CN207020389U - A kind of zoom-lens system and zoom lens - Google Patents
A kind of zoom-lens system and zoom lens Download PDFInfo
- Publication number
- CN207020389U CN207020389U CN201720383001.8U CN201720383001U CN207020389U CN 207020389 U CN207020389 U CN 207020389U CN 201720383001 U CN201720383001 U CN 201720383001U CN 207020389 U CN207020389 U CN 207020389U
- Authority
- CN
- China
- Prior art keywords
- lens
- zoom
- focal power
- lens group
- group
- 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 provides a kind of zoom-lens system and zoom lens, and the zoom-lens system includes successively from the object side to image side along optical axis：Focal power is the first negative lens group, focal power is the second negative lens group, focal power is positive the 3rd lens group and focal power is the 4th positive lens group；Also include being arranged between second lens group and the 3rd lens group, or the aperture diaphragm being arranged between the 3rd lens group and the 4th lens group；Wherein, the 4th lens group, include successively from the object side to image side along optical axis：Focal power is the 6th positive lens, focal power is the first negative sub-lens group, focal power is positive the second sub-lens group and focal power is the 3rd negative sub-lens group；Wherein, the 6th lens are non-spherical lens；In the program, under the structure of each lens and lens group, focal power, focal length, the cooperation that puts in order, the low blur-free imaging according under environment can be realized under conditions of big image planes are met.
Description
Technical field
Optical instrument field is the utility model is related to, more particularly to a kind of zoom-lens system and zoom lens.
Background technology
In safety-security area, existing security lens are generally divided into tight shot and zoom lens, the image planes chi of tight shot
It is very little generally bigger, but tight shot can not adapt to various complicated monitoring scenes, and the image planes size of zoom lens is generally all
It is smaller, it can not so stay close the development step of following security protection high-end product.
Although the pick-up lens of big image planes is existing in other application field, such as：Slr camera camera lens, but this camera lens
Aperture (such as：F2.8, F3.5, F4.0 etc.) usual very little, if such camera lens is applied into safety-security area, in night low photograph
, just can not blur-free imaging under environment.
Based on this, research and development are a under conditions of big image planes (4/3 inch) are met, it is possible to achieve low according to clear under environment
The camera lens of imaging just seems necessary.
Utility model content
The utility model embodiment provides a kind of zoom-lens system and zoom lens, to meet big image planes (4/3
Inch) under conditions of, realize the low blur-free imaging according under environment.
A kind of zoom-lens system that the utility model embodiment provides, includes successively from the object side to image side along optical axis：
Focal power is the first negative lens group, focal power is the second negative lens group, focal power is positive the 3rd lens group and focal power
For the 4th positive lens group；Also include being arranged between second lens group and the 3rd lens group, or be arranged on described
Aperture diaphragm between 3rd lens group and the 4th lens group；
Wherein, the 4th lens group, include successively from the object side to image side along optical axis：Focal power is saturating for positive the 6th
Mirror, focal power are the first negative sub-lens group, focal power is positive the second sub-lens group and focal power be the 3rd negative son thoroughly
Microscope group；Wherein, the 6th lens are non-spherical lens；
Also, each lens and the focal length of lens group meet following condition：
-3.32≤f1/fw≤-2.32；2.3≤f4/fw≤ 3.3, and 1.46≤f4/ft≤2.06；
0.61≤f41/f4≤0.91；0.33≤f46/f4≤0.73；
Wherein, f1Represent the focal length of first lens group, f4Represent the focal length of the 4th lens group, fwDescribed in expression
Zoom-lens system is in the focal length of wide-angle side, ftRepresent focal length of the zoom-lens system in telescope end, f41Represent described
The focal length of six lens, f46Represent the focal length of the second sub-lens group.
It is preferred that the focal length f of second lens group2Meet condition：-10.8≤f2/fw≤-8.8。
It is preferred that the focal length f of the 3rd lens group3Meet condition：7.5≤f3/fw≤8.5。
It is preferred that the first sub-lens group includes successively from the object side to image side along optical axis：Focal power is the negative the 7th
Lens, focal power are the 8th positive lens, focal power is the 9th negative lens, focal power is the tenth positive lens；Wherein, it is described
7th lens are the meniscus lens convex surface facing thing side, and the 8th lens and the tenth lens are respectively biconvex lens, described the
Nine lens are biconcave lens, and the Abbe number of the 8th lens and the tenth lens is between 55 to 91.
