-mentioned relation formula, then the field angle of camera lens wide-angle side is smaller, is not able to satisfy the demand of big field angle.
A scheme according to the present utility model, the 5th lens and the 7th lens position are close to diaphragm, each field of view edge light
Position is higher here for line, using the glass material of high dispersion, the zoom lens of the utility model is made to correct color difference and secondary light
Spectrum color difference it is high-efficient, it is confocal to be advantageously implemented infrared light visible light.
A scheme according to the present utility model, meets between the focal length f8 of the 8th lens and the focal length f9 of the 9th lens :-
1.35≤f8/f9≤-0.86.The focal length that the 8th lens and the 9th lens are constrained according to this relational expression is further conducive to put down
The temperature-compensating of weighing apparatus the utility model zoom lens, the variation of plastic cement aspherical lens refractive index is to rear coke when reducing temperature change
The influence of drift and aberration balancing, makes camera lens under high temperature or low temperature environment, and not needing to focus again remains to have and room temperature ring
Identical resolution ratio under border.
Detailed description of the invention
Fig. 1 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 1；
Fig. 2 is the structure chart for schematically showing the zoom lens telescope end according to the utility model embodiment 1；
Fig. 3 is the zoom lens wide-angle side light sector diagram schematically shown according to the utility model embodiment 1；
Fig. 4 is the zoom lens wide-angle side chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 1；
Fig. 5 is the zoom lens telescope end light sector diagram schematically shown according to the utility model embodiment 1；
Fig. 6 is the zoom lens telescope end chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 1；
Fig. 7 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 2；
Fig. 8 is the structure chart for schematically showing the zoom lens telescope end according to the utility model embodiment 2；
Fig. 9 is the zoom lens wide-angle side light sector diagram schematically shown according to the utility model embodiment 2；
Figure 10 is the zoom lens wide-angle side chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 2；
Figure 11 is the zoom lens telescope end light sector diagram schematically shown according to the utility model embodiment 2；
Figure 12 is the zoom lens telescope end chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 2；
Figure 13 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 3；
Figure 14 is the structure chart for schematically showing the zoom lens telescope end according to the utility model embodiment 3；
Figure 15 is the zoom lens wide-angle side light sector diagram schematically shown according to the utility model embodiment 3；
Figure 16 is the zoom lens wide-angle side chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 3；
Figure 17 is the zoom lens telescope end light sector diagram schematically shown according to the utility model embodiment 3；
Figure 18 is the zoom lens telescope end chromatic longitudiinal aberration figure schematically shown according to the utility model embodiment 3.
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.
Referring to figs. 1 and 2, a kind of embodiment according to the present utility model, the zoom lens packet of the utility model
The first lens group A, diaphragm S and the second lens group B are included, in the present invention, along optical axis from object side to image side, the first lens
Group A, diaphragm S and the second lens group B successively arrange.The first lens group A of the utility model includes four pieces of lens, the second lens group
B includes eight pieces of lens, and the first lens group A is the lens group that total focal power is negative, and the second lens group B is positive saturating for total focal power
Microscope group.
The first lens group A of the utility model includes the first lens 1 being arranged successively along optical axis from object side to image side,
Two lens 2, the third lens 3 and the 4th lens 4.Wherein the first lens 1 are the lens with negative power, and the second lens 2 are tool
There are the lens of negative power, the third lens 3 are the lens with negative power, and the 4th lens 4 are the lens with positive light coke.
The second lens group B of the utility model includes the 5th lens 5 being arranged successively along optical axis from object side to image side,
Six lens 6, the 7th lens 7, the 8th lens 8, the 9th lens 9, the tenth lens 10, the 11st lens 11 and the 12nd lens 12.
Wherein the 5th lens 5 are the lens with positive light coke, and the 6th lens 6 are the lens with negative power, and the 7th lens 7 are tool
There are the lens of positive light coke, the 8th lens 8 are the lens with negative power, and the 9th lens 9 are the lens with positive light coke.