It is preferred that the 8th lens and the 9th lens are glued together, and the 9th lens and the described tenth
Lens are glued together；Or
7th lens and the 8th lens are glued together, and the 9th lens and the tenth lens are glued
Together.
It is preferred that the second sub-lens group is the 11st positive lens including focal power；Wherein, the 11st lens
For non-spherical lens, and the refractive index N of the glass material of the 11st lensd11Meet condition：Nd11≥1.84。
It is preferred that the 3rd sub-lens group includes successively from the object side to image side along optical axis：Focal power is the negative the tenth
Two lens and focal power are the 13rd negative lens；Wherein, the 12nd lens are biconcave lens, and the 13rd lens are
Non-spherical lens.
It is preferred that first lens group, includes successively from the object side to image side along optical axis：Focal power is saturating for negative first
Mirror, focal power are negative the second lens and focal power is the 3rd positive lens；Wherein, first lens are convex surface facing thing side
Meniscus lens, second lens are biconcave lens, and the 3rd lens are the meniscus lens convex surface facing thing side, lenticular
Mirror or towards image side surface be plane planoconvex spotlight.
It is preferred that second lens and the 3rd lens are glued together.
It is preferred that second lens group includes focal power for the 4th negative lens；Wherein, the 4th lens are convex surface
Towards the meniscus lens of image side.
It is preferred that the 3rd lens group is the 5th positive lens including at least focal power；Wherein, the 5th lens are biconvex
Lens or towards thing side surface be plane planoconvex spotlight.
The utility model embodiment provides a kind of zoom lens, includes successively from the object side to image side along optical axis：This reality
The zoom-lens system and imaging surface provided with new any embodiment.
It is preferred that zoom lens also includes：The optical filter being arranged between the zoom-lens system and the imaging surface.
The utility model embodiment has the beneficial effect that：
In zoom-lens system and zoom lens that the utility model embodiment provides, in each lens and the knot of lens group
Under structure, focal power, focal length, the cooperation that puts in order, it can be realized low according to clear under environment under conditions of big image planes are met
Imaging.
Brief description of the drawings
Fig. 1 (a) is the structural representation for the first zoom-lens system that the utility model embodiment provides；
Fig. 1 (b) is the structural representation for second of zoom-lens system that the utility model embodiment provides；
Fig. 1 (c) is the structural representation for the third zoom-lens system that the utility model embodiment provides；
Fig. 1 (d) is the structural representation for the 4th kind of zoom-lens system that the utility model embodiment provides；
Fig. 2 is the structural representation for the zoom lens that the utility model embodiment provides；
Fig. 3 is the optical transfer function for zoom lens visible light part in wide-angle side that the utility model embodiment provides
(MTF) curve map；
Fig. 4 is the optical transfer function for zoom lens visible light part in telescope end that the utility model embodiment provides
(MTF) curve map；
Fig. 5 is the curvature of field figure for zoom lens visible light part in wide-angle side that the utility model embodiment provides；
Fig. 6 is the curvature of field figure for zoom lens visible light part in telescope end that the utility model embodiment provides；
Fig. 7 is the axial chromatic aberration curve for zoom lens visible light part in wide-angle side that the utility model embodiment provides
Figure；
Fig. 8 is the axial chromatic aberration curve for zoom lens visible light part in telescope end that the utility model embodiment provides
Figure；
Fig. 9 is the chromatic longitudiinal aberration curve for zoom lens visible light part in wide-angle side that the utility model embodiment provides
Figure；
Figure 10 is that the chromatic longitudiinal aberration for zoom lens visible light part in telescope end that the utility model embodiment provides is bent
Line chart.
Embodiment
The utility model embodiment provides a kind of zoom-lens system and zoom lens, to meet the bar of big image planes
Under part, the low blur-free imaging according under environment is realized.
A kind of zoom-lens system that the utility model embodiment provides, includes successively from the object side to image side along optical axis：
Focal power is the first negative lens group, focal power is the second negative lens group, focal power is positive the 3rd lens group and focal power
For the 4th positive lens group；Also include being arranged between second lens group and the 3rd lens group, or be arranged on described
Aperture diaphragm between 3rd lens group and the 4th lens group；
Wherein, the 4th lens group, include successively from the object side to image side along optical axis：Focal power is saturating for positive the 6th
Mirror, focal power are the first negative sub-lens group, focal power is positive the second sub-lens group and focal power be the 3rd negative son thoroughly
Microscope group；Wherein, the 6th lens are non-spherical lens；
Also, each lens and the focal length of lens group meet following condition：
-3.32≤f1/fw≤-2.32；2.3≤f4/fw≤ 3.3, and 1.46≤f4/ft≤2.06；
0.61≤f41/f4≤0.91；0.33≤f46/f4≤0.73；
Wherein, f1Represent the focal length of first lens group, f4Represent the focal length of the 4th lens group, fwDescribed in expression
Zoom-lens system is in the focal length of wide-angle side, ftRepresent focal length of the zoom-lens system in telescope end, f41Represent described
The focal length of six lens, f46Represent the focal length of the second sub-lens group.
In the utility model embodiment, in the structure of each lens and lens group, focal power, focal length, the cooperation to put in order
Under, the low blur-free imaging according under environment can be realized under conditions of big image planes are met.
On the basis of the parameter request of above optical system is met, the structure of each lens group can be had as needed
The adjustment of body, the utility model embodiment is described in further detail with reference to Figure of description.
As shown in Fig. 1 (a), a kind of structural representation of the zoom-lens system provided for the utility model case study on implementation.
The zoom-lens system, include successively from the object side to image side along optical axis：Focal power is the first negative lens group 1, focal power is
Negative the second lens group 2, focal power are positive the 3rd lens group 3 and focal power is the 4th positive lens group 4；Also include being arranged on
Aperture diaphragm 5 between 3rd lens group 3 and the 4th lens group 4.Certainly, aperture diaphragm 5 may also be arranged on the second lens group 2 with
Between 3rd lens group 3, the utility model embodiment is not defined to this.
As shown in Fig. 1 (a), the first lens group 1 includes successively from the object side to image side along optical axis：Focal power is negative first
Lens 11, focal power are negative the second lens 12 and focal power is the 3rd positive lens 13；Wherein, the first lens 11 are convex surface court
To the meniscus lens of thing side, the second lens 12 are biconcave lens, and the 3rd lens 13 are the meniscus lens convex surface facing thing side.
As shown in Fig. 1 (a), the second lens group 2 includes focal power for the 4th negative lens 14；Wherein, the 4th lens 14 are
Convex surface facing the meniscus lens of image side.
As shown in Fig. 1 (a), the 3rd lens group 3 is the 5th positive lens 15 including focal power；Wherein, the 5th lens 15 are
Biconvex lens.
As shown in Fig. 1 (a), the 4th lens group 4 includes successively from the object side to image side along optical axis：Focal power is the positive the 6th
Lens 16, focal power are the first negative sub-lens group, focal power is positive the second sub-lens group and focal power is negative the 3
Sub-lens group；Wherein, the 6th lens 16 are non-spherical lens.
As shown in Fig. 1 (a), the first sub-lens group includes successively from the object side to image side along optical axis：Focal power is negative the
Seven lens 17, focal power are the 8th positive lens 18, focal power is the 9th negative lens 19, focal power is the tenth positive lens
20；Wherein, the 7th lens 17 are the meniscus lens convex surface facing thing side, and the 8th lens 18 and the tenth lens 20 are respectively lenticular
Mirror, the 9th lens 19 are biconcave lens.
As shown in Fig. 1 (a), the second sub-lens group is the 11st positive lens 21 including focal power；Wherein, the 11st lens
21 be non-spherical lens.
Certainly, in the case where optical system length allows, the 11st lens 21 can by multiple spherical lenses for combining Lai
Substitute, to realize the function of the 11st lens 21.
As shown in Fig. 1 (a), the 3rd sub-lens group includes successively from the object side to image side along optical axis：Focal power is negative the
12 lens 22 and focal power are the 13rd negative lens 23；Wherein, the 12nd lens 22 are biconcave lens, the 13rd lens 23
For non-spherical lens.
Certainly, in the case where optical system length allows, the 13rd lens 23 can by multiple spherical lenses for combining Lai
Substitute, to realize the function of the 13rd lens 23.
Also, each lens and the focal length of lens group meet following condition：
-3.32≤f1/fw≤-2.32；2.3≤f4/fw≤ 3.3, and 1.46≤f4/ft≤2.06；
0.61≤f41/f4≤0.91；0.33≤f46/f4≤0.73；
Wherein, f1Represent the focal length of the first lens group 1, f4Represent the focal length of the 4th lens group 4, fwRepresent zoom lens system
Unite in the focal length of wide-angle side, ftRepresent zoom-lens system in the focal length of telescope end, f41Represent the focal length of the 6th lens 16, f46Table
Show the focal length of the 11st lens 21.