Tenth lens 10 are the lens with positive light coke, and the 11st lens 11 are the lens with negative power, the 12nd lens 12
For the lens with negative power.
That is the zoom lens of the utility model includes successively being arranged from object side to image side along optical axis with negative power
The first lens 1, the second lens 2 with negative power, the third lens 3 with negative power, with positive light coke
Four lens 4, diaphragm S, the 5th lens 5 with positive light coke, the 6th lens 6 with negative power, with positive light coke
7th lens 7, the 8th lens 8 with negative power, the 9th lens 9 with positive light coke, the with positive light coke the tenth
Lens 10, the 11st lens 11 with negative power and the 12nd lens 12 with negative power.
In the present invention, the second lens 2, the 8th lens 8, the 9th lens 9 and the 12nd lens 12 are non-using plastic cement
Spheric glass, the first lens 1, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, the tenth lens
10 and the 11st lens 11 are all made of glass spheric glass.By above-mentioned setting, the zoom lens of the utility model is guaranteeing mirror
Head is provided simultaneously with large aperture and matches big target surface, under the premise of, the change of the utility model is reduced by using non-spherical lens
The design difficulty of zoom lens.The ability and resolving power of the zoom lens blur-free imaging of the utility model are not only increased, and rationally
Its present position is distributed to give full play to its potential.Using glass spheric glass and the aspherical reasonably combined scheme of plastic cement, fill
While dividing using aspherical lens powerful aberration correction ability, largely eliminates plastic lens refractive index and vary with temperature
Burnt drift, makes camera lens still have good resolution ratio under high temperature and low temperature after bring.Meanwhile it is aspherical by using plastic cement
Lens not only have the ability of good correction aberration, but also at low cost.
By above-mentioned setting, in the zoom lens of the utility model, the second lens 2 are using plastic aspheric lenes and position
In the first lens group A, along optical axis direction from object side to image side, the position of the second lens 2 is forward, therefore, by being arranged
For non-spherical lens, be conducive to correct aberration in the group of the first lens group A.Meanwhile in the second lens group B, by the 8th lens
8, the 9th lens 9 and the 12nd lens 12 are set as plastic cement aspherical lens, and the 8th lens the 8, the 9th are saturating in the second lens group B
The positional distance diaphragm S of mirror 9 is closer, and the ability for correcting spherical aberration is high, is conducive to promote the utility model zoom lens global solution picture
Power and the aperture for increasing camera lens.Plastic cement aspherical lens are set by the 12nd lens 12, this positional distance diaphragm S is farthest, can
Preferably to balance the curvature of field and astigmatism under the utility model zoom lens different focal length section, make camera lens each burnt section all have compared with
High parsing power, and be conducive to be promoted the zoom ratio of camera lens.
Referring to figs. 1 and 2, a kind of embodiment according to the present utility model, the 5th lens 5, the 6th lens 6 and
Seven lens 7 are mutually glued to constitute three balsaming lens.Tenth lens 10 and the mutually glued composition cemented doublet of the 11st lens 11.
By above-mentioned setting, be conducive to the chromatic aberration correction of zoom lens wide-angle side and telescope end, reach the reasonable flat of zoom whole process color difference
Weighing apparatus promotes the performance of the utility model zoom lens.
A kind of embodiment according to the present utility model, the focal length of the first lens group A are Ff, the focal length of the second lens group B
For Fv, meet relational expression between the focal length Ff of the first lens group A and the focal length Fv of the second lens group B: -1.22≤Ff/Fv≤-
0.55.The focal length Fv of the focal length Ff and the second lens group B of first lens group A are set according to this relational expression, can effectively ensure that
The zoom lens of the utility model has preferable resolving power.If the focal length of the focal length Ff of the first lens group A and the second lens group B
The relationship of Fv is less than minimum value defined by above-mentioned relation formula, then camera lens overall length can be elongated under fixed multiplying power, causes whole ruler
Very little increase does not meet miniature size requirement, if the relationship of the focal length Fv of the focal length Ff of the first lens group A and the second lens group B
Greater than maximum value defined by above-mentioned relation formula, then the aberration of the first lens group A and the second lens group B will increase, and cause camera lens
Resolving power decline.