It should be noted that in the utility model embodiment, make in above-mentioned zoom-lens system from wide-angle side to telescope end
Focal length change when, the 3rd lens group 3 is fixed on optical axis, the first lens group 1, the second lens group 2 and the 4th lens group 4 by
Gradually drawn close to the 3rd lens group 3, the first lens group 1 coordinates with the second lens group 2, can increase optical system zoom ratio；First
The focal power of lens group 1 is negative, and the light of big visual field can be made to enter optical system, at the same can balance system coma and the curvature of field；
Second lens group, 2 main further adjustment light angle, can be received by rear group of optical system well；3rd lens group
3 focal powers are just, the astigmatism of correction optical system, the curvature of field, spherical aberration to be played an important role, and enter optical system to Fast Convergent
Light play a crucial role；4th lens group 4 mainly corrects optical system spherical aberration, coma, the curvature of field, aberration etc.；The utility model
The zoom-lens system that embodiment provides, it is possible to achieve 4/3 inch of image planes size, the high-resolution of 12,000,000 pixels, and
Also can blur-free imaging under low photograph environment.
In a better embodiment, the focal length f of the second lens group 22Meet condition：-10.8≤f2/fw≤-8.8。
In a better embodiment, the focal length f of the 3rd lens group 33Meet condition：7.5≤f3/fw≤8.5。
In a better embodiment, the Abbe number of the 8th lens 18 and the tenth lens 20 is between 55 to 91.This reality
With in new embodiment, the Abbe number of the 8th lens 18 and the tenth lens 20 is larger in the first sub-lens group, and its material belongs to low
The 7th lens 17 of high refraction material and the 9th lens 19 coordinate in dispersion material, with the first sub-lens group, can effectively subtract
Mini system aberration.
In a better embodiment, the refractive index N of the glass material of the 11st lens 21d11Meet condition：Nd11≥
1.84.Because the refractive index of the glass material of the 11st lens 21 is higher, therefore convergence light can be played an important role.
In a better embodiment, the second lens 12 towards image side surface and the 3rd lens 13 towards thing side surface
Curvature it is consistent.
In a better embodiment, as shown in Fig. 1 (a), the second lens 12 and the 3rd lens 13 are glued together；When
So, the second lens 12 also can be only close together with the 3rd lens 13, and without gluing, the utility model embodiment is not entered to this
Row limits.
In a better embodiment, as shown in Fig. 1 (a), aperture diaphragm 5 is arranged at the 5th lens 15 towards the one side of image side
Near.Certainly, aperture diaphragm 5 may also set up in the 5th lens 15 towards near the one side of thing side, and the utility model embodiment is to this
It is not defined.
In a better embodiment, as shown in Fig. 1 (a), the 8th lens 18 and the 9th lens 19 are glued together, and the
Nine lens 19 and the tenth lens 20 are glued together.
In another better embodiment, the 7th lens 17 and the 8th lens 18 are glued together, and the 9th lens 19 with
Tenth lens 20 are glued together.
It is of course also possible to it is that the 7th lens 17, the 8th lens 18, the 9th lens 19 and the tenth lens 20 are all only close one
Rise, without gluing, the utility model embodiment is not defined to this.
As shown in Fig. 1 (b), the 3rd lens 13 can also be biconvex lens in the first lens group 1.
It towards the surface of image side is the flat of plane that the 3rd lens 13, which can also be, as shown in Fig. 1 (c), in the first lens group 1
Convex lens.
It towards the surface of thing side is the flat of plane that the 5th lens 15, which can also be, as shown in Fig. 1 (d), in the 3rd lens group 3
Convex lens.
In a better embodiment, the 3rd lens group 3 can also be that a focal power be negative meniscus lens and one
Focal power is the glued lens group of positive biconvex lens, or the 3rd lens group 3 can also be that a surface towards thing side is
Plane and focal power are positive planoconvex spotlight and a focal power is the glued lens group of negative meniscus lens, and the utility model is real
Example is applied not to be defined this.In this case, it is attached can be arranged on one side of the balsaming lens group towards image side for aperture diaphragm 5
It is near or towards near the one side of thing side.
It is pointed out that in the utility model embodiment, if without particularly pointing out, refractive index all refers to optical glass material phase
For the refractive index (refractive index of the optical glass material obtained by d flash rangings) of d light, it is relative that Abbe number all refers to optical glass material
In the Abbe number (Abbe number obtained with the refractive index of the optical glass material obtained by d flash rangings) of d light.Wherein, d light representations ripple
A length of 589.3nm sodium gold-tinted.
Conceived based on same utility model, the utility model embodiment additionally provides a kind of zoom lens, along optical axis from
Thing side includes successively to image side：The zoom-lens system and imaging surface 6 that the utility model any embodiment provides.One of which knot
Structure schematic diagram is as shown in Fig. 2 Fig. 2 includes the zoom-lens system shown in Fig. 1 (a).
In a better embodiment, in order to reduce colour cast, as shown in Fig. 2 the zoom lens can also include：It is arranged at
Optical filter 7 between zoom-lens system and imaging surface 6.
It should be noted that when zoom lens makees focal length change from wide-angle side to telescope end, optical filter 7 can be with
4th lens group 4 is gradually drawn close to the 3rd lens group 3 together, and optical filter 7 can also be fixed on optical axis, and the 4th lens group 4
Gradually drawn close to the 3rd lens group 3.In wide-angle side or telescope end, both modes between the 13rd lens 23 and imaging surface 6
Light path keep it is constant.
Due to the zoom lens of the utility model embodiment, using above-mentioned zoom-lens system, aberration obtains well
Correction, image planes size is big, and imaging resolution is high, and image quality is excellent, can be low according to blur-free imaging under environment.
By taking the zoom lens shown in Fig. 2 as an example, the zoom lens includes 3 non-spherical lens (the 6th lens the 16, the 11st
The lens 23 of lens 21 and the 13rd), and each non-spherical lens has at least one aspherical minute surface, and each aspherical minute surface
Meet following mathematical expression：
Wherein, Z is the coordinate value of optical axis direction, using optical transmission direction as positive direction；Y is the coordinate for being orthogonal to optical axis direction
Value, using top as positive direction；R is radius of curvature；K is circular cone coefficient；A4、A6、A8、A10、A12Respectively 4 times, 6 times, 8 times, 10
Secondary, 12 item asphericity coefficients.
The radius of curvature R of the minute surface of each lens, refractive index N in zoom lens shown in Fig. 2d, Abbe number Vd, Yi Jizhong
Heart thickness Tc(i.e. the distance of adjacent mirror facets central point), meet along each minute surface of optical axis from the object side to image side listed by table 1
Condition：
Table 1
Wherein, STO represents diaphragm, and IMA represents image plane, and Infinity represents infinitely great；Along optical axis from thing side to picture
Side, the minute surface of lens are arranged in order, such as：The minute surface of lens 11 is minute surface 1 and minute surface 2, and the minute surface of lens 12 is minute surface 3 and mirror
Face 4, the like, wherein, minute surface 25 and the minute surface that minute surface 26 is optical filter, because lens 12 and lens 13 are glued together,
Therefore the cemented surface of lens 12 and lens 13 is same minute surface (i.e. minute surface 4), and other cemented surfaces are also similar, minute surface 11, minute surface
12nd, minute surface 19, minute surface 20, minute surface 23, minute surface 24 are aspherical minute surface, and the W in table one in center thickness column is represented in wide-angle
The distance of adjacent two minute surfaces central point during end, such as：T5 (W) represents the distance of minute surface 5 and the central point of minute surface 6 in wide-angle side,
T in center thickness column represents the distance in the adjacent two minute surface central points of telescope end phase, such as：T5 (T) is represented in telescope end
The distance of minute surface 5 and the central point of minute surface 6, R1 represents the radius of curvature of minute surface 1 in table one, and T1 represents minute surface 1 and the central point of minute surface 2
Distance, n1 represent minute surface 1 optical glass material relative to d light refractive index, V1 represent minute surface 1 optical glass material phase
For the Abbe number of d light, other parameters in table one can the like its implication, will not be repeated here.
In the utility model embodiment, the radius of curvature R of the minute surface of 13 lens, optical glass material used by restriction
Matter relative to d light refractive index Nd, optical glass material relative to d light Abbe number VdAnd center thickness TcSo that varifocal mirror
The parameter such as planform, Abbe number of head matches with image-forming condition, so make the spherical aberration of zoom lens, coma, astigmatism, the curvature of field,
Chromatic longitudiinal aberration, axial chromatic aberration are corrected well, so as to reach under conditions of big image planes are met, while meet large aperture,
High-resolution, and then realize the low blur-free imaging according under environment.
When meeting conditions above, it ensure that the aberration of whole zoom lens is corrected well, properties meet
Requirement.