A kind of embodiment according to the present utility model, the focal length of the utility model zoom lens wide-angle side are Fw, with
Meet relational expression: 0.25≤Fw/Fv≤0.45 between the focal length Fv of second lens group B.Such setting can guarantee that this is practical new
The zoom lens of type has biggish field angle and can balance the aberration of each burnt section well.If zoom lens wide-angle side
Ratio between focal length Fw and the focal length Fv of the second lens group B is less than the minimum value of above-mentioned relation formula, then outside camera lens wide-angle side axis
Aberration is larger, and full focal length section aberration is difficult to balance.If the focal length Fv of the focal length Fw of zoom lens wide-angle side and the second lens group B it
Between ratio be greater than above-mentioned relation formula maximum value, then the field angle of camera lens wide-angle side is smaller, is not able to satisfy the need of big field angle
It asks.
The refractive index nd5 of a kind of embodiment according to the present utility model, the 5th lens 5 meets: 1.42≤nd5≤
1.63, the Abbe number vd5 of the 5th lens 5 meets: 63≤vd5≤96.The refractive index nd7 of 7th lens 7 meets: 1.42≤nd7
≤ 1.63, the Abbe number vd7 of the 7th lens 7 meets: 63≤vd7≤96.5th lens 5 and the 7th lens 7 are located proximate to diaphragm
S, position is higher here for each field of view edge light, using the glass material of high dispersion, rectifys the zoom lens of the utility model
Just color difference and second order spectrum color difference is high-efficient, and it is confocal to be advantageously implemented infrared light visible light.
A kind of embodiment according to the present utility model, between the focal length f8 of the 8th lens 8 and the focal length f9 of the 9th lens 9
Meet: -1.35≤f8/f9≤- 0.86.The focal length of the 8th lens 8 and the 9th lens 9 is constrained according to this relational expression, further
The temperature-compensating for being conducive to balance the utility model zoom lens, the change of plastic cement aspherical lens refractive index when reducing temperature change
Change the influence to rear burnt drift and aberration balancing, makes camera lens under high temperature or low temperature environment, not needing to focus again remains to have
With resolution ratio identical under normal temperature environment.
The utility model glass moulds compound zoom camera lens, and up to 140 ° or more, telescope end is minimum at wide-angle side maximum field of view angle
Field angle is up to 35 ° or less.Maximum ring≤1.2, focal length zoom ratio > 3.0, maximum image planes and optics overall length ratio >=0.19,
1/1.8 ' chip can be matched and resolving power reaches 1200W, it can be achieved that visible light is confocal with infrared light, lens optical design contains
Temperature-compensating, under -40 DEG C to 80 DEG C of variation of ambient temperature, camera lens, which is not required to focus again, can guarantee identical with room temperature point
Resolution；Lens construction uses the scheme of glass lens and plastic lens mix and match, takes full advantage of aspherical correction aberration
Ability has evaded plastic material and temperature-compensating bring unfavorable factor is reduced costs, made while guaranteeing excellent properties
Camera lens cost performance with higher, has vast market prospect.
The zoom lens of the utility model, the second lens 2, the 8th lens 8, the 9th lens 9 and the 12nd lens 12 are modeling
Glue non-spherical lens, all aspherical face types should meet aspherical equation formula:
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a4y4+a6y6+a8y8+a10y10+a12y12,
Wherein, parameter c is curvature corresponding to the radius of non-spherical lens, and y is the radial coordinate of non-spherical lens, list
Position is identical as length of lens unit.K is the circular cone whose conic coefficient of non-spherical lens.a4, a6、a8、a10、a12Respectively aspheric
The corresponding order coefficient in face.