In specific implementation process, the radius of curvature R of the minute surface of each lens, center are thick in the zoom lens shown in Fig. 2
Spend Tc, refractive index NdAnd Abbe number VdMeet the condition listed by table 2：
Table 2
In addition, the non-spherical lens (the 6th lens 16, the 11st lens 21 and the 13rd lens 23) in above-described embodiment
Minute surface, i.e. minute surface 11, minute surface 12, minute surface 19, minute surface 20, minute surface 23, the asphericity coefficient of minute surface 24 meet the bar listed by table 3
Part：
Table 3
It is noted that the zoom lens of the utility model embodiment has following optical technology index：
Optics overall length TTL：150mm；
Lens focus f：12mm (W)~40mm (T)；
The angle of visual field of camera lens：113.4 ° of (W)~34.7 ° (T)；
The aperture (F/#) of lens system：1.3 (W)~2.4 (T)；
Camera lens image planes size：4/3〞.
Wherein, (W) represents wide-angle side；(T) telescope end is represented.
Below by detailed Optical system is carried out to the utility model embodiment, the utility model is further described
The zoom-lens system and zoom lens that embodiment is provided.
Optical transfer function be for evaluating the mode that the image quality of an optical system is more accurate, directly perceived and common,
Its curve is higher, more smooth, shows that the image quality of system is better, to various aberrations (such as：Spherical aberration, coma, astigmatism, the curvature of field, axle
To aberration, chromatic longitudiinal aberration etc.) carry out good correction.
As shown in Figure 3, Figure 4, wherein, Fig. 3 is the optical transfer function of zoom lens visible light part in wide-angle side
(MTF) curve map；Fig. 4 is optical transfer function (MTF) curve map of zoom lens visible light part in telescope end.From Fig. 3
In understand, optical transfer function (MTF) curve map of zoom lens visible light part in wide-angle side is smoother, concentrates, and
And full filed MTF average values reach more than 0.7, as can be known from Fig. 4, the optics of zoom lens visible light part in telescope end
Transmission function (MTF) curve map is smoother, concentrates, and full filed MTF average values reach more than 0.7, it is seen that the present embodiment carries
The zoom lens of confession, very high resolution ratio can be reached, meet the imaging requirements of 4/3 inch of 12,000,000 pixel camera machine.
Curvature of field figure corresponding to zoom lens visible light part is made up of three curve T and three curve S；Wherein, three songs
Line T represents the aberration of meridional beam (Tangential Rays) corresponding to three kinds of wavelength (486nm, 587nm and 656nm) respectively,
Three curve S represent sagittal beam (Sagittial Rays) corresponding to three kinds of wavelength (486nm, 587nm and 656nm) respectively
Aberration, meridianal curvature of field value and Sagittal field curvature value are smaller, illustrate that image quality is better.As shown in figure 5, zoom lens is in wide-angle side
When, meridianal curvature of field value control in the range of -0.02~0.022mm, Sagittal field curvature value control -0.015~0.022mm scopes with
It is interior, as shown in fig. 6, zoom lens, in telescope end, meridianal curvature of field value is controlled in the range of -0.08~0.08mm, Sagittal field curvature
Value control is within -0.025~0.045mm scopes.
Axial chromatic aberration figure corresponding to zoom lens visible light part, curve changes near y-axis in figure, closer to y-axis, says
Bright lens combination image quality is better.Zoom lens is in wide-angle side, when entrance pupil radius is 4.667 millimeters, as shown in fig. 7,
Its axial chromatic aberration is controlled between -0.03~+0.022mm, and zoom lens is in telescope end, when entrance pupil radius is 7.7932 millimeters
When, as shown in figure 8, the control of its axial chromatic aberration is between -0.086~+0.048mm.
Chromatic longitudiinal aberration figure corresponding to zoom lens visible light part, curve illustrate lens combination image quality closer to y-axis
Better.When maximum field of view is 11.4 millimeters, as shown in figure 9, zoom lens is in wide-angle side, the control of its chromatic longitudiinal aberration-
Between 0.00153~+0.0035mm, as shown in Figure 10, in telescope end, its chromatic longitudiinal aberration controls -0.00075 zoom lens
Between~+0.0004mm.
In summary, the utility model embodiment provides a kind of zoom-lens system and zoom lens, using 13
The optical lens of specific structure shape, and be arranged in order in sequence from thing side to image side, and pass through each optical lens
The distribution of focal power, while using adaptable optical glass material so that the planform of zoom lens, power of lens point
Match somebody with somebody, the parameter such as the refractive indexes of lens, Abbe number matches with image-forming condition, and then makes the spherical aberration of zoom lens, coma, astigmatism, field
Song, chromatic longitudiinal aberration, axial chromatic aberration are corrected well, so as to reach under conditions of big image planes are met, while meet big light
Circle, high-resolution, and then realize the low blur-free imaging according under environment；And non-spherical lens is used in the 4th lens group, is made
Obtain properties of product and appearance and size is matched well, so as to be widely applied to protection and monitor field.
Although having been described for preferred embodiment of the present utility model, those skilled in the art once know substantially
Creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to wrap
Include preferred embodiment and fall into having altered and changing for the scope of the utility model.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility model
New spirit and scope.So, if these modifications and variations of the present utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.
Claims (13)
1. a kind of zoom-lens system, it is characterised in that include successively from the object side to image side along optical axis：Focal power is negative the
One lens group, focal power are the second negative lens group, focal power is positive the 3rd lens group and focal power is the 4th positive lens
Group；Also include being arranged between second lens group and the 3rd lens group, or be arranged on the 3rd lens group and institute
State the aperture diaphragm between the 4th lens group；
Wherein, the 4th lens group, include successively from the object side to image side along optical axis：Focal power is the 6th positive lens, light
Focal power is the first negative sub-lens group, focal power is positive the second sub-lens group and focal power is the 3rd negative sub-lens group；
Wherein, the 6th lens are non-spherical lens；
Also, each lens and the focal length of lens group meet following condition：
-3.32≤f1/fw≤-2.32；2.3≤f4/fw≤ 3.3, and 1.46≤f4/ft≤2.06；
0.61≤f41/f4≤0.91；0.33≤f46/f4≤0.73；
Wherein, f1Represent the focal length of first lens group, f4Represent the focal length of the 4th lens group, fwRepresent the zoom
Lens combination is in the focal length of wide-angle side, ftRepresent focal length of the zoom-lens system in telescope end, f41Represent that the described 6th is saturating
The focal length of mirror, f46Represent the focal length of the second sub-lens group.
2. zoom-lens system as claimed in claim 1, it is characterised in that the focal length f of second lens group2Meet bar
Part：-10.8≤f2/fw≤-8.8。
3. zoom-lens system as claimed in claim 2, it is characterised in that the focal length f of the 3rd lens group3Meet condition：
7.5≤f3/fw≤8.5。
4. zoom-lens system as claimed in claim 3, it is characterised in that the first sub-lens group is along optical axis from thing side
Include successively to image side：Focal power is the 7th negative lens, focal power is the 8th positive lens, focal power is that negative the 9th is saturating
Mirror, focal power are the tenth positive lens；Wherein, the 7th lens are the meniscus lens convex surface facing thing side, and the described 8th is saturating
Mirror and the tenth lens are respectively biconvex lens, and the 9th lens are biconcave lens, the 8th lens and the tenth lens Ah
Shellfish number is between 55 to 91.
5. zoom-lens system as claimed in claim 4, it is characterised in that the 8th lens are glued with the 9th lens
Together, and the 9th lens and the tenth lens are glued together；Or
7th lens and the 8th lens are glued together, and the 9th lens are glued at one with the tenth lens
Rise.
6. zoom-lens system as claimed in claim 4, it is characterised in that the second sub-lens group includes focal power for just
The 11st lens；Wherein, the 11st lens are non-spherical lens, and the refraction of the glass material of the 11st lens
Rate Nd11Meet condition：Nd11≥1.84。
7. zoom-lens system as claimed in claim 6, it is characterised in that the 3rd sub-lens group is along optical axis from thing side
Include successively to image side：Focal power is negative the 12nd lens and focal power is the 13rd negative lens；Wherein, the described 12nd
Lens are biconcave lens, and the 13rd lens are non-spherical lens.
8. the zoom-lens system as described in any one of claim 1~7, it is characterised in that first lens group, along optical axis
Line includes successively from the object side to image side：Focal power is the first negative lens, focal power is negative the second lens and focal power is just
The 3rd lens；Wherein, first lens are the meniscus lens convex surface facing thing side, and second lens are biconcave lens,
3rd lens are saturating convex surface facing the plano-convex that the meniscus lens of thing side, biconvex lens or surface towards image side are plane
Mirror.
9. zoom-lens system as claimed in claim 8, it is characterised in that second lens are glued with the 3rd lens
Together.
10. zoom-lens system as claimed in claim 8, it is characterised in that second lens group is negative including focal power
The 4th lens；Wherein, the 4th lens are the meniscus lens convex surface facing image side.