It is the changes in material of each lens and each relevant parameter in zoom lens according to the present utility model below
Difference provides three groups of embodiments to illustrate zoom lens according to the present utility model.Above-mentioned implementation according to the present utility model
Mode includes four pieces of lens in the first lens group A, includes eight pieces of lens in the second lens group B, wherein the 5th lens the 5, the 6th are thoroughly
Mirror 6 and the 7th lens 7 constitute three balsaming lens, and the tenth lens 10 and the 11st lens 11 constitute cemented doublet.Thoroughly first
Diaphragm S is equipped between microscope group A and the second lens group B.I.e. the zoom lens of the utility model has 22 optical surfaces, this 22 light
Face is arranged successively arrangement according to the structural order of the utility model, for the ease of narration explanation, according to the number of optical surface into
Row number, number S1-S22.In addition, also there is imaging surface in the imaging system using the zoom lens of the utility model
(IMA)。
Data in three groups of embodiments are as shown in table 1 below:
| Conditional | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| -1.22≤Ff/Fv≤-0.55 | -1.22 | -0.8 | -0.55 |
| 0.25≤Fw/Fv≤0.45 | 0.25 | 0.33 | 0.45 |
| 1.42≤nd5≤1.63 | 1.42 | 1.55 | 1.63 |
| 63≤vd5≤96 | 95.5 | 75.56 | 63.02 |
| 1.42≤nd7≤1.63 | 1.63 | 1.42 | 1.55 |
| 63≤vd7≤96 | 63.02 | 95.5 | 75.56 |
| -1.35≤f8/f9≤-0.86 | -1.35 | -1.05 | -0.86 |
Table 1
As shown in Table 1, in the zoom lens of three groups of embodiments according to the present utility model parameters setting, meet this
Requirement of the utility model zoom lens for each Parameter Conditions.
Fig. 1 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 1.Fig. 2 is to show
Meaning property indicates the structure chart of the zoom lens telescope end according to the utility model embodiment 1.As shown in Figure 1 and Figure 2, in this implementation
In example, the first lens group A of zoom lens includes four pieces of lens, and the second lens group B includes eight pieces of lens.
Following table 2 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material (refractive index/
Abbe number):
Table 2
Following table 3 lists each asphericity coefficient:
| Serial number | k | a4 | a6 | a8 | a10 | a12 |
| S3 | -0.332 | -1.38E-04 | -5.19E-06 | 0 | 0 | 0 |
| S4 | -0.166 | -2.43E-04 | -8.29E-06 | 0 | 0 | 0 |
| S14 | -7.602 | -2.78E-03 | 5.91E-07 | 2.34E-06 | -8.09E-08 | 2.50E-10 |
| S15 | -6.387 | -4.06E-03 | 3.58E-05 | 4.28E-07 | -2.83E-08 | -3.48E-09 |
| S16 | -0.431 | -7.99E-04 | -4.18E-05 | 7.61E-07 | -7.92E-09 | 6.39E-11 |
| S17 | -0.696 | -3.82E-03 | -1.60E-05 | 5.05E-07 | -3.91E-08 | 3.07E-10 |
| S21 | -0.718 | -1.29E-03 | -1.94E-05 | 7.23E-07 | -1.02E-06 | -5.15E-09 |
| S22 | 2.1769 | -4.01E-04 | 4.66E-05 | -3.07E-06 | -3.47E-08 | 8.71E-09 |
Table 3
By table 1, table 2 and table 3 it is found that in the present embodiment, the setting of each lens relevant parameter meets the utility model change
The condition requirement of zoom lens.Fig. 3-Fig. 6 is the wide-angle for schematically showing the zoom lens according to the utility model embodiment 1 respectively
Hold light sector diagram, wide-angle side chromatic longitudiinal aberration figure, telescope end light sector diagram and telescope end chromatic longitudiinal aberration figure.It can by Fig. 3-Fig. 6
Know, the zoom lens of the utility model is arranged according to the relevant parameter of each lens in embodiment 1, the utility model can be made
The zoom zoom ratio of zoom lens is 3.0, maximum ring 1.2, and wide-angle side field angle is 142 °, and telescope end field angle is 34 °,
1/1.8 ' chip can be matched and resolving power reaches 1200W；Have it is infrared visible confocal, -40 DEG C to 80 DEG C environment temperatures become
Under change, camera lens, which is not required to focus again, can guarantee resolution ratio identical with room temperature.
Fig. 7 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 2.Fig. 8 is to show
Meaning property indicates the structure chart of the zoom lens telescope end according to the utility model embodiment 2.As shown in Figure 7, Figure 8, in this implementation
In example, the first lens group A of zoom lens includes four pieces of lens, and the second lens group B includes eight pieces of lens.
Following table 4 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material (refractive index/
Abbe number):
4 following table 5 of table lists each asphericity coefficient:
Table 5
By table 1, table 4 and table 5 it is found that in the present embodiment, the setting of each lens relevant parameter meets the utility model change
The condition requirement of zoom lens.Fig. 9-Figure 12 is schematically shown according to the wide of the zoom lens of the utility model embodiment 2 respectively
Angle end light sector diagram, wide-angle side chromatic longitudiinal aberration figure, telescope end light sector diagram and telescope end chromatic longitudiinal aberration figure.By Fig. 9-Figure 12
It is found that arranging the zoom lens of the utility model according to the relevant parameter of each lens in embodiment 2, the utility model can be made
The zoom zoom ratio of zoom lens reach 3.0, maximum ring 1.2, wide-angle side field angle is 140 °, and telescope end field angle is
33 °, 1/1.8 ' chip can be matched and resolving power reaches 1200W；Have it is infrared visible confocal, in -40 DEG C to 80 DEG C of environment temperature
Under degree variation, camera lens, which is not required to focus again, can guarantee resolution ratio identical with room temperature.
Figure 13 is the structure chart for schematically showing the zoom lens wide-angle side according to the utility model embodiment 3.Figure 14 is
Schematically show the structure chart of the zoom lens telescope end according to the utility model embodiment 3.As shown in figs. 13 and 14, at this
In embodiment, the first lens group A of zoom lens includes four pieces of lens, and the second lens group B includes eight pieces of lens.
Following table 6 lists the relevant parameter of each lens, including surface type, radius of curvature, thickness, material (refractive index/
Abbe number):
6 following table 7 of table lists each asphericity coefficient:
Table 7
By table 1, table 6 and table 7 it is found that in the present embodiment, the setting of each lens relevant parameter meets the utility model change
The condition requirement of zoom lens.Figure 15-Figure 18 is schematically shown according to the wide of the zoom lens of the utility model embodiment 3 respectively
Angle end light sector diagram, wide-angle side chromatic longitudiinal aberration figure, telescope end light sector diagram and telescope end chromatic longitudiinal aberration figure.By Figure 15-figure
18 it is found that arrange the zoom lens of the utility model according to the relevant parameter of each lens in embodiment 3, this can be made practical new
For the zoom zoom ratio of the zoom lens of type up to 3.0, maximum ring 1.2, wide-angle side field angle is 140 °, and telescope end field angle is
34 °, 1/1.8 ' chip can be matched and resolving power reaches 1200W；Have it is infrared visible confocal, in -40 DEG C to 80 DEG C of environment temperature
Under degree variation, camera lens, which is not required to focus again, can guarantee resolution ratio identical with room temperature.
Above content is only the example of the concrete scheme of the utility model, for the equipment and knot of wherein not detailed description
Structure, it should be understood that the existing common apparatus in this field and universal method is taken to be practiced.
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 (11)
1. a kind of zoom lens, the first lens group that there is negative power including being arranged successively setting from object side to image side along optical axis
(A) and the second lens group (B) of positive light coke, which is characterized in that
First lens group (A) linearly moves back and forth along the optical axis during the focusing process；
Second lens group (B) linearly moves back and forth in zooming procedure along the optical axis；
First lens group (A) includes four pieces of lens, and second lens group (B) includes eight pieces of lens；
Meet relational expression between the focal length Ff of first lens group (A) and the focal length Fv of second lens group (B): -1.22
≤Ff/Fv≤-0.55。
2. zoom lens according to claim 1, which is characterized in that first lens group (A) includes along optical axis from object
The second lens (2) that the first lens (1) that the focal power that side to image side is arranged successively is negative, focal power are negative, focal power are negative
The third lens (3) and the 4th lens (4) that are positive of focal power.
3. zoom lens according to claim 2, which is characterized in that second lens group (B) includes along optical axis from object
The 6th lens (6) that the 5th lens (5) that the focal power that side to image side is arranged successively is positive, focal power are negative, focal power are positive
The 7th lens (7), the 9th lens (9) that are positive of the 8th lens (8) that are negative of focal power, focal power, focal power be positive
The 12nd lens (12) that the 11st lens (11) and focal power that ten lens (10), focal power are negative are negative.
4. zoom lens according to claim 3, which is characterized in that second lens (2), the 8th lens (8),
9th lens (9) and the 12nd lens (12) are plastic aspheric lenes.
5. zoom lens according to claim 3, which is characterized in that further include diaphragm (S), the diaphragm (S) is located at institute
It states between the first lens group (A) and second lens group (B).
6. zoom lens according to claim 3, which is characterized in that the 5th lens (5), the 6th lens (6)
Three balsaming lens are constituted with the 7th lens (7).
7. zoom lens according to claim 3, which is characterized in that the tenth lens (10) and the 11st lens
(11) cemented doublet is constituted.
8. zoom lens according to any one of claims 1 to 7, which is characterized in that the coke of the zoom lens wide-angle side
Meet between focal length Fv away from Fw and second lens group (B): 0.25≤Fw/Fv≤0.45.
9. according to the described in any item zoom lens of claim 3-7, which is characterized in that the refractive index of the 5th lens (5)
Nd5 meets: 1.42≤nd5≤1.63,
The Abbe number vd5 of 5th lens (5) meets: 63≤vd5≤96.
10. according to the described in any item zoom lens of claim 3-7, which is characterized in that the refractive index of the 7th lens (7)
Nd7 meets: 1.42≤nd7≤1.63,
The Abbe number vd7 of 7th lens (7) meets: 63≤vd7≤96.
11. according to the described in any item zoom lens of claim 3-7, which is characterized in that the focal length f8 of the 8th lens (8)
Meet between the focal length f9 of the 9th lens (9): -1.35≤f8/f9≤- 0.86.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683130.XU CN209028287U (en) | 2018-10-17 | 2018-10-17 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683130.XU CN209028287U (en) | 2018-10-17 | 2018-10-17 | Zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209028287U true CN209028287U (en) | 2019-06-25 |
Family
ID=66906429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821683130.XU Withdrawn - After Issue CN209028287U (en) | 2018-10-17 | 2018-10-17 | Zoom lens |
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| Country | Link |
|---|---|
| CN (1) | CN209028287U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116532A (en) * | 2018-10-17 | 2019-01-01 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN111562663A (en) * | 2020-06-02 | 2020-08-21 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111880302A (en) * | 2020-06-28 | 2020-11-03 | 浙江大学 | Medical endoscopic optical zoom lens with high magnification and wide angle |
-
2018
- 2018-10-17 CN CN201821683130.XU patent/CN209028287U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116532A (en) * | 2018-10-17 | 2019-01-01 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN109116532B (en) * | 2018-10-17 | 2024-06-18 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN111562663A (en) * | 2020-06-02 | 2020-08-21 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111562663B (en) * | 2020-06-02 | 2021-02-23 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN111880302A (en) * | 2020-06-28 | 2020-11-03 | 浙江大学 | Medical endoscopic optical zoom lens with high magnification and wide angle |
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