11. zoom-lens system as claimed in claim 10, it is characterised in that the 3rd lens group comprises at least focal power
For the 5th positive lens；Wherein, the planoconvex spotlight that the 5th lens are biconvex lens or the surface towards thing side is plane.
12. a kind of zoom lens, it is characterised in that include successively from the object side to image side along optical axis：Such as claim 1~11 times
Zoom-lens system and imaging surface described in one.
13. zoom lens as claimed in claim 12, it is characterised in that also include：Be arranged at the zoom-lens system with
Optical filter between the imaging surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383001.8U CN207020389U (en) | 2017-04-12 | 2017-04-12 | A kind of zoom-lens system and zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383001.8U CN207020389U (en) | 2017-04-12 | 2017-04-12 | A kind of zoom-lens system and zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207020389U true CN207020389U (en) | 2018-02-16 |
Family
ID=61460492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720383001.8U Active CN207020389U (en) | 2017-04-12 | 2017-04-12 | A kind of zoom-lens system and zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207020389U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116521A (en) * | 2018-10-22 | 2019-01-01 | 舜宇光学(中山)有限公司 | A kind of imaging system |
| CN110275280A (en) * | 2019-08-09 | 2019-09-24 | 舜宇光学(中山)有限公司 | Optical imaging system |
| CN114488504A (en) * | 2021-12-31 | 2022-05-13 | 宁波永新光学股份有限公司 | Apochromatic objective lens with large numerical aperture |
| CN117111281A (en) * | 2023-10-25 | 2023-11-24 | 成都量芯集成科技有限公司 | Zoom optical system |
| CN110275280B (en) * | 2019-08-09 | 2024-07-12 | 舜宇光学(中山)有限公司 | Optical imaging system |
-
2017
- 2017-04-12 CN CN201720383001.8U patent/CN207020389U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116521A (en) * | 2018-10-22 | 2019-01-01 | 舜宇光学(中山)有限公司 | A kind of imaging system |
| CN110275280A (en) * | 2019-08-09 | 2019-09-24 | 舜宇光学(中山)有限公司 | Optical imaging system |
| CN110275280B (en) * | 2019-08-09 | 2024-07-12 | 舜宇光学(中山)有限公司 | Optical imaging system |
| CN114488504A (en) * | 2021-12-31 | 2022-05-13 | 宁波永新光学股份有限公司 | Apochromatic objective lens with large numerical aperture |
| CN114488504B (en) * | 2021-12-31 | 2024-01-16 | 宁波永新光学股份有限公司 | Apochromatic objective lens with large numerical aperture |
| CN117111281A (en) * | 2023-10-25 | 2023-11-24 | 成都量芯集成科技有限公司 | Zoom optical system |
| CN117111281B (en) * | 2023-10-25 | 2024-01-02 | 成都量芯集成科技有限公司 | Zoom optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105629443B (en) | A kind of lens combination and camera lens | |
| CN104718484B (en) | Eyepiece optical system, Optical devices, and the method for manufacture eyepiece optical system | |
| CN106324798B (en) | A kind of lens system and camera lens | |
| CN108318995B (en) | Lens system and lens | |
| CN104360462B (en) | Wide-angle lens | |
| CN107678147B (en) | A kind of lens system, fish eye lens and image collecting device | |
| CN106772935A (en) | A kind of lens combination and tight shot | |
| CN207020389U (en) | A kind of zoom-lens system and zoom lens | |
| CN106908940A (en) | The method of zoom lens, imaging device and manufacture zoom lens | |
| CN106324815A (en) | Zoom lens system and lens | |
| CN114167578B (en) | Lens | |
| CN105938241A (en) | Zoom lens and photographing apparatus including the same | |
| CN209167653U (en) | A kind of ultra-thin fish eye lens | |
| CN204807794U (en) | Zoom lens system and camera lens | |
| CN206331171U (en) | A kind of lens combination and tight shot | |
| CN217767016U (en) | Zoom lens | |
| CN105445909B (en) | Optical lens | |
| CN114859532B (en) | Lens and camera device | |
| CN114167579B (en) | Lens | |
| CN114236772B (en) | Lens | |
| CN206282021U (en) | A kind of wide-angle lens | |
| CN214225558U (en) | Fixed focus lens | |
| CN210323549U (en) | Fixed focus lens | |
| CN108983402A (en) | Large aperture camera lens | |
| CN211603694U (en) | Optical imaging lens of wide angle high definition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |